.gitignore

@@ -0,0 +1 @@
+/mobile/.env

Backend/Api/Auth/Check.go

@@ -0,0 +1,9 @@
+package Auth
+
+import (
+	"net/http"
+)
+
+func Check(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusOK)
+}

Backend/Api/Auth/Login.go

@@ -0,0 +1,108 @@
+package Auth
+
+import (
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+type Credentials struct {
+	Username string `json:"username"`
+	Password string `json:"password"`
+}
+
+type loginResponse struct {
+	Status               string `json:"status"`
+	Message              string `json:"message"`
+	AsymmetricPublicKey  string `json:"asymmetric_public_key"`
+	AsymmetricPrivateKey string `json:"asymmetric_private_key"`
+	UserID               string `json:"user_id"`
+	Username             string `json:"username"`
+}
+
+func makeLoginResponse(w http.ResponseWriter, code int, message, pubKey, privKey string, user Models.User) {
+	var (
+		status     string = "error"
+		returnJson []byte
+		err        error
+	)
+	if code > 200 && code < 300 {
+		status = "success"
+	}
+
+	returnJson, err = json.MarshalIndent(loginResponse{
+		Status:               status,
+		Message:              message,
+		AsymmetricPublicKey:  pubKey,
+		AsymmetricPrivateKey: privKey,
+		UserID:               user.ID.String(),
+		Username:             user.Username,
+	}, "", "  ")
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	// Return updated json
+	w.WriteHeader(code)
+	w.Write(returnJson)
+}
+
+func Login(w http.ResponseWriter, r *http.Request) {
+	var (
+		creds     Credentials
+		userData  Models.User
+		session   Models.Session
+		expiresAt time.Time
+		err       error
+	)
+
+	err = json.NewDecoder(r.Body).Decode(&creds)
+	if err != nil {
+		makeLoginResponse(w, http.StatusInternalServerError, "An error occurred", "", "", userData)
+		return
+	}
+
+	userData, err = Database.GetUserByUsername(creds.Username)
+	if err != nil {
+		makeLoginResponse(w, http.StatusUnauthorized, "An error occurred", "", "", userData)
+		return
+	}
+
+	if !CheckPasswordHash(creds.Password, userData.Password) {
+		makeLoginResponse(w, http.StatusUnauthorized, "An error occurred", "", "", userData)
+		return
+	}
+
+	// TODO: Revisit before production
+	expiresAt = time.Now().Add(12 * time.Hour)
+
+	session = Models.Session{
+		UserID: userData.ID,
+		Expiry: expiresAt,
+	}
+
+	err = Database.CreateSession(&session)
+	if err != nil {
+		makeLoginResponse(w, http.StatusUnauthorized, "An error occurred", "", "", userData)
+		return
+	}
+
+	http.SetCookie(w, &http.Cookie{
+		Name:    "session_token",
+		Value:   session.ID.String(),
+		Expires: expiresAt,
+	})
+
+	makeLoginResponse(
+		w,
+		http.StatusOK,
+		"Successfully logged in",
+		userData.AsymmetricPublicKey,
+		userData.AsymmetricPrivateKey,
+		userData,
+	)
+}

Backend/Api/Auth/Logout.go

@@ -0,0 +1,40 @@
+package Auth
+
+import (
+	"log"
+	"net/http"
+	"time"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+)
+
+func Logout(w http.ResponseWriter, r *http.Request) {
+	var (
+		c            *http.Cookie
+		sessionToken string
+		err          error
+	)
+
+	c, err = r.Cookie("session_token")
+	if err != nil {
+		if err == http.ErrNoCookie {
+			w.WriteHeader(http.StatusUnauthorized)
+			return
+		}
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	sessionToken = c.Value
+
+	err = Database.DeleteSessionById(sessionToken)
+	if err != nil {
+		log.Println("Could not delete session cookie")
+	}
+
+	http.SetCookie(w, &http.Cookie{
+		Name:    "session_token",
+		Value:   "",
+		Expires: time.Now(),
+	})
+}

Backend/Api/Auth/Passwords.go

@@ -0,0 +1,22 @@
+package Auth
+
+import (
+	"golang.org/x/crypto/bcrypt"
+)
+
+func HashPassword(password string) (string, error) {
+	var (
+		bytes []byte
+		err   error
+	)
+	bytes, err = bcrypt.GenerateFromPassword([]byte(password), 14)
+	return string(bytes), err
+}
+
+func CheckPasswordHash(password, hash string) bool {
+	var (
+		err error
+	)
+	err = bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+	return err == nil
+}

Backend/Api/Auth/Session.go

@@ -0,0 +1,54 @@
+package Auth
+
+import (
+	"errors"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+func CheckCookie(r *http.Request) (Models.Session, error) {
+	var (
+		c            *http.Cookie
+		sessionToken string
+		userSession  Models.Session
+		err          error
+	)
+
+	c, err = r.Cookie("session_token")
+	if err != nil {
+		return userSession, err
+	}
+	sessionToken = c.Value
+
+	// We then get the session from our session map
+	userSession, err = Database.GetSessionById(sessionToken)
+	if err != nil {
+		return userSession, errors.New("Cookie not found")
+	}
+
+	// If the session is present, but has expired, we can delete the session, and return
+	// an unauthorized status
+	if userSession.IsExpired() {
+		Database.DeleteSession(&userSession)
+		return userSession, errors.New("Cookie expired")
+	}
+
+	return userSession, nil
+}
+
+func CheckCookieCurrentUser(w http.ResponseWriter, r *http.Request) (Models.User, error) {
+	var (
+		session  Models.Session
+		userData Models.User
+		err      error
+	)
+
+	session, err = CheckCookie(r)
+	if err != nil {
+		return userData, err
+	}
+
+	return session.User, nil
+}

Backend/Api/Auth/Signup.go

@@ -0,0 +1,95 @@
+package Auth
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"log"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/JsonSerialization"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+type signupResponse struct {
+	Status  string `json:"status"`
+	Message string `json:"message"`
+}
+
+func makeSignupResponse(w http.ResponseWriter, code int, message string) {
+	var (
+		status     string = "error"
+		returnJson []byte
+		err        error
+	)
+	if code > 200 && code < 300 {
+		status = "success"
+	}
+
+	returnJson, err = json.MarshalIndent(signupResponse{
+		Status:  status,
+		Message: message,
+	}, "", "  ")
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	// Return updated json
+	w.WriteHeader(code)
+	w.Write(returnJson)
+
+}
+
+func Signup(w http.ResponseWriter, r *http.Request) {
+	var (
+		userData    Models.User
+		requestBody []byte
+		err         error
+	)
+
+	requestBody, err = ioutil.ReadAll(r.Body)
+	if err != nil {
+		log.Printf("Error encountered reading POST body: %s\n", err.Error())
+		makeSignupResponse(w, http.StatusInternalServerError, "An error occurred")
+		return
+	}
+
+	userData, err = JsonSerialization.DeserializeUser(requestBody, []string{
+		"id",
+	}, false)
+	if err != nil {
+		log.Printf("Invalid data provided to Signup: %s\n", err.Error())
+		makeSignupResponse(w, http.StatusUnprocessableEntity, "Invalid data provided")
+		return
+	}
+
+	if userData.Username == "" ||
+		userData.Password == "" ||
+		userData.ConfirmPassword == "" ||
+		len(userData.AsymmetricPrivateKey) == 0 ||
+		len(userData.AsymmetricPublicKey) == 0 {
+		makeSignupResponse(w, http.StatusUnprocessableEntity, "Invalid data provided")
+		return
+	}
+
+	err = Database.CheckUniqueUsername(userData.Username)
+	if err != nil {
+		makeSignupResponse(w, http.StatusUnprocessableEntity, "Invalid data provided")
+		return
+	}
+
+	userData.Password, err = HashPassword(userData.Password)
+	if err != nil {
+		makeSignupResponse(w, http.StatusInternalServerError, "An error occurred")
+		return
+	}
+
+	err = Database.CreateUser(&userData)
+	if err != nil {
+		makeSignupResponse(w, http.StatusInternalServerError, "An error occurred")
+		return
+	}
+
+	makeSignupResponse(w, http.StatusCreated, "Successfully signed up")
+}

Backend/Api/Friends/AcceptFriendRequest.go

@@ -0,0 +1,70 @@
+package Friends
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+	"github.com/gorilla/mux"
+)
+
+// AcceptFriendRequest accepts friend requests
+func AcceptFriendRequest(w http.ResponseWriter, r *http.Request) {
+	var (
+		oldFriendRequest Models.FriendRequest
+		newFriendRequest Models.FriendRequest
+		urlVars          map[string]string
+		friendRequestID  string
+		requestBody      []byte
+		ok               bool
+		err              error
+	)
+
+	urlVars = mux.Vars(r)
+	friendRequestID, ok = urlVars["requestID"]
+	if !ok {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	oldFriendRequest, err = Database.GetFriendRequestByID(friendRequestID)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	oldFriendRequest.AcceptedAt.Time = time.Now()
+	oldFriendRequest.AcceptedAt.Valid = true
+
+	requestBody, err = ioutil.ReadAll(r.Body)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = json.Unmarshal(requestBody, &newFriendRequest)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = Database.UpdateFriendRequest(&oldFriendRequest)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	newFriendRequest.AcceptedAt.Time = time.Now()
+	newFriendRequest.AcceptedAt.Valid = true
+
+	err = Database.CreateFriendRequest(&newFriendRequest)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}

