/* This Source Code Form is subject to the terms of the Mozilla Public

* License, v. 2.0. If a copy of the MPL was not distributed with this

* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

// @flow

import prettyFast from "pretty-fast";

import { workerUtils } from "devtools-utils";

const { workerHandler } = workerUtils;

type Mappings = {

_array: Mapping[]

};

type Mapping = {

originalLine: number,

originalColumn: number,

source?: string,

generatedLine?: number,

generatedColumn?: number,

name?: string

};

type InvertedMapping = {

generated: Object,

source?: any,

original?: any,

name?: string

};

function prettyPrint({ url, indent, sourceText }) {

const prettified = prettyFast(sourceText, {

url: url,

indent: " ".repeat(indent)

});

return {

code: prettified.code,

mappings: invertMappings(prettified.map._mappings)

};

}

function invertMappings(mappings: Mappings) {

return mappings._array.map((m: Mapping) => {

const mapping: InvertedMapping = {

generated: {

line: m.originalLine,

column: m.originalColumn

}

};

if (m.source) {

mapping.source = m.source;

mapping.original = {

line: m.generatedLine,

column: m.generatedColumn

};

mapping.name = m.name;

}

return mapping;

});

}

self.onmessage = workerHandler({ prettyPrint });