Reduce Code Duplication

- Extract localizedItemType() from `base_library_tab_screen.dart`
- Add localizedSources() and localizedExtensions() for browse_screen.dart
- Reduce if-statements in statistics_screen.dart
- Reduce if-statements in categories_screen.dart
- Reduce if-statements in browse_screen.dart

lib/modules/browse/browse_screen.dart

@@ -12,6 +12,7 @@ import 'package:mangayomi/modules/browse/extension/extension_screen.dart';
 import 'package:mangayomi/modules/browse/sources/sources_screen.dart';
 import 'package:mangayomi/modules/library/widgets/search_text_form_field.dart';
 import 'package:mangayomi/services/fetch_sources_list.dart';
+import 'package:mangayomi/utils/item_type_localization.dart';
 
 class BrowseScreen extends ConsumerStatefulWidget {
   const BrowseScreen({super.key});
@@ -20,19 +21,35 @@ class BrowseScreen extends ConsumerStatefulWidget {
   ConsumerState<BrowseScreen> createState() => _BrowseScreenState();
 }
 
+enum BrowseTabKind { sources, extensions }
+
+class BrowseTab {
+  final ItemType type;
+  final BrowseTabKind kind;
+
+  const BrowseTab(this.type, this.kind);
+}
+
 class _BrowseScreenState extends ConsumerState<BrowseScreen>
     with TickerProviderStateMixin {
   late final hideItems = ref.read(hideItemsStateProvider);
   final _textEditingController = TextEditingController();
   late TabController _tabBarController;
 
-  late final _tabList = [
-    if (!hideItems.contains("/MangaLibrary")) 'manga',
-    if (!hideItems.contains("/AnimeLibrary")) 'anime',
-    if (!hideItems.contains("/NovelLibrary")) 'novel',
-    if (!hideItems.contains("/MangaLibrary")) 'mangaExtension',
-    if (!hideItems.contains("/AnimeLibrary")) 'animeExtension',
-    if (!hideItems.contains("/NovelLibrary")) 'novelExtension',
+  late final List<BrowseTab> _tabList = [
+    if (!hideItems.contains("/MangaLibrary"))
+      BrowseTab(ItemType.manga, BrowseTabKind.sources),
+    if (!hideItems.contains("/AnimeLibrary"))
+      BrowseTab(ItemType.anime, BrowseTabKind.sources),
+    if (!hideItems.contains("/NovelLibrary"))
+      BrowseTab(ItemType.novel, BrowseTabKind.sources),
+
+    if (!hideItems.contains("/MangaLibrary"))
+      BrowseTab(ItemType.manga, BrowseTabKind.extensions),
+    if (!hideItems.contains("/AnimeLibrary"))
+      BrowseTab(ItemType.anime, BrowseTabKind.extensions),
+    if (!hideItems.contains("/NovelLibrary"))
+      BrowseTab(ItemType.novel, BrowseTabKind.extensions),
   ];
 
   @override
@@ -65,11 +82,8 @@ class _BrowseScreenState extends ConsumerState<BrowseScreen>
     if (_tabList.isEmpty) {
       return SizedBox.shrink();
     }
-    final containsExtensionTab = [
-      "mangaExtension",
-      "animeExtension",
-      "novelExtension",
-    ].any((element) => _tabList[_tabBarController.index] == element);
+    final currentTab = _tabList[_tabBarController.index];
+    final isExtensionTab = currentTab.kind == BrowseTabKind.extensions;
 
