From 92e2baacaa215839197deb889fac9c526d3510fe Mon Sep 17 00:00:00 2001
From: Username * <oueslatim@pm.me>
Date: Fri, 22 Dec 2023 22:31:17 +0100
Subject: [PATCH] feat: change database from hive to drift

---
 android/app/src/main/AndroidManifest.xml      |   1 +
 lib/components/settings/timetable_data.dart   |   4 +-
 .../subject_management/subject_screen.dart    |  35 +-
 lib/components/timetable_views/day_view.dart  |   9 +-
 lib/components/timetable_views/grid_view.dart |  11 +-
 .../widgets/day_view_subject_builder.dart     |  13 +-
 ...rid_view_overlapping_subjects_builder.dart |  15 +-
 .../widgets/grid_view_subject_builder.dart    |   6 +-
 lib/constants/basic_subject.dart              |  11 +-
 lib/constants/rotation_weeks.dart             |   8 +-
 lib/db/connection/native.dart                 |  24 +
 lib/db/converters/color_converter.dart        |  18 +
 lib/db/converters/time_of_day_converter.dart  |  21 +
 lib/db/database.dart                          |  25 +
 lib/db/database.g.dart                        | 456 ++++++++++++++++++
 lib/db/models.dart                            |  71 +++
 lib/main.dart                                 |   8 +-
 lib/models/days.g.dart                        |  17 -
 lib/models/overlapping_subjects.dart          |   6 +-
 lib/models/rotationWeeks.g.dart               |  17 -
 lib/models/subjects.dart                      | 131 -----
 lib/models/subjects.g.dart                    |  56 ---
 lib/models/timeOfDay.g.dart                   |  25 -
 lib/screens/timetable_screen.dart             |   5 +
 pubspec.lock                                  | 156 +++---
 pubspec.yaml                                  |  14 +-
 26 files changed, 793 insertions(+), 370 deletions(-)
 create mode 100644 lib/db/connection/native.dart
 create mode 100644 lib/db/converters/color_converter.dart
 create mode 100644 lib/db/converters/time_of_day_converter.dart
 create mode 100644 lib/db/database.dart
 create mode 100644 lib/db/database.g.dart
 create mode 100644 lib/db/models.dart
 delete mode 100644 lib/models/days.g.dart
 delete mode 100644 lib/models/rotationWeeks.g.dart
 delete mode 100644 lib/models/subjects.dart
 delete mode 100644 lib/models/subjects.g.dart
 delete mode 100644 lib/models/timeOfDay.g.dart

diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index d0c1af4..8dbb2ae 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -10,6 +10,7 @@
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
+            android:enableOnBackInvokedCallback="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
diff --git a/lib/components/settings/timetable_data.dart b/lib/components/settings/timetable_data.dart
index 14e64c4..62f92f7 100644
--- a/lib/components/settings/timetable_data.dart
+++ b/lib/components/settings/timetable_data.dart
@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:timetable/components/widgets/alert_dialog.dart';
-import 'package:timetable/models/subjects.dart';
+import 'package:timetable/db/models.dart';
 
 /// All the settings that allow for manipulating the timetable's data.
 class TimetableDataOptions extends ConsumerWidget {
@@ -9,7 +9,7 @@ class TimetableDataOptions extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    final subjNotifier = ref.watch(subjectProvider.notifier);
+    final subjNotifier = ref.watch(subjProvider.notifier);
 
     return Column(
       children: [
diff --git a/lib/components/subject_management/subject_screen.dart b/lib/components/subject_management/subject_screen.dart
index fcfd924..7d492a1 100644
--- a/lib/components/subject_management/subject_screen.dart
+++ b/lib/components/subject_management/subject_screen.dart
@@ -8,16 +8,17 @@ import 'package:timetable/components/widgets/list_tile_group.dart';
 import 'package:timetable/constants/basic_subject.dart';
 import 'package:timetable/constants/days.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/db/database.dart';
+import 'package:timetable/db/models.dart';
 import 'package:timetable/models/overlapping_subjects.dart';
 import 'package:timetable/models/settings.dart';
-import 'package:timetable/models/subjects.dart';
 
 /// The Subject creation/modification screen.
 /// Uses [TimeDayRotationWeekConfig], [NotesTile] and [ColorsConfig]
 class SubjectScreen extends HookConsumerWidget {
   final int? rowIndex;
   final int? columnIndex;
-  final Subject? subject;
+  final SubjectData? subject;
 
   const SubjectScreen({
     super.key,
@@ -30,7 +31,13 @@ class SubjectScreen extends HookConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final subjects = ref.watch(subjProvider);
+    final subjectNotifier = ref.watch(subjProvider.notifier);
+    final overlappingSubjects = ref.watch(overlappingSubjectsProvider);
+    final autoCompleteColor = ref.watch(settingsProvider).autoCompleteColor;
+
     final bool isSubjectNull = subject == null;
+    final int id = isSubjectNull ? subjects.length : subject!.id;
     final startTime = useState(
       TimeOfDay(
         hour: isSubjectNull ? (rowIndex! + 8) : subject!.startTime.hour,
@@ -43,23 +50,23 @@ class SubjectScreen extends HookConsumerWidget {
         minute: 0,
       ),
     );
-    final overlappingSubjects = ref.watch(overlappingSubjectsProvider);
-    final state = ref.read(subjectProvider.notifier);
-    final autoCompleteColor = ref.watch(settingsProvider).autoCompleteColor;
+
     final day = useState(
         Days.values[isSubjectNull ? columnIndex! : subject!.day.index]);
     final rotationWeek =
         useState(isSubjectNull ? RotationWeeks.none : subject!.rotationWeek);
-    final color = useState(isSubjectNull ? Colors.black : subject!.color);
+    final color =
+        useState(isSubjectNull ? Colors.black : Color(subject!.color));
 
     final label = useState(subject?.label ?? "");
     final location = useState(subject?.location ?? "");
     final note = useState(subject?.note ?? "");
 
-    final Subject newSubject = Subject(
+    final SubjectData newSubject = SubjectData(
+      id: id,
       label: label.value,
       location: location.value,
-      color: color.value,
+      color: color.value.value,
       startTime: startTime.value,
       endTime: endTime.value,
       day: day.value,
@@ -67,8 +74,6 @@ class SubjectScreen extends HookConsumerWidget {
       note: note.value,
     );
 
-    final subjects = ref.watch(subjectProvider);
-
     final subjectsInSameDay = subjects
         .where(
           (e) => e.day == day.value,
@@ -116,7 +121,7 @@ class SubjectScreen extends HookConsumerWidget {
                 foregroundColor: Theme.of(context).colorScheme.errorContainer,
               ),
               onPressed: () {
-                state.removeSubject(subject!, overlappingSubjects);
+                subjectNotifier.deleteSubject(newSubject);
                 ScaffoldMessenger.of(context).showSnackBar(
                   const SnackBar(
                     content: Text('Subject Deleted!'),
@@ -140,7 +145,7 @@ class SubjectScreen extends HookConsumerWidget {
                 if (formKey.currentState!.validate()) {
                   if (isSubjectNull) {
                     if (!isOccupied) {
-                      state.addSubject(newSubject);
+                      subjectNotifier.addSubject(newSubject.toCompanion(false));
                       Navigator.pop(context, label.value);
                     } else {
                       ScaffoldMessenger.of(context).showSnackBar(
@@ -151,7 +156,7 @@ class SubjectScreen extends HookConsumerWidget {
                     }
                   } else {
                     if (!isOccupiedExceptSelf) {
-                      state.updateSubject(subject!, newSubject);
+                      subjectNotifier.updateSubject(newSubject);
                       Navigator.pop(context, label.value);
                     } else {
                       ScaffoldMessenger.of(context).showSnackBar(
@@ -194,14 +199,14 @@ class SubjectScreen extends HookConsumerWidget {
                         onChanged: (value) {
                           label.value = value;
                           if (autoCompleteColor) {
-                            color.value = subjects
+                            color.value = Color(subjects
                                 .firstWhere(
                                   (subj) =>
                                       label.value.toLowerCase() ==
                                       subj.label.toLowerCase(),
                                   orElse: () => basicSubject,
                                 )
-                                .color;
+                                .color);
                           }
                         },
                       ),
diff --git a/lib/components/timetable_views/day_view.dart b/lib/components/timetable_views/day_view.dart
index af13ee1..72ee4e8 100644
--- a/lib/components/timetable_views/day_view.dart
+++ b/lib/components/timetable_views/day_view.dart
@@ -5,21 +5,22 @@ import 'package:timetable/components/widgets/day_view_subject_builder.dart';
 import 'package:timetable/constants/days.dart';
 import 'package:timetable/constants/grid_properties.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
-import 'package:timetable/models/subjects.dart';
+import 'package:timetable/db/database.dart';
 
