prepare for multiple apps

apps/weblibre/lib/features/bangs/data/database/daos/bang.dart

@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2024-2026 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+import 'package:drift/drift.dart';
+import 'package:nullability/nullability.dart';
+import 'package:weblibre/features/bangs/data/database/daos/bang.drift.dart';
+import 'package:weblibre/features/bangs/data/database/database.dart';
+import 'package:weblibre/features/bangs/data/database/definitions.drift.dart';
+import 'package:weblibre/features/bangs/data/models/bang.dart';
+import 'package:weblibre/features/bangs/data/models/bang_data.dart';
+import 'package:weblibre/features/bangs/data/models/bang_group.dart';
+import 'package:weblibre/features/bangs/data/models/bang_key.dart';
+
+@DriftAccessor()
+class BangDao extends DatabaseAccessor<BangDatabase> with $BangDaoMixin {
+  BangDao(super.db);
+
+  Selectable<Bang> getBangList({Iterable<BangGroup>? groups}) {
+    final selectable = select(db.bang);
+    if (groups != null) {
+      selectable.where((t) => t.group.isInValues(groups));
+    }
+
+    return selectable;
+  }
+
+  SingleSelectable<int> getBangCount({Iterable<BangGroup>? groups}) {
+    return db.bang.count(
+      where: groups.mapNotNull(
+        (groups) =>
+            (t) => t.group.isInValues(groups),
+      ),
+    );
+  }
+
+  Future<int> upsertBang(Bang bang) {
+    return db.bang.insertOne(bang, mode: InsertMode.insertOrReplace);
+  }
+
+  SingleOrNullSelectable<BangData> getBangData(
+    BangGroup group,
+    String trigger,
+  ) {
+    return select(db.bangDataView)
+      ..where((t) => t.group.equalsValue(group) & t.trigger.equals(trigger));
+  }
+
+  Selectable<BangData> getBangDataList({
+    Iterable<String>? triggers,
+    Iterable<BangGroup>? groups,
+    String? domain,
+    String? category,
+    String? subCategory,
+    bool? orderMostFrequentFirst,
+  }) {
+    final selectable = select(db.bangDataView);
+    if (triggers != null) {
+      selectable.where((t) => t.trigger.isIn(triggers));
+    }
+    if (groups != null) {
+      selectable.where((t) => t.group.isInValues(groups));
+    }
+    if (domain != null) {
+      selectable.where((t) => t.domain.equals(domain));
+    }
+    if (category != null) {
+      selectable.where((t) => t.category.equals(category));
+
+      if (subCategory != null) {
+        selectable.where((t) => t.subCategory.equals(subCategory));
+      }
+    }
+
+    selectable.orderBy([
+      if (orderMostFrequentFirst == true) (t) => OrderingTerm.desc(t.frequency),
+      (t) => OrderingTerm.asc(t.websiteName),
+    ]);
+
+    return selectable;
+  }
+
+  Selectable<BangData> getFrequentBangDataList({Iterable<BangGroup>? groups}) {
+    final selectable = select(db.bangDataView)
+      ..where((t) => t.frequency.isBiggerThanValue(0));
+
+    if (groups != null) {
+      selectable.where((t) => t.group.isInValues(groups));
+    }
+
+    selectable.orderBy([
+      (t) => OrderingTerm.desc(t.frequency),
+      (t) => OrderingTerm.desc(t.lastUsed),
+    ]);
+
+    return selectable;
+  }
+
+  Future<int> increaseBangFrequency(BangKey key) {
+    return db.bangFrequency.insertOne(
+      BangFrequencyCompanion.insert(
+        trigger: key.trigger,
+        group: key.group,
+        frequency: 1,
+        lastUsed: DateTime.now(),
+      ),
+      onConflict: DoUpdate(
+        (old) => BangFrequencyCompanion.custom(
+          frequency: old.frequency + const Constant(1),
+          lastUsed: Variable(DateTime.now()),
+        ),
+      ),
+    );
+  }
+
+  Selectable<BangData> queryBangs(String searchString) {
+    final ftsQuery = db.buildFtsQuery(searchString);
+
+    if (ftsQuery.isNotEmpty) {
+      return db.definitionsDrift.queryBangs(query: ftsQuery);
+    } else {
+      return db.definitionsDrift.queryBangsBasic(
+        query: db.buildLikeQuery(searchString),
+      );
+    }
+  }
+
+  Future<int> addSearchEntry(
+    BangGroup group,
+    String trigger,
+    String searchQuery,
+  ) {
+    return db.bangHistory.insertOne(
+      BangHistoryCompanion.insert(
+        searchQuery: searchQuery,
+        trigger: trigger,
+        group: group,
+        searchDate: DateTime.now(),
+      ),
+      onConflict: DoUpdate(
+        target: [db.bangHistory.searchQuery],
+        (old) => BangHistoryCompanion(
+          trigger: Value(trigger),
+          group: Value(group),
+          searchDate: Value(DateTime.now()),
+        ),
+      ),
+    );
+  }
+
+  Future<int> removeSearchEntry(String searchQuery) {
+    return db.bangHistory.deleteWhere((t) => t.searchQuery.equals(searchQuery));
+  }
+}

