src/browser/GlobalizationProxy.js - cordova-plugin-globalization - Git at Google

 /*
  *
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  *
 */

 var GlobalizationError = require('./GlobalizationError');
 var moment = require('cordova-plugin-globalization.moment');

 function getCrossPlatformLocale() {
     // userLanguage is for IE, which corresponds to selected regional format
     return navigator.userLanguage || navigator.language;
 }

 function stdTimezoneOffset(date) {
     var jan = new Date(date.getFullYear(), 0, 20);
     var jul = new Date(date.getFullYear(), 6, 20);
     return Math.max(jan.getTimezoneOffset(), jul.getTimezoneOffset());
 }

 function dst(date) {
     return date.getTimezoneOffset() < stdTimezoneOffset(date);
 }

 function dstOffsetAbs(date) {
     var janOffset = new Date(date.getFullYear(), 0, 20).getTimezoneOffset();
     var julOffset = new Date(date.getFullYear(), 6, 20).getTimezoneOffset();
     if (janOffset < 0) { janOffset = -janOffset; }
     if (julOffset < 0) { julOffset = -julOffset; }
     var offset =  janOffset - julOffset;
     if (offset < 0) { offset = -offset; }
     return offset;
 }

 function getWeekDayNames(locale, options) {
     var result = [], date;
     for (var i = 0; i < 7; i++) {
         date = new Date(2014, 5, i + 1, 0, 0, 0, 0);
         result[i] = date.toLocaleDateString(locale, options);
     }
     return result;
 }

 function convertToIntlNumberFormatOptions(options) {
     switch (options.type) {
         case 'decimal':
             return { style: 'decimal' };
         case 'currency':
             throw '\'currency\' number type is not supported';
         case 'percent':
             return { style: 'percent' };
         default:
             throw 'The options.type can be \'decimal\', \'percent\' or \'currency\'';
     }
 }

 function convertToMomentLocalizedFormat(options) {
     var selectorError = 'The options.selector can be \'date\', \'time\' or \'date and time\'';
     var formatLengthError = 'The options.formatLength can be \'short\', \'medium\', \'long\', or \'full\'';

     switch (options.formatLength) {
         case 'short':
             switch(options.selector) {
                 case 'date and time': return 'lll';
                 case 'date': return 'l';
                 case 'time': return 'LT';
                 default:
                     throw selectorError;
             }
             break;
         case 'medium':
             switch(options.selector) {
                 case 'date and time': return 'LLL';
                 case 'date': return 'L';
                 case 'time':
                     throw '\'time\' selector does not support \'medium\' formatLength';
                 default:
                     throw selectorError;
             }
             break;
         case 'long':
             switch(options.selector) {
                 case 'date and time': return 'llll';
                 case 'date': return 'll';
                 case 'time':
                     throw '\'time\' selector does not support \'long\' formatLength';
                 default:
                     throw selectorError;
             }
             break;
         case 'full':
             switch(options.selector) {
                 case 'date and time': return 'LLLL';
                 case 'date': return 'LL';
                 case 'time': return 'LTS';
                 default:
                     throw selectorError;
             }
             break;
         default:
             throw formatLengthError;
     }
 }

 function prepareAndGetDateOptions(options) {
     options = options || {formatLength:'short', selector:'date and time'};
     options.formatLength = options.formatLength || 'short';
     options.selector = options.selector || 'date and time';

     return convertToMomentLocalizedFormat(options);
 }

 var globalization = {
     getLocaleName: function(win, fail) {
         try {
             win( { value: getCrossPlatformLocale() });
         } catch (e) {
             fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
         }
     },

     numberToString: function(win, fail, args) {
         try {
             var options = args[0].options || { type : 'decimal' };
             options.type = options.type || 'decimal';

             options = convertToIntlNumberFormatOptions(options);

             var formatter = new Intl.NumberFormat(getCrossPlatformLocale(), options);
             win( { value: formatter.format(args[0].number) });
         } catch (e) {
             fail(new GlobalizationError(GlobalizationError.FORMATTING_ERROR,
                 e.hasOwnProperty('message')? e.message : e));
         }
     },

     isDayLightSavingsTime: function(win, fail, args) {
         try {
             var date = new Date(args[0].date);
             win({ dst: dst(date) });
         } catch (e) {
             fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
         }
     },