Backend/Api/Friends/EncryptedFriendsList.go

@@ -0,0 +1,41 @@
+package Friends
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Auth"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+// EncryptedFriendRequestList gets friend request list
+func EncryptedFriendRequestList(w http.ResponseWriter, r *http.Request) {
+	var (
+		userSession Models.Session
+		friends     []Models.FriendRequest
+		returnJSON  []byte
+		err         error
+	)
+
+	userSession, err = Auth.CheckCookie(r)
+	if err != nil {
+		http.Error(w, "Forbidden", http.StatusUnauthorized)
+		return
+	}
+
+	friends, err = Database.GetFriendRequestsByUserID(userSession.UserID.String())
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	returnJSON, err = json.MarshalIndent(friends, "", "  ")
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+	w.Write(returnJSON)
+}

Backend/Api/Friends/FriendRequest.go

@@ -0,0 +1,60 @@
+package Friends
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Util"
+)
+
+func FriendRequest(w http.ResponseWriter, r *http.Request) {
+	var (
+		user          Models.User
+		requestBody   []byte
+		requestJson   map[string]interface{}
+		friendID      string
+		friendRequest Models.FriendRequest
+		ok            bool
+		err           error
+	)
+
+	user, err = Util.GetUserById(w, r)
+	if err != nil {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	requestBody, err = ioutil.ReadAll(r.Body)
+	if err != nil {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	json.Unmarshal(requestBody, &requestJson)
+	if requestJson["id"] == nil {
+		http.Error(w, "Invalid Data", http.StatusBadRequest)
+		return
+	}
+
+	friendID, ok = requestJson["id"].(string)
+	if !ok {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	friendRequest = Models.FriendRequest{
+		UserID:   user.ID,
+		FriendID: friendID,
+	}
+
+	err = Database.CreateFriendRequest(&friendRequest)
+	if requestJson["id"] == nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}

Backend/Api/Friends/Friends.go

@@ -0,0 +1,87 @@
+package Friends
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+// CreateFriendRequest creates a FriendRequest from post data
+func CreateFriendRequest(w http.ResponseWriter, r *http.Request) {
+	var (
+		friendRequest Models.FriendRequest
+		requestBody   []byte
+		returnJSON    []byte
+		err           error
+	)
+
+	requestBody, err = ioutil.ReadAll(r.Body)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = json.Unmarshal(requestBody, &friendRequest)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	friendRequest.AcceptedAt.Scan(nil)
+
+	err = Database.CreateFriendRequest(&friendRequest)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	returnJSON, err = json.MarshalIndent(friendRequest, "", "  ")
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	// Return updated json
+	w.WriteHeader(http.StatusOK)
+	w.Write(returnJSON)
+}
+
+// CreateFriendRequestQrCode creates a FriendRequest from post data from qr code scan
+func CreateFriendRequestQrCode(w http.ResponseWriter, r *http.Request) {
+	var (
+		friendRequests []Models.FriendRequest
+		requestBody    []byte
+		i              int
+		err            error
+	)
+
+	requestBody, err = ioutil.ReadAll(r.Body)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = json.Unmarshal(requestBody, &friendRequests)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	for i = range friendRequests {
+		friendRequests[i].AcceptedAt.Time = time.Now()
+		friendRequests[i].AcceptedAt.Valid = true
+	}
+
+	err = Database.CreateFriendRequests(&friendRequests)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	// Return updated json
+	w.WriteHeader(http.StatusOK)
+}

Backend/Api/Friends/RejectFriendRequest.go

@@ -0,0 +1,42 @@
+package Friends
+
+import (
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"github.com/gorilla/mux"
+)
+
+// RejectFriendRequest rejects friend requests
+func RejectFriendRequest(w http.ResponseWriter, r *http.Request) {
+	var (
+		friendRequest   Models.FriendRequest
+		urlVars         map[string]string
+		friendRequestID string
+		ok              bool
+		err             error
+	)
+
+	urlVars = mux.Vars(r)
+	friendRequestID, ok = urlVars["requestID"]
+	if !ok {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	friendRequest, err = Database.GetFriendRequestByID(friendRequestID)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = Database.DeleteFriendRequest(&friendRequest)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}

Backend/Api/JsonSerialization/DeserializeUserJson.go

@@ -0,0 +1,76 @@
+package JsonSerialization
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strings"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	schema "github.com/Kangaroux/go-map-schema"
+)
+
+func DeserializeUser(data []byte, allowMissing []string, allowAllMissing bool) (Models.User, error) {
+	var (
+		userData                 Models.User            = Models.User{}
+		jsonStructureTest        map[string]interface{} = make(map[string]interface{})
+		jsonStructureTestResults *schema.CompareResults
+		field                    schema.FieldMissing
+		allowed                  string
+		missingFields            []string
+		i                        int
+		err                      error
+	)
+
+	// Verify the JSON has the correct structure
+	json.Unmarshal(data, &jsonStructureTest)
+	jsonStructureTestResults, err = schema.CompareMapToStruct(
+		&userData,
+		jsonStructureTest,
+		&schema.CompareOpts{
+			ConvertibleFunc: CanConvert,
+			TypeNameFunc:    schema.DetailedTypeName,
+		})
+	if err != nil {
+		return userData, err
+	}
+
+	if len(jsonStructureTestResults.MismatchedFields) > 0 {
+		return userData, errors.New(fmt.Sprintf(
+			"MismatchedFields found when deserializing data: %s",
+			jsonStructureTestResults.Errors().Error(),
+		))
+	}
+
+	// Remove allowed missing fields from MissingFields
+	for _, allowed = range allowMissing {
+		for i, field = range jsonStructureTestResults.MissingFields {
+			if allowed == field.String() {
+				jsonStructureTestResults.MissingFields = append(
+					jsonStructureTestResults.MissingFields[:i],
+					jsonStructureTestResults.MissingFields[i+1:]...,
+				)
+			}
+		}
+	}
+
+	if !allowAllMissing && len(jsonStructureTestResults.MissingFields) > 0 {
+		for _, field = range jsonStructureTestResults.MissingFields {
+			missingFields = append(missingFields, field.String())
+		}
+
+		return userData, errors.New(fmt.Sprintf(
+			"MissingFields found when deserializing data: %s",
+			strings.Join(missingFields, ", "),
+		))
+	}
+
+	// Deserialize the JSON into the struct
+	err = json.Unmarshal(data, &userData)
+	if err != nil {
+		return userData, err
+	}
+
+	return userData, err
+}

Backend/Api/JsonSerialization/VerifyJson.go

@@ -0,0 +1,109 @@
+package JsonSerialization
+
+import (
+	"math"
+	"reflect"
+)
+
+// isIntegerType returns whether the type is an integer and if it's unsigned.
+// See: https://github.com/Kangaroux/go-map-schema/blob/master/schema.go#L328
+func isIntegerType(t reflect.Type) (bool, bool) {
+	var (
+		yes      bool
+		unsigned bool
+	)
+	switch t.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		yes = true
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		yes = true
+		unsigned = true
+	}
+
+	return yes, unsigned
+}
+
+// isFloatType returns true if the type is a floating point. Note that this doesn't
+// care about the value -- unmarshaling the number "0" gives a float, not an int.
+// See: https://github.com/Kangaroux/go-map-schema/blob/master/schema.go#L319
+func isFloatType(t reflect.Type) bool {
+	var (
+		yes bool
+	)
+	switch t.Kind() {
+	case reflect.Float32, reflect.Float64:
+		yes = true
+	}
+
+	return yes
+}
+
+// CanConvert returns whether value v is convertible to type t.
+//
+// If t is a pointer and v is not nil, it checks if v is convertible to the type that
+// t points to.
+// Modified due to not handling slices (DefaultCanConvert fails on PhotoUrls and Tags)
+// See: https://github.com/Kangaroux/go-map-schema/blob/master/schema.go#L191
+func CanConvert(t reflect.Type, v reflect.Value) bool {
+	var (
+		isPtr    bool
+		isStruct bool
+		isArray  bool
+		dstType  reflect.Type
+		dstInt   bool
+		unsigned bool
+		f        float64
+		srcInt   bool
+	)
+
+	isPtr = t.Kind() == reflect.Ptr
+	isStruct = t.Kind() == reflect.Struct
+	isArray = t.Kind() == reflect.Array
+	dstType = t
+
+	// Check if v is a nil value.
+	if !v.IsValid() || (v.CanAddr() && v.IsNil()) {
+		return isPtr
+	}
+
+	// If the dst is a pointer, check if we can convert to the type it's pointing to.
+	if isPtr {
+		dstType = t.Elem()
+		isStruct = t.Elem().Kind() == reflect.Struct
+	}
+
+	// If the dst is a struct, we should check its nested fields.
+	if isStruct {
+		return v.Kind() == reflect.Map
+	}
+
+	if isArray {
+		return v.Kind() == reflect.String
+	}
+
+	if t.Kind() == reflect.Slice {
+		return v.Kind() == reflect.Slice
+	}
+
+	if !v.Type().ConvertibleTo(dstType) {
+		return false
+	}
+
+	// Handle converting to an integer type.
+	dstInt, unsigned = isIntegerType(dstType)
+	if dstInt {
+		if isFloatType(v.Type()) {
+			f = v.Float()
+
+			if math.Trunc(f) != f || unsigned && f < 0 {
+				return false
+			}
+		}
+		srcInt, _ = isIntegerType(v.Type())
+		if srcInt && unsigned && v.Int() < 0 {
+			return false
+		}
+	}
+
+	return true
+}