     final l10n = l10nLocalizations(context)!;
     return DefaultTabController(
@@ -102,9 +116,7 @@ class _BrowseScreenState extends ConsumerState<BrowseScreen>
                   )
                 : Row(
                     children: [
-                      if (_tabBarController.index == 3 ||
-                          _tabBarController.index == 4 ||
-                          _tabBarController.index == 5)
+                      if (isExtensionTab)
                         IconButton(
                           onPressed: () {
                             context.push('/createExtension');
@@ -117,26 +129,19 @@ class _BrowseScreenState extends ConsumerState<BrowseScreen>
                       IconButton(
                         splashRadius: 20,
                         onPressed: () {
-                          if (containsExtensionTab) {
+                          if (isExtensionTab) {
                             setState(() {
                               _isSearch = true;
                             });
                           } else {
                             context.push(
                               '/globalSearch',
-                              extra: (
-                                null,
-                                switch (_tabList[_tabBarController.index]) {
-                                  "manga" => ItemType.manga,
-                                  "anime" => ItemType.anime,
-                                  _ => ItemType.novel,
-                                },
-                              ),
+                              extra: (null, currentTab.type),
                             );
                           }
                         },
                         icon: Icon(
-                          !containsExtensionTab
+                          !isExtensionTab
                               ? Icons.travel_explore_rounded
                               : Icons.search_rounded,
                           color: Theme.of(context).hintColor,
@@ -148,16 +153,12 @@ class _BrowseScreenState extends ConsumerState<BrowseScreen>
               splashRadius: 20,
               onPressed: () {
                 context.push(
-                  containsExtensionTab ? '/ExtensionLang' : '/sourceFilter',
-                  extra: switch (_tabList[_tabBarController.index]) {
-                    "manga" || "mangaExtension" => ItemType.manga,
-                    "anime" || "animeExtension" => ItemType.anime,
-                    _ => ItemType.novel,
-                  },
+                  isExtensionTab ? '/ExtensionLang' : '/sourceFilter',
+                  extra: currentTab.type,
                 );
               },
               icon: Icon(
-                !containsExtensionTab
+                !isExtensionTab
                     ? Icons.filter_list_sharp
                     : Icons.translate_rounded,
                 color: Theme.of(context).hintColor,
@@ -168,86 +169,43 @@ class _BrowseScreenState extends ConsumerState<BrowseScreen>
             indicatorSize: TabBarIndicatorSize.label,
             isScrollable: true,
             controller: _tabBarController,
-            tabs: [
-              if (!hideItems.contains("/MangaLibrary"))
-                Tab(text: l10n.manga_sources),
-              if (!hideItems.contains("/AnimeLibrary"))
-                Tab(text: l10n.anime_sources),
-              if (!hideItems.contains("/NovelLibrary"))
-                Tab(text: l10n.novel_sources),
-              if (!hideItems.contains("/MangaLibrary"))
-                Tab(
-                  child: Row(
-                    children: [
-                      Text(l10n.manga_extensions),
+            tabs: _tabList.map((tab) {
+              final type = tab.type;
+              final isExt = tab.kind == BrowseTabKind.extensions;
+
+              return Tab(
+                child: Row(
+                  children: [
+                    Text(
+                      isExt
+                          ? localizedExtensions(type, l10n)
+                          : localizedSources(type, l10n),
+                    ),
+                    if (isExt) ...[
                       const SizedBox(width: 8),
-                      _extensionUpdateNumbers(ref, ItemType.manga),
+                      _extensionUpdateNumbers(ref, type),
                     ],
-                  ),
+                  ],
                 ),
-              if (!hideItems.contains("/AnimeLibrary"))
-                Tab(
-                  child: Row(
-                    children: [
-                      Text(l10n.anime_extensions),
-                      const SizedBox(width: 8),
-                      _extensionUpdateNumbers(ref, ItemType.anime),
-                    ],
-                  ),
-                ),
-              if (!hideItems.contains("/NovelLibrary"))
-                Tab(
-                  child: Row(
-                    children: [
-                      Text(l10n.novel_extensions),
-                      const SizedBox(width: 8),
-                      _extensionUpdateNumbers(ref, ItemType.novel),
-                    ],
-                  ),
-                ),
-            ],
+              );
+            }).toList(),
           ),
         ),
         body: TabBarView(
           controller: _tabBarController,
-          children: [
-            if (!hideItems.contains("/MangaLibrary"))
-              SourcesScreen(
-                itemType: ItemType.manga,
-                tabIndex: (index) {
-                  _tabBarController.animateTo(index);
-                },
-              ),
-            if (!hideItems.contains("/AnimeLibrary"))
-              SourcesScreen(
-                itemType: ItemType.anime,
-                tabIndex: (index) {
-                  _tabBarController.animateTo(index);
-                },
-              ),
-            if (!hideItems.contains("/NovelLibrary"))
-              SourcesScreen(
-                itemType: ItemType.novel,
-                tabIndex: (index) {
-                  _tabBarController.animateTo(index);
-                },
-              ),
-            if (!hideItems.contains("/MangaLibrary"))
-              ExtensionScreen(
+          children: _tabList.map((tab) {
+            if (tab.kind == BrowseTabKind.sources) {
+              return SourcesScreen(
+                itemType: tab.type,
+                tabIndex: (index) => _tabBarController.animateTo(index),
+              );
+            } else {
+              return ExtensionScreen(
                 query: _textEditingController.text,
-                itemType: ItemType.manga,
-              ),
-            if (!hideItems.contains("/AnimeLibrary"))
-              ExtensionScreen(
-                query: _textEditingController.text,
-                itemType: ItemType.anime,
-              ),
-            if (!hideItems.contains("/NovelLibrary"))
-              ExtensionScreen(
-                query: _textEditingController.text,
-                itemType: ItemType.novel,
-              ),
-          ],
+                itemType: tab.type,
+              );
+            }
+          }).toList(),
         ),
       ),
     );

