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

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Ivan Kopeykin @vankop
*/

"use strict";

const makeSerializable = require("../util/makeSerializable");
const { ExportPresenceModes } = require("./HarmonyImportDependency");
const HarmonyImportSpecifierDependency = require("./HarmonyImportSpecifierDependency");
const { ImportPhase } = require("./ImportPhase");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../Module").BuildMeta} BuildMeta */
/** @typedef {import("../ModuleGraphConnection")} ModuleGraphConnection */
/** @typedef {import("../javascript/JavascriptParser").ImportAttributes} ImportAttributes */
/** @typedef {import("../javascript/JavascriptParser").Range} Range */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("./HarmonyImportDependency").Ids} Ids */

/**
 * Dependency for static evaluating import specifier. e.g.
 * @example
 * import a from "a";
 * "x" in a;
 * a.x !== undefined; // if x value statically analyzable
 */
class HarmonyEvaluatedImportSpecifierDependency extends HarmonyImportSpecifierDependency {
        /**
         * Creates an instance of HarmonyEvaluatedImportSpecifierDependency.
         * @param {string} request the request string
         * @param {number} sourceOrder source order
         * @param {Ids} ids ids
         * @param {string} name name
         * @param {Range} range location in source code
         * @param {ImportAttributes | undefined} attributes import assertions
         * @param {string} operator operator
         */
        constructor(request, sourceOrder, ids, name, range, attributes, operator) {
                super(
                        request,
                        sourceOrder,
                        ids,
                        name,
                        range,
                        ExportPresenceModes.NONE,
                        ImportPhase.Evaluation,
                        attributes,
                        []
                );
                this.operator = operator;
        }

        get type() {
                return `evaluated X ${this.operator} harmony import specifier`;
        }

        /**
         * Serializes this instance into the provided serializer context.
         * @param {ObjectSerializerContext} context context
         */
        serialize(context) {
                super.serialize(context);
                const { write } = context;
                write(this.operator);
        }

        /**
         * Restores this instance from the provided deserializer context.
         * @param {ObjectDeserializerContext} context context
         */
        deserialize(context) {
                super.deserialize(context);
                const { read } = context;
                this.operator = read();
        }
}

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

HarmonyEvaluatedImportSpecifierDependency.Template = class HarmonyEvaluatedImportSpecifierDependencyTemplate extends (
        HarmonyImportSpecifierDependency.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 dep =
                        /** @type {HarmonyEvaluatedImportSpecifierDependency} */
                        (dependency);
                const { module, moduleGraph, runtime } = templateContext;
                const connection = moduleGraph.getConnection(dep);
                // Skip rendering depending when dependency is conditional
                if (connection && !connection.isTargetActive(runtime)) return;

                const exportsInfo = moduleGraph.getExportsInfo(
                        /** @type {ModuleGraphConnection} */ (connection).module
                );
                const ids = dep.getIds(moduleGraph);

                /** @type {boolean | undefined | null} */
                let value;

                const exportsType =
                        /** @type {ModuleGraphConnection} */
                        (connection).module.getExportsType(
                                moduleGraph,
                                /** @type {BuildMeta} */
                                (module.buildMeta).strictHarmonyModule
                        );
                switch (exportsType) {
                        case "default-with-named": {
                                if (ids[0] === "default") {
                                        value =
                                                ids.length === 1 || exportsInfo.isExportProvided(ids.slice(1));
                                } else {
                                        value = exportsInfo.isExportProvided(ids);
                                }
                                break;
                        }
                        case "namespace": {
                                value =
                                        ids[0] === "__esModule"
                                                ? ids.length === 1 || undefined
                                                : exportsInfo.isExportProvided(ids);
                                break;
                        }
                        case "dynamic": {
                                if (ids[0] !== "default") {
                                        value = exportsInfo.isExportProvided(ids);
                                }
                                break;
                        }
                        // default-only could lead to runtime error, when default value is primitive
                }

                if (typeof value === "boolean") {
                        source.replace(dep.range[0], dep.range[1] - 1, ` ${value}`);
                } else {
                        const usedName = exportsInfo.getUsedName(ids, runtime);

                        const code = this._getCodeForIds(
                                dep,
                                source,
                                templateContext,
                                ids.slice(0, -1)
                        );
                        source.replace(
                                dep.range[0],
                                dep.range[1] - 1,
                                `${
                                        usedName ? JSON.stringify(usedName[usedName.length - 1]) : '""'
                                } in ${code}`
                        );
                }
        }
};

module.exports = HarmonyEvaluatedImportSpecifierDependency;