ai/svelte/dist/index.mjs.map

Vercel AI SDK - The AI Toolkit for TypeScript and JavaScript

{"version":3,"sources":["../use-chat.ts","../../../../node_modules/.pnpm/swrev@4.0.0/node_modules/swrev/dist/swrev.mjs","../../../../node_modules/.pnpm/sswr@2.1.0_svelte@4.2.18/node_modules/sswr/dist/sswr.js","../use-completion.ts","../use-assistant.ts"],"sourcesContent":["import type {\n  ChatRequest,\n  ChatRequestOptions,\n  CreateMessage,\n  FetchFunction,\n  IdGenerator,\n  JSONValue,\n  Message,\n  UseChatOptions as SharedUseChatOptions,\n} from '@ai-sdk/ui-utils';\nimport {\n  callChatApi,\n  generateId as generateIdFunc,\n  processChatStream,\n} from '@ai-sdk/ui-utils';\nimport { useSWR } from 'sswr';\nimport { Readable, Writable, derived, get, writable } from 'svelte/store';\nexport type { CreateMessage, Message };\n\nexport type UseChatOptions = SharedUseChatOptions & {\n  /**\n  Maximal number of automatic roundtrips for tool calls.\n\n  An automatic tool call roundtrip is a call to the server with the\n  tool call results when all tool calls in the last assistant\n  message have results.\n\n  A maximum number is required to prevent infinite loops in the\n  case of misconfigured tools.\n\n  By default, it's set to 0, which will disable the feature.\n  */\n  maxToolRoundtrips?: number;\n};\n\nexport type UseChatHelpers = {\n  /** Current messages in the chat */\n  messages: Readable<Message[]>;\n  /** The error object of the API request */\n  error: Readable<undefined | Error>;\n  /**\n   * Append a user message to the chat list. This triggers the API call to fetch\n   * the assistant's response.\n   * @param message The message to append\n   * @param chatRequestOptions Additional options to pass to the API call\n   */\n  append: (\n    message: Message | CreateMessage,\n    chatRequestOptions?: ChatRequestOptions,\n  ) => Promise<string | null | undefined>;\n  /**\n   * Reload the last AI chat response for the given chat history. If the last\n   * message isn't from the assistant, it will request the API to generate a\n   * new response.\n   */\n  reload: (\n    chatRequestOptions?: ChatRequestOptions,\n  ) => Promise<string | null | undefined>;\n  /**\n   * Abort the current request immediately, keep the generated tokens if any.\n   */\n  stop: () => void;\n  /**\n   * Update the `messages` state locally. This is useful when you want to\n   * edit the messages on the client, and then trigger the `reload` method\n   * manually to regenerate the AI response.\n   */\n  setMessages: (\n    messages: Message[] | ((messages: Message[]) => Message[]),\n  ) => void;\n\n  /** The current value of the input */\n  input: Writable<string>;\n  /** Form submission handler to automatically reset input and append a user message  */\n  handleSubmit: (\n    event?: { preventDefault?: () => void },\n    chatRequestOptions?: ChatRequestOptions,\n  ) => void;\n  metadata?: Object;\n  /** Whether the API request is in progress */\n  isLoading: Readable<boolean | undefined>;\n\n  /** Additional data added on the server via StreamData */\n  data: Readable<JSONValue[] | undefined>;\n  /**\n  Maximal number of automatic roundtrips for tool calls.\n\n  An automatic tool call roundtrip is a call to the server with the\n  tool call results when all tool calls in the last assistant\n  message have results.\n\n  A maximum number is required to prevent infinite loops in the\n  case of misconfigured tools.\n\n  By default, it's set to 0, which will disable the feature.\n  */\n  maxToolRoundtrips?: number;\n};\n\nconst getStreamedResponse = async (\n  api: string,\n  chatRequest: ChatRequest,\n  mutate: (messages: Message[]) => void,\n  mutateStreamData: (data: JSONValue[] | undefined) => void,\n  existingData: JSONValue[] | undefined,\n  extraMetadata: {\n    credentials?: RequestCredentials;\n    headers?: Record<string, string> | Headers;\n    body?: any;\n  },\n  previousMessages: Message[],\n  abortControllerRef: AbortController | null,\n  generateId: IdGenerator,\n  streamProtocol: UseChatOptions['streamProtocol'],\n  onFinish: UseChatOptions['onFinish'],\n  onResponse: ((response: Response) => void | Promise<void>) | undefined,\n  onToolCall: UseChatOptions['onToolCall'] | undefined,\n  sendExtraMessageFields: boolean | undefined,\n  fetch: FetchFunction | undefined,\n  keepLastMessageOnError: boolean | undefined,\n) => {\n  // Do an optimistic update to the chat state to show the updated messages\n  // immediately.\n  mutate(chatRequest.messages);\n\n  const constructedMessagesPayload = sendExtraMessageFields\n    ? chatRequest.messages\n    : chatRequest.messages.map(\n        ({\n          role,\n          content,\n          name,\n          data,\n          annotations,\n          function_call,\n          tool_calls,\n          tool_call_id,\n          toolInvocations,\n        }) => ({\n          role,\n          content,\n          ...(name !== undefined && { name }),\n          ...(data !== undefined && { data }),\n          ...(annotations !== undefined && { annotations }),\n          ...(toolInvocations !== undefined && { toolInvocations }),\n          // outdated function/tool call handling (TODO deprecate):\n          tool_call_id,\n          ...(function_call !== undefined && { function_call }),\n          ...(tool_calls !