/*

MIT License http://www.opensource.org/licenses/mit-license.php

Author Tobias Koppers @sokra

*/

"use strict";

const ConcatSource = require("webpack-sources").ConcatSource;

const stringifySafe = data => JSON.stringify(data)

.replace(/\u2028|\u2029/g, str => str === "\u2029" ? "\\u2029" : "\\u2028"); // invalid in JavaScript but valid JSON

class JsonGenerator {

generate(module, dependencyTemplates, runtimeTemplate) {

const source = new ConcatSource();

const data = module.buildInfo.jsonData;

if(Array.isArray(module.buildMeta.providedExports) && !module.isUsed("default")) {

// Only some exports are used: We can optimize here, by only generating a part of the JSON

const reducedJson = {};

for(const exportName of module.buildMeta.providedExports) {

if(exportName === "default")

continue;

const used = module.isUsed(exportName);

if(used) {

reducedJson[used] = data[exportName];

}

}

source.add(`${module.moduleArgument}.exports = ${stringifySafe(reducedJson)};`);

} else {

source.add(`${module.moduleArgument}.exports = ${stringifySafe(data)};`);

}

return source;

}

}

module.exports = JsonGenerator;