Backend/Api/Messages/Conversations.go

@@ -0,0 +1,84 @@
+package Messages
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Auth"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+// EncryptedConversationList returns an encrypted list of all Conversations
+func EncryptedConversationList(w http.ResponseWriter, r *http.Request) {
+	var (
+		userConversations []Models.UserConversation
+		userSession       Models.Session
+		returnJSON        []byte
+		err               error
+	)
+
+	userSession, err = Auth.CheckCookie(r)
+	if err != nil {
+		http.Error(w, "Forbidden", http.StatusUnauthorized)
+		return
+	}
+
+	userConversations, err = Database.GetUserConversationsByUserId(
+		userSession.UserID.String(),
+	)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	returnJSON, err = json.MarshalIndent(userConversations, "", "  ")
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+	w.Write(returnJSON)
+}
+
+// EncryptedConversationDetailsList returns an encrypted list of all  ConversationDetails
+func EncryptedConversationDetailsList(w http.ResponseWriter, r *http.Request) {
+	var (
+		userConversations []Models.ConversationDetail
+		query             url.Values
+		conversationIds   []string
+		returnJSON        []byte
+		ok                bool
+		err               error
+	)
+
+	query = r.URL.Query()
+	conversationIds, ok = query["conversation_detail_ids"]
+	if !ok {
+		http.Error(w, "Invalid Data", http.StatusBadGateway)
+		return
+	}
+
+	// TODO: Fix error handling here
+	conversationIds = strings.Split(conversationIds[0], ",")
+
+	userConversations, err = Database.GetConversationDetailsByIds(
+		conversationIds,
+	)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	returnJSON, err = json.MarshalIndent(userConversations, "", "  ")
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+	w.Write(returnJSON)
+}

Backend/Api/Messages/CreateConversation.go

@@ -0,0 +1,58 @@
+package Messages
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/gofrs/uuid"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+// RawCreateConversationData for holding POST payload
+type RawCreateConversationData struct {
+	ID                string                          `json:"id"`
+	Name              string                          `json:"name"`
+	TwoUser           string                          `json:"two_user"`
+	Users             []Models.ConversationDetailUser `json:"users"`
+	UserConversations []Models.UserConversation       `json:"user_conversations"`
+}
+
+// CreateConversation creates ConversationDetail, ConversationDetailUsers and UserConversations
+func CreateConversation(w http.ResponseWriter, r *http.Request) {
+	var (
+		rawConversationData RawCreateConversationData
+		messageThread       Models.ConversationDetail
+		err                 error
+	)
+
+	err = json.NewDecoder(r.Body).Decode(&rawConversationData)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	messageThread = Models.ConversationDetail{
+		Base: Models.Base{
+			ID: uuid.FromStringOrNil(rawConversationData.ID),
+		},
+		Name:    rawConversationData.Name,
+		TwoUser: rawConversationData.TwoUser,
+		Users:   rawConversationData.Users,
+	}
+
+	err = Database.CreateConversationDetail(&messageThread)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = Database.CreateUserConversations(&rawConversationData.UserConversations)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+}

Backend/Api/Messages/CreateMessage.go

@@ -0,0 +1,41 @@
+package Messages
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+type RawMessageData struct {
+	MessageData Models.MessageData `json:"message_data"`
+	Messages    []Models.Message   `json:"message"`
+}
+
+func CreateMessage(w http.ResponseWriter, r *http.Request) {
+	var (
+		rawMessageData RawMessageData
+		err            error
+	)
+
+	err = json.NewDecoder(r.Body).Decode(&rawMessageData)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = Database.CreateMessageData(&rawMessageData.MessageData)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	err = Database.CreateMessages(&rawMessageData.Messages)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+}

Backend/Api/Messages/MessageThread.go

@@ -0,0 +1,45 @@
+package Messages
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"github.com/gorilla/mux"
+)
+
+// Messages gets messages by the associationKey
+func Messages(w http.ResponseWriter, r *http.Request) {
+	var (
+		messages       []Models.Message
+		urlVars        map[string]string
+		associationKey string
+		returnJSON     []byte
+		ok             bool
+		err            error
+	)
+
+	urlVars = mux.Vars(r)
+	associationKey, ok = urlVars["associationKey"]
+	if !ok {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	messages, err = Database.GetMessagesByAssociationKey(associationKey)
+	if !ok {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	returnJSON, err = json.MarshalIndent(messages, "", "  ")
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+	w.Write(returnJSON)
+}

Backend/Api/Messages/UpdateConversation.go

@@ -0,0 +1,56 @@
+package Messages
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/gofrs/uuid"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+type RawUpdateConversationData struct {
+	ID                string                          `json:"id"`
+	Name              string                          `json:"name"`
+	Users             []Models.ConversationDetailUser `json:"users"`
+	UserConversations []Models.UserConversation       `json:"user_conversations"`
+}
+
+func UpdateConversation(w http.ResponseWriter, r *http.Request) {
+	var (
+		rawConversationData RawCreateConversationData
+		messageThread       Models.ConversationDetail
+		err                 error
+	)
+
+	err = json.NewDecoder(r.Body).Decode(&rawConversationData)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	messageThread = Models.ConversationDetail{
+		Base: Models.Base{
+			ID: uuid.FromStringOrNil(rawConversationData.ID),
+		},
+		Name:  rawConversationData.Name,
+		Users: rawConversationData.Users,
+	}
+
+	err = Database.UpdateConversationDetail(&messageThread)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	if len(rawConversationData.UserConversations) > 0 {
+		err = Database.UpdateOrCreateUserConversations(&rawConversationData.UserConversations)
+		if err != nil {
+			http.Error(w, "Error", http.StatusInternalServerError)
+			return
+		}
+	}
+
+	w.WriteHeader(http.StatusOK)
+}

Backend/Api/Routes.go

@@ -0,0 +1,79 @@
+package Api
+
+import (
+	"log"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Auth"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Friends"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Messages"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Users"
+
+	"github.com/gorilla/mux"
+)
+
+func loggingMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		log.Printf(
+			"%s %s, Content Length: %d",
+			r.Method,
+			r.RequestURI,
+			r.ContentLength,
+		)
+
+		next.ServeHTTP(w, r)
+	})
+}
+
+func authenticationMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var err error
+
+		_, err = Auth.CheckCookie(r)
+		if err != nil {
+			http.Error(w, "Forbidden", http.StatusUnauthorized)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}
+
+// InitAPIEndpoints initializes all API endpoints required by mobile app
+func InitAPIEndpoints(router *mux.Router) {
+	var (
+		api     *mux.Router
+		authAPI *mux.Router
+	)
+
+	log.Println("Initializing API routes...")
+
+	api = router.PathPrefix("/api/v1/").Subrouter()
+	api.Use(loggingMiddleware)
+
+	// Define routes for authentication
+	api.HandleFunc("/signup", Auth.Signup).Methods("POST")
+	api.HandleFunc("/login", Auth.Login).Methods("POST")
+	api.HandleFunc("/logout", Auth.Logout).Methods("GET")
+
+	authAPI = api.PathPrefix("/auth/").Subrouter()
+	authAPI.Use(authenticationMiddleware)
+
+	authAPI.HandleFunc("/check", Auth.Check).Methods("GET")
+
+	authAPI.HandleFunc("/users", Users.SearchUsers).Methods("GET")
+
+	authAPI.HandleFunc("/friend_requests", Friends.EncryptedFriendRequestList).Methods("GET")
+	authAPI.HandleFunc("/friend_request", Friends.CreateFriendRequest).Methods("POST")
+	authAPI.HandleFunc("/friend_request/qr_code", Friends.CreateFriendRequestQrCode).Methods("POST")
+	authAPI.HandleFunc("/friend_request/{requestID}", Friends.AcceptFriendRequest).Methods("POST")
+	authAPI.HandleFunc("/friend_request/{requestID}", Friends.RejectFriendRequest).Methods("DELETE")
+
+	authAPI.HandleFunc("/conversations", Messages.EncryptedConversationList).Methods("GET")
+	authAPI.HandleFunc("/conversation_details", Messages.EncryptedConversationDetailsList).Methods("GET")
+	authAPI.HandleFunc("/conversations", Messages.CreateConversation).Methods("POST")
+	authAPI.HandleFunc("/conversations", Messages.UpdateConversation).Methods("PUT")
+
+	authAPI.HandleFunc("/message", Messages.CreateMessage).Methods("POST")
+	authAPI.HandleFunc("/messages/{associationKey}", Messages.Messages).Methods("GET")
+}

Backend/Api/Users/SearchUsers.go

@@ -0,0 +1,56 @@
+package Users
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/url"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+// SearchUsers searches a for a user by username
+func SearchUsers(w http.ResponseWriter, r *http.Request) {
+	var (
+		user        Models.User
+		query       url.Values
+		rawUsername []string
+		username    string
+		returnJSON  []byte
+		ok          bool
+		err         error
+	)
+
+	query = r.URL.Query()
+	rawUsername, ok = query["username"]
+	if !ok {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	if len(rawUsername) != 1 {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	username = rawUsername[0]
+
+	user, err = Database.GetUserByUsername(username)
+	if err != nil {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	user.Password = ""
+	user.AsymmetricPrivateKey = ""
+
+	returnJSON, err = json.MarshalIndent(user, "", "  ")
+	if err != nil {
+		panic(err)
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+	w.Write(returnJSON)
+}

