initial functions support and added weather func

bot/functions.py

@@ -0,0 +1,23 @@
+import json
+
+from plugins.weather import weather_function_spec, get_current_weather
+
+
+def get_functions_specs():
+    """
+    Return the list of function specs that can be called by the model
+    """
+    return [
+        weather_function_spec(),
+    ]
+
+
+async def call_function(function_name, arguments):
+    """
+    Call a function based on the name and parameters provided
+    """
+    if function_name == "get_current_weather":
+        arguments = json.loads(arguments)
+        return await get_current_weather(arguments["location"], arguments["unit"])
+
+    raise Exception(f"Function {function_name} not found")