OpusCapita i18n

Synopsis

Provides data <-> value converters for:

• Dates
• Numbers
• Empty values (Strip to null converter)

Provides simple i18n mechanism for JS applications/modules.

Installation

Using npm

$ npm i --save opuscapita-i18n

Npm scripts

Linting

$ npm run lint

Runing tests

$ npm run test // with coverage
$ npm run testonly // only test resylts

Cleaning work directory (removing built docs, etc.)

$ npm run clean

Usage & API

Converters

Converter is a class that converts a value from its object representation to string one and reverse. All converters (Date, Number, StripToNull) implement the same interface that provides two methods valueToString and stringToValue.

Date Converter

import DateConverter from 'opuscapita-i18n/lib/converters/DateConverter';

let dc = new DateConverter(''MM/dd/yyyy'', 'en');
dc.valueToString(new Date(2001, 0, 15)) === '01/15/2001' // true
dc.stringToValue('01/15/2001').toISOString() === new Date(2001, 0, 15).toISOString() // true

NumberConverter

Format definition is similar to Java's DecimalFormat class, but exponent is not supported

import NumberConverter from 'opuscapita-i18n/lib/converters/NumberConverter';

let nc = new NumberConverter('#,##0.00', ',', '.'); // format, groupSep, decSep, decSepUseAlways = false
nc.valueToString(10000000) === '10,000,000.00' // true
nc.stringToValue('10,000.00') === 10000 // true

Strip to null converter

import StripToNullConverter from 'opuscapita-i18n/lib/converters/StripToNullConverter';

let stnc = new StripToNullConverter();
stnc.valueToString(null) === '' // true
converter.stringToValue('') === null // true

I18nManager

Provides mechanism for internationalization according to the locale (with fallback), passed in the constructor. Also provides facade function for operating with converters, according to format patterns.

import I18nManager from 'opuscapita-i18n/utils/I18nManager';

const formatInfos = {
  'en': {
    datePattern: 'dd/MM/yyyy',
    dateTimePattern: 'dd/MM/yyyy HH:mm:ss',
    integerPattern: '#,##0',
    numberPattern: '#,##0.00#######',
    numberDecimalSeparator: '.',
    numberGroupingSeparator: ',',
    numberGroupingSeparatorUse: true,
  }
};

let i18n = = new I18nManager('en', [{
  locales: ['en'],
  messages: {
    test: 'test',
    format: 'min={min}, max={max}',
    subcomponent: {
      hint: 'nested hint'
    }
  },
}], formatInfos);

// getting simple translation
i18n.getMessage('test') === 'test' // true

// getting translation with attributes
i18n.getMessage('format', { min: 10, max: 100 }) === 'min=10, max=100' // true

// adding translations on runtime
i18n = new I18nManager('de-DE', [], {});
i18n.register('test_component', [
  {
    locales: ['en'],
    messages: {
      component: {
        testMessage1: 'en test message 1',
        testMessage2: 'en test message 2',
      },
    },
  },
  {
    locales: ['de'],
    messages: {
      component: {
        testMessage2: 'de test message 2',
      },
    },
  },
]);

// getting fallback message in default locale (en) in case of error (example de-DE -> de -> en)
i18n.getMessage('component.testMessage1') === 'en test message 1' // true

// getting fallback message in root locale in case of error (example de-DE -> de)
i18n.getMessage('component.testMessage2') === 'de test message 2' // true

// getting fallback message key in case no values were found
i18n.getMessage('component.testMessage3') === 'component.testMessage3' // true

// Converter wrappers
i18n.formatDate(new Date(2001, 0, 10)) === '10/01/2001' //true
i18n.parseDate('10/01/2001').toISOString() === new Date(2001, 0, 10).toISOString() // true
i18n.formatDateTime(new Date(2001, 0, 10)) === '10/01/2001 00:00:00' // true

i18n.formatNumber(10000) === '10,000' // true
i18n.parseNumber('10,000') === 10000 // true

i18n.formatDecimalNumber(10000) === '10,000.00' // true
i18n.parseDecimalNumber('10,000.00') === 10000 // true

// getting some format value
i18n.dateFormat === 'YY' // true

Contributors

• Dmitry Divin [email protected]
• Daniel Zhitomirsky [email protected]
• Alexey Sergeev [email protected]

License

OpusCapita i18n is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.