Update notification service

AppImage/scripts/ai_providers/openai_provider.py

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+"""OpenAI provider implementation.
+
+OpenAI is the industry standard for AI APIs. gpt-4o-mini provides
+excellent quality at a reasonable price point.
+"""
+from typing import Optional
+from .base import AIProvider, AIProviderError
+
+
+class OpenAIProvider(AIProvider):
+    """OpenAI provider using their Chat Completions API."""
+    
+    NAME = "openai"
+    DEFAULT_MODEL = "gpt-4o-mini"
+    REQUIRES_API_KEY = True
+    API_URL = "https://api.openai.com/v1/chat/completions"
+    
+    def generate(self, system_prompt: str, user_message: str,
+                 max_tokens: int = 200) -> Optional[str]:
+        """Generate a response using OpenAI's API.
+        
+        Args:
+            system_prompt: System instructions
+            user_message: User message to process
+            max_tokens: Maximum response length
+            
+        Returns:
+            Generated text or None if failed
+            
+        Raises:
+            AIProviderError: If API key is missing or request fails
+        """
+        if not self.api_key:
+            raise AIProviderError("API key required for OpenAI")
+        
+        payload = {
+            'model': self.model,
+            'messages': [
+                {'role': 'system', 'content': system_prompt},
+                {'role': 'user', 'content': user_message},
+            ],
+            'max_tokens': max_tokens,
+            'temperature': 0.3,
+        }
+        
+        headers = {
+            'Content-Type': 'application/json',
+            'Authorization': f'Bearer {self.api_key}',
+        }
+        
+        result = self._make_request(self.API_URL, payload, headers)
+        
+        try:
+            return result['choices'][0]['message']['content'].strip()
+        except (KeyError, IndexError) as e:
+            raise AIProviderError(f"Unexpected response format: {e}")