ALwrity Version 0.5.0 (Fastapi + React )

backend/llm_providers/anthropic_provider.py

@@ -0,0 +1,109 @@
+"""Anthropic Provider Service for ALwrity Backend.
+
+This service handles Anthropic Claude API integrations,
+migrated from the legacy lib/gpt_providers/text_generation/anthropic_text_gen.py
+"""
+
+import os
+import time
+import anthropic
+from typing import Tuple
+from loguru import logger
+from tenacity import (
+    retry,
+    stop_after_attempt,
+    wait_random_exponential,
+)
+
+@retry(wait=wait_random_exponential(min=1, max=60), stop=stop_after_attempt(6))
+def anthropic_text_response(prompt: str, model: str = "claude-3-5-sonnet-20241022", 
+                           temperature: float = 0.7, max_tokens: int = 4000, 
+                           system_prompt: str = None) -> str:
+    """
+    Generate text using Anthropic's Claude model.
+
+    Args:
+        prompt (str): The input text to generate completion for.
+        model (str, optional): Model to be used for the completion. Defaults to "claude-3-5-sonnet-20241022".
+        temperature (float, optional): Controls randomness. Lower values make responses more deterministic. Defaults to 0.7.
+        max_tokens (int, optional): Maximum number of tokens to generate. Defaults to 4000.
+        system_prompt (str, optional): System prompt for the conversation. Defaults to None.
+
+    Returns:
+        str: The generated text completion.
+
+    Raises:
+        SystemExit: If an API error, connection error, or rate limit error occurs.
+    """
+    # Wait for 5 seconds to comply with rate limits
+    for _ in range(5):
+        time.sleep(1)
+
+    try:
+        # Get API key from environment
+        api_key = os.getenv('ANTHROPIC_API_KEY')
+        if not api_key:
+            raise ValueError("Anthropic API key not found in environment variables")
+        
+        client = anthropic.Anthropic(api_key=api_key)
+        
+        # Prepare messages
+        messages = []
+        if system_prompt:
+            messages.append({"role": "system", "content": system_prompt})
+        messages.append({"role": "user", "content": prompt})
+        
+        response = client.messages.create(
+            model=model,
+            messages=messages,
+            max_tokens=max_tokens,
+            temperature=temperature
+        )
+        
+        logger.info(f"[anthropic_text_response] Generated response with {len(response.content[0].text)} characters")
+        return response.content[0].text
+
+    except anthropic.AuthenticationError as e:
+        logger.error(f"Anthropic Authentication Error: {e}")
+        raise SystemExit from e
+    except anthropic.RateLimitError as e:
+        logger.error(f"Anthropic Rate Limit Error: {e}")
+        raise SystemExit from e
+    except anthropic.APIConnectionError as e:
+        logger.error(f"Anthropic API Connection Error: {e}")
+        raise SystemExit from e
+    except Exception as e:
+        logger.error(f"Unexpected error in Anthropic API call: {e}")
+        raise SystemExit from e
+
+async def test_anthropic_api_key(api_key: str) -> Tuple[bool, str]:
+    """
+    Test if the provided Anthropic API key is valid.
+    
+    Args:
+        api_key (str): The Anthropic API key to test
+        
+    Returns:
+        tuple[bool, str]: A tuple containing (is_valid, message)
+    """
+    try:
+        # Create Anthropic client with the provided key
+        client = anthropic.Anthropic(api_key=api_key)
+        
+        # Try to generate a simple response as a test
+        response = client.messages.create(
+            model="claude-3-5-sonnet-20241022",
+            messages=[{"role": "user", "content": "Hello"}],
+            max_tokens=10,
+            temperature=0.1
+        )
+        
+        # If we get here, the key is valid
+        return True, "Anthropic API key is valid"
+        
+    except anthropic.AuthenticationError:
+        return False, "Invalid Anthropic API key"
+    except anthropic.RateLimitError:
+        return False, "Rate limit exceeded. Please try again later."
+    except Exception as e:
+        return False, f"Error testing Anthropic API key: {str(e)}"