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JsonParser.js
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Sun, Feb 9, 23:02

JsonParser.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const parseJson = require("json-parse-better-errors");
const Parser = require("../Parser");
const JsonExportsDependency = require("../dependencies/JsonExportsDependency");
/** @typedef {import("../../declarations/plugins/JsonModulesPluginParser").JsonModulesPluginParserOptions} JsonModulesPluginParserOptions */
/** @typedef {import("../Parser").ParserState} ParserState */
/** @typedef {import("../Parser").PreparsedAst} PreparsedAst */
class JsonParser extends Parser {
/**
* @param {JsonModulesPluginParserOptions} options parser options
*/
constructor(options) {
super();
this.options = options || {};
}
/**
* @param {string | Buffer | PreparsedAst} source the source to parse
* @param {ParserState} state the parser state
* @returns {ParserState} the parser state
*/
parse(source, state) {
if (Buffer.isBuffer(source)) {
source = source.toString("utf-8");
}
/** @type {JsonModulesPluginParserOptions["parse"]} */
const parseFn =
typeof this.options.parse === "function" ? this.options.parse : parseJson;
const data =
typeof source === "object"
? source
: parseFn(source[0] === "\ufeff" ? source.slice(1) : source);
state.module.buildInfo.jsonData = data;
state.module.buildInfo.strict = true;
state.module.buildMeta.exportsType = "default";
state.module.buildMeta.defaultObject =
typeof data === "object" ? "redirect-warn" : false;
state.module.addDependency(
new JsonExportsDependency(JsonExportsDependency.getExportsFromData(data))
);
return state;
}
}
module.exports = JsonParser;

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