 /// Timetable view that shows each day's subjects in a single screen.
 class TimetableDayView extends HookConsumerWidget {
   final ValueNotifier<RotationWeeks> rotationWeek;
+  final List<SubjectData> subject;
 
   const TimetableDayView({
     super.key,
     required this.rotationWeek,
+    required this.subject,
   });
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     PageController controller;
-    final subject = ref.watch(subjectProvider);
     controller = PageController(initialPage: DateTime.now().weekday - 1);
 
     return Column(
@@ -52,7 +53,9 @@ class TimetableDayView extends HookConsumerWidget {
                       Column(
                         crossAxisAlignment: CrossAxisAlignment.stretch,
                         children: getFilteredByRotationWeeksSubjects(
-                                rotationWeek, subject)
+                          rotationWeek,
+                          subject,
+                        )
                             .where((s) => s.day.index == index)
                             .map(
                               (subject) => DayViewSubjectBuilder(
diff --git a/lib/components/timetable_views/grid_view.dart b/lib/components/timetable_views/grid_view.dart
index 3ab3c54..c4609b7 100644
--- a/lib/components/timetable_views/grid_view.dart
+++ b/lib/components/timetable_views/grid_view.dart
@@ -7,8 +7,8 @@ import 'package:timetable/components/widgets/time_column.dart';
 import 'package:timetable/constants/custom_times.dart';
 import 'package:timetable/constants/grid_properties.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/db/database.dart';
 import 'package:timetable/models/overlapping_subjects.dart';
-import 'package:timetable/models/subjects.dart';
 import 'package:timetable/components/widgets/grid_view_subject_builder.dart';
 import 'package:timetable/components/widgets/subject_container_builder.dart';
 import 'package:timetable/components/widgets/tile.dart';
@@ -17,15 +17,16 @@ import 'package:timetable/models/settings.dart';
 /// Timetable view that shows All the days' subjects in a grid form.
 class TimetableGridView extends HookConsumerWidget {
   final ValueNotifier<RotationWeeks> rotationWeek;
+  final List<SubjectData> subject;
 
   const TimetableGridView({
     super.key,
     required this.rotationWeek,
+    required this.subject,
   });
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    final subject = ref.watch(subjectProvider);
     final compactMode = ref.watch(settingsProvider).compactMode;
     final customStartTime = ref.watch(settingsProvider).customStartTime;
     final customEndTime = ref.watch(settingsProvider).customEndTime;
@@ -83,7 +84,7 @@ class TimetableGridView extends HookConsumerWidget {
   }
 
   List<List<Tile?>> generate(
-    List<Subject> subjects,
+    List<SubjectData> subjects,
     int totalDays,
     int totalHours,
     WidgetRef ref,
@@ -135,7 +136,7 @@ class TimetableGridView extends HookConsumerWidget {
             );
 
             for (final subjects in overlappingSubjects) {
-              Subject getSubjectWithEarlierStartTime() {
+              SubjectData getSubjectWithEarlierStartTime() {
                 if (subjects[0].startTime.hour < subjects[1].startTime.hour) {
                   return subjects[0];
                 } else {
@@ -143,7 +144,7 @@ class TimetableGridView extends HookConsumerWidget {
                 }
               }
 
-              Subject getSubjectWithLaterEndTime() {
+              SubjectData getSubjectWithLaterEndTime() {
                 if (subjects[0].endTime.hour > subjects[1].endTime.hour) {
                   return subjects[0];
                 } else {
diff --git a/lib/components/widgets/day_view_subject_builder.dart b/lib/components/widgets/day_view_subject_builder.dart
index 89c4f77..a0a48a3 100644
--- a/lib/components/widgets/day_view_subject_builder.dart
+++ b/lib/components/widgets/day_view_subject_builder.dart
@@ -1,13 +1,13 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/db/database.dart';
 import 'package:timetable/models/settings.dart';
-import 'package:timetable/models/subjects.dart';
 import 'package:timetable/components/subject_management/subject_screen.dart';
 
 /// Subject builder for the day view.
 class DayViewSubjectBuilder extends ConsumerWidget {
-  final Subject subject;
+  final SubjectData subject;
 
   const DayViewSubjectBuilder({super.key, required this.subject});
 
@@ -16,15 +16,16 @@ class DayViewSubjectBuilder extends ConsumerWidget {
     final rotationWeeks = ref.watch(settingsProvider).rotationWeeks;
     final hideTransparentSubject =
         ref.watch(settingsProvider).hideTransparentSubject;
-    Color labelColor =
-        subject.color.computeLuminance() > .7 ? Colors.black : Colors.white;
-    Color subLabelsColor = subject.color.computeLuminance() > .7
+    Color labelColor = Color(subject.color).computeLuminance() > .7
+        ? Colors.black
+        : Colors.white;
+    Color subLabelsColor = Color(subject.color).computeLuminance() > .7
         ? Colors.black.withOpacity(.6)
         : Colors.white.withOpacity(.75);
 
     String label = subject.label;
     String? location = subject.location;
-    Color color = subject.color;
+    Color color = Color(subject.color);
     String? note = subject.note;
 
     final hideTransparentSubjects =
diff --git a/lib/components/widgets/grid_view_overlapping_subjects_builder.dart b/lib/components/widgets/grid_view_overlapping_subjects_builder.dart
index cba7209..ef67ea4 100644
--- a/lib/components/widgets/grid_view_overlapping_subjects_builder.dart
+++ b/lib/components/widgets/grid_view_overlapping_subjects_builder.dart
@@ -4,13 +4,13 @@ import 'package:non_uniform_border/non_uniform_border.dart';
 import 'package:timetable/constants/custom_times.dart';
 import 'package:timetable/constants/grid_properties.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/db/database.dart';
 import 'package:timetable/models/settings.dart';
-import 'package:timetable/models/subjects.dart';
 import 'package:timetable/components/subject_management/subject_screen.dart';
 
 /// Overlapping Subjects Builder for the grid view.
 class OverlappingSubjBuilder extends ConsumerWidget {
-  final List<Subject> subjects;
+  final List<SubjectData> subjects;
   final int earlierStartTimeHour;
   final int laterEndTimeHour;
 