Backend/Database/ConversationDetailUsers.go

@@ -0,0 +1,41 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+func GetConversationDetailUserById(id string) (Models.ConversationDetailUser, error) {
+	var (
+		messageThread Models.ConversationDetailUser
+		err           error
+	)
+
+	err = DB.Preload(clause.Associations).
+		Where("id = ?", id).
+		First(&messageThread).
+		Error
+
+	return messageThread, err
+}
+
+func CreateConversationDetailUser(messageThread *Models.ConversationDetailUser) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(messageThread).
+		Error
+}
+
+func UpdateConversationDetailUser(messageThread *Models.ConversationDetailUser) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Where("id = ?", messageThread.ID).
+		Updates(messageThread).
+		Error
+}
+
+func DeleteConversationDetailUser(messageThread *Models.ConversationDetailUser) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(messageThread).
+		Error
+}

Backend/Database/ConversationDetails.go

@@ -0,0 +1,55 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+func GetConversationDetailById(id string) (Models.ConversationDetail, error) {
+	var (
+		messageThread Models.ConversationDetail
+		err           error
+	)
+
+	err = DB.Preload(clause.Associations).
+		Where("id = ?", id).
+		First(&messageThread).
+		Error
+
+	return messageThread, err
+}
+
+func GetConversationDetailsByIds(id []string) ([]Models.ConversationDetail, error) {
+	var (
+		messageThread []Models.ConversationDetail
+		err           error
+	)
+
+	err = DB.Preload(clause.Associations).
+		Where("id IN ?", id).
+		Find(&messageThread).
+		Error
+
+	return messageThread, err
+}
+
+func CreateConversationDetail(messageThread *Models.ConversationDetail) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(messageThread).
+		Error
+}
+
+func UpdateConversationDetail(messageThread *Models.ConversationDetail) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Where("id = ?", messageThread.ID).
+		Updates(messageThread).
+		Error
+}
+
+func DeleteConversationDetail(messageThread *Models.ConversationDetail) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(messageThread).
+		Error
+}

Backend/Database/FriendRequests.go

@@ -0,0 +1,63 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+// GetFriendRequestByID gets friend request
+func GetFriendRequestByID(id string) (Models.FriendRequest, error) {
+	var (
+		friendRequest Models.FriendRequest
+		err           error
+	)
+
+	err = DB.Preload(clause.Associations).
+		First(&friendRequest, "id = ?", id).
+		Error
+
+	return friendRequest, err
+}
+
+// GetFriendRequestsByUserID gets friend request by user id
+func GetFriendRequestsByUserID(userID string) ([]Models.FriendRequest, error) {
+	var (
+		friends []Models.FriendRequest
+		err     error
+	)
+
+	err = DB.Model(Models.FriendRequest{}).
+		Where("user_id = ?", userID).
+		Find(&friends).
+		Error
+
+	return friends, err
+}
+
+// CreateFriendRequest creates friend request
+func CreateFriendRequest(friendRequest *Models.FriendRequest) error {
+	return DB.Create(friendRequest).
+		Error
+}
+
+// CreateFriendRequests creates multiple friend requests
+func CreateFriendRequests(friendRequest *[]Models.FriendRequest) error {
+	return DB.Create(friendRequest).
+		Error
+}
+
+// UpdateFriendRequest Updates friend request
+func UpdateFriendRequest(friendRequest *Models.FriendRequest) error {
+	return DB.Where("id = ?", friendRequest.ID).
+		Updates(friendRequest).
+		Error
+}
+
+// DeleteFriendRequest deletes friend request
+func DeleteFriendRequest(friendRequest *Models.FriendRequest) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(friendRequest).
+		Error
+}

Backend/Database/Init.go

@@ -0,0 +1,69 @@
+package Database
+
+import (
+	"log"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+const (
+	dbUrl     = "postgres://postgres:@localhost:5432/envelope"
+	dbTestUrl = "postgres://postgres:@localhost:5432/envelope_test"
+)
+
+var DB *gorm.DB
+
+func GetModels() []interface{} {
+	return []interface{}{
+		&Models.Session{},
+		&Models.User{},
+		&Models.FriendRequest{},
+		&Models.MessageData{},
+		&Models.Message{},
+		&Models.ConversationDetail{},
+		&Models.ConversationDetailUser{},
+		&Models.UserConversation{},
+	}
+}
+
+func Init() {
+	var (
+		model interface{}
+		err   error
+	)
+
+	log.Println("Initializing database...")
+
+	DB, err = gorm.Open(postgres.Open(dbUrl), &gorm.Config{})
+
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	log.Println("Running AutoMigrate...")
+
+	for _, model = range GetModels() {
+		DB.AutoMigrate(model)
+	}
+}
+
+func InitTest() {
+	var (
+		model interface{}
+		err   error
+	)
+
+	DB, err = gorm.Open(postgres.Open(dbTestUrl), &gorm.Config{})
+
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	for _, model = range GetModels() {
+		DB.Migrator().DropTable(model)
+		DB.AutoMigrate(model)
+	}
+}

Backend/Database/MessageData.go

@@ -0,0 +1,39 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+func GetMessageDataById(id string) (Models.MessageData, error) {
+	var (
+		messageData Models.MessageData
+		err         error
+	)
+
+	err = DB.Preload(clause.Associations).
+		First(&messageData, "id = ?", id).
+		Error
+
+	return messageData, err
+}
+
+func CreateMessageData(messageData *Models.MessageData) error {
+	var (
+		err error
+	)
+
+	err = DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(messageData).
+		Error
+
+	return err
+}
+
+func DeleteMessageData(messageData *Models.MessageData) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(messageData).
+		Error
+}

Backend/Database/Messages.go

@@ -0,0 +1,60 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+func GetMessageById(id string) (Models.Message, error) {
+	var (
+		message Models.Message
+		err     error
+	)
+
+	err = DB.Preload(clause.Associations).
+		First(&message, "id = ?", id).
+		Error
+
+	return message, err
+}
+
+func GetMessagesByAssociationKey(associationKey string) ([]Models.Message, error) {
+	var (
+		messages []Models.Message
+		err      error
+	)
+
+	err = DB.Preload("MessageData").
+		Find(&messages, "association_key = ?", associationKey).
+		Error
+
+	return messages, err
+}
+
+func CreateMessage(message *Models.Message) error {
+	var err error
+
+	err = DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(message).
+		Error
+
+	return err
+}
+
+func CreateMessages(messages *[]Models.Message) error {
+	var err error
+
+	err = DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(messages).
+		Error
+
+	return err
+}
+
+func DeleteMessage(message *Models.Message) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(message).
+		Error
+}

Backend/Database/Seeder/FriendSeeder.go

@@ -0,0 +1,113 @@
+package Seeder
+
+import (
+	"encoding/base64"
+	"time"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+func seedFriend(userRequestTo, userRequestFrom Models.User, accepted bool) error {
+	var (
+		friendRequest Models.FriendRequest
+		symKey        aesKey
+		encPublicKey  []byte
+		err           error
+	)
+
+	symKey, err = generateAesKey()
+	if err != nil {
+		return err
+	}
+
+	encPublicKey, err = symKey.aesEncrypt([]byte(publicKey))
+	if err != nil {
+		return err
+	}
+
+	friendRequest = Models.FriendRequest{
+		UserID: userRequestTo.ID,
+		FriendID: base64.StdEncoding.EncodeToString(
+			encryptWithPublicKey(
+				[]byte(userRequestFrom.ID.String()),
+				decodedPublicKey,
+			),
+		),
+		FriendUsername: base64.StdEncoding.EncodeToString(
+			encryptWithPublicKey(
+				[]byte(userRequestFrom.Username),
+				decodedPublicKey,
+			),
+		),
+		FriendPublicAsymmetricKey: base64.StdEncoding.EncodeToString(
+			encPublicKey,
+		),
+		SymmetricKey: base64.StdEncoding.EncodeToString(
+			encryptWithPublicKey(symKey.Key, decodedPublicKey),
+		),
+	}
+
+	if accepted {
+		friendRequest.AcceptedAt.Time = time.Now()
+		friendRequest.AcceptedAt.Valid = true
+	}
+
+	return Database.CreateFriendRequest(&friendRequest)
+}
+
+// SeedFriends creates dummy friends for testing/development
+func SeedFriends() {
+	var (
+		primaryUser   Models.User
+		secondaryUser Models.User
+		accepted      bool
+		i             int
+		err           error
+	)
+
+	primaryUser, err = Database.GetUserByUsername("testUser")
+	if err != nil {
+		panic(err)
+	}
+
+	secondaryUser, err = Database.GetUserByUsername("ATestUser2")
+	if err != nil {
+		panic(err)
+	}
+
+	err = seedFriend(primaryUser, secondaryUser, true)
+	if err != nil {
+		panic(err)
+	}
+
+	err = seedFriend(secondaryUser, primaryUser, true)
+	if err != nil {
+		panic(err)
+	}
+
+	accepted = false
+
+	for i = 0; i <= 5; i++ {
+		secondaryUser, err = Database.GetUserByUsername(userNames[i])
+		if err != nil {
+			panic(err)
+		}
+
+		if i > 3 {
+			accepted = true
+		}
+
+		err = seedFriend(primaryUser, secondaryUser, accepted)
+		if err != nil {
+			panic(err)
+		}
+
+		if accepted {
+			err = seedFriend(secondaryUser, primaryUser, accepted)
+			if err != nil {
+				panic(err)
+			}
+		}
+	}
+}

