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JsonExportsDependency.js
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Sun, Feb 9, 20:45

JsonExportsDependency.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const makeSerializable = require("../util/makeSerializable");
const NullDependency = require("./NullDependency");
/** @typedef {import("../ChunkGraph")} ChunkGraph */
/** @typedef {import("../Dependency").ExportSpec} ExportSpec */
/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../util/Hash")} Hash */
const getExportsFromData = data => {
if (data && typeof data === "object") {
if (Array.isArray(data)) {
return data.map((item, idx) => {
return {
name: `${idx}`,
canMangle: true,
exports: getExportsFromData(item)
};
});
} else {
const exports = [];
for (const key of Object.keys(data)) {
exports.push({
name: key,
canMangle: true,
exports: getExportsFromData(data[key])
});
}
return exports;
}
}
return undefined;
};
class JsonExportsDependency extends NullDependency {
/**
* @param {(string | ExportSpec)[]} exports json exports
*/
constructor(exports) {
super();
this.exports = exports;
}
get type() {
return "json exports";
}
/**
* Returns the exported names
* @param {ModuleGraph} moduleGraph module graph
* @returns {ExportsSpec | undefined} export names
*/
getExports(moduleGraph) {
return {
exports: this.exports,
dependencies: undefined
};
}
/**
* Update the hash
* @param {Hash} hash hash to be updated
* @param {UpdateHashContext} context context
* @returns {void}
*/
updateHash(hash, context) {
hash.update(this.exports ? JSON.stringify(this.exports) : "undefined");
super.updateHash(hash, context);
}
serialize(context) {
const { write } = context;
write(this.exports);
super.serialize(context);
}
deserialize(context) {
const { read } = context;
this.exports = read();
super.deserialize(context);
}
}
makeSerializable(
JsonExportsDependency,
"webpack/lib/dependencies/JsonExportsDependency"
);
module.exports = JsonExportsDependency;
module.exports.getExportsFromData = getExportsFromData;

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