@@ -63,18 +63,19 @@ class OverlappingSubjBuilder extends ConsumerWidget {
       ),
       child: Row(
         children: List.generate(subjects.length, (i) {
-          Color labelColor = subjects[i].color.computeLuminance() > .7
+          Color labelColor = Color(subjects[i].color).computeLuminance() > .7
               ? Colors.black
               : Colors.white;
-          Color subLabelsColor = subjects[i].color.computeLuminance() > .7
-              ? Colors.black.withOpacity(.6)
-              : Colors.white.withOpacity(.75);
+          Color subLabelsColor =
+              Color(subjects[i].color).computeLuminance() > .7
+                  ? Colors.black.withOpacity(.6)
+                  : Colors.white.withOpacity(.75);
 
           int endTimeHour = subjects[i].endTime.hour;
           int startTimeHour = subjects[i].startTime.hour;
           String label = subjects[i].label;
           String? location = subjects[i].location;
-          Color color = subjects[i].color;
+          Color color = Color(subjects[i].color);
 
           int subjHeight = endTimeHour - startTimeHour;
 
diff --git a/lib/components/widgets/grid_view_subject_builder.dart b/lib/components/widgets/grid_view_subject_builder.dart
index bb64e75..b2bc89f 100644
--- a/lib/components/widgets/grid_view_subject_builder.dart
+++ b/lib/components/widgets/grid_view_subject_builder.dart
@@ -3,14 +3,14 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:non_uniform_border/non_uniform_border.dart';
 import 'package:timetable/constants/custom_times.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/db/database.dart';
 import 'package:timetable/models/settings.dart';
-import 'package:timetable/models/subjects.dart';
 import 'package:timetable/components/subject_management/subject_screen.dart';
 import 'package:timetable/constants/grid_properties.dart';
 
 /// Subject builder for the grid view.
 class SubjectBuilder extends ConsumerWidget {
-  final Subject subject;
+  final SubjectData subject;
 
   const SubjectBuilder({
     super.key,
@@ -28,7 +28,7 @@ class SubjectBuilder extends ConsumerWidget {
 
     String label = subject.label;
     String? location = subject.location;
-    Color color = subject.color;
+    Color color = Color(subject.color);
 
     final hideTransparentSubjects =
         hideTransparentSubject && color.opacity == Colors.transparent.opacity;
diff --git a/lib/constants/basic_subject.dart b/lib/constants/basic_subject.dart
index 22b805c..2801e00 100644
--- a/lib/constants/basic_subject.dart
+++ b/lib/constants/basic_subject.dart
@@ -1,16 +1,17 @@
 import 'package:flutter/material.dart';
 import 'package:timetable/constants/days.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
-import 'package:timetable/models/subjects.dart';
+import 'package:timetable/db/database.dart';
 
 /// A basic subject with no additional information.
 /// Used for the color autocomplete feature.
-const basicSubject = Subject(
+final basicSubject = SubjectData(
+  id: 0,
   label: " ",
   location: "",
-  color: Colors.black,
-  startTime: TimeOfDay(hour: 8, minute: 0),
-  endTime: TimeOfDay(hour: 18, minute: 0),
+  color: Colors.black.value,
+  startTime: const TimeOfDay(hour: 8, minute: 0),
+  endTime: const TimeOfDay(hour: 18, minute: 0),
   day: Days.monday,
   rotationWeek: RotationWeeks.all,
   note: "",
diff --git a/lib/constants/rotation_weeks.dart b/lib/constants/rotation_weeks.dart
index 55e098e..6a94636 100644
--- a/lib/constants/rotation_weeks.dart
+++ b/lib/constants/rotation_weeks.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:timetable/models/subjects.dart';
+import 'package:timetable/db/database.dart';
 
 /// Basic Rotation Weeks.
 enum RotationWeeks {
@@ -38,9 +38,9 @@ String getRotationWeekButtonLabel(RotationWeeks rotationWeek) {
 }
 
 /// Filters the list of subjects based on the selected rotation week.
-List<Subject> getFilteredByRotationWeeksSubjects(
+List<SubjectData> getFilteredByRotationWeeksSubjects(
   ValueNotifier<RotationWeeks> rotationWeek,
-  List<Subject> allSubjects,
+  List<SubjectData> allSubjects,
 ) {
   switch (rotationWeek.value) {
     case RotationWeeks.all:
@@ -81,7 +81,7 @@ List<Subject> getFilteredByRotationWeeksSubjects(
 }
 
