added deepl plugin

bot/plugins/deepl.py

@@ -0,0 +1,40 @@
+import os
+from typing import Dict
+
+import deepl
+
+from .plugin import Plugin
+
+
+class DeeplTranslatePlugin(Plugin):
+    """
+    A plugin to translate a given text from a language to another, using DeepL
+    """
+
+    def __init__(self):
+            deepl_api_key = os.getenv('DEEPL_API_KEY')
+            if not deepl_api_key:
+                raise ValueError('DEEPL_API_KEY environment variable must be set to use DeeplPlugin')
+            self.api_key = deepl_api_key
+
+    def get_source_name(self) -> str:
+        return "DeepL Translate"
+
+    def get_spec(self) -> [Dict]:
+        return [{
+            "name": "translate",
+            "description": "Translate a given text from a language to another",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "text": {"type": "string", "description": "The text to translate"},
+                    "to_language": {"type": "string", "description": "The language to translate to (e.g. 'it')"}
+                },
+                "required": ["text", "to_language"],
+            },
+        }]
+
+    async def execute(self, function_name, **kwargs) -> Dict:
+        translator = deepl.Translator(self.api_key)
+        answer = translator.translate_text(kwargs['text'], target_lang=kwargs['to_language'])
+        return answer.text