78 lines
2.3 KiB
JavaScript
78 lines
2.3 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 Parser = require("../Parser");
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const JsonExportsDependency = require("../dependencies/JsonExportsDependency");
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const memoize = require("../util/memoize");
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const JsonData = require("./JsonData");
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/** @typedef {import("../../declarations/plugins/JsonModulesPluginParser").JsonModulesPluginParserOptions} JsonModulesPluginParserOptions */
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/** @typedef {import("../Module").BuildInfo} BuildInfo */
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/** @typedef {import("../Module").BuildMeta} BuildMeta */
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/** @typedef {import("../Parser").ParserState} ParserState */
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/** @typedef {import("../Parser").PreparsedAst} PreparsedAst */
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/** @typedef {import("./JsonModulesPlugin").JsonValue} JsonValue */
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const getParseJson = memoize(() => require("json-parse-even-better-errors"));
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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("utf8");
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}
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/** @type {NonNullable<JsonModulesPluginParserOptions["parse"]>} */
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const parseFn =
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typeof this.options.parse === "function"
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? this.options.parse
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: getParseJson();
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/** @type {Buffer | JsonValue | undefined} */
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let data;
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try {
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data =
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typeof source === "object"
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? source
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: parseFn(source[0] === "\uFEFF" ? source.slice(1) : source);
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} catch (err) {
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throw new Error(
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`Cannot parse JSON: ${/** @type {Error} */ (err).message}`
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);
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}
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const jsonData = new JsonData(/** @type {Buffer | JsonValue} */ (data));
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const buildInfo = /** @type {BuildInfo} */ (state.module.buildInfo);
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buildInfo.jsonData = jsonData;
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buildInfo.strict = true;
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const buildMeta = /** @type {BuildMeta} */ (state.module.buildMeta);
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buildMeta.exportsType = "default";
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buildMeta.defaultObject =
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typeof data === "object" ? "redirect-warn" : false;
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state.module.addDependency(
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new JsonExportsDependency(
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jsonData,
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/** @type {number} */
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(this.options.exportsDepth)
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)
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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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