apps/weblibre/lib/features/bangs/data/database/daos/bang.drift.dart

@@ -0,0 +1,13 @@
+// dart format width=80
+// ignore_for_file: type=lint
+import 'package:drift/drift.dart' as i0;
+import 'package:weblibre/features/bangs/data/database/database.dart' as i1;
+
+mixin $BangDaoMixin on i0.DatabaseAccessor<i1.BangDatabase> {
+  BangDaoManager get managers => BangDaoManager(this);
+}
+
+class BangDaoManager {
+  final $BangDaoMixin _db;
+  BangDaoManager(this._db);
+}

apps/weblibre/lib/features/bangs/data/database/daos/sync.dart

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2024-2026 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+import 'package:drift/drift.dart';
+import 'package:weblibre/features/bangs/data/database/daos/sync.drift.dart';
+import 'package:weblibre/features/bangs/data/database/database.dart';
+import 'package:weblibre/features/bangs/data/database/definitions.drift.dart';
+import 'package:weblibre/features/bangs/data/models/bang.dart';
+import 'package:weblibre/features/bangs/data/models/bang_group.dart';
+
+@DriftAccessor()
+class SyncDao extends DatabaseAccessor<BangDatabase> with $SyncDaoMixin {
+  SyncDao(super.db);
+
+  SingleOrNullSelectable<DateTime?> getLastSyncOfGroup(BangGroup group) {
+    final query = selectOnly(db.bangSync)
+      ..addColumns([db.bangSync.lastSync])
+      ..where(db.bangSync.group.equalsValue(group));
+
+    return query.map((row) => row.read(db.bangSync.lastSync));
+  }
+
+  Future<void> upsertLastSyncOfGroup(BangGroup group, DateTime lastSync) {
+    return db.bangSync.insertOne(
+      BangSyncCompanion.insert(group: Value(group), lastSync: lastSync),
+      onConflict: DoUpdate(
+        (old) => BangSyncCompanion(lastSync: Value(lastSync)),
+      ),
+    );
+  }
+
+  Future<void> insertBangs(Iterable<Bang> bangs) {
+    return db.bang.insertAll(bangs);
+  }
+
+  Future<void> replaceBangs(Iterable<Bang> bangs) {
+    return batch((batch) {
+      batch.replaceAll(db.bang, bangs);
+    });
+  }
+
+  Future<int> deleteBangs(BangGroup group, Iterable<String> triggers) {
+    final statement = delete(db.bang)
+      ..where((t) => t.group.equalsValue(group) & t.trigger.isIn(triggers));
+    return statement.go();
+  }
+
+  Future<void> syncBangs({
+    required BangGroup group,
+    required Iterable<Bang> remoteBangs,
+    required DateTime syncTime,
+  }) async {
+    final remoteBangMap = Map.fromEntries(
+      remoteBangs.map((e) => MapEntry(e.trigger, e)),
+    );
+    final localBangMap = await db.bangDao
+        .getBangList(groups: [group])
+        .get()
+        .then(
+          (bangs) => Map.fromEntries(bangs.map((e) => MapEntry(e.trigger, e))),
+        );
+
+    final remoteBangTriggers = remoteBangMap.keys.toSet();
+    final localBangTriggers = localBangMap.keys.toSet();
+
+    final removedBangs = localBangTriggers.difference(remoteBangTriggers);
+    final addedBangs = remoteBangTriggers
+        .difference(localBangTriggers)
+        .map((e) => remoteBangMap[e]!);
+
+    final changedBangs = remoteBangTriggers
+        .intersection(localBangTriggers)
+        .where((e) => remoteBangMap[e] != localBangMap[e])
+        .map((e) => remoteBangMap[e]!);
+
+    await db.transaction(() async {
+      await deleteBangs(group, removedBangs);
+      await insertBangs(addedBangs);
+      await replaceBangs(changedBangs);
+      await upsertLastSyncOfGroup(group, syncTime);
+    });
+  }
+}

