Add local profile

lib/utils/link_parsers.dart

@@ -1,10 +1,15 @@
+import 'dart:convert';
+
+import 'package:hiddify/domain/clash/clash.dart';
 import 'package:hiddify/utils/validators.dart';
 
 typedef ProfileLink = ({String url, String name});
 
 // TODO: test and improve
 abstract class LinkParser {
-  static const protocols = ['clash', 'clashmeta', 'sing-box', 'hiddify'];
+  // protocols schemas
+  static const protocols = {'clash', 'clashmeta', 'sing-box', 'hiddify'};
+  static const rawProtocols = {'vmess', 'vless', 'trojan', 'ss', 'tuic'};
 
   static ProfileLink? parse(String link) {
     return simple(link) ?? deep(link);
@@ -13,24 +18,39 @@ abstract class LinkParser {
   static ProfileLink? simple(String link) {
     if (!isUrl(link)) return null;
     final uri = Uri.parse(link.trim());
-    final params = uri.queryParameters;
     return (
       url: uri.toString(),
-      // .replace(queryParameters: {})
-      // .toString()
-      // .removeSuffix('?')
-      // .split('&')
-      // .first,
-      name: params['name'] ?? '',
+      name: uri.queryParameters['name'] ?? '',
     );
   }
 
+  static ({String content, String name})? protocol(String content) {
+    final lines = safeDecodeBase64(content).split('\n');
+    for (final line in lines) {
+      final uri = Uri.tryParse(line);
+      if (uri == null) continue;
+      final fragment =
+          uri.hasFragment ? Uri.decodeComponent(uri.fragment) : null;
+      final name = switch (uri.scheme) {
+        'ss' => fragment ?? ProxyType.shadowSocks.label,
+        'vless' => fragment ?? ProxyType.vless.label,
+        'tuic' => fragment ?? ProxyType.tuic.label,
+        'vmess' => ProxyType.vmess.label,
+        _ => null,
+      };
+      if (name != null) {
+        return (content: content, name: name);
+      }
+    }
+    return null;
+  }
+
   static ProfileLink? deep(String link) {
     final uri = Uri.tryParse(link.trim());
     if (uri == null || !uri.hasScheme || !uri.hasAuthority) return null;
     final queryParams = uri.queryParameters;
     switch (uri.scheme) {
-      case 'clash' || 'clashmeta':
+      case 'clash' || 'clashmeta' when uri.authority == 'install-config':
         if (uri.authority != 'install-config' ||
             !queryParams.containsKey('url')) return null;
         return (url: queryParams['url']!, name: queryParams['name'] ?? '');
@@ -48,3 +68,11 @@ abstract class LinkParser {
     }
   }
 }
+
+String safeDecodeBase64(String str) {
+  try {
+    return utf8.decode(base64Decode(str));
+  } catch (e) {
+    return str;
+  }
+}