Backend/Database/Seeder/MessageSeeder.go

@@ -0,0 +1,313 @@
+package Seeder
+
+import (
+	"encoding/base64"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"github.com/gofrs/uuid"
+)
+
+func seedMessage(
+	primaryUser, secondaryUser Models.User,
+	primaryUserAssociationKey, secondaryUserAssociationKey string,
+	i int,
+) error {
+	var (
+		message            Models.Message
+		messageData        Models.MessageData
+		key, userKey       aesKey
+		keyCiphertext      []byte
+		plaintext          string
+		dataCiphertext     []byte
+		senderIDCiphertext []byte
+		err                error
+	)
+
+	plaintext = "Test Message"
+
+	userKey, err = generateAesKey()
+	if err != nil {
+		panic(err)
+	}
+
+	key, err = generateAesKey()
+	if err != nil {
+		panic(err)
+	}
+
+	dataCiphertext, err = key.aesEncrypt([]byte(plaintext))
+	if err != nil {
+		panic(err)
+	}
+
+	senderIDCiphertext, err = key.aesEncrypt([]byte(primaryUser.ID.String()))
+	if err != nil {
+		panic(err)
+	}
+
+	if i%2 == 0 {
+		senderIDCiphertext, err = key.aesEncrypt([]byte(secondaryUser.ID.String()))
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	keyCiphertext, err = userKey.aesEncrypt(
+		[]byte(base64.StdEncoding.EncodeToString(key.Key)),
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	messageData = Models.MessageData{
+		Data:         base64.StdEncoding.EncodeToString(dataCiphertext),
+		SenderID:     base64.StdEncoding.EncodeToString(senderIDCiphertext),
+		SymmetricKey: base64.StdEncoding.EncodeToString(keyCiphertext),
+	}
+
+	message = Models.Message{
+		MessageData: messageData,
+		SymmetricKey: base64.StdEncoding.EncodeToString(
+			encryptWithPublicKey(userKey.Key, decodedPublicKey),
+		),
+		AssociationKey: primaryUserAssociationKey,
+	}
+
+	err = Database.CreateMessage(&message)
+	if err != nil {
+		return err
+	}
+
+	message = Models.Message{
+		MessageData: messageData,
+		SymmetricKey: base64.StdEncoding.EncodeToString(
+			encryptWithPublicKey(userKey.Key, decodedPublicKey),
+		),
+		AssociationKey: secondaryUserAssociationKey,
+	}
+
+	return Database.CreateMessage(&message)
+}
+
+func seedConversationDetail(key aesKey) (Models.ConversationDetail, error) {
+	var (
+		messageThread     Models.ConversationDetail
+		name              string
+		nameCiphertext    []byte
+		twoUserCiphertext []byte
+		err               error
+	)
+
+	name = "Test Conversation"
+
+	nameCiphertext, err = key.aesEncrypt([]byte(name))
+	if err != nil {
+		panic(err)
+	}
+
+	twoUserCiphertext, err = key.aesEncrypt([]byte("false"))
+	if err != nil {
+		panic(err)
+	}
+
+	messageThread = Models.ConversationDetail{
+		Name:    base64.StdEncoding.EncodeToString(nameCiphertext),
+		TwoUser: base64.StdEncoding.EncodeToString(twoUserCiphertext),
+	}
+
+	err = Database.CreateConversationDetail(&messageThread)
+	return messageThread, err
+}
+
+func seedUserConversation(
+	user Models.User,
+	threadID uuid.UUID,
+	key aesKey,
+) (Models.UserConversation, error) {
+	var (
+		messageThreadUser              Models.UserConversation
+		conversationDetailIDCiphertext []byte
+		adminCiphertext                []byte
+		err                            error
+	)
+
+	conversationDetailIDCiphertext, err = key.aesEncrypt([]byte(threadID.String()))
+	if err != nil {
+		return messageThreadUser, err
+	}
+
+	adminCiphertext, err = key.aesEncrypt([]byte("true"))
+	if err != nil {
+		return messageThreadUser, err
+	}
+
+	messageThreadUser = Models.UserConversation{
+		UserID:               user.ID,
+		ConversationDetailID: base64.StdEncoding.EncodeToString(conversationDetailIDCiphertext),
+		Admin:                base64.StdEncoding.EncodeToString(adminCiphertext),
+		SymmetricKey: base64.StdEncoding.EncodeToString(
+			encryptWithPublicKey(key.Key, decodedPublicKey),
+		),
+	}
+
+	err = Database.CreateUserConversation(&messageThreadUser)
+	return messageThreadUser, err
+}
+
+func seedConversationDetailUser(
+	user Models.User,
+	conversationDetail Models.ConversationDetail,
+	associationKey uuid.UUID,
+	admin bool,
+	key aesKey,
+) (Models.ConversationDetailUser, error) {
+	var (
+		conversationDetailUser Models.ConversationDetailUser
+
+		userIDCiphertext         []byte
+		usernameCiphertext       []byte
+		adminCiphertext          []byte
+		associationKeyCiphertext []byte
+		publicKeyCiphertext      []byte
+
+		adminString = "false"
+
+		err error
+	)
+
+	if admin {
+		adminString = "true"
+	}
+
+	userIDCiphertext, err = key.aesEncrypt([]byte(user.ID.String()))
+	if err != nil {
+		return conversationDetailUser, err
+	}
+
+	usernameCiphertext, err = key.aesEncrypt([]byte(user.Username))
+	if err != nil {
+		return conversationDetailUser, err
+	}
+
+	adminCiphertext, err = key.aesEncrypt([]byte(adminString))
+	if err != nil {
+		return conversationDetailUser, err
+	}
+
+	associationKeyCiphertext, err = key.aesEncrypt([]byte(associationKey.String()))
+	if err != nil {
+		return conversationDetailUser, err
+	}
+
+	publicKeyCiphertext, err = key.aesEncrypt([]byte(user.AsymmetricPublicKey))
+	if err != nil {
+		return conversationDetailUser, err
+	}
+
+	conversationDetailUser = Models.ConversationDetailUser{
+		ConversationDetailID: conversationDetail.ID,
+		UserID:               base64.StdEncoding.EncodeToString(userIDCiphertext),
+		Username:             base64.StdEncoding.EncodeToString(usernameCiphertext),
+		Admin:                base64.StdEncoding.EncodeToString(adminCiphertext),
+		AssociationKey:       base64.StdEncoding.EncodeToString(associationKeyCiphertext),
+		PublicKey:            base64.StdEncoding.EncodeToString(publicKeyCiphertext),
+	}
+
+	err = Database.CreateConversationDetailUser(&conversationDetailUser)
+
+	return conversationDetailUser, err
+}
+
+// SeedMessages seeds messages & conversations for testing
+func SeedMessages() {
+	var (
+		conversationDetail          Models.ConversationDetail
+		key                         aesKey
+		primaryUser                 Models.User
+		primaryUserAssociationKey   uuid.UUID
+		secondaryUser               Models.User
+		secondaryUserAssociationKey uuid.UUID
+		i                           int
+		err                         error
+	)
+
+	key, err = generateAesKey()
+	if err != nil {
+		panic(err)
+	}
+	conversationDetail, err = seedConversationDetail(key)
+
+	primaryUserAssociationKey, err = uuid.NewV4()
+	if err != nil {
+		panic(err)
+	}
+	secondaryUserAssociationKey, err = uuid.NewV4()
+	if err != nil {
+		panic(err)
+	}
+
+	primaryUser, err = Database.GetUserByUsername("testUser")
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = seedUserConversation(
+		primaryUser,
+		conversationDetail.ID,
+		key,
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	secondaryUser, err = Database.GetUserByUsername("ATestUser2")
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = seedUserConversation(
+		secondaryUser,
+		conversationDetail.ID,
+		key,
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = seedConversationDetailUser(
+		primaryUser,
+		conversationDetail,
+		primaryUserAssociationKey,
+		true,
+		key,
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = seedConversationDetailUser(
+		secondaryUser,
+		conversationDetail,
+		secondaryUserAssociationKey,
+		false,
+		key,
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	for i = 0; i <= 20; i++ {
+		err = seedMessage(
+			primaryUser,
+			secondaryUser,
+			primaryUserAssociationKey.String(),
+			secondaryUserAssociationKey.String(),
+			i,
+		)
+		if err != nil {
+			panic(err)
+		}
+	}
+}

Backend/Database/Seeder/Seed.go

@@ -0,0 +1,97 @@
+package Seeder
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+	"log"
+)
+
+const (
+	// Encrypted with "password"
+	encryptedPrivateKey string = `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`
+
+	// Private key for testing server side
+	privateKey string = `-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----`
+
+	publicKey string = `-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyUnEECcVsSsKnxZlx+uE
+J0QVclu3FNuRfjvWcvenak421eK7lq82+PrcZittGT0LzMQy3n4RM011mx2VdT/1
+8YJhKWgVR8B55IWj88woTmvxtfAg6Aja4Mlc4eWt9TqLUwrhpUtW0pEedxMT10Kv
+JzySqjdbXcALJa+HE+tc8qSkpmbCWvdfSGXhy/adf1DF5J304XEfc960eJZeju/n
+Zq2c2g3Sc9/SAt/CucibE4WruYZ3XabLMO+pOK2fShRZW1iUhxb1iAIbLZQldJAs
+HQJjzVTWr80H708VnjdcfbiVLLVZYOtA0QpkYYwvPCu+7FPtY6eHKf1L/Gkhkacr
+ZQIDAQAB
+-----END PUBLIC KEY-----`
+)
+
+var (
+	decodedPublicKey  *rsa.PublicKey
+	decodedPrivateKey *rsa.PrivateKey
+)
+
+func Seed() {
+	var (
+		block  *pem.Block
+		decKey any
+		ok     bool
+		err    error
+	)
+
+	block, _ = pem.Decode([]byte(publicKey))
+	decKey, err = x509.ParsePKIXPublicKey(block.Bytes)
+	if err != nil {
+		panic(err)
+	}
+	decodedPublicKey, ok = decKey.(*rsa.PublicKey)
+	if !ok {
+		panic(errors.New("Invalid decodedPublicKey"))
+	}
+
+	block, _ = pem.Decode([]byte(privateKey))
+	decKey, err = x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		panic(err)
+	}
+	decodedPrivateKey, ok = decKey.(*rsa.PrivateKey)
+	if !ok {
+		panic(errors.New("Invalid decodedPrivateKey"))
+	}
+
+	log.Println("Seeding users...")
+	SeedUsers()
+
+	log.Println("Seeding friend connections...")
+	SeedFriends()
+
+	log.Println("Seeding messages...")
+	SeedMessages()
+}