     getFirstDayOfWeek: function(win, fail) {
         try {
             var locale = getCrossPlatformLocale();
             moment.locale(locale);
             // Converting ISO format (Monday = 1, Sunday = 7) to what Cordova expects (Sunday = 1, Monday = 2, Saturday = 7)
             var shiftDay = moment().weekday(0).isoWeekday() + 1;
             win({ value: shiftDay % 8 + Math.floor(shiftDay / 8) });
         } catch (e) {
             fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
         }
     },

     getDateNames: function (win, fail, args) {
         try {
             var options = args[0].options || { type: 'wide', item: 'months' };
             var type = options.type || 'wide';
             var item = options.item || 'item';

             var locale = getCrossPlatformLocale();

             if (item === 'months' && type === 'wide') {
                 options = { month: 'long' };
             } else if (item === 'months' && type === 'narrow') {
                 options = { month: 'short'};
             } else if (item === 'days' && type === 'wide') {
                 options = { weekday: 'long'};
             } else if (item === 'days' && type === 'narrow') {
                 options = { weekday: 'short'};
             } else {
                 throw 'Incorrect type or item';
             }

             var result = [];
             if (item === 'months') {
                 for (var i = 0; i < 12; i++) {
                     var date = new Date(2014, i, 20, 0, 0, 0, 0);
                     result[i] = date.toLocaleDateString(locale, options);
                 }
             } else {
                 result = getWeekDayNames(locale, options);
             }

             win({ value: result });
         } catch (e) {
             fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
         }
     },

     getDatePattern: function(win, fail) {
         try {
           var formatter = new Intl.DateTimeFormat(getCrossPlatformLocale());
           var timezone = formatter.hasOwnProperty('resolved') ? formatter.resolved.timeZone : '';
           var dstOffset = dstOffsetAbs(new Date());

           win( {
                 utc_offset: new Date().getTimezoneOffset() * (-60),
                 dst_offset: dstOffset * 60,
                 timezone: timezone,
                 pattern: '',
                });
         } catch (e) {
             fail(new GlobalizationError(GlobalizationError.PATTERN_ERROR,
                 e.hasOwnProperty('message')? e.message : e));
         }
     },

     getNumberPattern: function(win, fail, args) {
         try {
             var options = args[0].options || { type : 'decimal'};
             options.type = options.type || 'decimal';

             options = convertToIntlNumberFormatOptions(options);

             var formatter = new Intl.NumberFormat(getCrossPlatformLocale(), options);

             if (!formatter.hasOwnProperty('resolved')) {
                 fail('Not supported');
                 return;
             }
             var pattern = formatter.resolved.pattern;
             win( {
                 pattern: pattern,
                 symbol: '',
                 fraction: 0,
                 rounding: 0,
                 positive: '',
                 negative: '',
                 decimal: '',
                 grouping: '',
             });
         } catch (e) {
             fail(new GlobalizationError(GlobalizationError.PATTERN_ERROR,
                 e.hasOwnProperty('message')? e.message : e));
         }
     },

     getPreferredLanguage: function(win, fail, args) {
         // Falling back on locale
         globalization.getLocaleName(win, fail);
     },

     getCurrencyPattern: function(win, fail, args) {
         fail('Not supported');
     },

     stringToDate: function(win, fail, args) {
         try {
             var options = prepareAndGetDateOptions(args[0].options);
             moment.locale(getCrossPlatformLocale());

             var date = moment(args[0].dateString, options).toDate();

             win({
                 year: date.getFullYear(),
                 month: date.getMonth(),
                 day: date.getDate(),
                 hour: date.getHours(),
                 minute: date.getMinutes(),
                 second: date.getSeconds(),
                 millisecond: date.getMilliseconds()
             });
         } catch (e) {
             fail(new GlobalizationError(GlobalizationError.PARSING_ERROR,
                     e.hasOwnProperty('message')? e.message : e));
         }
     },

     stringToNumber: function(win, fail, args) {
         fail('Not supported');
     },

     dateToString: function(win, fail, args) {
         try {
             var date = new Date(args[0].date);
             var options = prepareAndGetDateOptions(args[0].options);
             moment.locale(getCrossPlatformLocale());

             win({ value : moment(date).format(options)});
         } catch (e) {
             fail(new GlobalizationError(GlobalizationError.FORMATTING_ERROR,
                     e.hasOwnProperty('message')? e.message : e));
         }
     }
 };

 module.exports = globalization;