== undefined && { tool_calls }),\n        }),\n      );\n\n  return await callChatApi({\n    api,\n    body: {\n      messages: constructedMessagesPayload,\n      data: chatRequest.data,\n      ...extraMetadata.body,\n      ...chatRequest.body,\n      ...(chatRequest.functions !== undefined && {\n        functions: chatRequest.functions,\n      }),\n      ...(chatRequest.function_call !== undefined && {\n        function_call: chatRequest.function_call,\n      }),\n      ...(chatRequest.tools !== undefined && {\n        tools: chatRequest.tools,\n      }),\n      ...(chatRequest.tool_choice !== undefined && {\n        tool_choice: chatRequest.tool_choice,\n      }),\n    },\n    streamProtocol,\n    credentials: extraMetadata.credentials,\n    headers: {\n      ...extraMetadata.headers,\n      ...chatRequest.headers,\n    },\n    abortController: () => abortControllerRef,\n    restoreMessagesOnFailure() {\n      if (!keepLastMessageOnError) {\n        mutate(previousMessages);\n      }\n    },\n    onResponse,\n    onUpdate(merged, data) {\n      mutate([...chatRequest.messages, ...merged]);\n      mutateStreamData([...(existingData || []), ...(data || [])]);\n    },\n    onFinish,\n    generateId,\n    onToolCall,\n    fetch,\n  });\n};\n\nlet uniqueId = 0;\n\nconst store: Record<string, Message[] | undefined> = {};\n\n/**\nCheck if the message is an assistant message with completed tool calls.\nThe message must have at least one tool invocation and all tool invocations\nmust have a result.\n */\nfunction isAssistantMessageWithCompletedToolCalls(message: Message) {\n  return (\n    message.role === 'assistant' &&\n    message.toolInvocations &&\n    message.toolInvocations.length > 0 &&\n    message.toolInvocations.every(toolInvocation => 'result' in toolInvocation)\n  );\n}\n\n/**\nReturns the number of trailing assistant messages in the array.\n */\nfunction countTrailingAssistantMessages(messages: Message[]) {\n  let count = 0;\n  for (let i = messages.length - 1; i >= 0; i--) {\n    if (messages[i].role === 'assistant') {\n      count++;\n    } else {\n      break;\n    }\n  }\n\n  return count;\n}\n\n/**\n * @deprecated Use `useChat` from `@ai-sdk/svelte` instead.\n */\nexport function useChat({\n  api = '/api/chat',\n  id,\n  initialMessages = [],\n  initialInput = '',\n  sendExtraMessageFields,\n  experimental_onFunctionCall,\n  experimental_onToolCall,\n  streamMode,\n  streamProtocol,\n  onResponse,\n  onFinish,\n  onError,\n  onToolCall,\n  credentials,\n  headers,\n  body,\n  generateId = generateIdFunc,\n  fetch,\n  keepLastMessageOnError = false,\n  maxToolRoundtrips = 0,\n}: UseChatOptions = {}): UseChatHelpers & {\n  addToolResult: ({\n    toolCallId,\n    result,\n  }: {\n    toolCallId: string;\n    result: any;\n  }) => void;\n} {\n  // streamMode is deprecated, use streamProtocol instead.\n  if (streamMode) {\n    streamProtocol ??= streamMode === 'text' ? 'text' : undefined;\n  }\n\n  // Generate a unique id for the chat if not provided.\n  const chatId = id || `chat-${uniqueId++}`;\n\n  const key = `${api}|${chatId}`;\n  const {\n    data,\n    mutate: originalMutate,\n    isLoading: isSWRLoading,\n  } = useSWR<Message[]>(key, {\n    fetcher: () => store[key] || initialMessages,\n    fallbackData: initialMessages,\n  });\n\n  const streamData = writable<JSONValue[] | undefined>(undefined);\n\n  const loading = writable<boolean>(false);\n\n  // Force the `data` to be `initialMessages` if it's `undefined`.\n  data.set(initialMessages);\n\n  const mutate = (data: Message[]) => {\n    store[key] = data;\n    return originalMutate(data);\n  };\n\n  // Because of the `fallbackData` option, the `data` will never be `undefined`.\n  const messages = data as Writable<Message[]>;\n\n  // Abort controller to cancel the current API call.\n  let abortController: AbortController | null = null;\n\n  const extraMetadata = {\n    credentials,\n    headers,\n    body,\n  };\n\n  const error = writable<undefined | Error>(undefined);\n\n  // Actual mutation hook to send messages to the API endpoint and update the\n  // chat state.\n  async function triggerRequest(chatRequest: ChatRequest) {\n    const messagesSnapshot = get(messages);\n    const messageCount = messagesSnapshot.length;\n\n    try {\n      error.set(undefined);\n      loading.set(true);\n      abortController = new AbortController();\n\n      await processChatStream({\n        getStreamedResponse: () =>\n          getStreamedResponse(\n            api,\n            chatRequest,\n            mutate,\n            data => {\n              streamData.set(data);\n            },\n            get(streamData),\n            extraMetadata,\n            get(messages),\n            abortController,\n            generateId,\n            streamProtocol,\n            onFinish,\n            onResponse,\n            onToolCall,\n            sendExtraMessageFields,\n            fetch,\n            keepLastMessageOnError,\n          ),\n        experimental_onFunctionCall,\n        experimental_onToolCall,\n        updateChatRequest: chatRequestParam => {\n          chatRequest = chatRequestParam;\n        },\n        getCurrentMessages: () => get(messages),\n      });\n\n      abortController = null;\n    } catch (err) {\n      // Ignore abort errors as they are expected.