fix: prevent duplicated tags in sing-box

app/subscription/singbox.py

@@ -14,6 +14,7 @@
 class SingBoxConfiguration(str):
 
     def __init__(self):
+        self.proxy_remarks = []
         template = render_template(SINGBOX_SUBSCRIPTION_TEMPLATE)
         self.config = json.loads(template)
         self.mux_template = render_template(MUX_TEMPLATE)
@@ -33,6 +34,16 @@ def __init__(self):
         else:
             self.grpc_user_agent_data = []
 
+    def _remark_validation(self, remark):
+        if not remark in self.proxy_remarks:
+            return remark
+        c = 2
+        while True:
+            new = f'{remark} ({c})'
+            if not new in self.proxy_remarks:
+                return new
+            c += 1
+
     def add_outbound(self, outbound_data):
         self.config["outbounds"].append(outbound_data)
 
@@ -250,6 +261,9 @@ def add(self, remark: str, address: str, inbound: dict, settings: dict):
 
         alpn = inbound.get('alpn', None)
 
+        remark = self._remark_validation(remark)
+        self.proxy_remarks.append(remark)
+
         outbound = self.make_outbound(
             remark=remark,
             type=inbound['protocol'],