implement base provider

metagpt/provider/bedrock/base_provider.py

@@ -1,3 +1,27 @@
-from abc import ABC
-class BaseBedrockProvider(ABC):
-    pass
+
+import json
+
+class BaseBedrockProvider(object):
+    # to handle different generation kwargs
+    max_length = "max_tokens"
+    temperature = "temperature"
+    top_p = "top-p"
+    top_k = "top-k"
+
+    def get_request_body(self, prompt, generate_kwargs: dict):
+        return {"prompt": prompt} | generate_kwargs
+
+    def get_choice_text(self, response) -> str:
+        response_body = json.loads(response["body"].read())
+        completions = response_body["content"]["outputs"][0]['text']
+        return completions
+
+    def messages_to_prompt(self, messages: list[dict]):
+        """[{"role": "user", "content": msg}] to user: <msg> etc."""
+        return "\n".join([f"{i['role']}: {i['content']}" for i in messages])
+
+    def format_prompt(self, prompt: str) -> str:
+        return prompt
+
+    def format_messages(self, messages: list[dict]) -> list[dict]:
+        return messages