angular2/es6/prod/src/common/pipes/i18n_plural_pipe.js

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import { CONST, isStringMap, StringWrapper, isPresent, RegExpWrapper } from 'angular2/src/facade/lang';
import { Injectable, Pipe } from 'angular2/core';
import { InvalidPipeArgumentException } from './invalid_pipe_argument_exception';
var interpolationExp = RegExpWrapper.create('#');
/**
 *
 *  Maps a value to a string that pluralizes the value properly.
 *
 *  ## Usage
 *
 *  expression | i18nPlural:mapping
 *
 *  where `expression` is a number and `mapping` is an object that indicates the proper text for
 *  when the `expression` evaluates to 0, 1, or some other number.  You can interpolate the actual
 *  value into the text using the `#` sign.
 *
 *  ## Example
 *
 *  ```
 *  <div>
 *    {{ messages.length | i18nPlural: messageMapping }}
 *  </div>
 *
 *  class MyApp {
 *    messages: any[];
 *    messageMapping: any = {
 *      '=0': 'No messages.',
 *      '=1': 'One message.',
 *      'other': '# messages.'
 *    }
 *    ...
 *  }
 *  ```
 *
 */
let I18nPluralPipe_1;
export let I18nPluralPipe = I18nPluralPipe_1 = class I18nPluralPipe {
    transform(value, pluralMap) {
        var key;
        var valueStr;
        if (!isStringMap(pluralMap)) {
            throw new InvalidPipeArgumentException(I18nPluralPipe_1, pluralMap);
        }
        key = value === 0 || value === 1 ? `=${value}` : 'other';
        valueStr = isPresent(value) ? value.toString() : '';
        return StringWrapper.replaceAll(pluralMap[key], interpolationExp, valueStr);
    }
};
I18nPluralPipe = I18nPluralPipe_1 = __decorate([
    CONST(),
    Pipe({ name: 'i18nPlural', pure: true }),
    Injectable(), 
    __metadata('design:paramtypes', [])
], I18nPluralPipe);