@tanstack/db-ivm/dist/cjs/operators/tap.cjs.map

Incremental View Maintenance for TanStack DB based on Differential Dataflow

{"version":3,"file":"tap.cjs","sources":["../../../src/operators/tap.ts"],"sourcesContent":["import { DifferenceStreamWriter, LinearUnaryOperator } from '../graph.js'\nimport { StreamBuilder } from '../d2.js'\nimport type { IStreamBuilder, PipedOperator } from '../types.js'\nimport type { DifferenceStreamReader } from '../graph.js'\nimport type { MultiSet } from '../multiset.js'\n\n/**\n * Operator that applies a function to each multi-set in the input stream\n */\nexport class TapOperator<T> extends LinearUnaryOperator<T, T> {\n  #f: (data: MultiSet<T>) => void\n\n  constructor(\n    id: number,\n    inputA: DifferenceStreamReader<T>,\n    output: DifferenceStreamWriter<T>,\n    f: (data: MultiSet<T>) => void,\n  ) {\n    super(id, inputA, output)\n    this.#f = f\n  }\n\n  inner(collection: MultiSet<T>): MultiSet<T> {\n    this.#f(collection)\n    return collection\n  }\n}\n\n/**\n * Invokes a function for each multi-set in the input stream.\n * This operator doesn't modify the stream and is used to perform side effects.\n * @param f - The function to invoke on each multi-set\n * @returns The input stream\n */\nexport function tap<T>(f: (data: MultiSet<T>) => void): PipedOperator<T, T> {\n  return (stream: IStreamBuilder<T>): IStreamBuilder<T> => {\n    const output = new StreamBuilder<T>(\n      stream.graph,\n      new DifferenceStreamWriter<T>(),\n    )\n    const operator = new TapOperator<T>(\n      stream.graph.getNextOperatorId(),\n      stream.connectReader(),\n      output.writer,\n      f,\n    )\n    stream.graph.addOperator(operator)\n    return output\n  }\n}\n"],"names":["LinearUnaryOperator","StreamBuilder","DifferenceStreamWriter"],"mappings":";;;;AASO,MAAM,oBAAuBA,MAAAA,oBAA0B;AAAA,EAC5D;AAAA,EAEA,YACE,IACA,QACA,QACA,GACA;AACA,UAAM,IAAI,QAAQ,MAAM;AACxB,SAAK,KAAK;AAAA,EACZ;AAAA,EAEA,MAAM,YAAsC;AAC1C,SAAK,GAAG,UAAU;AAClB,WAAO;AAAA,EACT;AACF;AAQO,SAAS,IAAO,GAAqD;AAC1E,SAAO,CAAC,WAAiD;AACvD,UAAM,SAAS,IAAIC,GAAAA;AAAAA,MACjB,OAAO;AAAA,MACP,IAAIC,MAAAA,uBAAA;AAAA,IAA0B;AAEhC,UAAM,WAAW,IAAI;AAAA,MACnB,OAAO,MAAM,kBAAA;AAAA,MACb,OAAO,cAAA;AAAA,MACP,OAAO;AAAA,MACP;AAAA,IAAA;AAEF,WAAO,MAAM,YAAY,QAAQ;AACjC,WAAO;AAAA,EACT;AACF;;;"}