source: frontend/node_modules/webpack/lib/dependencies/HarmonyImportSideEffectDependency.js

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

"use strict";

const Module = require("../Module");
const { JAVASCRIPT_TYPE } = require("../ModuleSourceTypeConstants");
const makeSerializable = require("../util/makeSerializable");
const HarmonyImportDependency = require("./HarmonyImportDependency");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").GetConditionFn} GetConditionFn */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../ModuleGraphConnection").ConnectionState} ConnectionState */
/** @typedef {import("../javascript/JavascriptParser").ImportAttributes} ImportAttributes */
/** @typedef {import("./ImportPhase").ImportPhaseType} ImportPhaseType */

class HarmonyImportSideEffectDependency extends HarmonyImportDependency {
        /**
         * Creates an instance of HarmonyImportSideEffectDependency.
         * @param {string} request the request string
         * @param {number} sourceOrder source order
         * @param {ImportPhaseType} phase import phase
         * @param {ImportAttributes=} attributes import attributes
         */
        constructor(request, sourceOrder, phase, attributes) {
                super(request, sourceOrder, phase, attributes);
        }

        get type() {
                return "harmony side effect evaluation";
        }

        /**
         * Returns function to determine if the connection is active.
         * @param {ModuleGraph} moduleGraph module graph
         * @returns {null | false | GetConditionFn} function to determine if the connection is active
         */
        getCondition(moduleGraph) {
                return (connection) => {
                        const refModule = connection.resolvedModule;
                        if (!refModule) return true;
                        return refModule.getSideEffectsConnectionState(moduleGraph);
                };
        }

        /**
         * Gets module evaluation side effects state.
         * @param {ModuleGraph} moduleGraph the module graph
         * @returns {ConnectionState} how this dependency connects the module to referencing modules
         */
        getModuleEvaluationSideEffectsState(moduleGraph) {
                const refModule = moduleGraph.getModule(this);
                if (!refModule) return true;
                return refModule.getSideEffectsConnectionState(moduleGraph);
        }
}

makeSerializable(
        HarmonyImportSideEffectDependency,
        "webpack/lib/dependencies/HarmonyImportSideEffectDependency"
);

HarmonyImportSideEffectDependency.Template = class HarmonyImportSideEffectDependencyTemplate extends (
        HarmonyImportDependency.Template
) {
        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @param {Dependency} dependency the dependency for which the template should be applied
         * @param {ReplaceSource} source the current replace source which can be modified
         * @param {DependencyTemplateContext} templateContext the context object
         * @returns {void}
         */
        apply(dependency, source, templateContext) {
                const { moduleGraph, concatenationScope } = templateContext;

                const module = /** @type {Module} */ (moduleGraph.getModule(dependency));

                if (module && !Module.getSourceBasicTypes(module).has(JAVASCRIPT_TYPE)) {
                        // no need to render import
                        return;
                }

                if (concatenationScope && concatenationScope.isModuleInScope(module)) {
                        return;
                }
                super.apply(dependency, source, templateContext);
        }
};

module.exports = HarmonyImportSideEffectDependency;