function updateLanguageXlfJson()

in tools/i18n/update.js [194:239]
36 lines of code
10 McCabe index (conditional complexity)

function updateLanguageXlfJson(sourceHtmlRelativePath, strings) {
    return Promise.all(langs.map(function (lang) {
        var langJsons = xliffs[lang] || {};
        var xlfJson = langJsons[sourceHtmlRelativePath] || {dirty: true};
        var existingIDs = xlfJson.items ? Object.getOwnPropertyNames(xlfJson.items) : [];

        addXlfJsonProp(xlfJson, 'lang', lang);
        addXlfJsonProp(xlfJson, 'original', sourceHtmlRelativePath);
        addXlfJsonProp(xlfJson, 'items', {});

        var idsRequiringTranslation = [];

        strings.forEach(function (string) {
            var id = string.id;

            var pos = existingIDs.indexOf(id);
            if (pos > -1) {
                existingIDs.splice(pos, 1);
            }

            var existingValue = xlfJson.items[id];
            if (!existingValue || existingValue.text !== string.text) {
                xlfJson.items[id] = {text: string.text, state: NEEDS_TRANSLATION, stateQualifier: MACHINE_SUGGESTION};
                xlfJson.dirty = true;
                idsRequiringTranslation.push(id);
            } else if (existingValue.state === TRANSLATED && existingValue.stateQualifier === MACHINE_SUGGESTION) {
                // Remove 'mt-suggestion' state qualifier if item has been translated
                delete existingValue.stateQualifier;
                xlfJson.dirty = true;
            }
        });

        // If there are any ids left in existingIDs, they should be removed from xlfJson (which will mean they also get
        // removed from the xlf file).
        if (existingIDs.length) {
            xlfJson.dirty = true;
            existingIDs.forEach(function (id) {
                delete xlfJson.items[id];
            });
        }

        return applyTranslations(xlfJson.items, idsRequiringTranslation, lang).then(function () {
            return xlfJson;
        });
    }));
}