\n      if ((err as any).name === 'AbortError') {\n        abortController = null;\n        return null;\n      }\n\n      if (onError && err instanceof Error) {\n        onError(err);\n      }\n\n      error.set(err as Error);\n    } finally {\n      loading.set(false);\n    }\n\n    // auto-submit when all tool calls in the last assistant message have results:\n    const newMessagesSnapshot = get(messages);\n\n    const lastMessage = newMessagesSnapshot[newMessagesSnapshot.length - 1];\n    if (\n      // ensure we actually have new messages (to prevent infinite loops in case of errors):\n      newMessagesSnapshot.length > messageCount &&\n      // ensure there is a last message:\n      lastMessage != null &&\n      // check if the feature is enabled:\n      maxToolRoundtrips > 0 &&\n      // check that roundtrip is possible:\n      isAssistantMessageWithCompletedToolCalls(lastMessage) &&\n      // limit the number of automatic roundtrips:\n      countTrailingAssistantMessages(newMessagesSnapshot) <= maxToolRoundtrips\n    ) {\n      await triggerRequest({ messages: newMessagesSnapshot });\n    }\n  }\n\n  const append: UseChatHelpers['append'] = async (\n    message: Message | CreateMessage,\n    {\n      options,\n      functions,\n      function_call,\n      tools,\n      tool_choice,\n      data,\n      headers,\n      body,\n    }: ChatRequestOptions = {},\n  ) => {\n    if (!message.id) {\n      message.id = generateId();\n    }\n\n    const requestOptions = {\n      headers: headers ?? options?.headers,\n      body: body ?? options?.body,\n    };\n\n    const chatRequest: ChatRequest = {\n      messages: get(messages).concat(message as Message),\n      options: requestOptions,\n      headers: requestOptions.headers,\n      body: requestOptions.body,\n      data,\n      ...(functions !== undefined && { functions }),\n      ...(function_call !== undefined && { function_call }),\n      ...(tools !== undefined && { tools }),\n      ...(tool_choice !== undefined && { tool_choice }),\n    };\n    return triggerRequest(chatRequest);\n  };\n\n  const reload: UseChatHelpers['reload'] = async ({\n    options,\n    functions,\n    function_call,\n    tools,\n    tool_choice,\n    data,\n    headers,\n    body,\n  }: ChatRequestOptions = {}) => {\n    const messagesSnapshot = get(messages);\n    if (messagesSnapshot.length === 0) return null;\n\n    const requestOptions = {\n      headers: headers ?? options?.headers,\n      body: body ?? options?.body,\n    };\n\n    // Remove last assistant message and retry last user message.\n    const lastMessage = messagesSnapshot.at(-1);\n    if (lastMessage?.role === 'assistant') {\n      const chatRequest: ChatRequest = {\n        messages: messagesSnapshot.slice(0, -1),\n        options: requestOptions,\n        headers: requestOptions.headers,\n        body: requestOptions.body,\n        data,\n        ...(functions !== undefined && { functions }),\n        ...(function_call !== undefined && { function_call }),\n        ...(tools !== undefined && { tools }),\n        ...(tool_choice !== undefined && { tool_choice }),\n      };\n\n      return triggerRequest(chatRequest);\n    }\n\n    const chatRequest: ChatRequest = {\n      messages: messagesSnapshot,\n      options: requestOptions,\n      headers: requestOptions.headers,\n      body: requestOptions.body,\n      data,\n    };\n\n    return triggerRequest(chatRequest);\n  };\n\n  const stop = () => {\n    if (abortController) {\n      abortController.abort();\n      abortController = null;\n    }\n  };\n\n  const setMessages = (\n    messagesArg: Message[] | ((messages: Message[]) => Message[]),\n  ) => {\n    if (typeof messagesArg === 'function') {\n      messagesArg = messagesArg(get(messages));\n    }\n\n    mutate(messagesArg);\n  };\n\n  const input = writable(initialInput);\n\n  const handleSubmit = (\n    event?: { preventDefault?: () => void },\n    options: ChatRequestOptions = {},\n  ) => {\n    event?.preventDefault?.();\n    const inputValue = get(input);\n\n    if (!inputValue && !options.allowEmptySubmit) return;\n\n    const requestOptions = {\n      headers: options.headers ?? options.options?.headers,\n      body: options.body ?? options.options?.body,\n    };\n\n    const chatRequest: ChatRequest = {\n      messages:\n        !inputValue && options.allowEmptySubmit\n          ? get(messages)\n          : get(messages).concat({\n              id: generateId(),\n              content: inputValue,\n              role: 'user',\n              createdAt: new Date(),\n            } as Message),\n      options: requestOptions,\n      body: requestOptions.body,\n      headers: requestOptions.headers,\n      data: options.data,\n    };\n\n    triggerRequest(chatRequest);\n\n    input.set('');\n  };\n\n  const isLoading = derived(\n    [isSWRLoading, loading],\n    ([$isSWRLoading, $loading]) => {\n      return $isSWRLoading || $loading;\n    },\n  );\n\n  const addToolResult = ({\n    toolCallId,\n    result,\n  }: {\n    toolCallId: string;\n    result: any;\n  }) => {\n    const messagesSnapshot = get(messages) ?? [];\n    const updatedMessages = messagesSnapshot.map((message, index, arr) =>\n      // update the tool calls in the last assistant message:\n      index === arr.length - 1 &&\n      message.role === 'assistant' &&\n      message.toolInvocations\n        ? {\n            ...message,\n            toolInvocations: message.toolInvocations.map(toolInvocation =>\n              toolInvocation.toolCallId === toolCallId\n                ? { ...toolInvocation, result }\n                : toolInvocation,\n            ),\n          }\n        : message,\n    );\n\n    messages.set(updatedMessages);\n\n    // auto-submit when all tool calls in the last assistant message have results:\n    const lastMessage = updatedMessages[updatedMessages.length - 1];\n\n    if (isAssistantMessageWithCompletedToolCalls(lastMessage)) {\n      triggerRequest({ messages: updatedMessages });\n    }\n  };\n\n  return {\n    messages,\n    error,\n    append,\n    reload,\n    stop,\n    setMessages,\n    input,\n    handleSubmit,\n    isLoading,\n    data: streamData,\n    addToolResult,\n  };\n}\n","var P = Object.defineProperty;\nvar F = (r, e, t) => e in r ? P(r, e, { enumerable: !0, configurable: !0, writable: !0, value: t }) : r[e] = t;\nvar h = (r, e, t) => (F(r, typeof e != \"symbol\" ? e + \"\" : e, t), t);\nclass I {\n  constructor() {\n    /**\n     * Stores the list of active listener.s\n     */\n    h(this, \"listeners\", /* @__PURE__ */ new Map());\n  }\n  /**\n   * Subscribes a given listener.\n   */\n  subscribe(e, t) {\n    this.listeners.has(e) || this.listeners.set(e, []), !this.listeners.get(e).includes(t) && this.listeners.get(e).push(t);\n  }\n  /**\n   * Unsubscribes the given listener.\n   */\n  unsubscribe(e, t) {\n    this.listeners.has(e) && this.listeners.get(e).includes(t) && (this.listeners.get(e).splice(this.listeners.get(e).indexOf(t), 1), this.listeners.get(e).length === 0 && this.listeners.delete(e));\n  }\n  /**\n   * Emits an event to all active listeners.\n   */\n  emit(e, t) {\n    this.listeners.has(e) && this.listeners.get(e).forEach((s) => s(t));\n  }\n}\nconst L = {\n  broadcast: !1\n}, S = {\n  broadcast: !1\n};\nclass O {\n  /**\n   * Creates the cache item given the data and expiration at.\n   */\n  constructor({ data: e, expiresAt: t = null }) {\n    /**\n     * Determines the data that's stored in the cache.\n     */\n    h(this, \"data\");\n    /**\n     * Determines the expiration date for the given set of data.\n     */\n    h(this, \"expiresAt\");\n    this.data = e, this.expiresAt = t;\n  }\n  /**\n   * Determines if the current cache item is still being resolved.\n   * This returns true if data is a promise, or false if type `D`.\n   */\n  isResolving() {\n    return this.data instanceof Promise;\n  }\n  /**\n   * Determines if the given cache item has expired.\n   */\n  hasExpired() {\n    return this.expiresAt === null || this.expiresAt < /* @__PURE__ */ new Date();\n  }\n  /**\n   * Set the expiration time of the given cache item relative to now.\n   */\n  expiresIn(e) {\n    return this.expiresAt = /* @__PURE__ */ new Date(), this.expiresAt.setMilliseconds(this.expiresAt.getMilliseconds() + e), this;\n  }\n}\nclass q {\n  constructor() {\n    /**\n     * Stores the elements of the cache in a key-value pair.\n     */\n    h(this, \"elements\", /* @__PURE__ */ new Map());\n    /**\n     * Stores the event target instance to dispatch and receive events.\n     */\n    h(this, \"event\", new I());\n  }\n  /**\n   * Resolves the promise and replaces the Promise to the resolved data.\n   * It also broadcasts the value change if needed or deletes the key if\n   * the value resolves to undefined or null.\n   */\n  resolve(e, t) {\n    Promise.resolve(t.data).then((s) => {\n      if (s == null)\n        return this.remove(e);\n      t.data = s, this.broadcast(e, s);\n    });\n  }\n  /**\n   * Gets an element from the cache.\n   *\n   * It is assumed the item always exist when\n   * you get it. Use the has method to check\n   * for the existence of it.\n   */\n  get(e) {\n    return this.elements.get(e);\n  }\n  /**\n   * Sets an element to the cache.\n   */\n  set(e, t) {\n    this.elements.set(e, t), this.resolve(e, t);\n  }\n  /**\n   * Removes an key-value pair from the cache.\n   */\n  remove(e, t) {\n    const { broadcast: s } = { ...L, ...t };\n    s && this.broadcast(e, void 0), this.elements.delete(e);\n  }\n  /**\n   * Removes all the key-value pairs from the cache.\n   */\n  clear(e) {\n    const { broadcast: t } = { ...S, ...e };\n    if (t)\n      for (const s of this.elements.keys())\n        this.broadcast(s, void 0);\n    this.elements.clear();\n  }\n  /**\n   * Determines if the given key exists\n   * in the cache.\n   */\n  has(e) {\n    return this.elements.has(e);\n  }\n  /**\n   * Subscribes the callback to the given key.\n   */\n  subscribe(e, t) {\n    this.event.subscribe(e, t);\n  }\n  /**\n   * Unsubscribes to the given key events.\n   */\n  unsubscribe(e, t) {\n    this.event.unsubscribe(e, t);\n  }\n  /**\n   * Broadcasts a value change  on all subscribed instances.\n   */\n  broadcast(e, t) {\n    this.event.emit(e, t);\n  }\n}\nconst x = {\n  cache: new q(),\n  errors: new I(),\n  fetcher: async (r) => {\n    const e = await fetch(r);\n    if (!e.ok)\n      throw Error(\"Not a 2XX response.\");\n    return e.json();\n  },\n  fallbackData: void 0,\n  loadInitialCache: !0,\n  revalidateOnStart: !0,\n  dedupingInterval: 2e3,\n  revalidateOnFocus: !0,\n  focusThrottleInterval: 5e3,\n  revalidateOnReconnect: !0,\n  reconnectWhen: (r, { enabled: e }) => e && typeof window < \"u\" ? (window.addEventListener(\"online\", r), () => window.removeEventListener(\"online\", r)) : () => {\n  },\n  focusWhen: (r, { enabled: e, throttleInterval: t }) => {\n    if (e && typeof window < \"u\") {\n      let s = null;\n      const i = () => {\n        const a = Date.now();\n        (s === null || a - s > t) && (s = a, r());\n      };\n      return window.addEventListener(\"focus\", i), () => window.removeEventListener(\"focus\", i);\n    }\n    return () => {\n    };\n  },\n  revalidateFunction: void 0\n}, E = {\n  ...x,\n  force: !1\n}, T = {\n  revalidate: !0,\n  revalidateOptions: { ...E },\n  revalidateFunction: void 0\n}, X = {\n  broadcast: !1\n};\nclass H {\n  /**\n   * Creates a new instance of SWR.