apps/weblibre/lib/features/bangs/data/database/daos/sync.drift.dart

@@ -0,0 +1,13 @@
+// dart format width=80
+// ignore_for_file: type=lint
+import 'package:drift/drift.dart' as i0;
+import 'package:weblibre/features/bangs/data/database/database.dart' as i1;
+
+mixin $SyncDaoMixin on i0.DatabaseAccessor<i1.BangDatabase> {
+  SyncDaoManager get managers => SyncDaoManager(this);
+}
+
+class SyncDaoManager {
+  final $SyncDaoMixin _db;
+  SyncDaoManager(this._db);
+}

apps/weblibre/lib/features/bangs/data/database/database.dart

@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2024-2026 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+import 'package:drift/drift.dart';
+import 'package:drift/internal/versioned_schema.dart';
+import 'package:drift_dev/api/migrations_native.dart';
+import 'package:flutter/foundation.dart';
+import 'package:weblibre/features/bangs/data/database/daos/bang.dart';
+import 'package:weblibre/features/bangs/data/database/daos/sync.dart';
+import 'package:weblibre/features/bangs/data/database/database.drift.dart';
+import 'package:weblibre/features/bangs/data/database/database.steps.dart';
+import 'package:weblibre/features/bangs/data/database/definitions.drift.dart';
+import 'package:weblibre/features/search/domain/fts_tokenizer.dart';
+
+@DriftDatabase(include: {'definitions.drift'}, daos: [BangDao, SyncDao])
+class BangDatabase extends $BangDatabase with PrefixQueryBuilderMixin {
+  @override
+  final int schemaVersion = 5;
+
+  @override
+  final int ftsTokenLimit = 6;
+  @override
+  final int ftsMinTokenLength = 2;
+
+  @override
+  MigrationStrategy get migration => MigrationStrategy(
+    onUpgrade: (m, from, to) async {
+      // Following the advice from https://drift.simonbinder.eu/Migrations/api/#general-tips
+      await customStatement('PRAGMA foreign_keys = OFF');
+
+      await transaction(
+        () => VersionedSchema.runMigrationSteps(
+          migrator: m,
+          from: from,
+          to: to,
+          steps: _upgrade,
+        ),
+      );
+
+      if (kDebugMode) {
+        final wrongForeignKeys = await customSelect(
+          'PRAGMA foreign_key_check',
+        ).get();
+        assert(
+          wrongForeignKeys.isEmpty,
+          '${wrongForeignKeys.map((e) => e.data)}',
+        );
+      }
+
+      await customStatement('PRAGMA foreign_keys = ON');
+    },
+    beforeOpen: (details) async {
+      if (kDebugMode) {
+        // This check pulls in a fair amount of code that's not needed
+        // anywhere else, so we recommend only doing it in debug builds.
+        await validateDatabaseSchema();
+      }
+
+      if (details.hadUpgrade && details.versionBefore != null) {
+        await customStatement('PRAGMA foreign_keys = OFF');
+
+        if (details.versionBefore! < 3) {
+          await bang.deleteWhere((t) => t.group.equals(3));
+          await bangTriggers.deleteWhere((t) => t.group.equals(3));
+          await bangSync.deleteWhere((t) => t.group.equals(3));
+          await bangFrequency.deleteWhere((t) => t.group.equals(3));
+          await bangHistory.deleteWhere((t) => t.group.equals(3));
+        } else if (details.versionBefore! < 5) {
+          await bang.deleteWhere((t) => t.group.equals(1));
+          await bangTriggers.deleteWhere((t) => t.group.equals(1));
+          await bangSync.deleteWhere((t) => t.group.equals(1));
+          await bangFrequency.deleteWhere((t) => t.group.equals(1));
+          await bangHistory.deleteWhere((t) => t.group.equals(1));
+
+          await (bang.update()..where((t) => t.group.isBiggerThanValue(0)))
+              .write(
+                BangCompanion.custom(group: bang.group - const Constant(1)),
+              );
+          await (bangTriggers.update()
+                ..where((t) => t.group.isBiggerThanValue(0)))
+              .write(
+                BangTriggersCompanion.custom(
+                  group: bangTriggers.group - const Constant(1),
+                ),
+              );
+          await (bangSync.update()..where((t) => t.group.isBiggerThanValue(0)))
+              .write(
+                BangSyncCompanion.custom(
+                  group: bangSync.group - const Constant(1),
+                ),
+              );
+          await (bangFrequency.update()
+                ..where((t) => t.group.isBiggerThanValue(0)))
+              .write(
+                BangFrequencyCompanion.custom(
+                  group: bangFrequency.group - const Constant(1),
+                ),
+              );
+          await (bangHistory.update()
+                ..where((t) => t.group.isBiggerThanValue(0)))
+              .write(
+                BangHistoryCompanion.custom(
+                  group: bangHistory.group - const Constant(1),
+                ),
+              );
+        }
+      }
+
+      await customStatement('PRAGMA foreign_keys = ON');
+    },
+  );
+
+  BangDatabase(super.e);
+
+  static final _upgrade = migrationSteps(
+    from1To2: (m, schema) async {
+      //Too many changes, we switch to a new database
+    },
+    from2To3: (m, schema) async {
+      await m.addColumn(schema.bang, schema.bang.searxngApi);
+    },
+    from3To4: (m, schema) async {
+      await m.alterTable(TableMigration(schema.bangHistory));
+    },
+    from4To5: (m, schema) async {
+      await m.addColumn(schema.bang, schema.bang.snapDomain);
+    },
+  );
+}

