refactor: encapsulate model info functionality into ModelInfoManager class

aider/models.py

@@ -632,78 +632,72 @@ MODEL_SETTINGS = [
 ]
 
 
-model_info_url = (
-    "https://raw.githubusercontent.com/BerriAI/litellm/main/model_prices_and_context_window.json"
-)
+class ModelInfoManager:
+    MODEL_INFO_URL = "https://raw.githubusercontent.com/BerriAI/litellm/main/model_prices_and_context_window.json"
+    CACHE_TTL = 60 * 60 * 24  # 24 hours
 
-#ai refactor get_model_flexible & get_model_info into a class!
-# the class should load the cache_file once, on __init__
-def get_model_flexible(model, content):
-    info = content.get(model, dict())
-    if info:
-        return info
+    def __init__(self):
+        self.cache_dir = Path.home() / ".aider" / "caches"
+        self.cache_file = self.cache_dir / "model_prices_and_context_window.json"
+        self.content = None
+        self._load_cache()
 
-    pieces = model.split("/")
-    if len(pieces) == 2:
-        info = content.get(pieces[1])
-        if info and info.get("litellm_provider") == pieces[0]:
+    def _load_cache(self):
+        try:
+            self.cache_dir.mkdir(parents=True, exist_ok=True)
+            if self.cache_file.exists():
+                cache_age = time.time() - self.cache_file.stat().st_mtime
+                if cache_age < self.CACHE_TTL:
+                    self.content = json.loads(self.cache_file.read_text())
+        except OSError:
+            pass
+
+    def _update_cache(self):
+        if not litellm._lazy_module:
+            try:
+                import requests
+                response = requests.get(self.MODEL_INFO_URL, timeout=5)
+                if response.status_code == 200:
+                    self.content = response.json()
+                    try:
+                        self.cache_file.write_text(json.dumps(self.content, indent=4))
+                    except OSError:
+                        pass
+            except Exception as ex:
+                print(str(ex))
+
+    def get_model_flexible(self, model):
+        if not self.content:
+            self._update_cache()
+        
+        if not self.content:
+            return dict()
+
+        info = self.content.get(model, dict())
+        if info:
             return info
 
-    return dict()
+        pieces = model.split("/")
+        if len(pieces) == 2:
+            info = self.content.get(pieces[1])
+            if info and info.get("litellm_provider") == pieces[0]:
+                return info
 
-
-def get_model_info(model):
-    if not litellm._lazy_module:
-        cache_dir = Path.home() / ".aider" / "caches"
-        cache_file = cache_dir / "model_prices_and_context_window.json"
-
-        try:
-            cache_dir.mkdir(parents=True, exist_ok=True)
-            use_cache = True
-        except OSError:
-            # If we can't create the cache directory, we'll skip using the cache
-            use_cache = False
-
-        if use_cache:
-            current_time = time.time()
-            cache_age = (
-                current_time - cache_file.stat().st_mtime if cache_file.exists() else float("inf")
-            )
-
-            if cache_age < 60 * 60 * 24:
-                try:
-                    content = json.loads(cache_file.read_text())
-                    res = get_model_flexible(model, content)
-                    if res:
-                        return res
-                except Exception as ex:
-                    print(str(ex))
-
-        import requests
-
-        try:
-            response = requests.get(model_info_url, timeout=5)
-            if response.status_code == 200:
-                content = response.json()
-                if use_cache:
-                    try:
-                        cache_file.write_text(json.dumps(content, indent=4))
-                    except OSError:
-                        # If we can't write to the cache file, we'll just skip caching
-                        pass
-                res = get_model_flexible(model, content)
-                if res:
-                    return res
-        except Exception as ex:
-            print(str(ex))
-
-    # If all else fails, do it the slow way...
-    try:
-        info = litellm.get_model_info(model)
-        return info
-    except Exception:
         return dict()
 
+    def get_model_info(self, model):
+        info = self.get_model_flexible(model)
+        if info:
+            return info
+
+        # If all else fails, do it the slow way...
+        try:
+            return litellm.get_model_info(model)
+        except Exception:
+            return dict()
+
+model_info_manager = ModelInfoManager()
+
 
 class Model(ModelSettings):
     def __init__(self, model, weak_model=None, editor_model=None, editor_edit_format=None):
@@ -737,7 +731,7 @@ class Model(ModelSettings):
             self.get_editor_model(editor_model, editor_edit_format)
 
     def get_model_info(self, model):
-        return get_model_info(model)
+        return model_info_manager.get_model_info(model)
 
     def configure_model_settings(self, model):
         for ms in MODEL_SETTINGS: