Custom link support (#918)

lib/pages/add_app.dart

@@ -1,3 +1,5 @@
+import 'dart:math';
+
 import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -21,10 +23,10 @@ class AddAppPage extends StatefulWidget {
   const AddAppPage({super.key});
 
   @override
-  State<AddAppPage> createState() => _AddAppPageState();
+  State<AddAppPage> createState() => AddAppPageState();
 }
 
-class _AddAppPageState extends State<AddAppPage> {
+class AddAppPageState extends State<AddAppPage> {
   bool gettingAppInfo = false;
   bool searching = false;
 
@@ -36,9 +38,57 @@ class _AddAppPageState extends State<AddAppPage> {
   bool additionalSettingsValid = true;
   bool inferAppIdIfOptional = true;
   List<String> pickedCategories = [];
-  int searchnum = 0;
   SourceProvider sourceProvider = SourceProvider();
 
+  linkFn(String input) {
+    try {
+      if (input.isEmpty) {
+        throw UnsupportedURLError();
+      }
+      sourceProvider.getSource(input);
+      changeUserInput(input, true, false);
+    } catch (e) {
+      showError(e, context);
+    }
+  }
+
+  changeUserInput(String input, bool valid, bool isBuilding) {
+    userInput = input;
+    if (!isBuilding) {
+      setState(() {
+        var prevHost = pickedSource?.host;
+        try {
+          var naturalSource =
+              valid ? sourceProvider.getSource(userInput) : null;
+          if (naturalSource != null &&
+              naturalSource.runtimeType.toString() !=
+                  HTML().runtimeType.toString()) {
+            // If input has changed to match a regular source, reset the override
+            pickedSourceOverride = null;
+          }
+        } catch (e) {
+          // ignore
+        }
+        var source = valid
+            ? sourceProvider.getSource(userInput,
+                overrideSource: pickedSourceOverride)
+            : null;
+        if (pickedSource.runtimeType != source.runtimeType ||
+            (prevHost != null && prevHost != source?.host)) {
+          pickedSource = source;
+          additionalSettings = source != null
+              ? getDefaultValuesFromFormItems(
+                  source.combinedAppSpecificSettingFormItems)
+              : {};
+          additionalSettingsValid = source != null
+              ? !sourceProvider.ifRequiredAppSpecificSettingsExist(source)
+              : true;
+          inferAppIdIfOptional = true;
+        }
+      });
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     AppsProvider appsProvider = context.read<AppsProvider>();
@@ -48,47 +98,6 @@ class _AddAppPageState extends State<AddAppPage> {
 
     bool doingSomething = gettingAppInfo || searching;
 
-    changeUserInput(String input, bool valid, bool isBuilding,
-        {bool isSearch = false}) {
-      userInput = input;
-      if (!isBuilding) {
-        setState(() {
-          if (isSearch) {
-            searchnum++;
-          }
-          var prevHost = pickedSource?.host;
-          try {
-            var naturalSource =
-                valid ? sourceProvider.getSource(userInput) : null;
-            if (naturalSource != null &&
-                naturalSource.runtimeType.toString() !=
-                    HTML().runtimeType.toString()) {
-              // If input has changed to match a regular source, reset the override
-              pickedSourceOverride = null;
-            }
-          } catch (e) {
-            // ignore
-          }
-          var source = valid
-              ? sourceProvider.getSource(userInput,
-                  overrideSource: pickedSourceOverride)
-              : null;
-          if (pickedSource.runtimeType != source.runtimeType ||
-              (prevHost != null && prevHost != source?.host)) {
-            pickedSource = source;
-            additionalSettings = source != null
-                ? getDefaultValuesFromFormItems(
-                    source.combinedAppSpecificSettingFormItems)
-                : {};
-            additionalSettingsValid = source != null
-                ? !sourceProvider.ifRequiredAppSpecificSettingsExist(source)
-                : true;
-            inferAppIdIfOptional = true;
-          }
-        });
-      }
-    }
-
     Future<bool> getTrackOnlyConfirmationIfNeeded(bool userPickedTrackOnly,
         {bool ignoreHideSetting = false}) async {
       var useTrackOnly = userPickedTrackOnly || pickedSource!.enforceTrackOnly;
@@ -205,7 +214,7 @@ class _AddAppPageState extends State<AddAppPage> {
           children: [
             Expanded(
                 child: GeneratedForm(
-                    key: Key(searchnum.toString()),
+                    key: Key(Random().nextInt(10000).toString()),
                     items: [
                       [
                         GeneratedFormTextField('appSourceURL',
@@ -325,7 +334,7 @@ class _AddAppPageState extends State<AddAppPage> {
                     );
                   });
           if (selectedUrls != null && selectedUrls.isNotEmpty) {
-            changeUserInput(selectedUrls[0], true, false, isSearch: true);
+            changeUserInput(selectedUrls[0], true, false);
           }
         }
       } catch (e) {

lib/pages/home.dart

@@ -1,4 +1,7 @@
+import 'dart:async';
+
 import 'package:animations/animations.dart';
+import 'package:app_links/app_links.dart';
 import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -30,53 +33,95 @@ class _HomePageState extends State<HomePage> {
   bool isReversing = false;
   int prevAppCount = -1;
   bool prevIsLoading = true;
+  late AppLinks _appLinks;
+  StreamSubscription<Uri>? _linkSubscription;
 
