Encrypted messaging app
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  1. import 'dart:async';
  2. import 'package:flutter/widgets.dart';
  3. import 'package:path/path.dart';
  4. import 'package:sqflite/sqflite.dart';
  5. Future<void> deleteDb() async {
  6. final path = join(await getDatabasesPath(), 'envelope.db');
  7. deleteDatabase(path);
  8. }
  9. Future<Database> getDatabaseConnection() async {
  10. WidgetsFlutterBinding.ensureInitialized();
  11. final path = join(await getDatabasesPath(), 'envelope.db');
  12. final database = openDatabase(
  13. path,
  14. onCreate: (db, version) async {
  15. await db.execute(
  16. '''
  17. CREATE TABLE IF NOT EXISTS friends(
  18. id TEXT PRIMARY KEY,
  19. user_id TEXT,
  20. username TEXT,
  21. friend_id TEXT,
  22. symmetric_key TEXT,
  23. asymmetric_public_key TEXT,
  24. accepted_at TEXT
  25. );
  26. ''');
  27. await db.execute(
  28. '''
  29. CREATE TABLE IF NOT EXISTS conversations(
  30. id TEXT PRIMARY KEY,
  31. user_id TEXT,
  32. symmetric_key TEXT,
  33. admin INTEGER,
  34. name TEXT,
  35. two_user INTEGER,
  36. status INTEGER,
  37. is_read INTEGER
  38. );
  39. ''');
  40. await db.execute(
  41. '''
  42. CREATE TABLE IF NOT EXISTS conversation_users(
  43. id TEXT PRIMARY KEY,
  44. user_id TEXT,
  45. conversation_id TEXT,
  46. username TEXT,
  47. association_key TEXT,
  48. admin INTEGER,
  49. asymmetric_public_key TEXT
  50. );
  51. ''');
  52. await db.execute(
  53. '''
  54. CREATE TABLE IF NOT EXISTS messages(
  55. id TEXT PRIMARY KEY,
  56. symmetric_key TEXT,
  57. user_symmetric_key TEXT,
  58. data TEXT,
  59. sender_id TEXT,
  60. sender_username TEXT,
  61. association_key TEXT,
  62. created_at TEXT,
  63. failed_to_send INTEGER
  64. );
  65. ''');
  66. },
  67. version: 2,
  68. );
  69. return database;
  70. }