Some common functions for javascript

comm.js

/**
 *@fileOverview JavaScript utils
 *@author ra <ra@rockagen.com>
 *@version 0.0.1
 *@see {@link http://usejsdoc.org|jsdoc}
 *@example
 * 
 * var currency=comm.formatCurrency(123456);
 * //output
 * '123, 456.00'
 *
 * var now=comm.date2String();
 * ...
 *
 */


/** @namespace comm */

(function(exports){ 


	/* 
	 * Restore formatted currency
	 * @param {String} num
	 * @return {Number} num
	 */
	exports.restoreCurrency=function(num){
		var num1=num.replace(',','').replace(/,/g,''); 
		return num1;
	};

	/**
	 * Get a string length
	 * <p><b>provide to zh_CN area</b></p>
	 * @param str
	 * @returns {Number}
	 */
	exports.getLen=function(str) {
		var totalLength = 0;
		var list = str.split("");
		for(var i = 0; i < list.length; i++) {
			var s = list[i];
			if (s.match(/[\u0000-\u00ff]/g)) { //half-width
				totalLength += 1; 
			} else if (s.match(/[\u4e00-\u9fa5]/g)) { //chinese
				totalLength += 2; 
			} else if (s.match(/[\uff00-\uffff]/g)) { //full-width
				totalLength +=2;
			}else{
				totalLength=0;
			}
		}   
		return totalLength;
	};

	/**
	 * Close current window(browser only)
	 */
	exports.close=function(){

		if(!this.isWindow){
			return;
		}
		
		if (navigator.userAgent.indexOf("MSIE") > 0) {

			if (navigator.userAgent.indexOf("MSIE 6.0") > 0) {
				window.opener = null;
				window.close();
			} else {
				window.open('', '_top');
				window.top.close();
			}
		} else if (navigator.userAgent.indexOf("Firefox") > 0) {
			window.location.href = 'about:blank ';
		} else {
			window.opener = null;
			window.open('', '_self', '');
			window.close();
		}
	};

	/**
	 * Go back page
	 * @param {Number} cnt page num
	 */
	exports.goBack=function(cnt){
		if(!this.isWindow){
			return;
		}
		if(undefined == cnt || isNaN(parseInt(cnt,10))){
			history.go(-1);
		}else{
			history.go(0-parseInt(cnt,10));
		}
	};

	/**
	 * Check if "undifined, null,  " contains.
	 * @param {Object} src
	 * @return {Boolean} true if found.
	 */
	exports.isBlank=function(src){
		src =this.trim(src);
		if(src == undefined || src=="null" || src===""){
			return true;
		}else{
			return false;
		}
	};

	/**
	 * Get bytes
	 * @param {String} str
	 * @return {Array} bytes
	 */
	exports.bin=function(str){

		var bytes=[];
		for(var i=0;i<str.length;i++){
			bytes.push(str.charCodeAt(i));
		}
		return bytes; 

	};

	/**
	 * Get enumeration value
	 * @example
	 *  // Enums_LOCALE="en:en_US;zh:zh_CN;";
	 * var locale=getEnumValue("Enums_LOCALE", "en"); // return en_US
	 * @param {Object} enums
	 * @param {Object} key
	 * @return {String} value
	 */
	exports.getEnumValue=function(enums,key){
		if(typeof enums === 'undefined'){
			return "";
		}		
		var idx1 = enums.indexOf(key);
		var idx2 = enums.indexOf(":",idx1);
		var idx3 = enums.indexOf(";",idx2);
		if(-1==idx1 || -1==idx2 || -1==idx3){
			return "";
		}else{
			return enums.substring(idx2+1,idx3);
		}
	};

	/**
	 * Removes all newlines,  
	 * spaces (including non-breaking spaces),  and tabs from the beginning and end of the supplied string
	 * @param {String} str 
	 * @return {String} 
	 */
	exports.trim=function(str) 
	{
		if (typeof str === 'string') return str.replace(/(^\s*)|(\s*$)/g, '');
	};

	/**
	 * Removes all newlines,  
	 * spaces (including non-breaking spaces),  and tabs from the beginning  of the supplied string
	 * @param {String} str 
	 * @return {String} 
	 */
	exports.trimBegin=function(str) 
	{ 
		if (typeof str == 'string') return str.replace(/(^\s*)/g, '');
	};

