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73 lines
2.1 KiB
73 lines
2.1 KiB
4 years ago
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { RawSource, ReplaceSource } = require("webpack-sources");
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/** @typedef {import("./Dependency")} Dependency */
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/** @typedef {import("./Dependency").DependencyTemplate} DependencyTemplate */
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/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
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/** @typedef {import("./util/createHash").Hash} Hash */
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/** @typedef {(d: Dependency) => boolean} DependencyFilterFunction */
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/** @typedef {Map<Function, DependencyTemplate>} DependencyTemplates */
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class DependenciesBlockVariable {
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/**
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* Creates an instance of DependenciesBlockVariable.
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* @param {string} name name of DependenciesBlockVariable
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* @param {string} expression expression string
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* @param {Dependency[]=} dependencies dependencies tied to this varaiable
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*/
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constructor(name, expression, dependencies) {
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this.name = name;
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this.expression = expression;
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this.dependencies = dependencies || [];
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}
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/**
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* @param {Hash} hash hash for instance to update
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* @returns {void}
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*/
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updateHash(hash) {
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hash.update(this.name);
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hash.update(this.expression);
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for (const d of this.dependencies) {
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d.updateHash(hash);
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}
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}
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/**
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* @param {DependencyTemplates} dependencyTemplates Dependency constructors and templates Map.
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* @param {RuntimeTemplate} runtimeTemplate runtimeTemplate to generate expression souce
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* @returns {ReplaceSource} returns constructed source for expression via templates
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*/
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expressionSource(dependencyTemplates, runtimeTemplate) {
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const source = new ReplaceSource(new RawSource(this.expression));
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for (const dep of this.dependencies) {
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const template = dependencyTemplates.get(dep.constructor);
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if (!template) {
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throw new Error(`No template for dependency: ${dep.constructor.name}`);
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}
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template.apply(dep, source, runtimeTemplate, dependencyTemplates);
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}
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return source;
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}
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disconnect() {
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for (const d of this.dependencies) {
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d.disconnect();
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}
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}
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hasDependencies(filter) {
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if (filter) {
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return this.dependencies.some(filter);
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}
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return this.dependencies.length > 0;
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}
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}
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module.exports = DependenciesBlockVariable;
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