source: imaps-frontend/node_modules/webpack/lib/ids/ChunkModuleIdRangePlugin.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const { find } = require("../util/SetHelpers");
const {
        compareModulesByPreOrderIndexOrIdentifier,
        compareModulesByPostOrderIndexOrIdentifier
} = require("../util/comparators");

/** @typedef {import("../Compiler")} Compiler */

/**
 * @typedef {object} ChunkModuleIdRangePluginOptions
 * @property {string} name the chunk name
 * @property {("index" | "index2" | "preOrderIndex" | "postOrderIndex")=} order order
 * @property {number=} start start id
 * @property {number=} end end id
 */

class ChunkModuleIdRangePlugin {
        /**
         * @param {ChunkModuleIdRangePluginOptions} options options object
         */
        constructor(options) {
                this.options = options;
        }

        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                const options = this.options;
                compiler.hooks.compilation.tap("ChunkModuleIdRangePlugin", compilation => {
                        const moduleGraph = compilation.moduleGraph;
                        compilation.hooks.moduleIds.tap("ChunkModuleIdRangePlugin", modules => {
                                const chunkGraph = compilation.chunkGraph;
                                const chunk = find(
                                        compilation.chunks,
                                        chunk => chunk.name === options.name
                                );
                                if (!chunk) {
                                        throw new Error(
                                                `ChunkModuleIdRangePlugin: Chunk with name '${options.name}"' was not found`
                                        );
                                }

                                let chunkModules;
                                if (options.order) {
                                        let cmpFn;
                                        switch (options.order) {
                                                case "index":
                                                case "preOrderIndex":
                                                        cmpFn = compareModulesByPreOrderIndexOrIdentifier(moduleGraph);
                                                        break;
                                                case "index2":
                                                case "postOrderIndex":
                                                        cmpFn = compareModulesByPostOrderIndexOrIdentifier(moduleGraph);
                                                        break;
                                                default:
                                                        throw new Error(
                                                                "ChunkModuleIdRangePlugin: unexpected value of order"
                                                        );
                                        }
                                        chunkModules = chunkGraph.getOrderedChunkModules(chunk, cmpFn);
                                } else {
                                        chunkModules = Array.from(modules)
                                                .filter(m => chunkGraph.isModuleInChunk(m, chunk))
                                                .sort(compareModulesByPreOrderIndexOrIdentifier(moduleGraph));
                                }

                                let currentId = options.start || 0;
                                for (let i = 0; i < chunkModules.length; i++) {
                                        const m = chunkModules[i];
                                        if (m.needId && chunkGraph.getModuleId(m) === null) {
                                                chunkGraph.setModuleId(m, currentId++);
                                        }
                                        if (options.end && currentId > options.end) break;
                                }
                        });
                });
        }
}
module.exports = ChunkModuleIdRangePlugin;