	/**
	 * Removes all newlines,  
	 * spaces (including non-breaking spaces),  and tabs from the end  of the supplied string
	 * @param {String} str 
	 * @return {String} 
	 */
	exports.trimEnd=function(str) 
	{ 
		if (typeof str == 'string') return str.replace(/(\s*$)/g, '');
	};

	/**
	 * Read cookie by name
	 * @param {String} c_name cookie name
	 * @return {String} cookie value
	 */
	exports.readCookie=function(c_name) {
		if(!this.isWindow){
			return;
		}
		if (document.cookie.length > 0) {
			c_start = document.cookie.indexOf(c_name + "=");
			if (c_start != -1) {
				c_start = c_start + c_name.length + 1;
				c_end = document.cookie.indexOf(";", c_start);
				if (c_end == -1)
					c_end = document.cookie.length;
				return unescape(document.cookie.substring(c_start, c_end));
			}
		}
		return "";
	};

	/**
	 * Write cookie 
	 * @param {String} c_name cookie name
	 * @param {String} value cookie value
	 * @parm {Number}  expiredays expire days
	 */
	exports.writeCookie=function(c_name, value, expiredays) {
		if(!this.isWindow){
			return "";
		}
		var exdate = new Date();
		exdate.setDate(exdate.getDate() + expiredays);
		document.cookie = c_name + "=" + escape(value)+(expiredays ==undefined?"":";expires=" + exdate.toGMTString());

	};

	/**
	 * Check leap year
	 * @param {Date} date
	 * @return {Boolean} true if yes
	 */
	exports.isLeapYear=function(date){
		if(date == undefined){
			date=new Date();
		}
		return (0===date.getYear()%4&&((date.getYear()%100!==0)||(date.getYear()%400===0))); 
	};

	/**
	 * Date to formatted stringyy
	 * @param {Date} date  default is current date, if you not set
	 * @param {String} pattern  
	 * <ul>
	 * <li>YYYY/yyyy/YY/yy years</li>
	 * <li>MM/m months</li>
	 * <li>W/w weeks</li>
	 * <li>DD/dd/D/d days</li>
	 * <li>HH/hh/H/h hours</li>
	 * <li>mm/m minutes</li>
	 * <li>SS/ss/S/s second</li>
	 * </ul>
	 * @return {String} formatted date.
	 */
	exports.date2String=function(date, pattern){
		if(date == undefined){
			date=new Date();
		}
		if(this.isBlank(pattern)){
			pattern="yyyy-MM-dd HH:mm:ss";
		}
		var week = ['Sun','Mon','Tue','Wed','Thur','Fri','Sat'];  
		var str=pattern;
		str=str.replace(/yyyy|YYYY/,date.getFullYear());   
		str=str.replace(/yy|YY/,(date.getYear() % 100)>9?(date.getYear() % 100).toString():'0' + (date.getYear() % 100));   
		str=str.replace(/MM/,date.getMonth()>9?(date.getMonth() + 1):'0' + (date.getMonth() + 1));   
		str=str.replace(/M/g,date.getMonth());   
		str=str.replace(/w|W/g,week[date.getDay()]);   

		str=str.replace(/dd|DD/,date.getDate()>9?date.getDate().toString():'0' + date.getDate());   
		str=str.replace(/d|D/g,date.getDate());   

		str=str.replace(/hh|HH/,date.getHours()>9?date.getHours().toString():'0' + date.getHours());   
		str=str.replace(/h|H/g,date.getHours());   
		str=str.replace(/mm/,date.getMinutes()>9?date.getMinutes().toString():'0' + date.getMinutes());   
		str=str.replace(/m/g,date.getMinutes());   

		str=str.replace(/ss|SS/,date.getSeconds()>9?date.getSeconds().toString():'0' + date.getSeconds());   
		str=str.replace(/s|S/g,date.getSeconds());   

		return str;   
	};

