mirror of https://github.com/webpack/webpack.git
63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
/*
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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 parseJson = require("json-parse-better-errors");
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const Parser = require("../Parser");
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const JsonExportsDependency = require("../dependencies/JsonExportsDependency");
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/** @typedef {import("../../declarations/plugins/JsonModulesPluginParser").JsonModulesPluginParserOptions} JsonModulesPluginParserOptions */
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/** @typedef {import("../Parser").ParserState} ParserState */
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/** @typedef {import("../Parser").PreparsedAst} PreparsedAst */
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class JsonParser extends Parser {
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/**
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* @param {JsonModulesPluginParserOptions} options parser options
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*/
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constructor(options) {
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super();
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this.options = options || {};
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}
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/**
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* @param {string | Buffer | PreparsedAst} source the source to parse
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* @param {ParserState} state the parser state
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* @returns {ParserState} the parser state
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*/
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parse(source, state) {
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if (Buffer.isBuffer(source)) {
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source = source.toString("utf-8");
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}
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let data;
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if (typeof this.options.parse === "function") {
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source = this.options.parse.call(null, source);
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if (source && typeof source === "object") {
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data = source;
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}
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}
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if (!data) {
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data =
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typeof source === "object"
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? source
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: parseJson(source[0] === "\ufeff" ? source.slice(1) : source);
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}
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state.module.buildInfo.jsonData = data;
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state.module.buildInfo.strict = true;
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state.module.buildMeta.exportsType = "default";
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state.module.addDependency(
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new JsonExportsDependency(JsonExportsDependency.getExportsFromData(data))
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);
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return state;
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}
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}
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module.exports = JsonParser;
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