\n   */\n  constructor(e) {\n    /**\n     * Stores the options of the SWR.\n     */\n    h(this, \"options\");\n    this.options = { ...x, ...e };\n  }\n  /**\n   * Gets the cache of the SWR.\n   */\n  get cache() {\n    return this.options.cache;\n  }\n  /**\n   * Gets the cache of the SWR.\n   */\n  get errors() {\n    return this.options.errors;\n  }\n  /**\n   * Requests the data using the provided fetcher.\n   */\n  async requestData(e, t) {\n    return await Promise.resolve(t(e)).catch((s) => {\n      throw this.errors.emit(e, s), s;\n    });\n  }\n  /**\n   * Resolves the given to a SWRKey or undefined.\n   */\n  resolveKey(e) {\n    if (typeof e == \"function\")\n      try {\n        return e();\n      } catch {\n        return;\n      }\n    return e;\n  }\n  /**\n   * Clear the specified keys from the cache. If no keys\n   * are specified, it clears all the cache keys.\n   */\n  clear(e, t) {\n    const s = { ...X, ...t };\n    if (e == null)\n      return this.cache.clear(s);\n    if (!Array.isArray(e))\n      return this.cache.remove(e, s);\n    for (const i of e)\n      this.cache.remove(i, s);\n  }\n  /**\n   * Revalidates the key and mutates the cache if needed.\n   */\n  async revalidate(e, t) {\n    if (!e)\n      throw new Error(\"[Revalidate] Key issue: ${key}\");\n    const { fetcher: s, dedupingInterval: i } = this.options, { force: a, fetcher: o, dedupingInterval: n } = {\n      ...E,\n      fetcher: s,\n      dedupingInterval: i,\n      ...t\n    };\n    if (a || !this.cache.has(e) || this.cache.has(e) && this.cache.get(e).hasExpired()) {\n      const c = this.requestData(e, o), l = c.catch(() => {\n      });\n      return this.cache.set(e, new O({ data: l }).expiresIn(n)), await c;\n    }\n    return this.getWait(e);\n  }\n  /**\n   * Mutates the data of a given key with a new value.\n   * This is used to replace the cache contents of the\n   * given key manually.\n   */\n  async mutate(e, t, s) {\n    if (!e)\n      throw new Error(\"[Mutate] Key issue: ${key}\");\n    const {\n      revalidate: i,\n      revalidateOptions: a,\n      revalidateFunction: o\n    } = {\n      ...T,\n      ...s\n    };\n    let n;\n    if (typeof t == \"function\") {\n      let c;\n      if (this.cache.has(e)) {\n        const l = this.cache.get(e);\n        l.isResolving() || (c = l.data);\n      }\n      n = t(c);\n    } else\n      n = t;\n    return this.cache.set(e, new O({ data: n })), i ? await ((o == null ? void 0 : o(e, a)) ?? this.revalidate(e, a)) : n;\n  }\n  /**\n   * Gets the data of the given key. Keep in mind\n   * this data will be stale and revalidate in the background\n   * unless specified otherwise.\n   */\n  subscribeData(e, t) {\n    if (e) {\n      const s = (i) => t(i);\n      return this.cache.subscribe(e, s), () => this.cache.unsubscribe(e, s);\n    }\n    return () => {\n    };\n  }\n  /**\n   * Subscribes to errors on the given key.\n   */\n  subscribeErrors(e, t) {\n    if (e) {\n      const s = (i) => t(i);\n      return this.errors.subscribe(e, s), () => this.errors.unsubscribe(e, s);\n    }\n    return () => {\n    };\n  }\n  /**\n   * Gets the current cached data of the given key.\n   * This does not trigger any revalidation nor mutation\n   * of the data.\n   * - If the data has never been validated\n   * (there is no cache) it will return undefined.\n   * - If the item is pending to resolve (there is a request\n   * pending to resolve) it will return undefined.\n   */\n  get(e) {\n    if (e && this.cache.has(e)) {\n      const t = this.cache.get(e);\n      if (!t.isResolving())\n        return t.data;\n    }\n  }\n  /**\n   * Gets an element from the cache. The difference\n   * with the get is that this method returns a promise\n   * that will resolve the the value. If there's no item\n   * in the cache, it will wait for it before resolving.\n   */\n  getWait(e) {\n    return new Promise((t, s) => {\n      const i = this.subscribeData(e, (n) => {\n        if (i(), n !== void 0)\n          return t(n);\n      }), a = this.subscribeErrors(e, (n) => {\n        if (a(), n !== void 0)\n          return s(n);\n      }), o = this.get(e);\n      if (o !== void 0)\n        return t(o);\n    });\n  }\n  /**\n   * Use a SWR value given the key and\n   * subscribe to future changes.\n   */\n  subscribe(e, t, s, i) {\n    const {\n      fetcher: a,\n      fallbackData: o,\n      loadInitialCache: n,\n      revalidateOnStart: c,\n      dedupingInterval: l,\n      revalidateOnFocus: A,\n      focusThrottleInterval: C,\n      revalidateOnReconnect: R,\n      reconnectWhen: W,\n      focusWhen: D,\n      revalidateFunction: d\n    } = {\n      // Current instance options\n      // (includes default options)\n      ...this.options,\n      // Current call options.