	/**
	 * Date change
	 * @param {String} leve  
	 * <ul>
	 * <li>y year</li>
	 * <li>m month</li>
	 * <li>d day</li>
	 * <li>w week</li>
	 * <li>h  hour</li>
	 * <li>mi minute</li>
	 * <li>s seconds</li>
	 * </ul>
	 * @num {Number} num "+" means add, "-" meas sub
	 * @date {Date}  date 
	 * @return {Date} modified date.
	 */
	exports.dateAdd=function(level, num, date){

		if(date == undefined){
			date =  new Date();
		}
		switch (level) { 
			case 's' :return new Date(date.getTime() + (1000 * num));  
			case 'mi' :return new Date(date.getTime() + (60000 * num));  
			case 'h' :return new Date(date.getTime() + (3600000 * num));  
			case 'w' :return new Date(date.getTime() + ((86400000 * 7) * num));  
			case 'd' :return new Date(date.getTime() + (86400000 * num));  
			case 'm' :return new Date(date.getFullYear(), (date.getMonth()) + num, date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds());  
			case 'y' :return new Date((date.getFullYear() + num), date.getMonth(), date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds());  
		}  
	};

	/**
	 * Diff date
	 * @param {String} level  
	 * <ul>
	 * <li>y year</li>
	 * <li>m month</li>
	 * <li>d day</li>
	 * <li>w week</li>
	 * <li>h  hour</li>
	 * <li>mi minute</li>
	 * <li>s seconds</li>
	 * </ul>
	 * @date {Date}  dateBegin
	 * @date {Date}  dateEnd
	 * @return {Number} time differences
	 *
	 * */
	exports.dateDiff=function(level,dateBegin, dtEnd) {   
		switch (level) {   
			case 's' :return parseInt((dtEnd - dateBegin) / 1000);  
			case 'mi' :return parseInt((dtEnd - dateBegin) / 60000);  
			case 'd' :return parseInt((dtEnd - dateBegin) / 86400000);  
			case 'h' :return parseInt((dtEnd - dateBegin) / 3600000);  
			case 'w' :return parseInt((dtEnd - dateBegin) / (86400000 * 7));  
			case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dateBegin.getFullYear())*12) - (dateBegin.getMonth()+1);  
			case 'y' :return dtEnd.getFullYear() - dateBegin.getFullYear();  
		}  
	};

	/**
	 * Get max day of a month
	 * @param {String} year
	 * @param {String} month
	 * @return {Number} max day 
	 */
	exports.getMaxDay=function(year,month) {     
		if(month==4||month==6||month==9||month==11){
			return 30;
		} 
		if(month==2){
			if(year%4===0&&year%100!==0 || year%400===0){
				return "29";     
			}
			else{
				return "28";     
			}     
		}     
		else{

			return "31";     
		} 
	}; 

	/** 
	 * Formatting currency
	 * @param {Number} num
	 * @return {String} formatted currencies.
	 **/
	exports.formatCurrency=function(num) {
		num = num.toString().replace(/\$|\,/g,'');
		if(isNaN(num))
			num = "0";
		var	sign = (num == (num = Math.abs(num)));
		num = Math.floor(num*100+0.50000000001);
		var cents = num%100;
		num = Math.floor(num/100).toString();
		if(cents<10)
			cents = "0" + cents;
		for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
			num = num.substring(0,num.length-(4*i+3))+','+
				num.substring(num.length-(4*i+3));
		return (((sign)?'':'-')  + num + '.' + cents);
	};

	/**
	 * Get phone number type
	 * <p>For china:</p>
	 * <ul>
	 * <li>0  unknow</li>
	 * <li>1  china mobile (cellphone)</li>
	 * <li>2  china unicom (cellphone)</li>
	 * <li>3  china net (cellphone)</li>
	 * <li>4  china net (telphone)</li>
	 * </ul>
	 * @param {String} num number
	 * @return {Number} number type
	 */
	exports.getPhoneNuType=function(num){
		var _cm = /^(((13[5-9])|(147)|(15[012789])|(18[23478]))\d{8})|(134[0-8])\d{7}$/; 
		var _cu = /^((13[0-2])|(145)|(15[5-6])|(18[5-6]))\d{8}$/; 
		var _ct = /^(((133)|(153)|(18[019]))\d{8})|(1349)\d{7}$/; 
		var _tel= /^((0[12]\d{1}\d{8})|(0[3-9]\d{2}\d{7,8}))$/; 

		if(_cm.test(num)){
			return 1;
		}else if(_cu.test(num)){
			return 2;
		}else if(_ct.test(num)){
			return 3;
		}else if(_tel.test(num)){
			return 4;
		}else{
			return 0;
		}

	};

	/**
	 *
	 * Check browser env?
	 *@return {Boolean} true if has browser env
	 */
	exports.isWindow=typeof window === 'undefined'?false:true;

})(typeof exports === 'undefined'?this.comm={}:exports);