apps/weblibre/lib/features/bangs/data/database/database.drift.dart

@@ -0,0 +1,200 @@
+// dart format width=80
+// ignore_for_file: type=lint
+import 'package:drift/drift.dart' as i0;
+import 'package:weblibre/features/bangs/data/database/definitions.drift.dart'
+    as i1;
+import 'package:weblibre/features/bangs/data/database/daos/bang.dart' as i2;
+import 'package:weblibre/features/bangs/data/database/database.dart' as i3;
+import 'package:weblibre/features/bangs/data/database/daos/sync.dart' as i4;
+import 'package:drift/internal/modular.dart' as i5;
+import 'package:sqlite3/common.dart' as i6;
+
+abstract class $BangDatabase extends i0.GeneratedDatabase {
+  $BangDatabase(i0.QueryExecutor e) : super(e);
+  $BangDatabaseManager get managers => $BangDatabaseManager(this);
+  late final i1.BangTable bang = i1.BangTable(this);
+  late final i1.BangTriggers bangTriggers = i1.BangTriggers(this);
+  late final i1.BangSync bangSync = i1.BangSync(this);
+  late final i1.BangFrequency bangFrequency = i1.BangFrequency(this);
+  late final i1.BangHistory bangHistory = i1.BangHistory(this);
+  late final i1.BangFts bangFts = i1.BangFts(this);
+  late final i1.BangTriggersFts bangTriggersFts = i1.BangTriggersFts(this);
+  late final i1.BangDataView bangDataView = i1.BangDataView(this);
+  late final i2.BangDao bangDao = i2.BangDao(this as i3.BangDatabase);
+  late final i4.SyncDao syncDao = i4.SyncDao(this as i3.BangDatabase);
+  i1.DefinitionsDrift get definitionsDrift => i5.ReadDatabaseContainer(
+    this,
+  ).accessor<i1.DefinitionsDrift>(i1.DefinitionsDrift.new);
+  @override
+  Iterable<i0.TableInfo<i0.Table, Object?>> get allTables =>
+      allSchemaEntities.whereType<i0.TableInfo<i0.Table, Object?>>();
+  @override
+  List<i0.DatabaseSchemaEntity> get allSchemaEntities => [
+    bang,
+    bangTriggers,
+    i1.idxBangTriggersLookup,
+    i1.bangTriggersAfterInsert,
+    i1.bangTriggersAfterUpdate,
+    bangSync,
+    bangFrequency,
+    bangHistory,
+    bangFts,
+    bangTriggersFts,
+    bangDataView,
+    i1.bangAfterInsert,
+    i1.bangAfterDelete,
+    i1.bangAfterUpdate,
+    i1.bangTriggersAfterInsertFts,
+    i1.bangTriggersAfterDeleteFts,
+    i1.bangTriggersAfterUpdateFts,
+  ];
+  @override
+  i0.StreamQueryUpdateRules
+  get streamUpdateRules => const i0.StreamQueryUpdateRules([
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.delete,
+      ),
+      result: [i0.TableUpdate('bang_triggers', kind: i0.UpdateKind.delete)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.insert,
+      ),
+      result: [i0.TableUpdate('bang_triggers', kind: i0.UpdateKind.insert)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.update,
+      ),
+      result: [
+        i0.TableUpdate('bang_triggers', kind: i0.UpdateKind.delete),
+        i0.TableUpdate('bang_triggers', kind: i0.UpdateKind.insert),
+      ],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.delete,
+      ),
+      result: [i0.TableUpdate('bang_frequency', kind: i0.UpdateKind.delete)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.delete,
+      ),
+      result: [i0.TableUpdate('bang_history', kind: i0.UpdateKind.delete)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.insert,
+      ),
+      result: [i0.TableUpdate('bang_fts', kind: i0.UpdateKind.insert)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.delete,