Backend/Database/Seeder/UserSeeder.go

@@ -0,0 +1,68 @@
+package Seeder
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Auth"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+)
+
+var userNames = []string{
+	"assuredcoot",
+	"quotesteeve",
+	"blueberriessiemens",
+	"eliteexaggerate",
+	"twotrice",
+	"moderagged",
+	"duleelderly",
+	"stringdetailed",
+	"nodesanymore",
+	"sacredpolitical",
+	"pajamasenergy",
+}
+
+func createUser(username string) (Models.User, error) {
+	var (
+		userData Models.User
+		password string
+		err      error
+	)
+
+	password, err = Auth.HashPassword("password")
+	if err != nil {
+		return Models.User{}, err
+	}
+
+	userData = Models.User{
+		Username:             username,
+		Password:             password,
+		AsymmetricPrivateKey: encryptedPrivateKey,
+		AsymmetricPublicKey:  publicKey,
+	}
+
+	err = Database.CreateUser(&userData)
+	return userData, err
+}
+
+func SeedUsers() {
+	var (
+		i   int
+		err error
+	)
+
+	// Seed users used for conversation seeding
+	_, err = createUser("testUser")
+	if err != nil {
+		panic(err)
+	}
+	_, err = createUser("ATestUser2")
+	if err != nil {
+		panic(err)
+	}
+
+	for i = 0; i <= 10; i++ {
+		_, err = createUser(userNames[i])
+		if err != nil {
+			panic(err)
+		}
+	}
+}

Backend/Database/Seeder/encryption.go

@@ -0,0 +1,188 @@
+package Seeder
+
+// THIS FILE IS ONLY USED FOR SEEDING DATA DURING DEVELOPMENT
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/hmac"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha256"
+	"encoding/base64"
+	"fmt"
+	"hash"
+
+	"golang.org/x/crypto/pbkdf2"
+)
+
+type aesKey struct {
+	Key []byte
+	Iv  []byte
+}
+
+func (key aesKey) encode() string {
+	return base64.StdEncoding.EncodeToString(key.Key)
+}
+
+// Appends padding.
+func pkcs7Padding(data []byte, blocklen int) ([]byte, error) {
+	var (
+		padlen int = 1
+		pad    []byte
+	)
+	if blocklen <= 0 {
+		return nil, fmt.Errorf("invalid blocklen %d", blocklen)
+	}
+
+	for ((len(data) + padlen) % blocklen) != 0 {
+		padlen = padlen + 1
+	}
+
+	pad = bytes.Repeat([]byte{byte(padlen)}, padlen)
+	return append(data, pad...), nil
+}
+
+// pkcs7strip remove pkcs7 padding
+func pkcs7strip(data []byte, blockSize int) ([]byte, error) {
+	var (
+		length int
+		padLen int
+		ref    []byte
+	)
+
+	length = len(data)
+	if length == 0 {
+		return nil, fmt.Errorf("pkcs7: Data is empty")
+	}
+
+	if (length % blockSize) != 0 {
+		return nil, fmt.Errorf("pkcs7: Data is not block-aligned")
+	}
+
+	padLen = int(data[length-1])
+	ref = bytes.Repeat([]byte{byte(padLen)}, padLen)
+
+	if padLen > blockSize || padLen == 0 || !bytes.HasSuffix(data, ref) {
+		return nil, fmt.Errorf("pkcs7: Invalid padding")
+	}
+
+	return data[:length-padLen], nil
+}
+
+func generateAesKey() (aesKey, error) {
+	var (
+		saltBytes []byte = []byte{}
+		password  []byte
+		seed      []byte
+		iv        []byte
+		err       error
+	)
+
+	password = make([]byte, 64)
+	_, err = rand.Read(password)
+	if err != nil {
+		return aesKey{}, err
+	}
+
+	seed = make([]byte, 64)
+	_, err = rand.Read(seed)
+	if err != nil {
+		return aesKey{}, err
+	}
+
+	iv = make([]byte, 16)
+	_, err = rand.Read(iv)
+	if err != nil {
+		return aesKey{}, err
+	}
+
+	return aesKey{
+		Key: pbkdf2.Key(
+			password,
+			saltBytes,
+			1000,
+			32,
+			func() hash.Hash { return hmac.New(sha256.New, seed) },
+		),
+		Iv: iv,
+	}, nil
+}
+
+func (key aesKey) aesEncrypt(plaintext []byte) ([]byte, error) {
+	var (
+		bPlaintext []byte
+		ciphertext []byte
+		block      cipher.Block
+		err        error
+	)
+
+	bPlaintext, err = pkcs7Padding(plaintext, 16)
+
+	block, err = aes.NewCipher(key.Key)
+	if err != nil {
+		return []byte{}, err
+	}
+
+	ciphertext = make([]byte, len(bPlaintext))
+	mode := cipher.NewCBCEncrypter(block, key.Iv)
+	mode.CryptBlocks(ciphertext, bPlaintext)
+
+	ciphertext = append(key.Iv, ciphertext...)
+
+	return ciphertext, nil
+}
+
+func (key aesKey) aesDecrypt(ciphertext []byte) ([]byte, error) {
+	var (
+		plaintext []byte
+		iv        []byte
+		block     cipher.Block
+		err       error
+	)
+
+	iv = ciphertext[:aes.BlockSize]
+	plaintext = ciphertext[aes.BlockSize:]
+
+	block, err = aes.NewCipher(key.Key)
+	if err != nil {
+		return []byte{}, err
+	}
+
+	decMode := cipher.NewCBCDecrypter(block, iv)
+	decMode.CryptBlocks(plaintext, plaintext)
+
+	return plaintext, nil
+}
+
+// EncryptWithPublicKey encrypts data with public key
+func encryptWithPublicKey(msg []byte, pub *rsa.PublicKey) []byte {
+	var (
+		hash hash.Hash
+	)
+
+	hash = sha256.New()
+	ciphertext, err := rsa.EncryptOAEP(hash, rand.Reader, pub, msg, nil)
+	if err != nil {
+		panic(err)
+	}
+	return ciphertext
+}
+
+// DecryptWithPrivateKey decrypts data with private key
+func decryptWithPrivateKey(ciphertext []byte, priv *rsa.PrivateKey) ([]byte, error) {
+	var (
+		hash      hash.Hash
+		plaintext []byte
+		err       error
+	)
+
+	hash = sha256.New()
+
+	plaintext, err = rsa.DecryptOAEP(hash, rand.Reader, priv, ciphertext, nil)
+	if err != nil {
+		return plaintext, err
+	}
+	return plaintext, nil
+}

Backend/Database/Sessions.go

@@ -0,0 +1,38 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm/clause"
+)
+
+func GetSessionById(id string) (Models.Session, error) {
+	var (
+		session Models.Session
+		err     error
+	)
+
+	err = DB.Preload(clause.Associations).
+		First(&session, "id = ?", id).
+		Error
+
+	return session, err
+}
+
+func CreateSession(session *Models.Session) error {
+	var (
+		err error
+	)
+
+	err = DB.Create(session).Error
+
+	return err
+}
+
+func DeleteSession(session *Models.Session) error {
+	return DB.Delete(session).Error
+}
+
+func DeleteSessionById(id string) error {
+	return DB.Delete(&Models.Session{}, id).Error
+}

Backend/Database/UserConversations.go

@@ -0,0 +1,91 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+func GetUserConversationById(id string) (Models.UserConversation, error) {
+	var (
+		message Models.UserConversation
+		err     error
+	)
+
+	err = DB.First(&message, "id = ?", id).
+		Error
+
+	return message, err
+}
+
+func GetUserConversationsByUserId(id string) ([]Models.UserConversation, error) {
+	var (
+		conversations []Models.UserConversation
+		err           error
+	)
+
+	err = DB.Find(&conversations, "user_id = ?", id).
+		Error
+
+	return conversations, err
+}
+
+func CreateUserConversation(userConversation *Models.UserConversation) error {
+	var err error
+
+	err = DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(userConversation).
+		Error
+
+	return err
+}
+
+func CreateUserConversations(userConversations *[]Models.UserConversation) error {
+	var err error
+
+	err = DB.Create(userConversations).
+		Error
+
+	return err
+}
+
+func UpdateUserConversation(userConversation *Models.UserConversation) error {
+	var err error
+
+	err = DB.Model(Models.UserConversation{}).
+		Updates(userConversation).
+		Error
+
+	return err
+}
+
+func UpdateUserConversations(userConversations *[]Models.UserConversation) error {
+	var err error
+
+	err = DB.Model(Models.UserConversation{}).
+		Updates(userConversations).
+		Error
+
+	return err
+}
+
+func UpdateOrCreateUserConversations(userConversations *[]Models.UserConversation) error {
+	var err error
+
+	err = DB.Model(Models.UserConversation{}).
+		Clauses(clause.OnConflict{
+			Columns:   []clause.Column{{Name: "id"}},
+			DoUpdates: clause.AssignmentColumns([]string{"admin"}),
+		}).
+		Create(userConversations).
+		Error
+
+	return err
+}
+
+func DeleteUserConversation(userConversation *Models.UserConversation) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(userConversation).
+		Error
+}