 /// Returns rotation week label of a Subject.
-String getSubjectRotationWeekLabel(Subject subject) {
+String getSubjectRotationWeekLabel(SubjectData subject) {
   switch (subject.rotationWeek) {
     case RotationWeeks.a:
       return "A";
diff --git a/lib/db/connection/native.dart b/lib/db/connection/native.dart
new file mode 100644
index 0000000..018a561
--- /dev/null
+++ b/lib/db/connection/native.dart
@@ -0,0 +1,24 @@
+import 'dart:io';
+
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as p;
+import 'package:sqlite3/sqlite3.dart';
+import 'package:sqlite3_flutter_libs/sqlite3_flutter_libs.dart';
+
+LazyDatabase openConnection() {
+  return LazyDatabase(() async {
+    final dbFolder = await getApplicationDocumentsDirectory();
+    final file = File(p.join(dbFolder.path, 'db.sqlite'));
+
+    if (Platform.isAndroid) {
+      await applyWorkaroundToOpenSqlite3OnOldAndroidVersions();
+    }
+
+    final cachebase = (await getTemporaryDirectory()).path;
+    sqlite3.tempDirectory = cachebase;
+
+    return NativeDatabase.createInBackground(file);
+  });
+}
diff --git a/lib/db/converters/color_converter.dart b/lib/db/converters/color_converter.dart
new file mode 100644
index 0000000..2604ab1
--- /dev/null
+++ b/lib/db/converters/color_converter.dart
@@ -0,0 +1,18 @@
+import 'package:drift/drift.dart';
+import 'package:flutter/material.dart';
+
+class ColorConverter extends TypeConverter<Color, int> {
+  const ColorConverter();
+
+  @override
+  Color fromSql(int fromDb) {
+    // Parse TimeOfDay from String
+    return Color(fromDb);
+  }
+
+  @override
+  int toSql(Color value) {
+    // get Color value (int)
+    return value.value;
+  }
+}
diff --git a/lib/db/converters/time_of_day_converter.dart b/lib/db/converters/time_of_day_converter.dart
new file mode 100644
index 0000000..619e767
--- /dev/null
+++ b/lib/db/converters/time_of_day_converter.dart
@@ -0,0 +1,21 @@
+import 'package:drift/drift.dart';
+import 'package:flutter/material.dart';
+
+class TimeOfDayConverter extends TypeConverter<TimeOfDay, String> {
+  const TimeOfDayConverter();
+
+  @override
+  TimeOfDay fromSql(String fromDb) {
+    // Parse TimeOfDay from String
+    return TimeOfDay(
+      hour: int.parse(fromDb.split(':')[0].replaceAll("TimeOfDay(", "")),
+      minute: int.parse(fromDb.split(':')[1].replaceAll(")", "")),
+    );
+  }
+
+  @override
+  String toSql(TimeOfDay value) {
+    // Convert TimeOfDay to String
+    return value.toString();
+  }
+}
diff --git a/lib/db/database.dart b/lib/db/database.dart
new file mode 100644
index 0000000..f2d956d
--- /dev/null
+++ b/lib/db/database.dart
@@ -0,0 +1,25 @@
+import 'package:drift/drift.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/constants/days.dart';
+import 'package:timetable/db/models.dart';
+import 'package:timetable/db/connection/native.dart';
+import 'package:timetable/db/converters/time_of_day_converter.dart';
+import 'package:flutter/material.dart' as material;
+
+part 'database.g.dart';
+
+@DriftDatabase(tables: [Subject])
+class AppDatabase extends _$AppDatabase {
+  AppDatabase() : super(openConnection());
+
+  @override
+  int get schemaVersion => 1;
+
+  static final StateProvider<AppDatabase> provider = StateProvider((ref) {
+    final database = AppDatabase();
+    ref.onDispose(database.close);
+
+    return database;
+  });
+}
diff --git a/lib/db/database.g.dart b/lib/db/database.g.dart
new file mode 100644
index 0000000..4ec7aa3
--- /dev/null
+++ b/lib/db/database.g.dart
@@ -0,0 +1,456 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'database.dart';
+
+// ignore_for_file: type=lint
+class $SubjectTable extends Subject with TableInfo<$SubjectTable, SubjectData> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  $SubjectTable(this.attachedDatabase, [this._alias]);
+  static const VerificationMeta _idMeta = const VerificationMeta('id');
+  @override
+  late final GeneratedColumn<int> id = GeneratedColumn<int>(
+      'id', aliasedName, false,
+      hasAutoIncrement: true,
+      type: DriftSqlType.int,
+      requiredDuringInsert: false,
+      defaultConstraints:
+          GeneratedColumn.constraintIsAlways('PRIMARY KEY AUTOINCREMENT'));
+  static const VerificationMeta _labelMeta = const VerificationMeta('label');
+  @override
+  late final GeneratedColumn<String> label = GeneratedColumn<String>(
+      'label', aliasedName, false,
+      type: DriftSqlType.string, requiredDuringInsert: true);
+  static const VerificationMeta _locationMeta =
+      const VerificationMeta('location');
+  @override
+  late final GeneratedColumn<String> location = GeneratedColumn<String>(
+      'location', aliasedName, true,
+      type: DriftSqlType.string, requiredDuringInsert: false);
+  static const VerificationMeta _noteMeta = const VerificationMeta('note');
+  @override
+  late final GeneratedColumn<String> note = GeneratedColumn<String>(
+      'note', aliasedName, true,
+      type: DriftSqlType.string, requiredDuringInsert: false);
+  static const VerificationMeta _colorMeta = const VerificationMeta('color');
+  @override
+  late final GeneratedColumn<int> color = GeneratedColumn<int>(
+      'color', aliasedName, false,
+      type: DriftSqlType.int, requiredDuringInsert: true);
+  static const VerificationMeta _rotationWeekMeta =
+      const VerificationMeta('rotationWeek');
+  @override
+  late final GeneratedColumnWithTypeConverter<RotationWeeks, int> rotationWeek =
+      GeneratedColumn<int>('rotation_week', aliasedName, false,
+              type: DriftSqlType.int, requiredDuringInsert: true)
+          .withConverter<RotationWeeks>($SubjectTable.$converterrotationWeek);
+  static const VerificationMeta _dayMeta = const VerificationMeta('day');
+  @override
+  late final GeneratedColumnWithTypeConverter<Days, int> day =
+      GeneratedColumn<int>('day', aliasedName, false,
+              type: DriftSqlType.int, requiredDuringInsert: true)
+          .withConverter<Days>($SubjectTable.$converterday);
+  static const VerificationMeta _startTimeMeta =
+      const VerificationMeta('startTime');
+  @override
+  late final GeneratedColumnWithTypeConverter<material.TimeOfDay, String>
+      startTime = GeneratedColumn<String>('start_time', aliasedName, false,
+              type: DriftSqlType.string, requiredDuringInsert: true)
+          .withConverter<material.TimeOfDay>($SubjectTable.$converterstartTime);
+  static const VerificationMeta _endTimeMeta =
+      const VerificationMeta('endTime');
+  @override
+  late final GeneratedColumnWithTypeConverter<material.TimeOfDay, String>
+      endTime = GeneratedColumn<String>('end_time', aliasedName, false,
+              type: DriftSqlType.string, requiredDuringInsert: true)
+          .withConverter<material.TimeOfDay>($SubjectTable.$converterendTime);
+  @override
+  List<GeneratedColumn> get $columns =>
+      [id, label, location, note, color, rotationWeek, day, startTime, endTime];
+  @override
+  String get aliasedName => _alias ?? actualTableName;
+  @override
+  String get actualTableName => $name;
+  static const String $name = 'subject';
+  @override
+  VerificationContext validateIntegrity(Insertable<SubjectData> instance,
+      {bool isInserting = false}) {
+    final context = VerificationContext();
+    final data = instance.toColumns(true);
+    if (data.containsKey('id')) {
+      context.handle(_idMeta, id.isAcceptableOrUnknown(data['id']!, _idMeta));
+    }
+    if (data.containsKey('label')) {
+      context.handle(
+          _labelMeta, label.isAcceptableOrUnknown(data['label']!, _labelMeta));
+    } else if (isInserting) {
+      context.missing(_labelMeta);
+    }
+    if (data.containsKey('location')) {
+      context.handle(_locationMeta,
+          location.isAcceptableOrUnknown(data['location']!, _locationMeta));
+    }
+    if (data.containsKey('note')) {
+      context.handle(
+          _noteMeta, note.isAcceptableOrUnknown(data['note']!, _noteMeta));
+    }
+    if (data.containsKey('color')) {
+      context.handle(
+          _colorMeta, color.isAcceptableOrUnknown(data['color']!, _colorMeta));
+    } else if (isInserting) {
+      context.missing(_colorMeta);
+    }
+    context.handle(_rotationWeekMeta, const VerificationResult.success());
+    context.handle(_dayMeta, const VerificationResult.success());
+    context.handle(_startTimeMeta, const VerificationResult.success());
+    context.handle(_endTimeMeta, const VerificationResult.success());
+    return context;
+  }
+
+  @override
+  Set<GeneratedColumn> get $primaryKey => {id};
+  @override
+  SubjectData map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return SubjectData(
+      id: attachedDatabase.typeMapping
+          .read(DriftSqlType.int, data['${effectivePrefix}id'])!,
+      label: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}label'])!,
+      location: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}location']),
+      note: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}note']),
+      color: attachedDatabase.typeMapping
+          .read(DriftSqlType.int, data['${effectivePrefix}color'])!,
+      rotationWeek: $SubjectTable.$converterrotationWeek.fromSql(
+          attachedDatabase.typeMapping.read(
+              DriftSqlType.int, data['${effectivePrefix}rotation_week'])!),
+      day: $SubjectTable.$converterday.fromSql(attachedDatabase.typeMapping
+          .read(DriftSqlType.int, data['${effectivePrefix}day'])!),
+      startTime: $SubjectTable.$converterstartTime.fromSql(attachedDatabase
+          .typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}start_time'])!),
+      endTime: $SubjectTable.$converterendTime.fromSql(attachedDatabase
+          .typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}end_time'])!),
+    );
+  }
+
+  @override
+  $SubjectTable createAlias(String alias) {
+    return $SubjectTable(attachedDatabase, alias);
+  }
+
+  static JsonTypeConverter2<RotationWeeks, int, int> $converterrotationWeek =
+      const EnumIndexConverter<RotationWeeks>(RotationWeeks.values);
+  static JsonTypeConverter2<Days, int, int> $converterday =
+      const EnumIndexConverter<Days>(Days.values);
+  static TypeConverter<material.TimeOfDay, String> $converterstartTime =
+      const TimeOfDayConverter();
+  static TypeConverter<material.TimeOfDay, String> $converterendTime =
+      const TimeOfDayConverter();
+}
+
+class SubjectData extends DataClass implements Insertable<SubjectData> {
+  final int id;
+  final String label;
+  final String? location;
+  final String? note;
+  final int color;
+  final RotationWeeks rotationWeek;
+  final Days day;
+  final material.TimeOfDay startTime;
+  final material.TimeOfDay endTime;
+  const SubjectData(
+      {required this.id,
+      required this.label,
+      this.location,
+      this.note,
+      required this.color,
+      required this.rotationWeek,
+      required this.day,
+      required this.startTime,
+      required this.endTime});
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['id'] = Variable<int>(id);
+    map['label'] = Variable<String>(label);
+    if (!nullToAbsent || location != null) {
+      map['location'] = Variable<String>(location);
+    }
+    if (!nullToAbsent || note != null) {
+      map['note'] = Variable<String>(note);
+    }
+    map['color'] = Variable<int>(color);
+    {
+      map['rotation_week'] = Variable<int>(
+          $SubjectTable.$converterrotationWeek.toSql(rotationWeek));
+    }
+    {
+      map['day'] = Variable<int>($SubjectTable.$converterday.toSql(day));
