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/* 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/. */
"use strict";
module.metadata = {
"stability": "unstable"
};
const { Cc, Ci } = require("chrome");
const { getPreferedLocales, findClosestLocale } = require("./locale");
const { readURI } = require("../net/url");
const { resolve } = require("../core/promise");
function parseJsonURI(uri) {
return readURI(uri).
then(JSON.parse).
then(null, function (error) {
throw Error("Failed to parse locale file:\n" + uri + "\n" + error);
});
}
// Returns the array stored in `locales.json` manifest that list available
// locales files
function getAvailableLocales(rootURI) {
let uri = rootURI + "locales.json";
return parseJsonURI(uri).then(function (manifest) {
return "locales" in manifest &&
Array.isArray(manifest.locales) ?
manifest.locales : [];
});
}
// Returns URI of the best locales file to use from the XPI
function getBestLocale(rootURI) {
// Read localization manifest file that contains list of available languages
return getAvailableLocales(rootURI).then(function (availableLocales) {
// Retrieve list of prefered locales to use
let preferedLocales = getPreferedLocales();
// Compute the most preferable locale to use by using these two lists
return findClosestLocale(availableLocales, preferedLocales);
});
}
/**
* Read localization files and returns a promise of data to put in `@l10n/data`
* pseudo module, in order to allow l10n/core to fetch it.
*/
exports.load = function load(rootURI) {
// First, search for a locale file:
return getBestLocale(rootURI).then(function (bestMatchingLocale) {
// It may be null if the addon doesn't have any locale file
if (!bestMatchingLocale)
return resolve(null);
let localeURI = rootURI + "locale/" + bestMatchingLocale + ".json";
// Locale files only contains one big JSON object that is used as
// an hashtable of: "key to translate" => "translated key"
// TODO: We are likely to change this in order to be able to overload
// a specific key translation. For a specific package, module or line?
return parseJsonURI(localeURI).then(function (json) {
return {
hash: json,
bestMatchingLocale: bestMatchingLocale
};
});
});
}
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