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Viewing file:     DependenciesBlock.js (2.53 KB)      -rw-r--r--

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

"use strict";

const makeSerializable = require("./util/makeSerializable");

/** @typedef {import("./AsyncDependenciesBlock")} AsyncDependenciesBlock */
/** @typedef {import("./ChunkGraph")} ChunkGraph */
/** @typedef {import("./ChunkGroup")} ChunkGroup */
/** @typedef {import("./Dependency")} Dependency */
/** @typedef {import("./Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("./util/Hash")} Hash */

/** @typedef {(d: Dependency) => boolean} DependencyFilterFunction */

class DependenciesBlock {
	constructor() {
		/** @type {Dependency[]} */
		this.dependencies = [];
		/** @type {AsyncDependenciesBlock[]} */
		this.blocks = [];
		/** @type {DependenciesBlock} */
		this.parent = undefined;
	}

	getRootBlock() {
		/** @type {DependenciesBlock} */
		let current = this;
		while (current.parent) current = current.parent;
		return current;
	}

	/**
	 * Adds a DependencyBlock to DependencyBlock relationship.
	 * This is used for when a Module has a AsyncDependencyBlock tie (for code-splitting)
	 *
	 * @param {AsyncDependenciesBlock} block block being added
	 * @returns {void}
	 */
	addBlock(block) {
		this.blocks.push(block);
		block.parent = this;
	}

	/**
	 * @param {Dependency} dependency dependency being tied to block.
	 * This is an "edge" pointing to another "node" on module graph.
	 * @returns {void}
	 */
	addDependency(dependency) {
		this.dependencies.push(dependency);
	}

	/**
	 * @param {Dependency} dependency dependency being removed
	 * @returns {void}
	 */
	removeDependency(dependency) {
		const idx = this.dependencies.indexOf(dependency);
		if (idx >= 0) {
			this.dependencies.splice(idx, 1);
		}
	}

	/**
	 * Removes all dependencies and blocks
	 * @returns {void}
	 */
	clearDependenciesAndBlocks() {
		this.dependencies.length = 0;
		this.blocks.length = 0;
	}

	/**
	 * @param {Hash} hash the hash used to track dependencies
	 * @param {UpdateHashContext} context context
	 * @returns {void}
	 */
	updateHash(hash, context) {
		for (const dep of this.dependencies) {
			dep.updateHash(hash, context);
		}
		for (const block of this.blocks) {
			block.updateHash(hash, context);
		}
	}

	serialize({ write }) {
		write(this.dependencies);
		write(this.blocks);
	}

	deserialize({ read }) {
		this.dependencies = read();
		this.blocks = read();
		for (const block of this.blocks) {
			block.parent = this;
		}
	}
}

makeSerializable(DependenciesBlock, "webpack/lib/DependenciesBlock");

module.exports = DependenciesBlock;