+    }
+    {
+      map['start_time'] =
+          Variable<String>($SubjectTable.$converterstartTime.toSql(startTime));
+    }
+    {
+      map['end_time'] =
+          Variable<String>($SubjectTable.$converterendTime.toSql(endTime));
+    }
+    return map;
+  }
+
+  SubjectCompanion toCompanion(bool nullToAbsent) {
+    return SubjectCompanion(
+      id: Value(id),
+      label: Value(label),
+      location: location == null && nullToAbsent
+          ? const Value.absent()
+          : Value(location),
+      note: note == null && nullToAbsent ? const Value.absent() : Value(note),
+      color: Value(color),
+      rotationWeek: Value(rotationWeek),
+      day: Value(day),
+      startTime: Value(startTime),
+      endTime: Value(endTime),
+    );
+  }
+
+  factory SubjectData.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return SubjectData(
+      id: serializer.fromJson<int>(json['id']),
+      label: serializer.fromJson<String>(json['label']),
+      location: serializer.fromJson<String?>(json['location']),
+      note: serializer.fromJson<String?>(json['note']),
+      color: serializer.fromJson<int>(json['color']),
+      rotationWeek: $SubjectTable.$converterrotationWeek
+          .fromJson(serializer.fromJson<int>(json['rotationWeek'])),
+      day: $SubjectTable.$converterday
+          .fromJson(serializer.fromJson<int>(json['day'])),
+      startTime: serializer.fromJson<material.TimeOfDay>(json['startTime']),
+      endTime: serializer.fromJson<material.TimeOfDay>(json['endTime']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'id': serializer.toJson<int>(id),
+      'label': serializer.toJson<String>(label),
+      'location': serializer.toJson<String?>(location),
+      'note': serializer.toJson<String?>(note),
+      'color': serializer.toJson<int>(color),
+      'rotationWeek': serializer.toJson<int>(
+          $SubjectTable.$converterrotationWeek.toJson(rotationWeek)),
+      'day': serializer.toJson<int>($SubjectTable.$converterday.toJson(day)),
+      'startTime': serializer.toJson<material.TimeOfDay>(startTime),
+      'endTime': serializer.toJson<material.TimeOfDay>(endTime),
+    };
+  }
+
+  SubjectData copyWith(
+          {int? id,
+          String? label,
+          Value<String?> location = const Value.absent(),
+          Value<String?> note = const Value.absent(),
+          int? color,
+          RotationWeeks? rotationWeek,
+          Days? day,
+          material.TimeOfDay? startTime,
+          material.TimeOfDay? endTime}) =>
+      SubjectData(
+        id: id ?? this.id,
+        label: label ?? this.label,
+        location: location.present ? location.value : this.location,
+        note: note.present ? note.value : this.note,
+        color: color ?? this.color,
+        rotationWeek: rotationWeek ?? this.rotationWeek,
+        day: day ?? this.day,
+        startTime: startTime ?? this.startTime,
+        endTime: endTime ?? this.endTime,
+      );
+  @override
+  String toString() {
+    return (StringBuffer('SubjectData(')
+          ..write('id: $id, ')
+          ..write('label: $label, ')
+          ..write('location: $location, ')
+          ..write('note: $note, ')
+          ..write('color: $color, ')
+          ..write('rotationWeek: $rotationWeek, ')
+          ..write('day: $day, ')
+          ..write('startTime: $startTime, ')
+          ..write('endTime: $endTime')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(
+      id, label, location, note, color, rotationWeek, day, startTime, endTime);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is SubjectData &&
+          other.id == this.id &&
+          other.label == this.label &&
+          other.location == this.location &&
+          other.note == this.note &&
+          other.color == this.color &&
+          other.rotationWeek == this.rotationWeek &&
+          other.day == this.day &&
+          other.startTime == this.startTime &&
+          other.endTime == this.endTime);
+}
+
+class SubjectCompanion extends UpdateCompanion<SubjectData> {
+  final Value<int> id;
+  final Value<String> label;
+  final Value<String?> location;
+  final Value<String?> note;
+  final Value<int> color;
+  final Value<RotationWeeks> rotationWeek;
+  final Value<Days> day;
+  final Value<material.TimeOfDay> startTime;
+  final Value<material.TimeOfDay> endTime;
+  const SubjectCompanion({
+    this.id = const Value.absent(),
+    this.label = const Value.absent(),
+    this.location = const Value.absent(),
+    this.note = const Value.absent(),
+    this.color = const Value.absent(),
+    this.rotationWeek = const Value.absent(),
+    this.day = const Value.absent(),
+    this.startTime = const Value.absent(),
+    this.endTime = const Value.absent(),
+  });
+  SubjectCompanion.insert({
+    this.id = const Value.absent(),
+    required String label,
+    this.location = const Value.absent(),
+    this.note = const Value.absent(),
+    required int color,
+    required RotationWeeks rotationWeek,
+    required Days day,
+    required material.TimeOfDay startTime,
+    required material.TimeOfDay endTime,
+  })  : label = Value(label),
+        color = Value(color),
+        rotationWeek = Value(rotationWeek),
+        day = Value(day),
+        startTime = Value(startTime),
+        endTime = Value(endTime);
+  static Insertable<SubjectData> custom({
+    Expression<int>? id,
+    Expression<String>? label,
+    Expression<String>? location,
+    Expression<String>? note,
+    Expression<int>? color,
+    Expression<int>? rotationWeek,
+    Expression<int>? day,
+    Expression<String>? startTime,
+    Expression<String>? endTime,
+  }) {
+    return RawValuesInsertable({
+      if (id != null) 'id': id,
+      if (label != null) 'label': label,
+      if (location != null) 'location': location,
+      if (note != null) 'note': note,
+      if (color != null) 'color': color,
+      if (rotationWeek != null) 'rotation_week': rotationWeek,
+      if (day != null) 'day': day,
+      if (startTime != null) 'start_time': startTime,
+      if (endTime != null) 'end_time': endTime,
+    });
+  }
+
+  SubjectCompanion copyWith(
+      {Value<int>? id,
+      Value<String>? label,
+      Value<String?>? location,
+      Value<String?>? note,
+      Value<int>? color,
+      Value<RotationWeeks>? rotationWeek,
+      Value<Days>? day,
+      Value<material.TimeOfDay>? startTime,
+      Value<material.TimeOfDay>? endTime}) {
+    return SubjectCompanion(
+      id: id ?? this.id,
+      label: label ?? this.label,
+      location: location ?? this.location,
+      note: note ?? this.note,
+      color: color ?? this.color,
+      rotationWeek: rotationWeek ?? this.rotationWeek,
+      day: day ?? this.day,
+      startTime: startTime ?? this.startTime,
+      endTime: endTime ?? this.endTime,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (id.present) {
+      map['id'] = Variable<int>(id.value);
+    }
+    if (label.present) {
+      map['label'] = Variable<String>(label.value);
+    }
+    if (location.present) {
+      map['location'] = Variable<String>(location.value);
+    }
+    if (note.present) {
+      map['note'] = Variable<String>(note.value);
+    }
+    if (color.present) {
+      map['color'] = Variable<int>(color.value);
+    }
+    if (rotationWeek.present) {
+      map['rotation_week'] = Variable<int>(
+          $SubjectTable.$converterrotationWeek.toSql(rotationWeek.value));
+    }
+    if (day.present) {
+      map['day'] = Variable<int>($SubjectTable.$converterday.toSql(day.value));
+    }
+    if (startTime.present) {
+      map['start_time'] = Variable<String>(
+          $SubjectTable.$converterstartTime.toSql(startTime.value));
+    }
+    if (endTime.present) {
+      map['end_time'] = Variable<String>(
+          $SubjectTable.$converterendTime.toSql(endTime.value));
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('SubjectCompanion(')
+          ..write('id: $id, ')
+          ..write('label: $label, ')
+          ..write('location: $location, ')
+          ..write('note: $note, ')
+          ..write('color: $color, ')
+          ..write('rotationWeek: $rotationWeek, ')
+          ..write('day: $day, ')
+          ..write('startTime: $startTime, ')
+          ..write('endTime: $endTime')
+          ..write(')'))
+        .toString();
+  }
+}
+
+abstract class _$AppDatabase extends GeneratedDatabase {
+  _$AppDatabase(QueryExecutor e) : super(e);
+  late final $SubjectTable subject = $SubjectTable(this);
+  @override
+  Iterable<TableInfo<Table, Object?>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
+  @override
+  List<DatabaseSchemaEntity> get allSchemaEntities => [subject];
+}
diff --git a/lib/db/models.dart b/lib/db/models.dart
new file mode 100644
index 0000000..8c02d17
--- /dev/null
+++ b/lib/db/models.dart
@@ -0,0 +1,71 @@
+import 'package:drift/drift.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:timetable/constants/days.dart';
+import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/db/converters/time_of_day_converter.dart';
+import 'package:timetable/db/database.dart';
+
+class Subject extends Table {
+  IntColumn get id => integer().autoIncrement()();
+  TextColumn get label => text()();
+  TextColumn get location => text().nullable()();
+  TextColumn get note => text().nullable()();
+  IntColumn get color => integer()();
+  IntColumn get rotationWeek => intEnum<RotationWeeks>()();
+  IntColumn get day => intEnum<Days>()();
+  TextColumn get startTime => text().map(const TimeOfDayConverter())();
+  TextColumn get endTime => text().map(const TimeOfDayConverter())();
+}
+
+class SubjNotifier extends StateNotifier<List<SubjectData>> {
+  AppDatabase db;
+
+  SubjNotifier(this.db) : super([]) {
+    getSubjects();
+  }
+
+  Future<List<SubjectData>> getSubjects() async {
+    final subjects = await db.subject.select().get();
+    state = subjects;
+    return subjects;
+  }
+
+  Future addSubject(SubjectCompanion entry) async {
+    db.subject.insertOne(
+      SubjectCompanion.insert(
+        label: entry.label.value,
+        location: entry.location,
+        note: entry.note,
+        color: entry.color.value,
+        rotationWeek: entry.rotationWeek.value,
+        day: entry.day.value,
+        startTime: entry.startTime.value,
+        endTime: entry.endTime.value,
+      ),
+    );
+
+    state = await getSubjects();
+  }
+
+  Future updateSubject(SubjectData entry) async {
+    db.subject.update().replace(entry);
+
+    state = await getSubjects();
+  }
+
+  Future deleteSubject(SubjectData entry) async {
+    db.subject.deleteWhere((t) => t.id.equals(entry.id));
+
+    state = await getSubjects();
+  }
+
+  void resetData() {
+    db.subject.delete();
+
+    state = [];
+  }
+}
+
+final subjProvider = StateNotifierProvider<SubjNotifier, List<SubjectData>>(
+  (ref) => SubjNotifier(ref.watch(AppDatabase.provider)),
+);
diff --git a/lib/main.dart b/lib/main.dart
index 1d44fdb..d53207a 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,19 +1,13 @@
 import 'package:dynamic_color/dynamic_color.dart';
 import 'package:flutter/material.dart';
-import 'package:hive_flutter/hive_flutter.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:timetable/components/widgets/navigation_bar.dart';
 import 'package:timetable/constants/theme_options.dart';
 import 'package:timetable/models/settings.dart';
-import 'package:timetable/models/subjects.dart';
 import 'package:timetable/provider/themes.dart';
 