\n      ...i\n    }, K = (m) => (d == null ? void 0 : d(this.resolveKey(e), m)) ?? this.revalidate(this.resolveKey(e), m), f = () => K({ fetcher: a, dedupingInterval: l }), u = n ? this.get(this.resolveKey(e)) : o ?? void 0, g = c ? f() : Promise.resolve(void 0), M = u ? Promise.resolve(u) : g;\n    u && (t == null || t(u));\n    const v = t ? this.subscribeData(this.resolveKey(e), t) : void 0, b = s ? this.subscribeErrors(this.resolveKey(e), s) : void 0, p = D(f, {\n      throttleInterval: C,\n      enabled: A\n    }), w = W(f, {\n      enabled: R\n    });\n    return { unsubscribe: () => {\n      v == null || v(), b == null || b(), p == null || p(), w == null || w();\n    }, dataPromise: M, revalidatePromise: g };\n  }\n}\nexport {\n  O as CacheItem,\n  q as DefaultCache,\n  I as DefaultSWREventManager,\n  H as SWR,\n  S as defaultCacheClearOptions,\n  L as defaultCacheRemoveOptions,\n  X as defaultClearOptions,\n  T as defaultMutateOptions,\n  x as defaultOptions,\n  E as defaultRevalidateOptions\n};\n","import { SWR as _ } from \"swrev\";\nimport { beforeUpdate as w, onDestroy as E } from \"svelte\";\nfunction p() {\n}\nfunction D(t) {\n  return t();\n}\nfunction q(t) {\n  t.forEach(D);\n}\nfunction x(t) {\n  return typeof t == \"function\";\n}\nfunction K(t, e) {\n  return t != t ? e == e : t !== e || t && typeof t == \"object\" || typeof t == \"function\";\n}\nfunction z(t, ...e) {\n  if (t == null) {\n    for (const r of e)\n      r(void 0);\n    return p;\n  }\n  const n = t.subscribe(...e);\n  return n.unsubscribe ? () => n.unsubscribe() : n;\n}\nconst v = [];\nfunction A(t, e) {\n  return {\n    subscribe: y(t, e).subscribe\n  };\n}\nfunction y(t, e = p) {\n  let n;\n  const r = /* @__PURE__ */ new Set();\n  function i(u) {\n    if (K(t, u) && (t = u, n)) {\n      const f = !v.length;\n      for (const s of r)\n        s[1](), v.push(s, t);\n      if (f) {\n        for (let s = 0; s < v.length; s += 2)\n          v[s][0](v[s + 1]);\n        v.length = 0;\n      }\n    }\n  }\n  function a(u) {\n    i(u(t));\n  }\n  function d(u, f = p) {\n    const s = [u, f];\n    return r.add(s), r.size === 1 && (n = e(i, a) || p), u(t), () => {\n      r.delete(s), r.size === 0 && n && (n(), n = null);\n    };\n  }\n  return { set: i, update: a, subscribe: d };\n}\nfunction S(t, e, n) {\n  const r = !Array.isArray(t), i = r ? [t] : t;\n  if (!i.every(Boolean))\n    throw new Error(\"derived() expects stores as input, got a falsy value\");\n  const a = e.length < 2;\n  return A(n, (d, u) => {\n    let f = !1;\n    const s = [];\n    let h = 0, o = p;\n    const l = () => {\n      if (h)\n        return;\n      o();\n      const b = e(r ? s[0] : s, d, u);\n      a ? d(b) : o = x(b) ? b : p;\n    }, g = i.map(\n      (b, m) => z(\n        b,\n        (R) => {\n          s[m] = R, h &= ~(1 << m), f && l();\n        },\n        () => {\n          h |= 1 << m;\n        }\n      )\n    );\n    return f = !0, l(), function() {\n      q(g), o(), f = !1;\n    };\n  });\n}\nclass O extends _ {\n  /**\n   * Svelte specific use of SWR.\n   */\n  useSWR(e, n) {\n    let r;\n    const i = y(void 0, () => () => r == null ? void 0 : r()), a = y(void 0, () => () => r == null ? void 0 : r());\n    w(() => {\n      const o = (g) => {\n        a.set(void 0), i.set(g);\n      }, l = (g) => a.set(g);\n      r || (r = this.subscribe(e, o, l, {\n        loadInitialCache: !0,\n        ...n\n      }).unsubscribe);\n    }), E(() => r == null ? void 0 : r());\n    const d = (o, l) => this.mutate(this.resolveKey(e), o, {\n      revalidateOptions: n,\n      ...l\n    }), u = (o) => this.revalidate(this.resolveKey(e), { ...n, ...o }), f = (o) => this.clear(this.resolveKey(e), o), s = S([i, a], ([o, l]) => o === void 0 && l === void 0), h = S([i, a], ([o, l]) => o !== void 0 && l === void 0);\n    return { data: i, error: a, mutate: d, revalidate: u, clear: f, isLoading: s, isValid: h };\n  }\n}\nconst W = (t) => new O(t);\nlet c = W();\nconst C = (t) => (c = W(t), c), I = (t, e) => c.subscribeData(t, e), L = (t, e) => c.subscribeErrors(t, e), U = (t) => c.get(t), V = (t) => c.getWait(t), $ = (t, e, n, r) => c.subscribe(t, e, n, r), F = (t, e) => c.useSWR(t, e), G = (t, e, n) => c.mutate(t, e, n), H = (t, e) => c.revalidate(t, e), J = (t, e) => c.clear(t, e);\nexport {\n  O as SSWR,\n  J as clear,\n  C as createDefaultSWR,\n  W as createSWR,\n  U as get,\n  V as getOrWait,\n  G as mutate,\n  H as revalidate,\n  I as subscribe,\n  L as subscribeErrors,\n  c as swr,\n  $ as use,\n  F as useSWR\n};\n","import type {\n  JSONValue,\n  RequestOptions,\n  UseCompletionOptions,\n} from '@ai-sdk/ui-utils';\nimport { callCompletionApi } from '@ai-sdk/ui-utils';\nimport { useSWR } from 'sswr';\nimport { Readable, Writable, derived, get, writable } from 'svelte/store';\n\nexport type { UseCompletionOptions };\n\nexport type UseCompletionHelpers = {\n  /** The current completion result */\n  completion: Readable<string>;\n  /** The error object of the API request */\n  error: Readable<undefined | Error>;\n  /**\n   * Send a new prompt to the API endpoint and update the completion state.\n   */\n  complete: (\n    prompt: string,\n    options?: RequestOptions,\n  ) => Promise<string | null | undefined>;\n  /**\n   * Abort the current API request but keep the generated tokens.\n   */\n  stop: () => void;\n  /**\n   * Update the `completion` state locally.