 require('cordova/exec/proxy').add('Globalization', module.exports);
	/*
	*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*
	*/

	var GlobalizationError = require('./GlobalizationError');
	var moment = require('cordova-plugin-globalization.moment');

	function getCrossPlatformLocale() {
	// userLanguage is for IE, which corresponds to selected regional format
	return navigator.userLanguage \|\| navigator.language;
	}

	function stdTimezoneOffset(date) {
	var jan = new Date(date.getFullYear(), 0, 20);
	var jul = new Date(date.getFullYear(), 6, 20);
	return Math.max(jan.getTimezoneOffset(), jul.getTimezoneOffset());
	}

	function dst(date) {
	return date.getTimezoneOffset() < stdTimezoneOffset(date);
	}

	function dstOffsetAbs(date) {
	var janOffset = new Date(date.getFullYear(), 0, 20).getTimezoneOffset();
	var julOffset = new Date(date.getFullYear(), 6, 20).getTimezoneOffset();
	if (janOffset < 0) { janOffset = -janOffset; }
	if (julOffset < 0) { julOffset = -julOffset; }
	var offset = janOffset - julOffset;
	if (offset < 0) { offset = -offset; }
	return offset;
	}

	function getWeekDayNames(locale, options) {
	var result = [], date;
	for (var i = 0; i < 7; i++) {
	date = new Date(2014, 5, i + 1, 0, 0, 0, 0);
	result[i] = date.toLocaleDateString(locale, options);
	}
	return result;
	}

	function convertToIntlNumberFormatOptions(options) {
	switch (options.type) {
	case 'decimal':
	return { style: 'decimal' };
	case 'currency':
	throw '\'currency\' number type is not supported';
	case 'percent':
	return { style: 'percent' };
	default:
	throw 'The options.type can be \'decimal\', \'percent\' or \'currency\'';
	}
	}

	function convertToMomentLocalizedFormat(options) {
	var selectorError = 'The options.selector can be \'date\', \'time\' or \'date and time\'';
	var formatLengthError = 'The options.formatLength can be \'short\', \'medium\', \'long\', or \'full\'';

	switch (options.formatLength) {
	case 'short':
	switch(options.selector) {
	case 'date and time': return 'lll';
	case 'date': return 'l';
	case 'time': return 'LT';
	default:
	throw selectorError;
	}
	break;
	case 'medium':
	switch(options.selector) {
	case 'date and time': return 'LLL';
	case 'date': return 'L';
	case 'time':
	throw '\'time\' selector does not support \'medium\' formatLength';
	default:
	throw selectorError;
	}
	break;
	case 'long':
	switch(options.selector) {
	case 'date and time': return 'llll';
	case 'date': return 'll';
	case 'time':
	throw '\'time\' selector does not support \'long\' formatLength';
	default:
	throw selectorError;
	}
	break;
	case 'full':
	switch(options.selector) {
	case 'date and time': return 'LLLL';
	case 'date': return 'LL';
	case 'time': return 'LTS';
	default:
	throw selectorError;
	}
	break;
	default:
	throw formatLengthError;
	}
	}

	function prepareAndGetDateOptions(options) {
	options = options \|\| {formatLength:'short', selector:'date and time'};
	options.formatLength = options.formatLength \|\| 'short';
	options.selector = options.selector \|\| 'date and time';

	return convertToMomentLocalizedFormat(options);
	}

	var globalization = {
	getLocaleName: function(win, fail) {
	try {
	win( { value: getCrossPlatformLocale() });
	} catch (e) {
	fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
	}
	},

	numberToString: function(win, fail, args) {
	try {
	var options = args[0].options \|\| { type : 'decimal' };
	options.type = options.type \|\| 'decimal';

	options = convertToIntlNumberFormatOptions(options);

	var formatter = new Intl.NumberFormat(getCrossPlatformLocale(), options);
	win( { value: formatter.format(args[0].number) });
	} catch (e) {
	fail(new GlobalizationError(GlobalizationError.FORMATTING_ERROR,
	e.hasOwnProperty('message')? e.message : e));
	}
	},

	isDayLightSavingsTime: function(win, fail, args) {
	try {
	var date = new Date(args[0].date);
	win({ dst: dst(date) });
	} catch (e) {
	fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
	}
	},