 void main() async {
-  await Hive.initFlutter();
-  Hive.registerAdapter(TimeOfDayAdapter());
-  Hive.registerAdapter(DaysAdapter());
-  Hive.registerAdapter(RotationWeeksAdapter());
-  Hive.registerAdapter(SubjectAdapter());
+  WidgetsFlutterBinding.ensureInitialized();
   runApp(
     const ProviderScope(
       child: Timetable(),
diff --git a/lib/models/days.g.dart b/lib/models/days.g.dart
deleted file mode 100644
index 6359ba1..0000000
--- a/lib/models/days.g.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-part of 'subjects.dart';
-
-class DaysAdapter extends TypeAdapter<Days> {
-  @override
-  final int typeId = 3;
-
-  @override
-  Days read(BinaryReader reader) {
-    final value = reader.readInt();
-    return Days.values[value];
-  }
-
-  @override
-  void write(BinaryWriter writer, Days obj) {
-    writer.writeInt(obj.index);
-  }
-}
diff --git a/lib/models/overlapping_subjects.dart b/lib/models/overlapping_subjects.dart
index 8110049..e8759a6 100644
--- a/lib/models/overlapping_subjects.dart
+++ b/lib/models/overlapping_subjects.dart
@@ -1,12 +1,12 @@
 import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:timetable/models/subjects.dart';
+import 'package:timetable/db/database.dart';
 