\n   */\n  setCompletion: (completion: string) => void;\n  /** The current value of the input */\n  input: Writable<string>;\n  /**\n   * Form submission handler to automatically reset input and append a user message\n   * @example\n   * ```jsx\n   * <form onSubmit={handleSubmit}>\n   *  <input onChange={handleInputChange} value={input} />\n   * </form>\n   * ```\n   */\n  handleSubmit: (event?: { preventDefault?: () => void }) => void;\n  /** Whether the API request is in progress */\n  isLoading: Readable<boolean | undefined>;\n\n  /** Additional data added on the server via StreamData */\n  data: Readable<JSONValue[] | undefined>;\n};\n\nlet uniqueId = 0;\n\nconst store: Record<string, any> = {};\n\n/**\n * @deprecated Use `useCompletion` from `@ai-sdk/svelte` instead.\n */\nexport function useCompletion({\n  api = '/api/completion',\n  id,\n  initialCompletion = '',\n  initialInput = '',\n  credentials,\n  headers,\n  body,\n  streamMode,\n  streamProtocol,\n  onResponse,\n  onFinish,\n  onError,\n  fetch,\n}: UseCompletionOptions = {}): UseCompletionHelpers {\n  // streamMode is deprecated, use streamProtocol instead.\n  if (streamMode) {\n    streamProtocol ??= streamMode === 'text' ? 'text' : undefined;\n  }\n\n  // Generate an unique id for the completion if not provided.\n  const completionId = id || `completion-${uniqueId++}`;\n\n  const key = `${api}|${completionId}`;\n  const {\n    data,\n    mutate: originalMutate,\n    isLoading: isSWRLoading,\n  } = useSWR<string>(key, {\n    fetcher: () => store[key] || initialCompletion,\n    fallbackData: initialCompletion,\n  });\n\n  const streamData = writable<JSONValue[] | undefined>(undefined);\n\n  const loading = writable<boolean>(false);\n\n  // Force the `data` to be `initialCompletion` if it's `undefined`.\n  data.set(initialCompletion);\n\n  const mutate = (data: string) => {\n    store[key] = data;\n    return originalMutate(data);\n  };\n\n  // Because of the `fallbackData` option, the `data` will never be `undefined`.\n  const completion = data as Writable<string>;\n\n  const error = writable<undefined | Error>(undefined);\n\n  let abortController: AbortController | null = null;\n\n  const complete: UseCompletionHelpers['complete'] = async (\n    prompt: string,\n    options?: RequestOptions,\n  ) => {\n    const existingData = get(streamData);\n    return callCompletionApi({\n      api,\n      prompt,\n      credentials,\n      headers: {\n        ...headers,\n        ...options?.headers,\n      },\n      body: {\n        ...body,\n        ...options?.body,\n      },\n      streamProtocol,\n      setCompletion: mutate,\n      setLoading: loadingState => loading.set(loadingState),\n      setError: err => error.set(err),\n      setAbortController: controller => {\n        abortController = controller;\n      },\n      onResponse,\n      onFinish,\n      onError,\n      onData(data) {\n        streamData.set([...(existingData || []), ...(data || [])]);\n      },\n      fetch,\n    });\n  };\n\n  const stop = () => {\n    if (abortController) {\n      abortController.abort();\n      abortController = null;\n    }\n  };\n\n  const setCompletion = (completion: string) => {\n    mutate(completion);\n  };\n\n  const input = writable(initialInput);\n\n  const handleSubmit = (event?: { preventDefault?: () => void }) => {\n    event?.preventDefault?.();\n\n    const inputValue = get(input);\n    return inputValue ? complete(inputValue) : undefined;\n  };\n\n  const isLoading = derived(\n    [isSWRLoading, loading],\n    ([$isSWRLoading, $loading]) => {\n      return $isSWRLoading || $loading;\n    },\n  );\n\n  return {\n    completion,\n    complete,\n    error,\n    stop,\n    setCompletion,\n    input,\n    handleSubmit,\n    isLoading,\n    data: streamData,\n  };\n}\n","import { isAbortError } from '@ai-sdk/provider-utils';\nimport type {\n  AssistantStatus,\n  CreateMessage,\n  Message,\n  UseAssistantOptions,\n} from '@ai-sdk/ui-utils';\nimport { generateId, readDataStream } from '@ai-sdk/ui-utils';\nimport { Readable, Writable, get, writable } from 'svelte/store';\n\n// use function to allow for mocking in tests:\nconst getOriginalFetch = () => fetch;\n\nlet uniqueId = 0;\n\nconst store: Record<string, any> = {};\n\nexport type UseAssistantHelpers = {\n  /**\n   * The current array of chat messages.\n   */\n  messages: Readable<Message[]>;\n\n  /**\n   * Update the message store with a new array of messages.\n   */\n  setMessages: (messages: Message[]) => void;\n\n  /**\n   * The current thread ID.\n   */\n  threadId: Readable<string | undefined>;\n\n  /**\n   * The current value of the input field.\n   */\n  input: Writable<string>;\n\n  /**\n   * Append a user message to the chat list. This triggers the API call to fetch\n   * the assistant's response.\n   * @param message The message to append\n   * @param requestOptions Additional options to pass to the API call\n   */\n  append: (\n    message: Message | CreateMessage,\n    requestOptions?: { data?: Record<string, string> },\n  ) => Promise<void>;\n\n  /**\nAbort the current request immediately, keep the generated tokens if any.\n   */\n  stop: () => void;\n\n  /**\n   * Form submission handler that automatically resets the input field and appends a user message.\n   */\n  submitMessage: (\n    event?: { preventDefault?: () => void },\n    requestOptions?: { data?: Record<string, string> },\n  ) => Promise<void>;\n\n  /**\n   * The current status of the assistant. This can be used to show a loading indicator.\n   */\n  status: Readable<AssistantStatus>;\n\n  /**\n   * The error thrown during the assistant message processing, if any.