	getFirstDayOfWeek: function(win, fail) {
	try {
	var locale = getCrossPlatformLocale();
	moment.locale(locale);
	// Converting ISO format (Monday = 1, Sunday = 7) to what Cordova expects (Sunday = 1, Monday = 2, Saturday = 7)
	var shiftDay = moment().weekday(0).isoWeekday() + 1;
	win({ value: shiftDay % 8 + Math.floor(shiftDay / 8) });
	} catch (e) {
	fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
	}
	},

	getDateNames: function (win, fail, args) {
	try {
	var options = args[0].options \|\| { type: 'wide', item: 'months' };
	var type = options.type \|\| 'wide';
	var item = options.item \|\| 'item';

	var locale = getCrossPlatformLocale();

	if (item === 'months' && type === 'wide') {
	options = { month: 'long' };
	} else if (item === 'months' && type === 'narrow') {
	options = { month: 'short'};
	} else if (item === 'days' && type === 'wide') {
	options = { weekday: 'long'};
	} else if (item === 'days' && type === 'narrow') {
	options = { weekday: 'short'};
	} else {
	throw 'Incorrect type or item';
	}

	var result = [];
	if (item === 'months') {
	for (var i = 0; i < 12; i++) {
	var date = new Date(2014, i, 20, 0, 0, 0, 0);
	result[i] = date.toLocaleDateString(locale, options);
	}
	} else {
	result = getWeekDayNames(locale, options);
	}

	win({ value: result });
	} catch (e) {
	fail({ code: 0, message: e.hasOwnProperty('message')? e.message : e });
	}
	},

	getDatePattern: function(win, fail) {
	try {
	var formatter = new Intl.DateTimeFormat(getCrossPlatformLocale());
	var timezone = formatter.hasOwnProperty('resolved') ? formatter.resolved.timeZone : '';
	var dstOffset = dstOffsetAbs(new Date());

	win( {
	utc_offset: new Date().getTimezoneOffset() * (-60),
	dst_offset: dstOffset * 60,
	timezone: timezone,
	pattern: '',
	});
	} catch (e) {
	fail(new GlobalizationError(GlobalizationError.PATTERN_ERROR,
	e.hasOwnProperty('message')? e.message : e));
	}
	},

	getNumberPattern: function(win, fail, args) {
	try {
	var options = args[0].options \|\| { type : 'decimal'};
	options.type = options.type \|\| 'decimal';

	options = convertToIntlNumberFormatOptions(options);

	var formatter = new Intl.NumberFormat(getCrossPlatformLocale(), options);

	if (!formatter.hasOwnProperty('resolved')) {
	fail('Not supported');
	return;
	}
	var pattern = formatter.resolved.pattern;
	win( {
	pattern: pattern,
	symbol: '',
	fraction: 0,
	rounding: 0,
	positive: '',
	negative: '',
	decimal: '',
	grouping: '',
	});
	} catch (e) {
	fail(new GlobalizationError(GlobalizationError.PATTERN_ERROR,
	e.hasOwnProperty('message')? e.message : e));
	}
	},

	getPreferredLanguage: function(win, fail, args) {
	// Falling back on locale
	globalization.getLocaleName(win, fail);
	},

	getCurrencyPattern: function(win, fail, args) {
	fail('Not supported');
	},

	stringToDate: function(win, fail, args) {
	try {
	var options = prepareAndGetDateOptions(args[0].options);
	moment.locale(getCrossPlatformLocale());

	var date = moment(args[0].dateString, options).toDate();

	win({
	year: date.getFullYear(),
	month: date.getMonth(),
	day: date.getDate(),
	hour: date.getHours(),
	minute: date.getMinutes(),
	second: date.getSeconds(),
	millisecond: date.getMilliseconds()
	});
	} catch (e) {
	fail(new GlobalizationError(GlobalizationError.PARSING_ERROR,
	e.hasOwnProperty('message')? e.message : e));
	}
	},

	stringToNumber: function(win, fail, args) {
	fail('Not supported');
	},

	dateToString: function(win, fail, args) {
	try {
	var date = new Date(args[0].date);
	var options = prepareAndGetDateOptions(args[0].options);
	moment.locale(getCrossPlatformLocale());

	win({ value : moment(date).format(options)});
	} catch (e) {
	fail(new GlobalizationError(GlobalizationError.FORMATTING_ERROR,
	e.hasOwnProperty('message')? e.message : e));
	}
	}
	};

	module.exports = globalization;

	require('cordova/exec/proxy').add('Globalization', module.exports);