Backend/Database/Users.go

@@ -0,0 +1,95 @@
+package Database
+
+import (
+	"errors"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+func GetUserById(id string) (Models.User, error) {
+	var (
+		user Models.User
+		err  error
+	)
+
+	err = DB.Preload(clause.Associations).
+		First(&user, "id = ?", id).
+		Error
+
+	return user, err
+}
+
+func GetUserByUsername(username string) (Models.User, error) {
+	var (
+		user Models.User
+		err  error
+	)
+
+	err = DB.Preload(clause.Associations).
+		First(&user, "username = ?", username).
+		Error
+
+	return user, err
+}
+
+func CheckUniqueUsername(username string) error {
+	var (
+		exists bool
+		err    error
+	)
+
+	err = DB.Model(Models.User{}).
+		Select("count(*) > 0").
+		Where("username = ?", username).
+		Find(&exists).
+		Error
+
+	if err != nil {
+		return err
+	}
+
+	if exists {
+		return errors.New("Invalid username")
+	}
+
+	return nil
+}
+
+func CreateUser(user *Models.User) error {
+	var err error
+
+	err = DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(user).
+		Error
+
+	return err
+}
+
+func UpdateUser(id string, user *Models.User) error {
+	var err error
+	err = DB.Model(&user).
+		Omit("id").
+		Where("id = ?", id).
+		Updates(user).
+		Error
+
+	if err != nil {
+		return err
+	}
+
+	err = DB.Model(Models.User{}).
+		Where("id = ?", id).
+		First(user).
+		Error
+
+	return err
+}
+
+func DeleteUser(user *Models.User) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(user).
+		Error
+}

Backend/Models/Base.go

@@ -0,0 +1,31 @@
+package Models
+
+import (
+	"github.com/gofrs/uuid"
+	"gorm.io/gorm"
+)
+
+// Base contains common columns for all tables.
+type Base struct {
+	ID uuid.UUID `gorm:"type:uuid;primary_key;" json:"id"`
+}
+
+// BeforeCreate will set a UUID rather than numeric ID.
+func (base *Base) BeforeCreate(tx *gorm.DB) error {
+	var (
+		id  uuid.UUID
+		err error
+	)
+
+	if !base.ID.IsNil() {
+		return nil
+	}
+
+	id, err = uuid.NewV4()
+	if err != nil {
+		return err
+	}
+
+	base.ID = id
+	return nil
+}

Backend/Models/Conversations.go

@@ -0,0 +1,35 @@
+package Models
+
+import (
+	"github.com/gofrs/uuid"
+)
+
+// ConversationDetail stores the name for the conversation
+type ConversationDetail struct {
+	Base
+	Name    string                   `gorm:"not null" json:"name"` // Stored encrypted
+	Users   []ConversationDetailUser `                json:"users"`
+	TwoUser string                   `gorm:"not null" json:"two_user"`
+}
+
+// ConversationDetailUser all users associated with a customer
+type ConversationDetailUser struct {
+	Base
+	ConversationDetailID uuid.UUID          `gorm:"not null" json:"conversation_detail_id"`
+	ConversationDetail   ConversationDetail `gorm:"not null" json:"conversation"`
+	UserID               string             `gorm:"not null" json:"user_id"`         // Stored encrypted
+	Username             string             `gorm:"not null" json:"username"`        // Stored encrypted
+	Admin                string             `gorm:"not null" json:"admin"`           // Stored encrypted
+	AssociationKey       string             `gorm:"not null" json:"association_key"` // Stored encrypted
+	PublicKey            string             `gorm:"not null" json:"public_key"`      // Stored encrypted
+}
+
+// UserConversation Used to link the current user to their conversations
+type UserConversation struct {
+	Base
+	UserID               uuid.UUID `gorm:"type:uuid;column:user_id;not null;" json:"user_id"`
+	User                 User      `                                          json:"user"`
+	ConversationDetailID string    `gorm:"not null"                           json:"conversation_detail_id"` // Stored encrypted
+	Admin                string    `gorm:"not null"                           json:"admin"`                  // Bool if user is admin of thread, stored encrypted
+	SymmetricKey         string    `gorm:"not null"                           json:"symmetric_key"`          // Stored encrypted
+}

Backend/Models/Friends.go

@@ -0,0 +1,19 @@
+package Models
+
+import (
+	"database/sql"
+
+	"github.com/gofrs/uuid"
+)
+
+// FriendRequest Set with Friend being the requestee, and RequestFromID being the requester
+type FriendRequest struct {
+	Base
+	UserID                    uuid.UUID    `gorm:"type:uuid;column:user_id;not null;" json:"user_id"`
+	User                      User         `                                          json:"user"`
+	FriendID                  string       `gorm:"not null"                           json:"friend_id"`             // Stored encrypted
+	FriendUsername            string       `                                          json:"friend_username"`       // Stored encrypted
+	FriendPublicAsymmetricKey string       `                                          json:"asymmetric_public_key"` // Stored encrypted
+	SymmetricKey              string       `gorm:"not null"                           json:"symmetric_key"`         // Stored encrypted
+	AcceptedAt                sql.NullTime `                                          json:"accepted_at"`
+}

Backend/Models/Messages.go

@@ -0,0 +1,24 @@
+package Models
+
+import (
+	"time"
+
+	"github.com/gofrs/uuid"
+)
+
+// TODO: Add support for images
+type MessageData struct {
+	Base
+	Data         string `gorm:"not null" json:"data"`          // Stored encrypted
+	SenderID     string `gorm:"not null" json:"sender_id"`     // Stored encrypted
+	SymmetricKey string `gorm:"not null" json:"symmetric_key"` // Stored encrypted
+}
+
+type Message struct {
+	Base
+	MessageDataID  uuid.UUID   `json:"message_data_id"`
+	MessageData    MessageData `json:"message_data"`
+	SymmetricKey   string      `json:"symmetric_key"   gorm:"not null"` // Stored encrypted
+	AssociationKey string      `json:"association_key" gorm:"not null"` // TODO: This links all encrypted messages for a user in a thread together. Find a way to fix this
+	CreatedAt      time.Time   `json:"created_at"      gorm:"not null"`
+}

Backend/Models/Sessions.go

@@ -0,0 +1,18 @@
+package Models
+
+import (
+	"time"
+
+	"github.com/gofrs/uuid"
+)
+
+func (s Session) IsExpired() bool {
+	return s.Expiry.Before(time.Now())
+}
+
+type Session struct {
+	Base
+	UserID uuid.UUID `gorm:"type:uuid;column:user_id;not null;"`
+	User   User
+	Expiry time.Time
+}

Backend/Models/Users.go

@@ -0,0 +1,23 @@
+package Models
+
+import (
+	"gorm.io/gorm"
+)
+
+// Prevent updating the email if it has not changed
+// This stops a unique constraint error
+func (u *User) BeforeUpdate(tx *gorm.DB) (err error) {
+	if !tx.Statement.Changed("Username") {
+		tx.Statement.Omit("Username")
+	}
+	return nil
+}
+
+type User struct {
+	Base
+	Username             string `gorm:"not null;unique" json:"username"`
+	Password             string `gorm:"not null"        json:"password"`
+	ConfirmPassword      string `gorm:"-"               json:"confirm_password"`
+	AsymmetricPrivateKey string `gorm:"not null"        json:"asymmetric_private_key"` // Stored encrypted
+	AsymmetricPublicKey  string `gorm:"not null"        json:"asymmetric_public_key"`
+}

Backend/Util/Bytes.go

@@ -0,0 +1,21 @@
+package Util
+
+import (
+	"bytes"
+	"encoding/gob"
+)
+
+func ToBytes(key interface{}) ([]byte, error) {
+	var (
+		buf bytes.Buffer
+		enc *gob.Encoder
+		err error
+	)
+	enc = gob.NewEncoder(&buf)
+	err = enc.Encode(key)
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+
+}

Backend/Util/Strings.go

@@ -0,0 +1,21 @@
+package Util
+
+import (
+	"math/rand"
+)
+
+var (
+	letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+)
+
+func RandomString(n int) string {
+	var (
+		b []rune
+		i int
+	)
+	b = make([]rune, n)
+	for i = range b {
+		b[i] = letterRunes[rand.Intn(len(letterRunes))]
+	}
+	return string(b)
+}

Backend/Util/UserHelper.go

@@ -0,0 +1,51 @@
+package Util
+
+import (
+	"errors"
+	"log"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"github.com/gorilla/mux"
+)
+
+func GetUserId(r *http.Request) (string, error) {
+	var (
+		urlVars map[string]string
+		id      string
+		ok      bool
+	)
+
+	urlVars = mux.Vars(r)
+	id, ok = urlVars["userID"]
+	if !ok {
+		return id, errors.New("Could not get id")
+	}
+	return id, nil
+}
+
+func GetUserById(w http.ResponseWriter, r *http.Request) (Models.User, error) {
+	var (
+		postData Models.User
+		id       string
+		err      error
+	)
+
+	id, err = GetUserId(r)
+	if err != nil {
+		log.Printf("Error encountered getting id\n")
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return postData, err
+	}
+
+	postData, err = Database.GetUserById(id)
+	if err != nil {
+		log.Printf("Could not find user with id %s\n", id)
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return postData, err
+	}
+
+	return postData, nil
+}

