fix: correct link validation & some points on dash

fe-app-podkop/src/validators/validateTrojanUrl.ts

@@ -1,6 +1,5 @@
 import { ValidationResult } from './types';
 
-// TODO refactor current validation and add tests
 export function validateTrojanUrl(url: string): ValidationResult {
   try {
     if (!url.startsWith('trojan://')) {
@@ -17,17 +16,42 @@ export function validateTrojanUrl(url: string): ValidationResult {
       };
     }
 
-    const refinedURL = url.replace('trojan://', 'https://');
-    const parsedUrl = new URL(refinedURL);
+    const body = url.slice('trojan://'.length);
+    const [mainPart] = body.split('#');
+    const [userHostPort] = mainPart.split('?');
 
-    if (!parsedUrl.username || !parsedUrl.hostname || !parsedUrl.port) {
+    const [userPart, hostPortPart] = userHostPort.split('@');
+
+    if (!userHostPort)
       return {
         valid: false,
-        message: _(
-          'Invalid Trojan URL: must contain username, hostname and port',
-        ),
+        message: 'Invalid Trojan URL: missing credentials and host',
+      };
+
+    if (!userPart)
+      return { valid: false, message: 'Invalid Trojan URL: missing password' };
+
+    if (!hostPortPart)
+      return {
+        valid: false,
+        message: 'Invalid Trojan URL: missing hostname and port',
+      };
+
+    const [host, port] = hostPortPart.split(':');
+
+    if (!host)
+      return { valid: false, message: 'Invalid Trojan URL: missing hostname' };
+
+    if (!port)
+      return { valid: false, message: 'Invalid Trojan URL: missing port' };
+
+    const portNum = Number(port);
+
+    if (!Number.isInteger(portNum) || portNum < 1 || portNum > 65535)
+      return {
+        valid: false,
+        message: 'Invalid Trojan URL: invalid port number',
       };
-    }
   } catch (_e) {
     return { valid: false, message: _('Invalid Trojan URL: parsing failed') };
   }