Provider: add deepseek support

src/globals.ts

@@ -51,6 +51,7 @@ export const LINGYI: string = 'lingyi';
 export const ZHIPU: string = 'zhipu';
 export const NOVITA_AI: string = 'novita-ai';
 export const MONSTERAPI: string = 'monsterapi';
+export const DEEPSEEK: string = 'deepseek';
 
 export const VALID_PROVIDERS = [
   ANTHROPIC,
@@ -82,6 +83,7 @@ export const VALID_PROVIDERS = [
   ZHIPU,
   NOVITA_AI,
   MONSTERAPI,
+  DEEPSEEK,
 ];
 
 export const CONTENT_TYPES = {

src/providers/deepseek/api.ts

@@ -0,0 +1,18 @@
+import { ProviderAPIConfig } from '../types';
+
+const DeepSeekAPIConfig: ProviderAPIConfig = {
+  getBaseURL: () => 'https://api.deepseek.com',
+  headers: ({ providerOptions }) => {
+    return { Authorization: `Bearer ${providerOptions.apiKey}` }; // https://platform.deepseek.com/api_keys
+  },
+  getEndpoint: ({ fn }) => {
+    switch (fn) {
+      case 'chatComplete':
+        return '/v1/chat/completions';
+      default:
+        return '';
+    }
+  },
+};
+
+export default DeepSeekAPIConfig;

src/providers/deepseek/chatComplete.ts

@@ -0,0 +1,175 @@
+import { DEEPSEEK } from '../../globals';
+
+import {
+  ChatCompletionResponse,
+  ErrorResponse,
+  ProviderConfig,
+} from '../types';
+import {
+  generateErrorResponse,
+  generateInvalidProviderResponseError,
+} from '../utils';
+
+export const DeepSeekChatCompleteConfig: ProviderConfig = {
+  model: {
+    param: 'model',
+    required: true,
+    default: 'deepseek-chat',
+  },
+  messages: {
+    param: 'messages',
+    default: '',
+  },
+  max_tokens: {
+    param: 'max_tokens',
+    default: 100,
+    min: 0,
+  },
+  temperature: {
+    param: 'temperature',
+    default: 1,
+    min: 0,
+    max: 2,
+  },
+  top_p: {
+    param: 'top_p',
+    default: 1,
+    min: 0,
+    max: 1,
+  },
+  stream: {
+    param: 'stream',
+    default: false,
+  },
+  frequency_penalty: {
+    param: 'frequency_penalty',
+    default: 0,
+    min: -2,
+    max: 2,
+  },
+  presence_penalty: {
+    param: 'presence_penalty',
+    default: 0,
+    min: -2,
+    max: 2,
+  },
+  stop: {
+    param: 'stop',
+    default: null,
+  },
+  logprobs: {
+    param: 'logprobs',
+    default: false,
+  },
+  top_logprobs: {
+    param: 'top_logprobs',
+    default: 0,
+    min: 0,
+    max: 20,
+  },
+};
+
+interface DeepSeekChatCompleteResponse extends ChatCompletionResponse {
+  id: string;
+  object: string;
+  created: number;
+  model: 'deepseek-chat' | 'deepseek-coder';
+  usage: {
+    prompt_tokens: number;
+    completion_tokens: number;
+    total_tokens: number;
+  };
+}
+
+export interface DeepSeekErrorResponse {
+  object: string;
+  message: string;
+  type: string;
+  param: string | null;
+  code: string;
+}
+
+interface DeepSeekStreamChunk {
+  id: string;
+  object: string;
+  created: number;
+  model: string;
+  choices: {
+    delta: {
+      role?: string | null;
+      content?: string;
+    };
+    index: number;
+    finish_reason: string | null;
+  }[];
+}
+
+export const DeepSeekChatCompleteResponseTransform: (
+  response: DeepSeekChatCompleteResponse | DeepSeekErrorResponse,
+  responseStatus: number
+) => ChatCompletionResponse | ErrorResponse = (response, responseStatus) => {
+  if ('message' in response && responseStatus !== 200) {
+    return generateErrorResponse(
+      {
+        message: response.message,
+        type: response.type,
+        param: response.param,
+        code: response.code,
+      },
+      DEEPSEEK
+    );
+  }
+
+  if ('choices' in response) {
+    return {
+      id: response.id,
+      object: response.object,
+      created: response.created,
+      model: response.model,
+      provider: DEEPSEEK,
+      choices: response.choices.map((c) => ({
+        index: c.index,
+        message: {
+          role: c.message.role,
+          content: c.message.content,
+        },
+        finish_reason: c.finish_reason,
+      })),
+      usage: {
+        prompt_tokens: response.usage?.prompt_tokens,
+        completion_tokens: response.usage?.completion_tokens,
+        total_tokens: response.usage?.total_tokens,
+      },
+    };
+  }
+
+  return generateInvalidProviderResponseError(response, DEEPSEEK);
+};
+
+export const DeepSeekChatCompleteStreamChunkTransform: (
+  response: string
+) => string = (responseChunk) => {
+  let chunk = responseChunk.trim();
+  chunk = chunk.replace(/^data: /, '');
+  chunk = chunk.trim();
+  if (chunk === '[DONE]') {
+    return `data: ${chunk}\n\n`;
+  }
+  const parsedChunk: DeepSeekStreamChunk = JSON.parse(chunk);
+  return (
+    `data: ${JSON.stringify({
+      id: parsedChunk.id,
+      object: parsedChunk.object,
+      created: parsedChunk.created,
+      model: parsedChunk.model,
+      provider: DEEPSEEK,
+      choices: [
+        {
+          index: parsedChunk.choices[0].index,
+          delta: parsedChunk.choices[0].delta,
+          finish_reason: parsedChunk.choices[0].finish_reason,
+        },
+      ],
+    })}` + '\n\n'
+  );
+};

src/providers/deepseek/index.ts

@@ -0,0 +1,18 @@
+import { ProviderConfigs } from '../types';
+import DeepSeekAPIConfig from './api';
+import {
+  DeepSeekChatCompleteConfig,
+  DeepSeekChatCompleteResponseTransform,
+  DeepSeekChatCompleteStreamChunkTransform,
+} from './chatComplete';
+
+const DeepSeekConfig: ProviderConfigs = {
+  chatComplete: DeepSeekChatCompleteConfig,
+  api: DeepSeekAPIConfig,
+  responseTransforms: {
+    chatComplete: DeepSeekChatCompleteResponseTransform,
+    'stream-chatComplete': DeepSeekChatCompleteStreamChunkTransform,
+  },
+};
+
+export default DeepSeekConfig;

src/providers/index.ts

@@ -28,6 +28,7 @@ import LingYiConfig from './lingyi';
 import ZhipuConfig from './zhipu';
 import NovitaAIConfig from './novita-ai';
 import MonsterAPIConfig from './monsterapi';
+import DeepSeekAPIConfig from './deepseek';
 
 const Providers: { [key: string]: ProviderConfigs } = {
   openai: OpenAIConfig,
@@ -59,6 +60,7 @@ const Providers: { [key: string]: ProviderConfigs } = {
   zhipu: ZhipuConfig,
   'novita-ai': NovitaAIConfig,
   monsterapi: MonsterAPIConfig,
+  deepseek: DeepSeekAPIConfig,
 };
 
 export default Providers;