feat(providers): implement custom classes

src/lib/models/providers/openai/index.ts

@@ -0,0 +1,212 @@
+import { BaseChatModel } from '@langchain/core/language_models/chat_models';
+import { Embeddings } from '@langchain/core/embeddings';
+import { UIConfigField } from '@/lib/config/types';
+import { getConfiguredModelProviderById } from '@/lib/config/serverRegistry';
+import { Model, ModelList, ProviderMetadata } from '../../types';
+import OpenAIEmbedding from './openaiEmbedding';
+import BaseEmbedding from '../../base/embedding';
+import BaseModelProvider from '../../base/provider';
+import BaseLLM from '../../base/llm';
+import OpenAILLM from './openaiLLM';
+
+interface OpenAIConfig {
+  apiKey: string;
+  baseURL: string;
+}
+
+const defaultChatModels: Model[] = [
+  {
+    name: 'GPT-3.5 Turbo',
+    key: 'gpt-3.5-turbo',
+  },
+  {
+    name: 'GPT-4',
+    key: 'gpt-4',
+  },
+  {
+    name: 'GPT-4 turbo',
+    key: 'gpt-4-turbo',
+  },
+  {
+    name: 'GPT-4 omni',
+    key: 'gpt-4o',
+  },
+  {
+    name: 'GPT-4o (2024-05-13)',
+    key: 'gpt-4o-2024-05-13',
+  },
+  {
+    name: 'GPT-4 omni mini',
+    key: 'gpt-4o-mini',
+  },
+  {
+    name: 'GPT 4.1 nano',
+    key: 'gpt-4.1-nano',
+  },
+  {
+    name: 'GPT 4.1 mini',
+    key: 'gpt-4.1-mini',
+  },
+  {
+    name: 'GPT 4.1',
+    key: 'gpt-4.1',
+  },
+  {
+    name: 'GPT 5 nano',
+    key: 'gpt-5-nano',
+  },
+  {
+    name: 'GPT 5',
+    key: 'gpt-5',
+  },
+  {
+    name: 'GPT 5 Mini',
+    key: 'gpt-5-mini',
+  },
+  {
+    name: 'o1',
+    key: 'o1',
+  },
+  {
+    name: 'o3',
+    key: 'o3',
+  },
+  {
+    name: 'o3 Mini',
+    key: 'o3-mini',
+  },
+  {
+    name: 'o4 Mini',
+    key: 'o4-mini',
+  },
+];
+
+const defaultEmbeddingModels: Model[] = [
+  {
+    name: 'Text Embedding 3 Small',
+    key: 'text-embedding-3-small',
+  },
+  {
+    name: 'Text Embedding 3 Large',
+    key: 'text-embedding-3-large',
+  },
+];
+
+const providerConfigFields: UIConfigField[] = [
+  {
+    type: 'password',
+    name: 'API Key',
+    key: 'apiKey',
+    description: 'Your OpenAI API key',
+    required: true,
+    placeholder: 'OpenAI API Key',
+    env: 'OPENAI_API_KEY',
+    scope: 'server',
+  },
+  {
+    type: 'string',
+    name: 'Base URL',
+    key: 'baseURL',
+    description: 'The base URL for the OpenAI API',
+    required: true,
+    placeholder: 'OpenAI Base URL',
+    default: 'https://api.openai.com/v1',
+    env: 'OPENAI_BASE_URL',
+    scope: 'server',
+  },
+];
+
+class OpenAIProvider extends BaseModelProvider<OpenAIConfig> {
+  constructor(id: string, name: string, config: OpenAIConfig) {
+    super(id, name, config);
+  }
+
+  async getDefaultModels(): Promise<ModelList> {
+    if (this.config.baseURL === 'https://api.openai.com/v1') {
+      return {
+        embedding: defaultEmbeddingModels,
+        chat: defaultChatModels,
+      };
+    }
+
+    return {
+      embedding: [],
+      chat: [],
+    };
+  }
+
+  async getModelList(): Promise<ModelList> {
+    const defaultModels = await this.getDefaultModels();
+    const configProvider = getConfiguredModelProviderById(this.id)!;
+
+    return {
+      embedding: [
+        ...defaultModels.embedding,
+        ...configProvider.embeddingModels,
+      ],
+      chat: [...defaultModels.chat, ...configProvider.chatModels],
+    };
+  }
+
+  async loadChatModel(key: string): Promise<BaseLLM<any>> {
+    const modelList = await this.getModelList();
+
+    const exists = modelList.chat.find((m) => m.key === key);
+
+    if (!exists) {
+      throw new Error(
+        'Error Loading OpenAI Chat Model. Invalid Model Selected',
+      );
+    }
+
+    return new OpenAILLM({
+      apiKey: this.config.apiKey,
+      model: key,
+      baseURL: this.config.baseURL,
+    });
+  }
+
+  async loadEmbeddingModel(key: string): Promise<BaseEmbedding<any>> {
+    const modelList = await this.getModelList();
+    const exists = modelList.embedding.find((m) => m.key === key);
+
+    if (!exists) {
+      throw new Error(
+        'Error Loading OpenAI Embedding Model. Invalid Model Selected.',
+      );
+    }
+
+    return new OpenAIEmbedding({
+      apiKey: this.config.apiKey,
+      model: key,
+      baseURL: this.config.baseURL,
+    });
+  }
+
+  static parseAndValidate(raw: any): OpenAIConfig {
+    if (!raw || typeof raw !== 'object')
+      throw new Error('Invalid config provided. Expected object');
+    if (!raw.apiKey || !raw.baseURL)
+      throw new Error(
+        'Invalid config provided. API key and base URL must be provided',
+      );
+
+    return {
+      apiKey: String(raw.apiKey),
+      baseURL: String(raw.baseURL),
+    };
+  }
+
+  static getProviderConfigFields(): UIConfigField[] {
+    return providerConfigFields;
+  }
+
+  static getProviderMetadata(): ProviderMetadata {
+    return {
+      key: 'openai',
+      name: 'OpenAI',
+    };
+  }
+}
+
+export default OpenAIProvider;