enh: filter function priority valve support

backend/main.py

@@ -389,6 +389,14 @@ class ChatCompletionMiddleware(BaseHTTPMiddleware):
                 )
             model = app.state.MODELS[model_id]
 
+            def get_priority(function_id):
+                function = Functions.get_function_by_id(function_id)
+                if function is not None and hasattr(function, "valves"):
+                    return (function.valves if function.valves else {}).get(
+                        "priority", 0
+                    )
+                return 0
+
             filter_ids = [
                 function.id
                 for function in Functions.get_functions_by_type(
@@ -400,6 +408,7 @@ class ChatCompletionMiddleware(BaseHTTPMiddleware):
                 filter_ids.extend(model["info"]["meta"].get("filterIds", []))
                 filter_ids = list(set(filter_ids))
 
+            filter_ids.sort(key=get_priority)
             for filter_id in filter_ids:
                 filter = Functions.get_function_by_id(filter_id)
                 if filter:
@@ -1122,17 +1131,31 @@ async def chat_completed(form_data: dict, user=Depends(get_verified_user)):
             else:
                 pass
 
+    def get_priority(function_id):
+        function = Functions.get_function_by_id(function_id)
+        if function is not None and hasattr(function, "valves"):
+            return (function.valves if function.valves else {}).get("priority", 0)
+        return 0
+
+    filter_ids = [
+        function.id
+        for function in Functions.get_functions_by_type("filter", active_only=True)
+    ]
     # Check if the model has any filters
     if "info" in model and "meta" in model["info"]:
-        for filter_id in model["info"]["meta"].get("filterIds", []):
+        filter_ids.extend(model["info"]["meta"].get("filterIds", []))
+        filter_ids = list(set(filter_ids))
+
+    # Sort filter_ids by priority, using the get_priority function
+    filter_ids.sort(key=get_priority)
+
+    for filter_id in filter_ids:
         filter = Functions.get_function_by_id(filter_id)
         if filter:
             if filter_id in webui_app.state.FUNCTIONS:
                 function_module = webui_app.state.FUNCTIONS[filter_id]
             else:
-                    function_module, function_type = load_function_module_by_id(
-                        filter_id
-                    )
+                function_module, function_type = load_function_module_by_id(filter_id)
                 webui_app.state.FUNCTIONS[filter_id] = function_module
 
             if hasattr(function_module, "valves") and hasattr(