Get language display names dynamically about node-cldr

[papandreou]

Oh, now I understand. It sounds like you could use bracket notation instead of dot notation for extracting from the object? Like this:

var locales = cldr.localeIds
var languageJsonlist = []
for (var i=0; i < locales.length; i++) {
    var locale = locales[i]
    logger.info(locale)
    logger.info(cldr.extractLanguageDisplayNames('en')[locale])
}

[papandreou]

Basically the object returned by cldr.extractLanguageDisplayNames(...) is exactly the data found in CLDR. In this case it means that there are only display names available for fr (generic French), fr_CA (Canadian French), and fr_CH (Swiss French):

node-cldr/3rdparty/cldr/common/main/en.xml

Lines 192 to 194 in 72e4476

	<language type="fr">French</language>
	<language type="fr_CA">Canadian French</language>
	<language type="fr_CH">Swiss French</language>

I don't know why it's exactly that set of "sublocales" that are included. I guess that means that you'll have to fall back to the "non-suffixed" version so that fr_fr and fr_foobar get a display name of just "French".

Something like:

function lookupDisplayNameForLocale(targetLocaleId, localeId) {
    var languageDisplayNames = cldr.extractLanguageDisplayNames(targetLocaleId);
    var normalizedLocaleFragments = localeId.split(/[_-]/).map(function (fragment) {
        return fragment.toLowerCase();
    });
    for (var i = normalizedLocaleFragments.length ; i > 0 ; i -= 1) {
        var translation = languageDisplayNames[normalizedLocaleFragments.slice(0, i).join('_')];
        if (translation) {
            return translation;
        }
    }
    // No translation found at all :(
}

console.log(lookupDisplayNameForLocale('en', 'fr_fr')); // French

[papandreou]

I'm not sure I understand the question? Could you post an example of the sort of output you need?

In general the extract* functions return values that are quite close to the CLDR XML source, so for most use cases it will require some postprocessing similar to what you already tried.

[weeco]

I am expecting full language name for each locale, like this:

5:41:29 PM - info: zh
5:41:29 PM - info: Chineese

This line is my problem:
cldr.extractLanguageDisplayNames('en').locale

Apparently I can't use a dynamical "locale" (which is a string like 'en', 'de', 'zh') and I am not sure how I can workaround this?

[weeco]

Thanks a lot that was exactly what I was looking for. I am sorry for another question but right after testing I noticed that a lot "language display names" aren't set. Is there a reason for this?

For example:
cldr.extractLanguageDisplayNames('en').fr_fr

I expected that it would output French (France) or simply French. Same applies to de_be, de_it, de_de. Is it just because these languages aren't popular enough or so?