Backend/go.mod

@@ -0,0 +1,26 @@
+module git.tovijaeschke.xyz/tovi/Envelope/Backend
+
+go 1.18
+
+require (
+	github.com/Kangaroux/go-map-schema v0.6.1
+	github.com/gofrs/uuid v4.2.0+incompatible
+	github.com/gorilla/mux v1.8.0
+	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
+	gorm.io/driver/postgres v1.3.4
+	gorm.io/gorm v1.23.4
+)
+
+require (
+	github.com/jackc/chunkreader/v2 v2.0.1 // indirect
+	github.com/jackc/pgconn v1.11.0 // indirect
+	github.com/jackc/pgio v1.0.0 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgproto3/v2 v2.2.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b // indirect
+	github.com/jackc/pgtype v1.10.0 // indirect
+	github.com/jackc/pgx/v4 v4.15.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.4 // indirect
+	golang.org/x/text v0.3.7 // indirect
+)

Backend/go.sum

@@ -0,0 +1,192 @@
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Kangaroux/go-map-schema v0.6.1 h1:jXpOzi7kNFC6M8QSvJuI7xeDxObBrVHwA3D6vSrxuG4=
+github.com/Kangaroux/go-map-schema v0.6.1/go.mod h1:56jN+6h/N8Pmn5D+JL9gREOvZTlVEAvXtXyLd/NRjh4=
+github.com/Masterminds/semver/v3 v3.1.1 h1:hLg3sBzpNErnxhQtUy/mmLR2I9foDujNK030IGemrRc=
+github.com/Masterminds/semver/v3 v3.1.1/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
+github.com/cockroachdb/apd v1.1.0 h1:3LFP3629v+1aKXU5Q37mxmRxX/pIu1nijXydLShEq5I=
+github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
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Backend/main.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database/Seeder"
+
+	"github.com/gorilla/mux"
+)
+
+var seed bool
+
+func init() {
+	Database.Init()
+
+	flag.BoolVar(&seed, "seed", false, "Seed database for development")
+
+	flag.Parse()
+}
+
+func main() {
+	var (
+		router *mux.Router
+		err    error
+	)
+
+	if seed {
+		Seeder.Seed()
+		return
+	}
+
+	router = mux.NewRouter()
+
+	Api.InitAPIEndpoints(router)
+
+	log.Println("Listening on port :8080")
+	err = http.ListenAndServe(":8080", router)
+	if err != nil {
+		panic(err)
+	}
+}

README.md

@@ -1,3 +1,18 @@
 # Envelope
 
 Encrypted messaging app
+
+## TODO
+
+[x] Fix adding users to conversations
+[x] Fix users recieving messages
+[x] Fix the admin checks on conversation settings page
+[x] Fix sending messages in a conversation that includes users that are not the current users friend
+[x] Add admin checks to conversation settings page
+[ ] Add admin checks on backend
+[ ] Add errors to login / signup page
+[ ] Add errors when updating conversations
+[ ] Refactor the update conversations function
+[ ] Finish the friends list page
+[ ] Allow adding friends
+[ ] Finish the disappearing messages functionality

mobile/.gitignore

@@ -0,0 +1,46 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+lib/generated_plugin_registrant.dart
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

mobile/.metadata

@@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: c860cba910319332564e1e9d470a17074c1f2dfd
+  channel: stable
+
+project_type: app

mobile/README.md

@@ -0,0 +1,16 @@
+# mobile
+
+A new Flutter project.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://flutter.dev/docs/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://flutter.dev/docs/cookbook)
+
+For help getting started with Flutter, view our
+[online documentation](https://flutter.dev/docs), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.

mobile/analysis_options.yaml

@@ -0,0 +1,30 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+    prefer_single_quotes: true
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

mobile/android/.gitignore

@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

mobile/android/app/build.gradle

@@ -0,0 +1,68 @@
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion flutter.compileSdkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.example.mobile"
+        minSdkVersion 20
+        targetSdkVersion flutter.targetSdkVersion
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}

mobile/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.mobile">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

mobile/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,35 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.mobile">
+   <uses-permission android:name="android.permission.INTERNET"/>
+   <application
+        android:label="Envelope"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+</manifest>

mobile/android/app/src/main/kotlin/com/example/mobile/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.example.mobile
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}

mobile/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

mobile/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

mobile/android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             Flutter draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

mobile/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             Flutter draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

mobile/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.mobile">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

mobile/android/build.gradle

@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.6.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

mobile/android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true

mobile/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Fri Jun 23 08:50:38 CEST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

mobile/android/settings.gradle

@@ -0,0 +1,11 @@
+include ':app'
+
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
+
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

mobile/ios/.gitignore

@@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3

mobile/ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>9.0</string>
+</dict>
+</plist>

mobile/ios/Flutter/Debug.xcconfig

@@ -0,0 +1 @@
+#include "Generated.xcconfig"

mobile/ios/Flutter/Release.xcconfig

@@ -0,0 +1 @@
+#include "Generated.xcconfig"

mobile/ios/Runner.xcodeproj/project.pbxproj

@@ -0,0 +1,481 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 50;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
+		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
+		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
+		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		9705A1C41CF9048500538489 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
+		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
+		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
+		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
+		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
+		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
+		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		97C146FB1CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
+		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
+		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
+		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		97C146EB1CF9000F007C117D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		9740EEB11CF90186004384FC /* Flutter */ = {
+			isa = PBXGroup;
+			children = (
+				3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */,
+				9740EEB21CF90195004384FC /* Debug.xcconfig */,
+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				9740EEB31CF90195004384FC /* Generated.xcconfig */,
+			);
+			name = Flutter;
+			sourceTree = "<group>";
+		};
+		97C146E51CF9000F007C117D = {
+			isa = PBXGroup;
+			children = (
+				9740EEB11CF90186004384FC /* Flutter */,
+				97C146F01CF9000F007C117D /* Runner */,
+				97C146EF1CF9000F007C117D /* Products */,
+			);
+			sourceTree = "<group>";
+		};
+		97C146EF1CF9000F007C117D /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				97C146EE1CF9000F007C117D /* Runner.app */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		97C146F01CF9000F007C117D /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				97C146FA1CF9000F007C117D /* Main.storyboard */,
+				97C146FD1CF9000F007C117D /* Assets.xcassets */,
+				97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,
+				97C147021CF9000F007C117D /* Info.plist */,
+				1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,
+				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
+				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
+				74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,
+			);
+			path = Runner;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		97C146ED1CF9000F007C117D /* Runner */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
+			buildPhases = (
+				9740EEB61CF901F6004384FC /* Run Script */,
+				97C146EA1CF9000F007C117D /* Sources */,
+				97C146EB1CF9000F007C117D /* Frameworks */,
+				97C146EC1CF9000F007C117D /* Resources */,
+				9705A1C41CF9048500538489 /* Embed Frameworks */,
+				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Runner;
+			productName = Runner;
+			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		97C146E61CF9000F007C117D /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				LastUpgradeCheck = 1300;
+				ORGANIZATIONNAME = "";
+				TargetAttributes = {
+					97C146ED1CF9000F007C117D = {
+						CreatedOnToolsVersion = 7.3.1;
+						LastSwiftMigration = 1100;
+					};
+				};
+			};
+			buildConfigurationList = 97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */;
+			compatibilityVersion = "Xcode 9.3";
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+				Base,
+			);
+			mainGroup = 97C146E51CF9000F007C117D;
+			productRefGroup = 97C146EF1CF9000F007C117D /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				97C146ED1CF9000F007C117D /* Runner */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		97C146EC1CF9000F007C117D /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */,
+				3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */,
+				97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,
+				97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXShellScriptBuildPhase section */
+		3B06AD1E1E4923F5004D2608 /* Thin Binary */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Thin Binary";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
+		};
+		9740EEB61CF901F6004384FC /* Run Script */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Run Script";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
+		};
+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		97C146EA1CF9000F007C117D /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */,
+				1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin PBXVariantGroup section */
+		97C146FA1CF9000F007C117D /* Main.storyboard */ = {
+			isa = PBXVariantGroup;
+			children = (
+				97C146FB1CF9000F007C117D /* Base */,
+			);
+			name = Main.storyboard;
+			sourceTree = "<group>";
+		};
+		97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */ = {
+			isa = PBXVariantGroup;
+			children = (
+				97C147001CF9000F007C117D /* Base */,
+			);
+			name = LaunchScreen.storyboard;
+			sourceTree = "<group>";
+		};
+/* End PBXVariantGroup section */
+
+/* Begin XCBuildConfiguration section */
+		249021D3217E4FDB00AE95B9 /* Profile */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Profile;
+		};
+		249021D4217E4FDB00AE95B9 /* Profile */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.mobile;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Profile;
+		};
+		97C147031CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				MTL_ENABLE_DEBUG_INFO = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				SDKROOT = iphoneos;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		97C147041CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		97C147061CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.mobile;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Debug;
+		};
+		97C147071CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.mobile;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147031CF9000F007C117D /* Debug */,
+				97C147041CF9000F007C117D /* Release */,
+				249021D3217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147061CF9000F007C117D /* Debug */,
+				97C147071CF9000F007C117D /* Release */,
+				249021D4217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 97C146E61CF9000F007C117D /* Project object */;
+}

mobile/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

mobile/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

mobile/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

mobile/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1300"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

mobile/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>

mobile/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

mobile/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

mobile/ios/Runner/AppDelegate.swift

@@ -0,0 +1,13 @@
+import UIKit
+import Flutter
+
+@UIApplicationMain
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+}

mobile/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}