crud

lib/database/database.dart

@@ -1,32 +1,39 @@
 import 'package:path/path.dart';
+import 'package:sqflite/sqflite.dart';
 
 // Models
 import 'package:progetto_m335_flutter/model/note.dart';
 import 'package:progetto_m335_flutter/model/promemoria.dart';
-import 'package:sqflite/sqflite.dart';
 
 class NoteDatabase {
   static final NoteDatabase instance = NoteDatabase._init();
   static Database? _database;
 
+  // Zero args constructor needed to extend this class
+  NoteDatabase();
+
   NoteDatabase._init();
 
   Future<Database> get database async {
     if (_database != null) return _database!;
+
     _database = await _initDB('note.db');
     return _database!;
   }
 
   Future<Database> _initDB(String filePath) async {
-    print("Initializing database");
     final databasePath = await getDatabasesPath();
 
     final path = join(databasePath, filePath);
-
     return await openDatabase(path, version: 1, onCreate: _createDB);
   }
 
   Future _createDB(Database database, int version) async {
+    if (await isDatabaseExists()) {
+      print("Database already created");
+      deleteDatabase();
+      print("Database deleted");
+    }
 
     await database.execute('''CREATE TABLE promemoria (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -56,6 +63,23 @@ class NoteDatabase {
   }
 
   Future fillDemoData(Database database, int version) async {
+
+    var nota = Note();
+    nota.setTitle("Nota 1");
+    nota.setCreationDate("2023-09-56");
+    nota.setLastModificationDate("2023-09-56");
+    nota.setArrayPromemoria("1,2,3,4,5");
+    nota.setDescription("Questo è un esempio di nota 1.");
+
+    await createNote(database, nota);
+
+    print(await readNote(1));
+
+    nota.setDescription("ciao");
+    await updateNote (nota);
+
+    print(await readNote (1));
+
     // Add fake categories
     await database.execute('''
   INSERT INTO note (
@@ -68,7 +92,6 @@ class NoteDatabase {
     'Nota 2',
     '2023-09-28',
     '2023-09-28',
-    '',
     'Questo è un esempio di nota 2.'
   )
 ''');
@@ -84,7 +107,6 @@ class NoteDatabase {
     'Nota 2',
     '2023-09-28',
     '2023-09-28',
-    '',
     'Questo è un esempio di nota 2.'
   )
 ''');
@@ -105,7 +127,6 @@ class NoteDatabase {
     '2023-09-27',
     '2023-09-27',
     '2023-10-05',
-    '',
     'Questo è un esempio di promemoria 1.',
     'Alta',
     'Rosso'
@@ -128,7 +149,6 @@ class NoteDatabase {
     '2023-09-28',
     '2023-09-28',
     '2023-10-10',
-    '',
     'Questo è un esempio di promemoria 2.',
     'Media',
     'Verde'
@@ -156,34 +176,19 @@ class NoteDatabase {
   }
 
   Future<void> deleteDatabase() async {
-    try {
     final databasePath = await getDatabasesPath();
     final path = join(databasePath, 'note.db');
     databaseFactory.deleteDatabase(path);
-    } catch (error) {
-      throw Exception('DbBase.deleteDatabase: $error');
-    }
   }
 
-  Future<void> createNote(Database database, Note note) async {
+  Future<bool> isDatabaseExists() async {
-    await database.execute('''
+    final databasePath = await getDatabasesPath();
-      INSERT INTO note (
+    final path = join(databasePath, 'note.db');
-        title,
+    // Apre il database in modalità sola lettura.
-        creationDate,
+    Database database = await openDatabase(path, readOnly: true);
-        lastModificationDate,
-        arrayPromemoria,
-        description,
 
-      ) VALUES (
+    // Restituisce true se il database è stato aperto correttamente, altrimenti false.
-        '$note.title}',
+    return database.isOpen;
-        '$note.creationDate',
-        '$note.lastModificationDate',
-        '$note.arrayPromemoria.toString()',
-        '$note.description',
-      )
-    ''');
-
-    print('note $note.title inserted');
   }
 
   Future<List<Map>> selectAllPromemoria() async {
@@ -202,29 +207,23 @@ class NoteDatabase {
     return maps;
   }
 
+  Future<void> createNote(Database database, Note note) async {
+    await database.insert(
+      'note',
+      note.toMap(),
+      conflictAlgorithm: ConflictAlgorithm.replace,
+    );
+
+    print('note $note.title inserted');
+  }
+
   Future<void> createPromemoria(
       Database database, Promemoria promemoria) async {
-    await database.execute('''
+    await database.insert(
-      INSERT INTO promemoria (
+      'promemoria',
-        title,
+      promemoria.toMap(),
-        creationDate,
+      conflictAlgorithm: ConflictAlgorithm.replace,
-        lastModificationDate,
+    );
-        expirationDate,
-        arrayPromemoria,
-        description,
-        priority,
-        color
-      ) VALUES (
-        '$promemoria.title',
-        '$promemoria.creationDate',
-        '$promemoria.lastModificationDate',
-        '$promemoria.expirationDate',
-        '$promemoria.arrayPromemoria.toString()',
-        '$promemoria.description',
-        '$promemoria.priority',
-        '$promemoria.color'
-      )
-    ''');
 
     print('promemoria $promemoria.title inserted');
   }
@@ -244,11 +243,17 @@ class NoteDatabase {
     return results.first;
   }
 