+      ),
+      result: [i0.TableUpdate('bang_fts', kind: i0.UpdateKind.insert)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang',
+        limitUpdateKind: i0.UpdateKind.update,
+      ),
+      result: [i0.TableUpdate('bang_fts', kind: i0.UpdateKind.insert)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang_triggers',
+        limitUpdateKind: i0.UpdateKind.insert,
+      ),
+      result: [i0.TableUpdate('bang_triggers_fts', kind: i0.UpdateKind.insert)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang_triggers',
+        limitUpdateKind: i0.UpdateKind.delete,
+      ),
+      result: [i0.TableUpdate('bang_triggers_fts', kind: i0.UpdateKind.insert)],
+    ),
+    i0.WritePropagation(
+      on: i0.TableUpdateQuery.onTableName(
+        'bang_triggers',
+        limitUpdateKind: i0.UpdateKind.update,
+      ),
+      result: [i0.TableUpdate('bang_triggers_fts', kind: i0.UpdateKind.insert)],
+    ),
+  ]);
+}
+
+class $BangDatabaseManager {
+  final $BangDatabase _db;
+  $BangDatabaseManager(this._db);
+  i1.$BangTableTableManager get bang =>
+      i1.$BangTableTableManager(_db, _db.bang);
+  i1.$BangTriggersTableManager get bangTriggers =>
+      i1.$BangTriggersTableManager(_db, _db.bangTriggers);
+  i1.$BangSyncTableManager get bangSync =>
+      i1.$BangSyncTableManager(_db, _db.bangSync);
+  i1.$BangFrequencyTableManager get bangFrequency =>
+      i1.$BangFrequencyTableManager(_db, _db.bangFrequency);
+  i1.$BangHistoryTableManager get bangHistory =>
+      i1.$BangHistoryTableManager(_db, _db.bangHistory);
+  i1.$BangFtsTableManager get bangFts =>
+      i1.$BangFtsTableManager(_db, _db.bangFts);
+  i1.$BangTriggersFtsTableManager get bangTriggersFts =>
+      i1.$BangTriggersFtsTableManager(_db, _db.bangTriggersFts);
+}
+
+extension DefineFunctions on i6.CommonDatabase {
+  void defineFunctions({
+    required String Function(int, String?) lexoRankNext,
+    required String Function(int, String?) lexoRankPrevious,
+    required String Function(String?, String?) lexoRankReorderAfter,
+    required String Function(String?, String?) lexoRankReorderBefore,
+  }) {
+    createFunction(
+      functionName: 'lexo_rank_next',
+      argumentCount: const i6.AllowedArgumentCount(2),
+      function: (args) {
+        final arg0 = args[0] as int;
+        final arg1 = args[1] as String?;
+        return lexoRankNext(arg0, arg1);
+      },
+    );
+    createFunction(
+      functionName: 'lexo_rank_previous',
+      argumentCount: const i6.AllowedArgumentCount(2),
+      function: (args) {
+        final arg0 = args[0] as int;
+        final arg1 = args[1] as String?;
+        return lexoRankPrevious(arg0, arg1);
+      },
+    );
+    createFunction(
+      functionName: 'lexo_rank_reorder_after',
+      argumentCount: const i6.AllowedArgumentCount(2),
+      function: (args) {
+        final arg0 = args[0] as String?;
+        final arg1 = args[1] as String?;
+        return lexoRankReorderAfter(arg0, arg1);
+      },
+    );
+    createFunction(
+      functionName: 'lexo_rank_reorder_before',
+      argumentCount: const i6.AllowedArgumentCount(2),
+      function: (args) {
+        final arg0 = args[0] as String?;
+        final arg1 = args[1] as String?;
+        return lexoRankReorderBefore(arg0, arg1);
+      },
+    );
+  }
+}