lib/modules/more/categories/categories_screen.dart

@@ -11,6 +11,7 @@ import 'package:mangayomi/modules/more/settings/reader/providers/reader_state_pr
 import 'package:mangayomi/modules/more/settings/sync/providers/sync_providers.dart';
 import 'package:mangayomi/modules/widgets/progress_center.dart';
 import 'package:mangayomi/providers/l10n_providers.dart';
+import 'package:mangayomi/utils/item_type_localization.dart';
 import 'package:super_sliver_list/super_sliver_list.dart';
 
 class CategoriesScreen extends ConsumerStatefulWidget {
@@ -24,17 +25,20 @@ class CategoriesScreen extends ConsumerStatefulWidget {
 class _CategoriesScreenState extends ConsumerState<CategoriesScreen>
     with TickerProviderStateMixin {
   late TabController _tabBarController;
-  late final List<String> _tabList;
+  late final List<ItemType> _visibleTabTypes;
   @override
   void initState() {
     super.initState();
     final hideItems = ref.read(hideItemsStateProvider);
-    _tabList = [
-      if (!hideItems.contains("/MangaLibrary")) "/MangaLibrary",
-      if (!hideItems.contains("/AnimeLibrary")) "/AnimeLibrary",
-      if (!hideItems.contains("/NovelLibrary")) "/NovelLibrary",
+    _visibleTabTypes = [
+      if (!hideItems.contains("/MangaLibrary")) ItemType.manga,
+      if (!hideItems.contains("/AnimeLibrary")) ItemType.anime,
+      if (!hideItems.contains("/NovelLibrary")) ItemType.novel,
     ];
-    _tabBarController = TabController(length: _tabList.length, vsync: this);
+    _tabBarController = TabController(
+      length: _visibleTabTypes.length,
+      vsync: this,
+    );
     _tabBarController.animateTo(widget.data.$2);
   }
 
@@ -46,7 +50,7 @@ class _CategoriesScreenState extends ConsumerState<CategoriesScreen>
 
