source: imaps-frontend/node_modules/webpack/lib/javascript/JavascriptGenerator.js

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

"use strict";

const util = require("util");
const { RawSource, ReplaceSource } = require("webpack-sources");
const Generator = require("../Generator");
const InitFragment = require("../InitFragment");
const { JS_TYPES } = require("../ModuleSourceTypesConstants");
const HarmonyCompatibilityDependency = require("../dependencies/HarmonyCompatibilityDependency");

/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("../DependenciesBlock")} DependenciesBlock */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate")} DependencyTemplate */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../DependencyTemplates")} DependencyTemplates */
/** @typedef {import("../Generator").GenerateContext} GenerateContext */
/** @typedef {import("../Module")} Module */
/** @typedef {import("../Module").ConcatenationBailoutReasonContext} ConcatenationBailoutReasonContext */
/** @typedef {import("../Module").SourceTypes} SourceTypes */
/** @typedef {import("../NormalModule")} NormalModule */
/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */

// TODO: clean up this file
// replace with newer constructs

const deprecatedGetInitFragments = util.deprecate(
        /**
         * @param {DependencyTemplate} template template
         * @param {Dependency} dependency dependency
         * @param {DependencyTemplateContext} templateContext template context
         * @returns {InitFragment<GenerateContext>[]} init fragments
         */
        (template, dependency, templateContext) =>
                /** @type {DependencyTemplate & { getInitFragments: function(Dependency, DependencyTemplateContext): InitFragment<GenerateContext>[] }} */
                (template).getInitFragments(dependency, templateContext),
        "DependencyTemplate.getInitFragment is deprecated (use apply(dep, source, { initFragments }) instead)",
        "DEP_WEBPACK_JAVASCRIPT_GENERATOR_GET_INIT_FRAGMENTS"
);

class JavascriptGenerator extends Generator {
        /**
         * @param {NormalModule} module fresh module
         * @returns {SourceTypes} available types (do not mutate)
         */
        getTypes(module) {
                return JS_TYPES;
        }

        /**
         * @param {NormalModule} module the module
         * @param {string=} type source type
         * @returns {number} estimate size of the module
         */
        getSize(module, type) {
                const originalSource = module.originalSource();
                if (!originalSource) {
                        return 39;
                }
                return originalSource.size();
        }

        /**
         * @param {NormalModule} module module for which the bailout reason should be determined
         * @param {ConcatenationBailoutReasonContext} context context
         * @returns {string | undefined} reason why this module can't be concatenated, undefined when it can be concatenated
         */
        getConcatenationBailoutReason(module, context) {
                // Only harmony modules are valid for optimization
                if (
                        !module.buildMeta ||
                        module.buildMeta.exportsType !== "namespace" ||
                        module.presentationalDependencies === undefined ||
                        !module.presentationalDependencies.some(
                                d => d instanceof HarmonyCompatibilityDependency
                        )
                ) {
                        return "Module is not an ECMAScript module";
                }

                // Some expressions are not compatible with module concatenation
                // because they may produce unexpected results. The plugin bails out
                // if some were detected upfront.
                if (module.buildInfo && module.buildInfo.moduleConcatenationBailout) {
                        return `Module uses ${module.buildInfo.moduleConcatenationBailout}`;
                }
        }

        /**
         * @param {NormalModule} module module for which the code should be generated
         * @param {GenerateContext} generateContext context for generate
         * @returns {Source | null} generated code
         */
        generate(module, generateContext) {
                const originalSource = module.originalSource();
                if (!originalSource) {
                        return new RawSource("throw new Error('No source available');");
                }

                const source = new ReplaceSource(originalSource);
                /** @type {InitFragment<GenerateContext>[]} */
                const initFragments = [];

                this.sourceModule(module, initFragments, source, generateContext);

                return InitFragment.addToSource(source, initFragments, generateContext);
        }