apps/weblibre/lib/features/bangs/data/database/definitions.drift

@@ -0,0 +1,295 @@
+import 'package:weblibre/features/bangs/data/database/drift/converters/bang_format.dart';
+import 'package:weblibre/features/bangs/data/database/drift/converters/trigger_list.dart';
+import 'package:weblibre/features/bangs/data/models/bang_data.dart';
+import 'package:weblibre/features/bangs/data/models/bang_group.dart';
+import 'package:weblibre/features/bangs/data/models/bang.dart';
+import 'package:weblibre/features/bangs/data/models/search_history_entry.dart';
+
+CREATE TABLE bang (
+  "trigger" TEXT NOT NULL,
+  "group" ENUM(BangGroup) NOT NULL,
+  website_name TEXT NOT NULL,
+  domain TEXT NOT NULL,
+  url_template TEXT NOT NULL,
+  category TEXT,
+  sub_category TEXT,
+  format TEXT MAPPED BY `const BangFormatConverter()`,
+  additional_triggers TEXT MAPPED BY `const TriggerListConverter()`,
+  searxng_api BOOL NOT NULL DEFAULT FALSE,
+  snap_domain TEXT,
+  PRIMARY KEY ("trigger", "group")
+) WITH Bang;
+
+CREATE TABLE bang_triggers (
+  "trigger" TEXT NOT NULL,
+  "group" ENUM(BangGroup) NOT NULL,
+  additional_trigger TEXT NOT NULL,
+  PRIMARY KEY ("trigger", "group", additional_trigger),
+  FOREIGN KEY ("trigger", "group") REFERENCES bang ("trigger", "group") ON DELETE CASCADE
+);
+CREATE INDEX idx_bang_triggers_lookup ON bang_triggers (additional_trigger, "group");
+
+-- Trigger to populate bang_triggers when inserting a new bang
+CREATE TRIGGER bang_triggers_after_insert AFTER INSERT ON bang 
+WHEN new.additional_triggers IS NOT NULL
+BEGIN
+  INSERT INTO bang_triggers("trigger", "group", additional_trigger)
+  SELECT 
+    new."trigger",
+    new."group",
+    json_each.value
+  FROM json_each(new.additional_triggers);
+END;
+
+-- Trigger to update bang_triggers when updating a bang
+CREATE TRIGGER bang_triggers_after_update AFTER UPDATE ON bang BEGIN
+  -- Delete old additional triggers
+  DELETE FROM bang_triggers 
+  WHERE "trigger" = old."trigger" AND "group" = old."group";
+
+  -- Insert new additional triggers if they exist
+  INSERT INTO bang_triggers("trigger", "group", additional_trigger)
+  SELECT 
+    new."trigger",
+    new."group",
+    json_each.value
+  FROM json_each(new.additional_triggers)
+  WHERE new.additional_triggers IS NOT NULL;
+END;
+
+CREATE TABLE bang_sync (
+  "group" ENUM(BangGroup) PRIMARY KEY NOT NULL,
+  last_sync DATETIME NOT NULL
+);
+
+CREATE TABLE bang_frequency (
+  "trigger" TEXT NOT NULL,
+  "group" ENUM(BangGroup) NOT NULL,
+  frequency INTEGER NOT NULL,
+  last_used DATETIME NOT NULL,
+  PRIMARY KEY ("trigger", "group"),
+  FOREIGN KEY ("trigger", "group") REFERENCES bang ("trigger", "group") ON DELETE CASCADE
+);
+
+CREATE TABLE bang_history (
+  search_query TEXT UNIQUE NOT NULL,
+  "trigger" TEXT NOT NULL,
+  "group" ENUM(BangGroup) NOT NULL,
+  search_date DATETIME NOT NULL,
+  FOREIGN KEY ("trigger", "group") REFERENCES bang ("trigger", "group") ON DELETE CASCADE
+);
+
+CREATE VIRTUAL TABLE bang_fts 
+	USING fts5(
+    trigger,
+    website_name,
+    content=bang,
+    prefix='2 3'
+  );
+
+CREATE VIRTUAL TABLE bang_triggers_fts 
+	USING fts5(
+    additional_trigger,
+    content=bang_triggers,
+    prefix='2 3'
+  );
+
+CREATE VIEW bang_data_view WITH BangData AS
+  SELECT
+    b.*,
+    bf.frequency,
+    bf.last_used
+  FROM
+    bang b
+  LEFT JOIN
+    bang_frequency bf ON b."trigger" = bf."trigger" AND b."group" = bf."group";
+
+-- Triggers to keep the FTS index up to date.
+CREATE TRIGGER bang_after_insert AFTER INSERT ON bang BEGIN
+  INSERT INTO 
+    bang_fts(rowid, "trigger", website_name) 
+    VALUES (new.rowid, new."trigger", new.website_name);
+END;
+CREATE TRIGGER bang_after_delete AFTER DELETE ON bang BEGIN
+  INSERT INTO 
+    bang_fts(bang_fts, rowid, "trigger", website_name) 
+    VALUES('delete', old.rowid, old."trigger", old.website_name);
+END;
+CREATE TRIGGER bang_after_update AFTER UPDATE ON bang BEGIN
+  INSERT INTO 
+    bang_fts(bang_fts, rowid, "trigger", website_name) 
+    VALUES('delete', old.rowid, old."trigger", old.website_name);
+  INSERT INTO 
+    bang_fts(rowid, "trigger", website_name) 
+    VALUES (new.rowid, new."trigger", new.website_name);
+END;
+
+CREATE TRIGGER bang_triggers_after_insert_fts AFTER INSERT ON bang_triggers BEGIN
+  INSERT INTO 
+    bang_triggers_fts(rowid, additional_trigger) 
+    VALUES (new.rowid, new.additional_trigger);