-//  Future<void> updatePromemoria(Promemoria promemoria) async {
+  Future<void> updatePromemoria(Promemoria promemoria) async {
-//  final db = await database;
+    final db = await database;
 
-//await db.update('promemoria', promemoria, where: 'id = ?',
+    await db.update('promemoria', promemoria.toMap(),
-// Pass the Dog's id as a whereArg to prevent SQL injection.
+        where: 'id = ?', whereArgs: [promemoria.getId()]);
-//  whereArgs: [dog.id],)
+  }
-//}
+
+  Future<void> updateNote(Note note) async {
+    final db = await database;
+
+    await db.update('note', note.toMap(),
+        where: 'id = ?', whereArgs: [note.getId()]);
+  }
 }

lib/model/note.dart

@@ -9,4 +9,63 @@ class Note extends BaseEntity {
   static String lastModificationDate = BaseEntity.getLastEditDate;
   static String arrayPromemoria = '';
   static String description = '';
+
+  Map<String, dynamic> toMap() {
+    return {
+      'id': id,
+      'title': title,
+      'creationDate': creationDate,
+      'lastModificationDate': lastModificationDate,
+      'arrayPromemoria': arrayPromemoria,
+      'description': description
+    };
+  }
+
+  String getId() {
+    return id;
+  }
+
+  void setId(String id) {
+    id = id;
+  }
+
+  String getTitle() {
+    return title;
+  }
+
+  void setTitle(String title) {
+    title = title;
+  }
+
+  String getCreationDate() {
+    return creationDate;
+  }
+
+  void setCreationDate(String creationDate) {
+    creationDate = creationDate;
+  }
+
+  String getLastModificationDate() {
+    return lastModificationDate;
+  }
+
+  void setLastModificationDate(String lastModificationDate) {
+    lastModificationDate = lastModificationDate;
+  }
+
+  String getArrayPromemoria() {
+    return arrayPromemoria;
+  }
+
+  void setArrayPromemoria(String arrayPromemoria) {
+    arrayPromemoria = arrayPromemoria;
+  }
+
+  String getDescription() {
+    return description;
+  }
+
+  void setDescription(String description) {
+    description = description;
+  }
 }

lib/model/promemoria.dart

@@ -13,6 +13,85 @@ class Promemoria extends BaseEntity {
   static String arrayPromemoria = '';
   static String description = '';
   static Priority priority = Priority.none;
-
   static Color color = Color.none;
+
+  Map<String, dynamic> toMap() {
+    return {
+      'id': id,
+      'title': title,
+      'creationDate': creationDate,
+      'lastModificationDate': lastModificationDate,
+      'expirationDate': expirationDate,
+      'arrayPromemoria': arrayPromemoria,
+      'description': description,
+      'priority': priority,
+      'color': color,
+    };
+  }
+
+  String getId(){
+    return id;
+  }
+
+  void setId(String id) {
+    id = id;
+  }
+
+  String getTitle() {
+    return title;
+  }
+
+  void setTitle(String title) {
+    title = title;
+  }
+
+  String getCreationDate() {
+    return creationDate;
+  }
+
+  void setCreationDate(String creationDate) {
+    creationDate = creationDate;
+  }
+
+  String getLastModificationDate() {
+    return lastModificationDate;
+  }
+
+  void setLastModificationDate(String lastModificationDate) {
+    lastModificationDate = lastModificationDate;
+  }
+
+  String getExpirationDate() {
+    return expirationDate;
+  }
+
+  void setExpirationDate(String expirationDate) {
+    expirationDate = expirationDate;
+  }
+
+  String getArrayPromemoria() {
+    return arrayPromemoria;
+  }
+
+  void setArrayPromemoria(String arrayPromemoria) {
+    arrayPromemoria = arrayPromemoria;
+  }
+
+  String getDescription() {
+    return description;
+  }
+
+  void setDescription(String description) {
+    description = description;
+  }
+
+  Priority getPriority() {
+    return priority;
+  }
+
+  void setPriority(Priority priority) {
+    priority = priority;
+  }
+
+
 }

lib/pages/test.dart

@@ -29,14 +29,6 @@ class _TestState extends State<Test> {
     print("Data printed");
   }
 
-  Future<void> _deletedatabase() async {
-    final db = await noteDatabase.database;
-
-    print("Deleting database");
-    await db.delete(noteTable);
-    print("Database deleted");
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -44,8 +36,7 @@ class _TestState extends State<Test> {
             child: Column(
               children: [
                 FloatingActionButton(onPressed: _pressed),
-                FloatingActionButton(onPressed: _printdata),
+                FloatingActionButton(onPressed: _printdata)
-                FloatingActionButton(onPressed: _deletedatabase)
               ],
             )
         )