   @override
   Widget build(BuildContext context) {
-    if (_tabList.isEmpty) {
+    if (_visibleTabTypes.isEmpty) {
       return Scaffold(
         appBar: AppBar(title: Text(context.l10n.categories)),
         body: Center(child: Text("EMPTY\nMPTY\nMTY\nMT\n\n")),
@@ -55,7 +59,7 @@ class _CategoriesScreenState extends ConsumerState<CategoriesScreen>
     final l10n = l10nLocalizations(context)!;
     return DefaultTabController(
       animationDuration: Duration.zero,
-      length: _tabList.length,
+      length: _visibleTabTypes.length,
       child: Scaffold(
         appBar: AppBar(
           elevation: 0,
@@ -67,23 +71,15 @@ class _CategoriesScreenState extends ConsumerState<CategoriesScreen>
           bottom: TabBar(
             indicatorSize: TabBarIndicatorSize.label,
             controller: _tabBarController,
-            tabs: _tabList.map((route) {
-              if (route == "/MangaLibrary") return Tab(text: l10n.manga);
-              if (route == "/AnimeLibrary") return Tab(text: l10n.anime);
-              return Tab(text: l10n.novel);
+            tabs: _visibleTabTypes.map((type) {
+              return Tab(text: localizedItemType(type, l10n));
             }).toList(),
           ),
         ),
         body: TabBarView(
           controller: _tabBarController,
-          children: _tabList.map((route) {
-            if (route == "/MangaLibrary") {
-              return CategoriesTab(itemType: ItemType.manga);
-            }
-            if (route == "/AnimeLibrary") {
-              return CategoriesTab(itemType: ItemType.anime);
-            }
-            return CategoriesTab(itemType: ItemType.novel);
+          children: _visibleTabTypes.map((type) {
+            return CategoriesTab(itemType: type);
           }).toList(),
         ),
       ),

lib/modules/more/statistics/statistics_screen.dart

@@ -5,6 +5,7 @@ import 'package:mangayomi/modules/more/settings/reader/providers/reader_state_pr
 import 'package:mangayomi/modules/more/statistics/statistics_provider.dart';
 import 'package:mangayomi/providers/l10n_providers.dart';
 import 'package:mangayomi/utils/extensions/build_context_extensions.dart';
+import 'package:mangayomi/utils/item_type_localization.dart';
 
 class StatisticsScreen extends ConsumerStatefulWidget {
   const StatisticsScreen({super.key});
@@ -17,18 +18,21 @@ class _StatisticsScreenState extends ConsumerState<StatisticsScreen>
     with SingleTickerProviderStateMixin {
   late final List<String> hideItems;
   late TabController _tabController;
-  late final List<String> _tabList;
+  late final List<ItemType> _visibleTabTypes;
 
   @override
   void initState() {
     super.initState();
     hideItems = ref.read(hideItemsStateProvider);
-    _tabList = [
-      if (!hideItems.contains("/MangaLibrary")) "/MangaLibrary",
-      if (!hideItems.contains("/AnimeLibrary")) "/AnimeLibrary",
-      if (!hideItems.contains("/NovelLibrary")) "/NovelLibrary",
+    _visibleTabTypes = [
+      if (!hideItems.contains("/MangaLibrary")) ItemType.manga,
+      if (!hideItems.contains("/AnimeLibrary")) ItemType.anime,
+      if (!hideItems.contains("/NovelLibrary")) ItemType.novel,
     ];
-    _tabController = TabController(length: _tabList.length, vsync: this);
+    _tabController = TabController(
+      length: _visibleTabTypes.length,
+      vsync: this,
+    );
   }
 
   @override
@@ -39,7 +43,7 @@ class _StatisticsScreenState extends ConsumerState<StatisticsScreen>
 