        /**
         * @param {Module} module the module to generate
         * @param {InitFragment<GenerateContext>[]} initFragments mutable list of init fragments
         * @param {ReplaceSource} source the current replace source which can be modified
         * @param {GenerateContext} generateContext the generateContext
         * @returns {void}
         */
        sourceModule(module, initFragments, source, generateContext) {
                for (const dependency of module.dependencies) {
                        this.sourceDependency(
                                module,
                                dependency,
                                initFragments,
                                source,
                                generateContext
                        );
                }

                if (module.presentationalDependencies !== undefined) {
                        for (const dependency of module.presentationalDependencies) {
                                this.sourceDependency(
                                        module,
                                        dependency,
                                        initFragments,
                                        source,
                                        generateContext
                                );
                        }
                }

                for (const childBlock of module.blocks) {
                        this.sourceBlock(
                                module,
                                childBlock,
                                initFragments,
                                source,
                                generateContext
                        );
                }
        }

        /**
         * @param {Module} module the module to generate
         * @param {DependenciesBlock} block the dependencies block which will be processed
         * @param {InitFragment<GenerateContext>[]} initFragments mutable list of init fragments
         * @param {ReplaceSource} source the current replace source which can be modified
         * @param {GenerateContext} generateContext the generateContext
         * @returns {void}
         */
        sourceBlock(module, block, initFragments, source, generateContext) {
                for (const dependency of block.dependencies) {
                        this.sourceDependency(
                                module,
                                dependency,
                                initFragments,
                                source,
                                generateContext
                        );
                }

                for (const childBlock of block.blocks) {
                        this.sourceBlock(
                                module,
                                childBlock,
                                initFragments,
                                source,
                                generateContext
                        );
                }
        }

        /**
         * @param {Module} module the current module
         * @param {Dependency} dependency the dependency to generate
         * @param {InitFragment<GenerateContext>[]} initFragments mutable list of init fragments
         * @param {ReplaceSource} source the current replace source which can be modified
         * @param {GenerateContext} generateContext the render context
         * @returns {void}
         */
        sourceDependency(module, dependency, initFragments, source, generateContext) {
                const constructor =
                        /** @type {new (...args: EXPECTED_ANY[]) => Dependency} */
                        (dependency.constructor);
                const template = generateContext.dependencyTemplates.get(constructor);
                if (!template) {
                        throw new Error(
                                `No template for dependency: ${dependency.constructor.name}`
                        );
                }

                /** @type {InitFragment<GenerateContext>[] | undefined} */
                let chunkInitFragments;

                /** @type {DependencyTemplateContext} */
                const templateContext = {
                        runtimeTemplate: generateContext.runtimeTemplate,
                        dependencyTemplates: generateContext.dependencyTemplates,
                        moduleGraph: generateContext.moduleGraph,
                        chunkGraph: generateContext.chunkGraph,
                        module,
                        runtime: generateContext.runtime,
                        runtimeRequirements: generateContext.runtimeRequirements,
                        concatenationScope: generateContext.concatenationScope,
                        codeGenerationResults:
                                /** @type {NonNullable<GenerateContext["codeGenerationResults"]>} */
                                (generateContext.codeGenerationResults),
                        initFragments,
                        get chunkInitFragments() {
                                if (!chunkInitFragments) {
                                        const data =
                                                /** @type {NonNullable<GenerateContext["getData"]>} */
                                                (generateContext.getData)();
                                        chunkInitFragments = data.get("chunkInitFragments");
                                        if (!chunkInitFragments) {
                                                chunkInitFragments = [];
                                                data.set("chunkInitFragments", chunkInitFragments);
                                        }
                                }

                                return chunkInitFragments;
                        }
                };

                template.apply(dependency, source, templateContext);

                // TODO remove in webpack 6
                if ("getInitFragments" in template) {
                        const fragments = deprecatedGetInitFragments(
                                template,
                                dependency,
                                templateContext
                        );

                        if (fragments) {
                                for (const fragment of fragments) {
                                        initFragments.push(fragment);
                                }
                        }
                }
        }
}

module.exports = JavascriptGenerator;