@tanstack/query-core/build/modern/streamedQuery.cjs.map

The framework agnostic core that powers TanStack Query

{"version":3,"sources":["../../src/streamedQuery.ts"],"sourcesContent":["import type { QueryFunction, QueryFunctionContext, QueryKey } from './types'\n\n/**\n * This is a helper function to create a query function that streams data from an AsyncIterable.\n * Data will be an Array of all the chunks received.\n * The query will be in a 'pending' state until the first chunk of data is received, but will go to 'success' after that.\n * The query will stay in fetchStatus 'fetching' until the stream ends.\n * @param queryFn - The function that returns an AsyncIterable to stream data from.\n * @param refetchMode - Defines how re-fetches are handled.\n * Defaults to `'reset'`, erases all data and puts the query back into `pending` state.\n * Set to `'append'` to append new data to the existing data.\n * Set to `'replace'` to write the data to the cache at the end of the stream.\n */\nexport function streamedQuery<\n  TQueryFnData = unknown,\n  TQueryKey extends QueryKey = QueryKey,\n>({\n  queryFn,\n  refetchMode = 'reset',\n}: {\n  queryFn: (\n    context: QueryFunctionContext<TQueryKey>,\n  ) => AsyncIterable<TQueryFnData> | Promise<AsyncIterable<TQueryFnData>>\n  refetchMode?: 'append' | 'reset' | 'replace'\n}): QueryFunction<Array<TQueryFnData>, TQueryKey> {\n  return async (context) => {\n    const query = context.client\n      .getQueryCache()\n      .find({ queryKey: context.queryKey, exact: true })\n    const isRefetch = !!query && query.state.data !== undefined\n\n    if (isRefetch && refetchMode === 'reset') {\n      query.setState({\n        status: 'pending',\n        data: undefined,\n        error: null,\n        fetchStatus: 'fetching',\n      })\n    }\n\n    const result: Array<TQueryFnData> = []\n    const stream = await queryFn(context)\n\n    for await (const chunk of stream) {\n      if (context.signal.aborted) {\n        break\n      }\n\n      // don't append to the cache directly when replace-refetching\n      if (!isRefetch || refetchMode !== 'replace') {\n        context.client.setQueryData<Array<TQueryFnData>>(\n          context.queryKey,\n          (prev = []) => {\n            return prev.concat([chunk])\n          },\n        )\n      }\n      result.push(chunk)\n    }\n\n    // finalize result: replace-refetching needs to write to the cache\n    if (isRefetch && refetchMode === 'replace' && !context.signal.aborted) {\n      context.client.setQueryData<Array<TQueryFnData>>(context.queryKey, result)\n    }\n\n    return context.client.getQueryData(context.queryKey)!\n  }\n}\n"],"mappings":";;;;;;;;;;;;;;;;;;;;AAAA;AAAA;AAAA;AAAA;AAAA;AAaO,SAAS,cAGd;AAAA,EACA;AAAA,EACA,cAAc;AAChB,GAKkD;AAChD,SAAO,OAAO,YAAY;AACxB,UAAM,QAAQ,QAAQ,OACnB,cAAc,EACd,KAAK,EAAE,UAAU,QAAQ,UAAU,OAAO,KAAK,CAAC;AACnD,UAAM,YAAY,CAAC,CAAC,SAAS,MAAM,MAAM,SAAS;AAElD,QAAI,aAAa,gBAAgB,SAAS;AACxC,YAAM,SAAS;AAAA,QACb,QAAQ;AAAA,QACR,MAAM;AAAA,QACN,OAAO;AAAA,QACP,aAAa;AAAA,MACf,CAAC;AAAA,IACH;AAEA,UAAM,SAA8B,CAAC;AACrC,UAAM,SAAS,MAAM,QAAQ,OAAO;AAEpC,qBAAiB,SAAS,QAAQ;AAChC,UAAI,QAAQ,OAAO,SAAS;AAC1B;AAAA,MACF;AAGA,UAAI,CAAC,aAAa,gBAAgB,WAAW;AAC3C,gBAAQ,OAAO;AAAA,UACb,QAAQ;AAAA,UACR,CAAC,OAAO,CAAC,MAAM;AACb,mBAAO,KAAK,OAAO,CAAC,KAAK,CAAC;AAAA,UAC5B;AAAA,QACF;AAAA,MACF;AACA,aAAO,KAAK,KAAK;AAAA,IACnB;AAGA,QAAI,aAAa,gBAAgB,aAAa,CAAC,QAAQ,OAAO,SAAS;AACrE,cAAQ,OAAO,aAAkC,QAAQ,UAAU,MAAM;AAAA,IAC3E;AAEA,WAAO,QAAQ,OAAO,aAAa,QAAQ,QAAQ;AAAA,EACrD;AACF;","names":[]}