improve uri parsing for urls without scheme

app/lib/features/share_intent/domain/entities/shared_content.dart

@@ -4,7 +4,8 @@ sealed class SharedContent {
   const SharedContent();
 
   factory SharedContent.parse(String content) {
-    if (uri_parser.tryParseUrl(content) case final Uri uri) {
+    if (uri_parser.tryParseUrl(content, eagerParsing: true)
+        case final Uri uri) {
       return SharedUrl(uri);
     } else {
       return SharedText(content);

app/lib/features/web_view/presentation/widgets/web_page_dialog.dart

@@ -20,6 +20,7 @@ import 'package:flutter_inappwebview/flutter_inappwebview.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:share_plus/share_plus.dart';
+import 'package:bang_navigator/utils/uri_parser.dart' as uri_parser;
 
 class LoadingWebPageDialog extends HookConsumerWidget {
   final Uri url;
@@ -125,9 +126,10 @@ class WebPageDialog extends HookConsumerWidget {
                                   await webViewController!.loadUrl(
                                     urlRequest: URLRequest(
                                       url: WebUri.uri(
-                                        Uri.parse(
+                                        uri_parser.tryParseUrl(
                                           urlTextController.text,
-                                        ),
+                                          eagerParsing: true,
+                                        )!,
                                       ),
                                     ),
                                   );
@@ -140,12 +142,9 @@ class WebPageDialog extends HookConsumerWidget {
                           : null,
                     ),
                     validator: (value) {
-                      if (value != null) {
-                        if (Uri.tryParse(value) case final Uri url) {
-                          if (url.hasScheme && url.hasAuthority) {
-                            return null;
-                          }
-                        }
+                      if (uri_parser.tryParseUrl(value, eagerParsing: true) !=
+                          null) {
+                        return null;
                       }
 
                       return 'Invalid URL';

app/lib/utils/uri_parser.dart

@@ -1,12 +1,22 @@
-Uri? tryParseUrl(String? input) {
+Uri? tryParseUrl(String? input, {bool eagerParsing = false}) {
   if (input != null) {
-    final uri = Uri.tryParse(input);
-    if (uri != null &&
-        uri.hasAuthority &&
-        (uri.isScheme('http') || uri.isScheme('https') || !uri.hasScheme)) {
-      return uri;
+    var uri = Uri.tryParse(input);
+    if (uri != null) {
+      if (uri.authority.isEmpty && eagerParsing) {
+        //When there is no scheme, there will be no authority/host and all becomes a path
+        //so we make sure there are at least 2 segments where the first one looks like a domain
+        if (uri.pathSegments.length > 1 &&
+            RegExp(r'.[a-z]{2,}$').hasMatch(uri.pathSegments.first)) {
+          uri = Uri.tryParse('https://$input');
+        }
+      }
+
+      if (uri != null &&
+          uri.authority.isNotEmpty &&
+          (uri.isScheme('http') || uri.isScheme('https') || !uri.hasScheme)) {
+        return uri;
+      }
     }
   }
-
   return null;
 }