add workout get db function

lib/mock/db_mock.dart

@@ -17,7 +17,7 @@ class DatabaseMock implements DatabaseService {
   final List<Mood> _moodRecords = [];
   final List<Sleep> _sleepRecords = [];
   final List<Relapse> _relapseRecords = [];
-  final List<DatabaseRecord> _workoutRecords = [];
+  final List<Workout> _workoutRecords = [];
 
   @override
   Future<int> addMood(Mood mood) {
@@ -60,4 +60,9 @@ class DatabaseMock implements DatabaseService {
   Future<List<Relapse>> getRelapseRecords() {
     return Future.value(_relapseRecords);
   }
+
+  @override
+  Future<List<Workout>> getWorkoutRecords() {
+    return Future.value(_workoutRecords);
+  }
 }

lib/models/workout.dart

@@ -7,10 +7,16 @@ class Workout implements DatabaseRecord {
 
   Workout(this._motivationBefore, this._motivationAfter, this._workoutDate);
 
+  @override
+  factory Workout.fromDatabase(Map<String, dynamic> map) {
+    return Workout(map['motivationBefore'], map['motivationAfter'],
+        DateTime.parse(map['workoutDate']));
+  }
+
   @override
   factory Workout.fromMap(Map<String, dynamic> map) {
-    return Workout(map['_workoutDuration'], map['_motivationBefore'],
-        map['_motivationAfter']);
+    return Workout(
+        map['motivationBefore'], map['motivationAfter'], map['workoutDate']);
   }
 
   @override

lib/services/database_service.dart

@@ -63,6 +63,15 @@ class DatabaseService {
     return relapseList;
   }
 
+  Future<List<Workout>> getWorkoutRecords() async {
+    Database db = await instance.database;
+    var workoutRecords = await db.query('workout');
+    List<Workout> workoutList = workoutRecords.isNotEmpty
+        ? workoutRecords.map((e) => Workout.fromDatabase(e)).toList()
+        : [];
+    return workoutList;
+  }
+
   Future<int> addMood(Mood mood) async {
     Database db = await instance.database;
     return await db.insert('mood', mood.toMap());