+END;
+CREATE TRIGGER bang_triggers_after_delete_fts AFTER DELETE ON bang_triggers BEGIN
+  INSERT INTO 
+    bang_triggers_fts(bang_triggers_fts, rowid, additional_trigger) 
+    VALUES('delete', old.rowid, old.additional_trigger);
+END;
+CREATE TRIGGER bang_triggers_after_update_fts AFTER UPDATE ON bang_triggers BEGIN
+  INSERT INTO 
+    bang_triggers_fts(bang_triggers_fts, rowid, additional_trigger) 
+    VALUES('delete', old.rowid, old.additional_trigger);
+  INSERT INTO 
+    bang_triggers_fts(rowid, additional_trigger) 
+    VALUES (new.rowid, new.additional_trigger);
+END;
+
+optimizeBangFtsIndex:
+  INSERT INTO bang_fts(bang_fts) VALUES ('optimize');
+
+optimizeTriggerFtsIndex:
+  INSERT INTO bang_triggers_fts(bang_triggers_fts) VALUES ('optimize');
+
+queryBangs WITH BangData:
+  WITH weights AS (
+    SELECT 
+      10.0 AS "trigger",
+      8.0 AS additional_trigger,
+      5.0 AS website_name
+  ),
+  bang_results AS (
+    SELECT 
+      b.*,
+      bf.frequency,
+      bf.last_used,
+      bm25(bang_fts, weights."trigger", weights.website_name) AS weighted_rank
+    FROM 
+      bang_fts(:query) fts
+    INNER JOIN
+      bang b ON b.rowid = fts.rowid
+    LEFT JOIN
+      bang_frequency bf ON b."trigger" = bf."trigger" AND b."group" = bf."group"
+    CROSS JOIN weights
+  ),
+  trigger_results AS (
+    SELECT 
+      b.*,
+      bf.frequency,
+      bf.last_used,
+      bm25(bang_triggers_fts, weights.additional_trigger) AS weighted_rank
+    FROM 
+      bang_triggers_fts(:query) tfts
+    INNER JOIN
+      bang_triggers bt ON bt.rowid = tfts.rowid
+    INNER JOIN
+      bang b ON b."trigger" = bt."trigger" AND b."group" = bt."group"
+    LEFT JOIN
+      bang_frequency bf ON b."trigger" = bf."trigger" AND b."group" = bf."group"
+    CROSS JOIN weights
+  ),
+  combined_results AS (
+    SELECT * FROM bang_results
+    UNION ALL
+    SELECT * FROM trigger_results
+  )
+  SELECT 
+    *,
+    MIN(weighted_rank) AS weighted_rank
+  FROM combined_results
+  GROUP BY "trigger", "group"
+  ORDER BY 
+    weighted_rank ASC,
+    frequency NULLS LAST;
+
+queryBangsBasic WITH BangData:
+  WITH weights AS (
+    SELECT 
+      10.0 AS "trigger",
+      8.0 AS additional_trigger,
+      5.0 AS website_name
+  ),
+  bang_results AS (
+    SELECT 
+      b.*,
+      bf.frequency,
+      bf.last_used,
+      bm25(bang_fts, weights."trigger", weights.website_name) AS weighted_rank
+    FROM 
+      bang_fts fts
+    INNER JOIN
+      bang b ON b.rowid = fts.rowid
+    LEFT JOIN
+      bang_frequency bf ON b."trigger" = bf."trigger" AND b."group" = bf."group"
+    CROSS JOIN weights
+    WHERE 
+      fts."trigger" LIKE :query OR
+      fts.website_name LIKE :query
+  ),
+  trigger_results AS (
+    SELECT 
+      b.*,
+      bf.frequency,
+      bf.last_used,
+      bm25(bang_triggers_fts, weights.additional_trigger) AS weighted_rank
+    FROM 
+      bang_triggers_fts tfts
+    INNER JOIN
+      bang_triggers bt ON bt.rowid = tfts.rowid
+    INNER JOIN
+      bang b ON b."trigger" = bt."trigger" AND b."group" = bt."group"
+    LEFT JOIN
+      bang_frequency bf ON b."trigger" = bf."trigger" AND b."group" = bf."group"
+    CROSS JOIN weights
+    WHERE 
+      tfts.additional_trigger LIKE :query
+  ),
+  combined_results AS (
+    SELECT * FROM bang_results
+    UNION ALL
+    SELECT * FROM trigger_results
+  )
+  SELECT 
+    *,
+    MIN(weighted_rank) AS weighted_rank
+  FROM combined_results
+  GROUP BY "trigger", "group"
+  ORDER BY 
+    weighted_rank ASC,
+    frequency NULLS LAST;
+
+categoriesJson:
+  WITH categories AS (
+    SELECT 
+      b.category, 
+      json_group_array(
+        DISTINCT b.sub_category 
+        ORDER BY b.sub_category
+      ) AS sub_categories
+    FROM 
+      bang b 
+    WHERE 
+      b.category IS NOT NULL AND 
+      b.sub_category IS NOT NULL
+    GROUP BY b.category
+    ORDER BY b.category
+  )
+  SELECT 
+    json_group_object(
+      c.category, 
+      json(c.sub_categories)
+    ) AS categories_json
+  FROM categories c;
+
+searchHistoryEntries WITH SearchHistoryEntry:
+  SELECT *
+  FROM bang_history 
+  ORDER BY search_date DESC
+  LIMIT :limit;  
+
+evictHistoryEntries:
+  DELETE FROM bang_history 
+  WHERE rowid IN (
+      SELECT rowid 
+      FROM bang_history 
+      ORDER BY search_date DESC 
+      LIMIT -1 OFFSET :limit
+  );

