Refactor supplement intake handling to support fractional units and update notification service initialization for Linux

lib/services/database_helper.dart

@@ -68,7 +68,7 @@ class DatabaseHelper {
         supplementId INTEGER NOT NULL,
         takenAt TEXT NOT NULL,
         dosageTaken REAL NOT NULL,
-        unitsTaken INTEGER NOT NULL DEFAULT 1,
+        unitsTaken REAL NOT NULL DEFAULT 1,
         notes TEXT,
         FOREIGN KEY (supplementId) REFERENCES $supplementsTable (id)
       )
@@ -77,20 +77,49 @@ class DatabaseHelper {
 
   Future<void> _onUpgrade(Database db, int oldVersion, int newVersion) async {
     if (oldVersion < 2) {
-      // Add new columns for version 2
+      // First, add new columns
       await db.execute('ALTER TABLE $supplementsTable ADD COLUMN dosageAmount REAL DEFAULT 0');
       await db.execute('ALTER TABLE $supplementsTable ADD COLUMN numberOfUnits INTEGER DEFAULT 1');
       await db.execute('ALTER TABLE $supplementsTable ADD COLUMN unitType TEXT DEFAULT "units"');
-      await db.execute('ALTER TABLE $intakesTable ADD COLUMN unitsTaken INTEGER DEFAULT 1');
+      await db.execute('ALTER TABLE $intakesTable ADD COLUMN unitsTaken REAL DEFAULT 1');
       
-      // Migrate existing data
+      // Migrate existing data from old dosage column to new dosageAmount column
       await db.execute('''
         UPDATE $supplementsTable 
-        SET dosageAmount = dosage, 
+        SET dosageAmount = COALESCE(dosage, 0), 
             numberOfUnits = 1,
             unitType = 'units'
         WHERE dosageAmount = 0
       ''');
+      
+      // Create new table with correct schema
+      await db.execute('''
+        CREATE TABLE ${supplementsTable}_new (
+          id INTEGER PRIMARY KEY AUTOINCREMENT,
+          name TEXT NOT NULL,
+          dosageAmount REAL NOT NULL,
+          numberOfUnits INTEGER NOT NULL DEFAULT 1,
+          unit TEXT NOT NULL,
+          unitType TEXT NOT NULL DEFAULT 'units',
+          frequencyPerDay INTEGER NOT NULL,
+          reminderTimes TEXT NOT NULL,
+          notes TEXT,
+          createdAt TEXT NOT NULL,
+          isActive INTEGER NOT NULL DEFAULT 1
+        )
+      ''');
+      
+      // Copy data to new table
+      await db.execute('''
+        INSERT INTO ${supplementsTable}_new 
+        (id, name, dosageAmount, numberOfUnits, unit, unitType, frequencyPerDay, reminderTimes, notes, createdAt, isActive)
+        SELECT id, name, dosageAmount, numberOfUnits, unit, unitType, frequencyPerDay, reminderTimes, notes, createdAt, isActive
+        FROM $supplementsTable
+      ''');
+      
+      // Drop old table and rename new table
+      await db.execute('DROP TABLE $supplementsTable');
+      await db.execute('ALTER TABLE ${supplementsTable}_new RENAME TO $supplementsTable');
     }
   }
 
@@ -184,7 +213,7 @@ class DatabaseHelper {
     String endDate = DateTime(date.year, date.month, date.day, 23, 59, 59).toIso8601String();
     
     List<Map<String, dynamic>> result = await db.rawQuery('''
-      SELECT i.*, s.name as supplementName, s.unit as supplementUnit
+      SELECT i.*, s.name as supplementName, s.unit as supplementUnit, s.unitType as supplementUnitType
       FROM $intakesTable i
       JOIN $supplementsTable s ON i.supplementId = s.id
       WHERE i.takenAt >= ? AND i.takenAt <= ?
@@ -200,7 +229,7 @@ class DatabaseHelper {
     String endDate = DateTime(year, month + 1, 0, 23, 59, 59).toIso8601String();
     
     List<Map<String, dynamic>> result = await db.rawQuery('''
-      SELECT i.*, s.name as supplementName, s.unit as supplementUnit
+      SELECT i.*, s.name as supplementName, s.unit as supplementUnit, s.unitType as supplementUnitType
       FROM $intakesTable i
       JOIN $supplementsTable s ON i.supplementId = s.id
       WHERE i.takenAt >= ? AND i.takenAt <= ?

lib/services/notification_service.dart

@@ -19,10 +19,14 @@ class NotificationService {
       requestBadgePermission: true,
       requestSoundPermission: true,
     );
+    const LinuxInitializationSettings linuxSettings = LinuxInitializationSettings(
+      defaultActionName: 'Open notification',
+    );
 
     const InitializationSettings initSettings = InitializationSettings(
       android: androidSettings,
       iOS: iosSettings,
+      linux: linuxSettings,
     );
 
     await _notifications.initialize(initSettings);