def javascript_catalog(request, domain='djangojs', packages=None):
    if request.GET:
        if 'language' in request.GET:
            if check_for_language(request.GET['language']):
                activate(request.GET['language'])
    if packages is None:
        packages = ['django.conf']
    if type(packages) in (str, unicode):
        packages = packages.split('+')
    packages = [p for p in packages if p == 'django.conf' or p in settings.INSTALLED_APPS]
    default_locale = to_locale(settings.LANGUAGE_CODE)
    locale = to_locale(get_language())
    t = {}
    paths = []
    # first load all english languages files for defaults
    for package in packages:
        p = importlib.import_module(package)
        path = os.path.join(os.path.dirname(p.__file__), 'locale')
        paths.append(path)
        try:
            catalog = gettext_module.translation(domain, path, ['en'])
            t.update(catalog._catalog)
        except IOError:
            # 'en' catalog was missing. This is harmless.
            pass
    # next load the settings.LANGUAGE_CODE translations if it isn't english
    if default_locale != 'en':
        for path in paths:
            try:
                catalog = gettext_module.translation(domain, path, [default_locale])
            except IOError:
                catalog = None
            if catalog is not None:
                t.update(catalog._catalog)
    # last load the currently selected language, if it isn't identical to the default.
    if locale != default_locale:
        for path in paths:
            try:
                catalog = gettext_module.translation(domain, path, [locale])
            except IOError:
                catalog = None
            if catalog is not None:
                t.update(catalog._catalog)
    src = [LibHead]
    plural = None
    if '' in t:
        for l in t[''].split('\n'):
            if l.startswith('Plural-Forms:'):
                plural = l.split(':',1)[1].strip()
    if plural is not None:
        # this should actually be a compiled function of a typical plural-form:
        # Plural-Forms: nplurals=3; plural=n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2;
        plural = [el.strip() for el in plural.split(';') if el.strip().startswith('plural=')][0].split('=',1)[1]
        src.append(PluralIdx % plural)
    else:
        src.append(SimplePlural)
    csrc = []
    pdict = {}
    for k, v in t.items():
        if k == '':
            continue
        if type(k) in (str, unicode):
            csrc.append("catalog['%s'] = '%s';\n" % (javascript_quote(k), javascript_quote(v)))
        elif type(k) == tuple:
            if k[0] not in pdict:
                pdict[k[0]] = k[1]
            else:
                pdict[k[0]] = max(k[1], pdict[k[0]])
            csrc.append("catalog['%s'][%d] = '%s';\n" % (javascript_quote(k[0]), k[1], javascript_quote(v)))
        else:
            raise TypeError, k
    csrc.sort()
    for k,v in pdict.items():
        src.append("catalog['%s'] = [%s];\n" % (javascript_quote(k), ','.join(["''"]*(v+1))))
    src.extend(csrc)
    src.append(LibFoot)
    src.append(InterPolate)
    src = ''.join(src)
    return http.HttpResponse(src, 'text/javascript')
Returns the selected language catalog as a javascript library.
dataset/ETHPy150Open CollabQ/CollabQ/vendor/django/views/i18n.py/javascript_catalog