 /// A [StateNotifier] that holds the list of overlapping subjects.
-class OverlappingSubjects extends StateNotifier<List<List<Subject>>> {
+class OverlappingSubjects extends StateNotifier<List<List<SubjectData>>> {
   OverlappingSubjects() : super([]);
 }
 
 final overlappingSubjectsProvider =
-    StateNotifierProvider<OverlappingSubjects, List<List<Subject>>>(
+    StateNotifierProvider<OverlappingSubjects, List<List<SubjectData>>>(
   (ref) => OverlappingSubjects(),
 );
diff --git a/lib/models/rotationWeeks.g.dart b/lib/models/rotationWeeks.g.dart
deleted file mode 100644
index bd5f165..0000000
--- a/lib/models/rotationWeeks.g.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-part of 'subjects.dart';
-
-class RotationWeeksAdapter extends TypeAdapter<RotationWeeks> {
-  @override
-  final int typeId = 4;
-
-  @override
-  RotationWeeks read(BinaryReader reader) {
-    final value = reader.readInt();
-    return RotationWeeks.values[value];
-  }
-
-  @override
-  void write(BinaryWriter writer, RotationWeeks obj) {
-    writer.writeInt(obj.index);
-  }
-}
diff --git a/lib/models/subjects.dart b/lib/models/subjects.dart
deleted file mode 100644
index 09abfb5..0000000
--- a/lib/models/subjects.dart
+++ /dev/null
@@ -1,131 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:timetable/constants/days.dart';
-import 'package:hive/hive.dart';
-import 'package:timetable/constants/rotation_weeks.dart';
-
-part 'timeOfDay.g.dart';
-part 'days.g.dart';
-part 'subjects.g.dart';
-part 'rotationWeeks.g.dart';
-
-/// Subject data model.
-@immutable
-@HiveType(typeId: 1)
-class Subject {
-  @HiveField(0)
-  final String label;
-  @HiveField(1)
-  final String? location;
-  @HiveField(2)
-  final Color color;
-  @HiveField(3)
-  final TimeOfDay startTime;
-  @HiveField(4)
-  final TimeOfDay endTime;
-  @HiveField(5)
-  final Days day;
-  @HiveField(6)
-  final RotationWeeks rotationWeek;
-  @HiveField(7)
-  final String? note;
-
-  const Subject({
-    required this.label,
-    required this.location,
-    required this.color,
-    required this.startTime,
-    required this.endTime,
-    required this.day,
-    required this.rotationWeek,
-    required this.note,
-  });
-
-  Subject copyWith({
-    String? label,
-    String? location,
-    Color? color,
-    TimeOfDay? startTime,
-    TimeOfDay? endTime,
-    Days? day,
-    RotationWeeks? rotationWeek,
-    String? note,
-  }) {
-    return Subject(
-      label: label ?? this.label,
-      location: location ?? this.location,
-      color: color ?? this.color,
-      startTime: startTime ?? this.startTime,
-      endTime: endTime ?? this.endTime,
-      day: day ?? this.day,
-      rotationWeek: rotationWeek ?? this.rotationWeek,
-      note: note ?? this.note,
-    );
-  }
-}
-
-/// Subject's [StateNotifier].
-class SubjectNotifier extends StateNotifier<List<Subject>> {
-  SubjectNotifier() : super([]) {
-    loadData();
-  }
-
-  void loadData() async {
-    var box = await Hive.openBox<List<dynamic>>("subjectBox");
-
-    final subjects = box.get(0) ?? [];
-    state = [...subjects];
-  }
-
-  void addSubject(Subject subject) {
-    state = [...state, subject];
-    saveData();
-  }
-
-  void removeSubject(Subject subject, List<List<Subject>> overlappingSubjects) {
-    state = state.where((s) => s != subject).toList();
-    overlappingSubjects.removeWhere((e) => e.contains(subject));
-    saveData();
-  }
-
-  void resetData() async {
-    var box = await Hive.openBox<List<dynamic>>("subjectBox");
-
-    box.deleteAll(box.keys);
-    state = [];
-  }
-
-  void updateSubject(Subject oldSubject, Subject newSubject) {
-    state = [
-      for (final subject in state)
-        if (subject == oldSubject)
-          subject.copyWith(
-            label: newSubject.label,
-            location: newSubject.location,
-            color: newSubject.color,
-            startTime: newSubject.startTime,
-            endTime: newSubject.endTime,
-            day: newSubject.day,
-            rotationWeek: newSubject.rotationWeek,
-            note: newSubject.note,
-          )
-        else
-          subject,
-    ];
-    saveData();
-  }
-
-  void saveData() async {
-    var box = await Hive.openBox<List<dynamic>>("subjectBox");
-
-    try {
-      box.putAt(0, state);
-    } catch (e) {
-      box.add(state);
-    }
-  }
-}
-
-final subjectProvider = StateNotifierProvider<SubjectNotifier, List<Subject>>(
-  (ref) => SubjectNotifier(),
-);
diff --git a/lib/models/subjects.g.dart b/lib/models/subjects.g.dart
deleted file mode 100644
index f71493c..0000000
--- a/lib/models/subjects.g.dart
+++ /dev/null
@@ -1,56 +0,0 @@
-part of 'subjects.dart';
-
-class SubjectAdapter extends TypeAdapter<Subject> {
-  @override
-  final int typeId = 1;
-
-  @override
-  Subject read(BinaryReader reader) {
-    final numOfFields = reader.readByte();
-    final fields = <int, dynamic>{
-      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
-    };
-    return Subject(
-      label: fields[0] as String,
-      location: fields[1] as String?,
-      color: Color(fields[2] as int),
-      startTime: fields[3] as TimeOfDay,
-      endTime: fields[4] as TimeOfDay,
-      day: fields[5] as Days,
-      rotationWeek: fields[6] as RotationWeeks,
-      note: fields[7] as String?,
-    );
-  }
-
-  @override
-  void write(BinaryWriter writer, Subject obj) {
-    writer
-      ..writeByte(8)
-      ..writeByte(0)
-      ..write(obj.label)
-      ..writeByte(1)
-      ..write(obj.location)
-      ..writeByte(2)
-      ..write(obj.color.value)
-      ..writeByte(3)
-      ..write(obj.startTime)
-      ..writeByte(4)
-      ..write(obj.endTime)
-      ..writeByte(5)
-      ..write(obj.day)
-      ..writeByte(6)
-      ..write(obj.rotationWeek)
-      ..writeByte(7)
-      ..write(obj.note);
-  }
-
-  @override
-  int get hashCode => typeId.hashCode;
-
-  @override
-  bool operator ==(Object other) =>
-      identical(this, other) ||
-      other is SubjectAdapter &&
-          runtimeType == other.runtimeType &&
-          typeId == other.typeId;
-}
diff --git a/lib/models/timeOfDay.g.dart b/lib/models/timeOfDay.g.dart
deleted file mode 100644
index a40da47..0000000
--- a/lib/models/timeOfDay.g.dart
+++ /dev/null
@@ -1,25 +0,0 @@
-part of 'subjects.dart';
-
-class TimeOfDayAdapter extends TypeAdapter<TimeOfDay> {
-  @override
-  final typeId = 2;
-
-  @override
-  void write(BinaryWriter writer, TimeOfDay obj) {
-    writer
-      ..writeByte(2)
-      ..writeByte(0)
-      ..write(obj.hour)
-      ..writeByte(1)
-      ..write(obj.minute);
-  }
-
-  @override
-  TimeOfDay read(BinaryReader reader) {
-    var numOfFields = reader.readByte();
-    var fields = <int, dynamic>{
-      for (var i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
-    };
-    return TimeOfDay(hour: fields[0] as int, minute: fields[1] as int);
-  }
-}
diff --git a/lib/screens/timetable_screen.dart b/lib/screens/timetable_screen.dart
index dfebbfb..9545d99 100644
--- a/lib/screens/timetable_screen.dart
+++ b/lib/screens/timetable_screen.dart
@@ -7,6 +7,7 @@ import 'package:timetable/components/widgets/grid_day_views_toggle.dart';
 import 'package:timetable/components/widgets/navigation_bar_toggle.dart';
 import 'package:timetable/components/widgets/rotation_week_toggle.dart';
 import 'package:timetable/constants/rotation_weeks.dart';
+import 'package:timetable/db/models.dart';
 import 'package:timetable/models/settings.dart';
 
 /// The main screen, displays the default timetable view.
@@ -20,6 +21,8 @@ class TimetableScreen extends HookConsumerWidget {
     final isGridView = useState(true);
     final rotationWeek = useState(RotationWeeks.all);
 
