web-streams-extensions/dist/cjs/pipe.cjs

A comprehensive collection of helper methods for WebStreams with built-in backpressure support, inspired by ReactiveExtensions

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.pipe = pipe;
const _readable_like_js_1 = require("./_readable-like.cjs");
const through_js_1 = require("./operators/through.cjs");
const is_transform_js_1 = require("./utils/is-transform.cjs");
function pipe(src, ...args) {
    if ((0, _readable_like_js_1.isReadableLike)(src)) {
        src = src.readable;
    }
    // Extract options from the end of arguments if present
    let options = { highWaterMark: 16 }; // default highWaterMark
    let operators = args;
    // Check if last argument is options (QueuingStrategy)
    const lastArg = args[args.length - 1];
    if (lastArg && typeof lastArg === 'object' &&
        !lastArg.readable && !lastArg.writable &&
        typeof lastArg.pipeThrough !== 'function' &&
        (lastArg.highWaterMark !== undefined || lastArg.size !== undefined)) {
        options = { ...options, ...lastArg };
        operators = args.slice(0, -1);
    }
    return operators
        .map(x => (0, is_transform_js_1.isTransform)(x) ? (0, through_js_1.through)(x) : x)
        .reduce((stream, operator) => {
        return operator(stream, options);
    }, src);
}