function set_userLocale()

in lambda/fulfillment/lib/middleware/multilanguage.js [57:101]

• 42 lines of code
• 13 McCabe index (conditional complexity)

function set_userLocale(Languages, userPreferredLocale, defaultConfidenceScore, req) {
    let locale = '';
    let userDetectedLocaleConfidence = Languages.Languages[0].Score;
    let userDetectedLocale = Languages.Languages[0].LanguageCode;
    let isPreferredLanguageDetected = false;
    let i = 0;
    let userDetectedSecondaryLocale;

    qnabot.log("preferred lang", userPreferredLocale);
    for (i = 0; i <= Languages.Languages.length - 1; i++) {
        qnabot.log("found lang: " + Languages.Languages[i].LanguageCode);
        qnabot.log("score: " + Languages.Languages[i].Score);
        if (Languages.Languages[i].LanguageCode === userPreferredLocale) {
            isPreferredLanguageDetected = true;
            userDetectedLocale = Languages.Languages[i].LanguageCode;
        }
        if (i > 0 && Languages.Languages[i].LanguageCode !== 'en' && userDetectedSecondaryLocale === undefined) {
            userDetectedSecondaryLocale = Languages.Languages[i].LanguageCode;
        }
    }
    qnabot.log("isPreferredLanguageDetected", isPreferredLanguageDetected);
    qnabot.log("detected locale", userDetectedLocale);
    qnabot.log("detected secondary locale", userDetectedSecondaryLocale);
    qnabot.log("detected Confidence", userDetectedLocaleConfidence);

    _.set(req.session, "userDetectedLocale", userDetectedLocale);
    _.set(req.session, "userDetectedLocaleConfidence", userDetectedLocaleConfidence);
    if (userDetectedSecondaryLocale) {
        _.set(req.session, "userDetectedSecondaryLocale", userDetectedSecondaryLocale);
    } else {
        if (req.session.userDetectedSecondaryLocale) delete req.session.userDetectedSecondaryLocale;
    }

    if (userPreferredLocale && userDetectedLocale !== '') {
        locale = userPreferredLocale;
        qnabot.log("set user preference as language to use: ", locale);
    } else if ((userPreferredLocale === undefined || userPreferredLocale === '') && userDetectedLocaleConfidence <= defaultConfidenceScore) {
        locale = 'en'; // default to english
        qnabot.log("Detected language confidence too low, defaulting to English");
    } else {
        locale = userDetectedLocale;
        qnabot.log("set detected language as language to use: ", locale);
    }
    return locale;
}