apps/weblibre/lib/features/bangs/data/database/drift/converters/bang_format.dart

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2024-2026 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+import 'dart:convert';
+
+import 'package:drift/drift.dart';
+import 'package:weblibre/features/bangs/data/models/bang.dart';
+
+class BangFormatConverter extends TypeConverter<Set<BangFormat>?, String?> {
+  const BangFormatConverter();
+
+  @override
+  Set<BangFormat>? fromSql(String? fromDb) {
+    if (fromDb == null) {
+      return null;
+    }
+
+    return Bang.decodeFormat(jsonDecode(fromDb) as List);
+  }
+
+  @override
+  String? toSql(Set<BangFormat>? value) {
+    if (value == null) {
+      return null;
+    }
+
+    return jsonEncode(Bang.encodeFormat(value));
+  }
+}

apps/weblibre/lib/features/bangs/data/database/drift/converters/trigger_list.dart

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2024-2026 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+import 'dart:convert';
+
+import 'package:drift/drift.dart';
+import 'package:nullability/nullability.dart';
+
+class TriggerListConverter extends TypeConverter<Set<String>?, String?> {
+  const TriggerListConverter();
+
+  @override
+  Set<String>? fromSql(String? fromDb) {
+    return fromDb.mapNotNull(
+      (value) => (jsonDecode(value) as List).cast<String>().toSet(),
+    );
+  }
+
+  @override
+  String? toSql(Set<String>? value) {
+    return value.mapNotNull((value) => jsonEncode(value.toList()));
+  }
+}