init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
const asyncLib = require("neo-async");
 
/** @typedef {import("./MultiCompiler")} MultiCompiler */
/** @typedef {import("./Watching")} Watching */
 
/**
 * @template T
 * @callback Callback
 * @param {(Error | null)=} err
 * @param {T=} result
 */
 
class MultiWatching {
    /**
     * @param {Watching[]} watchings child compilers' watchers
     * @param {MultiCompiler} compiler the compiler
     */
    constructor(watchings, compiler) {
        this.watchings = watchings;
        this.compiler = compiler;
    }
 
    invalidate(callback) {
        if (callback) {
            asyncLib.each(
                this.watchings,
                (watching, callback) => watching.invalidate(callback),
                callback
            );
        } else {
            for (const watching of this.watchings) {
                watching.invalidate();
            }
        }
    }
 
    suspend() {
        for (const watching of this.watchings) {
            watching.suspend();
        }
    }
 
    resume() {
        for (const watching of this.watchings) {
            watching.resume();
        }
    }
 
    /**
     * @param {Callback<void>} callback signals when the watcher is closed
     * @returns {void}
     */
    close(callback) {
        asyncLib.forEach(
            this.watchings,
            (watching, finishedCallback) => {
                watching.close(finishedCallback);
            },
            err => {
                this.compiler.hooks.watchClose.call();
                if (typeof callback === "function") {
                    this.compiler.running = false;
                    callback(err);
                }
            }
        );
    }
}
 
module.exports = MultiWatching;