+    final subject = ref.watch(subjProvider);
+
     return Scaffold(
       appBar: AppBar(
         leading: const NavbarToggle(),
@@ -37,9 +40,11 @@ class TimetableScreen extends HookConsumerWidget {
       body: isGridView.value
           ? TimetableGridView(
               rotationWeek: rotationWeek,
+              subject: subject,
             )
           : TimetableDayView(
               rotationWeek: rotationWeek,
+              subject: subject,
             ),
     );
   }
diff --git a/pubspec.lock b/pubspec.lock
index da23f48..590e0ff 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -5,18 +5,26 @@ packages:
     dependency: transitive
     description:
       name: _fe_analyzer_shared
-      sha256: eb376e9acf6938204f90eb3b1f00b578640d3188b4c8a8ec054f9f479af8d051
+      sha256: ae92f5d747aee634b87f89d9946000c2de774be1d6ac3e58268224348cd0101a
       url: "https://pub.dev"
     source: hosted
-    version: "64.0.0"
+    version: "61.0.0"
   analyzer:
-    dependency: transitive
+    dependency: "direct dev"
     description:
       name: analyzer
-      sha256: "69f54f967773f6c26c7dcb13e93d7ccee8b17a641689da39e878d5cf13b06893"
+      sha256: ea3d8652bda62982addfd92fdc2d0214e5f82e43325104990d4f4c4a2a313562
       url: "https://pub.dev"
     source: hosted
-    version: "6.2.0"
+    version: "5.13.0"
+  analyzer_plugin:
+    dependency: transitive
+    description:
+      name: analyzer_plugin
+      sha256: c1d5f167683de03d5ab6c3b53fc9aeefc5d59476e7810ba7bbddff50c6f4392d
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.11.2"
   animations:
     dependency: "direct main"
     description:
@@ -77,18 +85,18 @@ packages:
     dependency: transitive
     description:
       name: build_resolvers
-      sha256: d912852cce27c9e80a93603db721c267716894462e7033165178b91138587972
+      sha256: "339086358431fa15d7eca8b6a36e5d783728cf025e559b834f4609a1fcfb7b0a"
       url: "https://pub.dev"
     source: hosted
-    version: "2.3.2"
+    version: "2.4.2"
   build_runner:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: "10c6bcdbf9d049a0b666702cf1cee4ddfdc38f02a19d35ae392863b47519848b"
+      sha256: "67d591d602906ef9201caf93452495ad1812bea2074f04e25dbd7c133785821b"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.6"
+    version: "2.4.7"
   build_runner_core:
     dependency: transitive
     description:
@@ -121,6 +129,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      sha256: fb98c0f6d12c920a02ee2d998da788bca066ca5f148492b7085ee23372b12306
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.1"
   checked_yaml:
     dependency: transitive
     description:
@@ -129,6 +145,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.3"
+  cli_util:
+    dependency: transitive
+    description:
+      name: cli_util
+      sha256: c05b7406fdabc7a49a3929d4af76bcaccbbffcbcdcf185b082e1ae07da323d19
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.1"
   clock:
     dependency: transitive
     description:
@@ -149,10 +173,10 @@ packages:
     dependency: transitive
     description:
       name: collection
-      sha256: f092b211a4319e98e5ff58223576de6c2803db36221657b46c82574721240687
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.2"
+    version: "1.18.0"
   convert:
     dependency: transitive
     description:
@@ -173,10 +197,10 @@ packages:
     dependency: transitive
     description:
       name: dart_style
-      sha256: abd7625e16f51f554ea244d090292945ec4d4be7bfbaf2ec8cccea568919d334
+      sha256: "1efa911ca7086affd35f463ca2fc1799584fb6aa89883cf0af8e3664d6a02d55"
       url: "https://pub.dev"
     source: hosted
-    version: "2.3.3"
+    version: "2.3.2"
   device_info_plus:
     dependency: "direct main"
     description:
@@ -193,6 +217,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.0.0"
+  drift:
+    dependency: "direct main"
+    description:
+      name: drift
+      sha256: "05363b695885c72036ed5c76287125bfc6f1deda20cb3aa044a09fe22792f81b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.14.1"
+  drift_dev:
+    dependency: "direct dev"
+    description:
+      name: drift_dev
+      sha256: "50c14b8248d133d36b41c1b08ceed138be869b5b98ccaf3af16c9b88c7adc54e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.14.1"
   dynamic_color:
     dependency: "direct main"
     description:
@@ -304,30 +344,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.1"
-  hive:
-    dependency: "direct main"
-    description:
-      name: hive
-      sha256: "8dcf6db979d7933da8217edcec84e9df1bdb4e4edc7fc77dbd5aa74356d6d941"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.3"
-  hive_flutter:
-    dependency: "direct main"
-    description:
-      name: hive_flutter
-      sha256: dca1da446b1d808a51689fb5d0c6c9510c0a2ba01e22805d492c73b68e33eecc
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.0"
-  hive_generator:
-    dependency: "direct dev"
-    description:
-      name: hive_generator
-      sha256: "06cb8f58ace74de61f63500564931f9505368f45f98958bd7a6c35ba24159db4"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.1"
   hooks_riverpod:
     dependency: "direct main"
     description:
@@ -412,10 +428,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      sha256: a6e590c838b18133bb482a2745ad77c5bb7715fb0451209e1a7567d416678b8e
       url: "https://pub.dev"
     source: hosted
-    version: "1.9.1"
+    version: "1.10.0"
   mime:
     dependency: transitive
     description:
@@ -441,7 +457,7 @@ packages:
     source: hosted
     version: "2.1.0"
   path:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path
       sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
@@ -449,7 +465,7 @@ packages:
     source: hosted
     version: "1.8.3"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
       sha256: a1aa8aaa2542a6bc57e381f132af822420216c80d4781f7aa085ca3229208aaa
@@ -536,6 +552,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.3"
+  recase:
+    dependency: transitive
+    description:
+      name: recase
+      sha256: e4eb4ec2dcdee52dcf99cb4ceabaffc631d7424ee55e56f280bc039737f89213
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.0"
   riverpod:
     dependency: transitive
     description:
@@ -629,14 +653,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
-  source_helper:
-    dependency: transitive
-    description:
-      name: source_helper
-      sha256: "6adebc0006c37dd63fe05bca0a929b99f06402fc95aa35bf36d67f5c06de01fd"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.3.4"
   source_span:
     dependency: transitive
     description:
@@ -645,14 +661,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.0"
+  sqlite3:
+    dependency: "direct main"
+    description:
+      name: sqlite3
+      sha256: "8922805564b78eb7aa9386c10056d377a541ac7270dc6a1589176277ebb4d15d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  sqlite3_flutter_libs:
+    dependency: "direct main"
+    description:
+      name: sqlite3_flutter_libs
+      sha256: "3e3583b77cf888a68eae2e49ee4f025f66b86623ef0d83c297c8d903daa14871"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.18"
+  sqlparser:
+    dependency: transitive
+    description:
+      name: sqlparser
+      sha256: "877fcefabb725d120e31f54fa669a98c002db0feeaca6cea5354543f03b5e906"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.33.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
       url: "https://pub.dev"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
   state_notifier:
     dependency: transitive
     description:
@@ -665,10 +705,10 @@ packages:
     dependency: transitive
     description:
       name: stream_channel
-      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   stream_transform:
     dependency: transitive
     description:
@@ -697,10 +737,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "75760ffd7786fffdfb9597c35c5b27eaeec82be8edfb6d71d32651128ed7aab8"
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.0"
+    version: "0.6.1"
   timing:
     dependency: transitive
     description:
@@ -737,10 +777,10 @@ packages:
     dependency: transitive
     description:
       name: web
-      sha256: dc8ccd225a2005c1be616fe02951e2e342092edf968cf0844220383757ef8f10
+      sha256: afe077240a270dcfd2aafe77602b4113645af95d0ad31128cc02bce5ac5d5152
       url: "https://pub.dev"
     source: hosted
-    version: "0.1.4-beta"
+    version: "0.3.0"
   web_socket_channel:
     dependency: transitive
     description:
@@ -782,5 +822,5 @@ packages:
     source: hosted
     version: "3.1.2"
 sdks:
-  dart: ">=3.1.0 <4.0.0"
+  dart: ">=3.2.0 <4.0.0"
   flutter: ">=3.7.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index c47b3d7..5e6fa73 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -38,23 +38,25 @@ dependencies:
   flutter_hooks: ^0.20.1
   hooks_riverpod: ^2.3.10
   non_uniform_border: ^1.0.0
-  hive: ^2.2.3
-  hive_flutter: ^1.1.0
   device_info_plus: ^9.0.3
-  
+  drift: ^2.14.1
+  sqlite3_flutter_libs: ^0.5.18
+  path_provider: ^2.1.1
+  path: ^1.8.3
+  sqlite3: 
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  hive_generator:
-  build_runner:
-
+  build_runner: ^2.4.7
+  analyzer:
   # The "flutter_lints" package below contains a set of recommended lints to
   # encourage good coding practices. The lint set provided by the package is
   # activated in the `analysis_options.yaml` file located at the root of your
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^2.0.0
+  drift_dev: ^2.14.1
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec