REFACTOR: Improved Package Structure

packages/genai/lib/llm_provider.dart

@@ -0,0 +1,73 @@
+import 'providers/providers.dart';
+import '../llm_manager.dart';
+import 'llm_model.dart';
+
+enum LLMProvider {
+  gemini('Gemini'),
+  openai('OpenAI'),
+  anthropic('Anthropic'),
+  ollama('Ollama'),
+  azureopenai('Azure OpenAI');
+
+  const LLMProvider(this.displayName);
+
+  final String displayName;
+
+  List<LLMModel> get models {
+    final avl = LLMManager.models[this.name.toLowerCase()];
+    if (avl == null) return [];
+    List<LLMModel> models = [];
+    for (final x in avl) {
+      models.add(LLMModel(x[0], x[1], this));
+    }
+    return models;
+  }
+
+  ModelController get modelController {
+    switch (this) {
+      case LLMProvider.ollama:
+        return OllamaModelController.instance;
+      case LLMProvider.gemini:
+        return GeminiModelController.instance;
+      case LLMProvider.azureopenai:
+        return AzureOpenAIModelController.instance;
+      case LLMProvider.openai:
+        return OpenAIModelController.instance;
+      case LLMProvider.anthropic:
+        return AnthropicModelController.instance;
+    }
+  }
+
+  static LLMProvider fromJSON(Map json) {
+    return LLMProvider.fromName(json['llm_provider']);
+  }
+
+  static Map toJSON(LLMProvider p) {
+    return {'llm_provider': p.name};
+  }
+
+  static LLMProvider? fromJSONNullable(Map? json) {
+    if (json == null) return null;
+    return LLMProvider.fromName(json['llm_provider']);
+  }
+
+  static Map? toJSONNullable(LLMProvider? p) {
+    if (p == null) return null;
+    return {'llm_provider': p.name};
+  }
+
+  LLMModel getLLMByIdentifier(String identifier) {
+    final m = this.models.where((e) => e.identifier == identifier).firstOrNull;
+    if (m == null) {
+      throw Exception('MODEL DOES NOT EXIST $identifier');
+    }
+    return m;
+  }
+
+  static LLMProvider fromName(String name) {
+    return LLMProvider.values.firstWhere(
+      (model) => model.name == name,
+      orElse: () => throw ArgumentError('INVALID LLM PROVIDER: $name'),
+    );
+  }
+}