   @override
   Widget build(BuildContext context) {
-    if (_tabList.isEmpty) {
+    if (_visibleTabTypes.isEmpty) {
       return Scaffold(
         appBar: AppBar(title: Text(context.l10n.statistics)),
         body: Center(child: Text("EMPTY\nMPTY\nMTY\nMT\n\n")),
@@ -51,23 +55,15 @@ class _StatisticsScreenState extends ConsumerState<StatisticsScreen>
         title: Text(l10n.statistics),
         bottom: TabBar(
           controller: _tabController,
-          tabs: _tabList.map((route) {
-            if (route == "/MangaLibrary") return Tab(text: l10n.manga);
-            if (route == "/AnimeLibrary") return Tab(text: l10n.anime);
-            return Tab(text: l10n.novel);
+          tabs: _visibleTabTypes.map((type) {
+            return Tab(text: localizedItemType(type, l10n));
           }).toList(),
         ),
       ),
       body: TabBarView(
         controller: _tabController,
-        children: _tabList.map((route) {
-          if (route == "/MangaLibrary") {
-            return _buildStatisticsTab(itemType: ItemType.manga);
-          }
-          if (route == "/AnimeLibrary") {
-            return _buildStatisticsTab(itemType: ItemType.anime);
-          }
-          return _buildStatisticsTab(itemType: ItemType.novel);
+        children: _visibleTabTypes.map((type) {
+          return _buildStatisticsTab(itemType: type);
         }).toList(),
       ),
     );

lib/modules/widgets/base_library_tab_screen.dart

@@ -4,6 +4,7 @@ import 'package:mangayomi/models/manga.dart';
 import 'package:mangayomi/modules/library/widgets/search_text_form_field.dart';
 import 'package:mangayomi/modules/more/settings/reader/providers/reader_state_provider.dart';
 import 'package:mangayomi/providers/l10n_providers.dart';
+import 'package:mangayomi/utils/item_type_localization.dart';
 
 abstract class BaseLibraryTabScreenState<T extends ConsumerStatefulWidget>
     extends ConsumerState<T>
@@ -61,17 +62,6 @@ abstract class BaseLibraryTabScreenState<T extends ConsumerStatefulWidget>
   @override
   Widget build(BuildContext context) {
     final l10n = l10nLocalizations(context)!;
-    String localizedItemType(ItemType type) {
-      switch (type) {
-        case ItemType.manga:
-          return l10n.manga;
-        case ItemType.anime:
-          return l10n.anime;
-        case ItemType.novel:
-          return l10n.novel;
-      }
-    }
-
     return Scaffold(
       appBar: AppBar(
         elevation: 0,
@@ -104,7 +94,7 @@ abstract class BaseLibraryTabScreenState<T extends ConsumerStatefulWidget>
           controller: tabController,
           indicatorSize: TabBarIndicatorSize.tab,
           tabs: visibleTabTypes.map((type) {
-            return buildTabLabel(type, localizedItemType(type));
+            return buildTabLabel(type, localizedItemType(type, l10n));
           }).toList(),
         ),
       ),

lib/utils/item_type_localization.dart

@@ -0,0 +1,35 @@
+import 'package:mangayomi/l10n/generated/app_localizations.dart';
+import 'package:mangayomi/models/manga.dart';
+
+String localizedItemType(ItemType type, AppLocalizations l10n) {
+  switch (type) {
+    case ItemType.manga:
+      return l10n.manga;
+    case ItemType.anime:
+      return l10n.anime;
+    case ItemType.novel:
+      return l10n.novel;
+  }
+}
+
+String localizedSources(ItemType type, AppLocalizations l10n) {
+  switch (type) {
+    case ItemType.manga:
+      return l10n.manga_sources;
+    case ItemType.anime:
+      return l10n.anime_sources;
+    case ItemType.novel:
+      return l10n.novel_sources;
+  }
+}
+
+String localizedExtensions(ItemType type, AppLocalizations l10n) {
+  switch (type) {
+    case ItemType.manga:
+      return l10n.manga_extensions;
+    case ItemType.anime:
+      return l10n.anime_extensions;
+    case ItemType.novel:
+      return l10n.novel_extensions;
+  }
+}