   List<NavigationPageItem> pages = [
     NavigationPageItem(tr('appsString'), Icons.apps,
         AppsPage(key: GlobalKey<AppsPageState>())),
-    NavigationPageItem(tr('addApp'), Icons.add, const AddAppPage()),
+    NavigationPageItem(
+        tr('addApp'), Icons.add, AddAppPage(key: GlobalKey<AddAppPageState>())),
     NavigationPageItem(
         tr('importExport'), Icons.import_export, const ImportExportPage()),
     NavigationPageItem(tr('settings'), Icons.settings, const SettingsPage())
   ];
 
+  @override
+  void initState() {
+    super.initState();
+    initDeepLinks();
+  }
+
+  Future<void> initDeepLinks() async {
+    _appLinks = AppLinks();
+
+    goToAddApp(Uri uri) async {
+      switchToPage(1);
+      while (
+          (pages[1].widget.key as GlobalKey<AddAppPageState>?)?.currentState ==
+              null) {
+        await Future.delayed(const Duration(microseconds: 1));
+      }
+      (pages[1].widget.key as GlobalKey<AddAppPageState>?)
+          ?.currentState
+          ?.linkFn(uri.path.length > 1 ? uri.path.substring(1) : "");
+    }
+
+    // Check initial link if app was in cold state (terminated)
+    final appLink = await _appLinks.getInitialAppLink();
+    if (appLink != null) {
+      await goToAddApp(appLink);
+    }
+
+    // Handle link when app is in warm state (front or background)
+    _linkSubscription = _appLinks.uriLinkStream.listen((uri) async {
+      await goToAddApp(uri);
+    });
+  }
+
+  setIsReversing(int targetIndex) {
+    bool reversing = selectedIndexHistory.isNotEmpty &&
+        selectedIndexHistory.last > targetIndex;
+    setState(() {
+      isReversing = reversing;
+    });
+  }
+
+  switchToPage(int index) async {
+    setIsReversing(index);
+    if (index == 0) {
+      while ((pages[0].widget.key as GlobalKey<AppsPageState>).currentState !=
+          null) {
+        // Avoid duplicate GlobalKey error
+        await Future.delayed(const Duration(microseconds: 1));
+      }
+      setState(() {
+        selectedIndexHistory.clear();
+      });
+    } else if (selectedIndexHistory.isEmpty ||
+        (selectedIndexHistory.isNotEmpty &&
+            selectedIndexHistory.last != index)) {
+      // while (index == 1 &&
+      //     (pages[0].widget.key as GlobalKey<AppsPageState>).currentState !=
+      //         null) {
+      //   // Avoid duplicate GlobalKey error
+      //   await Future.delayed(const Duration(microseconds: 1));
+      // }
+      setState(() {
+        int existingInd = selectedIndexHistory.indexOf(index);
+        if (existingInd >= 0) {
+          selectedIndexHistory.removeAt(existingInd);
+        }
+        selectedIndexHistory.add(index);
+      });
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     AppsProvider appsProvider = context.watch<AppsProvider>();
     SettingsProvider settingsProvider = context.watch<SettingsProvider>();
 
-    setIsReversing(int targetIndex) {
-      bool reversing = selectedIndexHistory.isNotEmpty &&
-          selectedIndexHistory.last > targetIndex;
-      setState(() {
-        isReversing = reversing;
-      });
-    }
-
-    switchToPage(int index) async {
-      setIsReversing(index);
-      if (index == 0) {
-        while ((pages[0].widget.key as GlobalKey<AppsPageState>).currentState !=
-            null) {
-          // Avoid duplicate GlobalKey error
-          await Future.delayed(const Duration(microseconds: 1));
-        }
-        setState(() {
-          selectedIndexHistory.clear();
-        });
-      } else if (selectedIndexHistory.isEmpty ||
-          (selectedIndexHistory.isNotEmpty &&
-              selectedIndexHistory.last != index)) {
-        setState(() {
-          int existingInd = selectedIndexHistory.indexOf(index);
-          if (existingInd >= 0) {
-            selectedIndexHistory.removeAt(existingInd);
-          }
-          selectedIndexHistory.add(index);
-        });
-      }
-    }
-
     if (!prevIsLoading &&
         prevAppCount >= 0 &&
         appsProvider.apps.length > prevAppCount &&
@@ -143,4 +188,10 @@ class _HomePageState extends State<HomePage> {
               ?.clearSelected();
         });
   }
+
+  @override
+  void dispose() {
+    super.dispose();
+    _linkSubscription?.cancel();
+  }
 }