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Add locale to date_utils #9

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Add locale to date_utils #9

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47 changes: 39 additions & 8 deletions lib/date_utils.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -15,16 +15,47 @@ class Utils {
static String fullDayFormat(DateTime d) => _fullDayFormat.format(d);
static String apiDayFormat(DateTime d) => _apiDayFormat.format(d);

static const List<String> weekdays = const [
"Sun",
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat"
static String _locale = 'en';

static List<String> get weekdays => _getWeekdays();

static const List<String> _locales = const [
"en",
"ja",
"zh",
"ko",
"de",
"fr"
];

static const Map<String, List<String>> weekdaysByLocale = const {
"en": const ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
"ja": const ["日", "月", "火", "水", "木", "金", "土"],
"zh": const ["日", "一", "二", "三", "四", "五", "六"],
"ko": const ["일", "월", "화", "수", "목", "금", "토"],
"de": const ["So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"],
"fr": const ["dim", "lun", "mar", "mer", "jeu", "vev", "sam"],
};

/// Set Locale
static String setLocale(String newLocale) {
if (_locales.contains(newLocale)) {
_locale = newLocale;
} else {
_locale = 'en';
}

return _locale;
}

/// Get Locale
static String get locale => _locale ?? 'en';

/// The list of weekdays
static List<String> _getWeekdays() {
return weekdaysByLocale[locale];
}

/// The list of days in a given month
static List<DateTime> daysInMonth(DateTime month) {
var first = firstDayOfMonth(month);
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36 changes: 36 additions & 0 deletions test/date_utils_test.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -138,4 +138,40 @@ void main() {
});
}
});

group('Locale for weekdays', () {
setUpAll(() => Utils.setLocale('en'));

test('locale in Default', () {
expect(Utils.locale, 'en');
});
test('locale in English', () {
Utils.setLocale('en');
expect(Utils.locale, 'en');
});
test('locale in English and Weekdays in English', () {
expect(Utils.weekdays, const ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]);
});

test('locale in Korean', () {
Utils.setLocale('ko');
expect(Utils.locale, 'ko');
});

test('locale in English (set) and Weekdays in English', () {
Utils.setLocale('en');
expect(Utils.weekdays, const ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]);
});

test('locale in Korean and Weekdays in Korean', () {
Utils.setLocale('ko');
expect(Utils.weekdays, const [ "일","월","화","수","목","금","토"]);
});

test('illegal locale is fallback to English', () {
Utils.setLocale('ILLEGAL LOCALE');
expect(Utils.locale, 'en');
expect(Utils.weekdays, const ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]);
});
});
}