\n   */\n  error: Readable<undefined | Error>;\n};\n\n/**\n * @deprecated Use `useAssistant` from `@ai-sdk/svelte` instead.\n */\nexport function useAssistant({\n  api,\n  threadId: threadIdParam,\n  credentials,\n  headers,\n  body,\n  onError,\n  fetch,\n}: UseAssistantOptions): UseAssistantHelpers {\n  // Generate a unique thread ID\n  const threadIdStore = writable<string | undefined>(threadIdParam);\n\n  // Initialize message, input, status, and error stores\n  const key = `${api}|${threadIdParam ?? `completion-${uniqueId++}`}`;\n  const messages = writable<Message[]>(store[key] || []);\n  const input = writable('');\n  const status = writable<AssistantStatus>('awaiting_message');\n  const error = writable<undefined | Error>(undefined);\n\n  // To manage aborting the current fetch request\n  let abortController: AbortController | null = null;\n\n  // Update the message store\n  const mutateMessages = (newMessages: Message[]) => {\n    store[key] = newMessages;\n    messages.set(newMessages);\n  };\n\n  // Function to handle API calls and state management\n  async function append(\n    message: Message | CreateMessage,\n    requestOptions?: { data?: Record<string, string> },\n  ) {\n    status.set('in_progress');\n    abortController = new AbortController(); // Initialize a new AbortController\n\n    // Add the new message to the existing array\n    mutateMessages([\n      ...get(messages),\n      { ...message, id: message.id ?? generateId() },\n    ]);\n\n    input.set('');\n\n    try {\n      const actualFetch = fetch ?? getOriginalFetch();\n      const response = await actualFetch(api, {\n        method: 'POST',\n        credentials,\n        signal: abortController.signal,\n        headers: { 'Content-Type': 'application/json', ...headers },\n        body: JSON.stringify({\n          ...body,\n          // always use user-provided threadId when available:\n          threadId: threadIdParam ?? get(threadIdStore) ?? null,\n          message: message.content,\n\n          // optional request data:\n          data: requestOptions?.data,\n        }),\n      });\n\n      if (!response.ok) {\n        throw new Error(\n          (await response.text()) ?? 'Failed to fetch the assistant response.',\n        );\n      }\n\n      if (response.body == null) {\n        throw new Error('The response body is empty.');\n      }\n\n      // Read the streamed response data\n      for await (const { type, value } of readDataStream(\n        response.body.getReader(),\n      )) {\n        switch (type) {\n          case 'assistant_message': {\n            mutateMessages([\n              ...get(messages),\n              {\n                id: value.id,\n                role: value.role,\n                content: value.content[0].text.value,\n              },\n            ]);\n            break;\n          }\n\n          case 'text': {\n            // text delta - add to last message:\n            mutateMessages(\n              get(messages).map((msg, index, array) => {\n                if (index === array.length - 1) {\n                  return { ...msg, content: msg.content + value };\n                }\n                return msg;\n              }),\n            );\n            break;\n          }\n\n          case 'data_message': {\n            mutateMessages([\n              ...get(messages),\n              {\n                id: value.id ?? generateId(),\n                role: 'data',\n                content: '',\n                data: value.data,\n              },\n            ]);\n            break;\n          }\n\n          case 'assistant_control_data': {\n            threadIdStore.set(value.threadId);\n\n            mutateMessages(\n              get(messages).map((msg, index, array) => {\n                if (index === array.length - 1) {\n                  return { ...msg, id: value.messageId };\n                }\n                return msg;\n              }),\n            );\n\n            break;\n          }\n\n          case 'error': {\n            error.set(new Error(value));\n            break;\n          }\n        }\n      }\n    } catch (err) {\n      // Ignore abort errors as they are expected when the user cancels the request:\n      if (isAbortError(error) && abortController?.signal?.aborted) {\n        abortController = null;\n        return;\n      }\n\n      if (onError && err instanceof Error) {\n        onError(err);\n      }\n\n      error.set(err as Error);\n    } finally {\n      abortController = null;\n      status.set('awaiting_message');\n    }\n  }\n\n  function setMessages(messages: Message[]) {\n    mutateMessages(messages);\n  }\n\n  function stop() {\n    if (abortController) {\n      abortController.abort();\n      abortController = null;\n    }\n  }\n\n  // Function to handle form submission\n  async function submitMessage(\n    event?: { preventDefault?: () => void },\n    requestOptions?: { data?: Record<string, string> },\n  ) {\n    event?.preventDefault?.();\n    const inputValue = get(input);\n    if (!inputValue) return;\n\n    await append({ role: 'user', content: inputValue }, requestOptions);\n  }\n\n  return {\n    messages,\n    error,\n    threadId: threadIdStore,\n    input,\n    append,\n    submitMessage,\n    status,\n    setMessages,\n    stop,\n  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