src/flash/com/adobe/utils/DateUtil.as
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*/
package com.adobe.utils
{
import com.adobe.utils.ArrayUtil;
import mx.formatters.DateBase;
/**
* Class that contains static utility methods for manipulating and working
* with Dates.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*/
public class DateUtil
{
/**
* Returns the English Short Month name (3 letters) for the Month that
* the Date represents.
*
* @param d The Date instance whose month will be used to retrieve the
* short month name.
*
* @return An English 3 Letter Month abbreviation.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see SHORT_MONTH
*/
public static function getShortMonthName(d:Date):String
{
return DateBase.monthNamesShort[d.getMonth()];
}
/**
* Returns the index of the month that the short month name string
* represents.
*
* @param m The 3 letter abbreviation representing a short month name.
*
* @param Optional parameter indicating whether the search should be case
* sensitive
*
* @return A int that represents that month represented by the specifed
* short name.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see SHORT_MONTH
*/
public static function getShortMonthIndex(m:String):int
{
return DateBase.monthNamesShort.indexOf(m);
}
/**
* Returns the English full Month name for the Month that
* the Date represents.
*
* @param d The Date instance whose month will be used to retrieve the
* full month name.
*
* @return An English full month name.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see FULL_MONTH
*/
public static function getFullMonthName(d:Date):String
{
return DateBase.monthNamesLong[d.getMonth()];
}
/**
* Returns the index of the month that the full month name string
* represents.
*
* @param m A full month name.
*
* @return A int that represents that month represented by the specifed
* full month name.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see FULL_MONTH
*/
public static function getFullMonthIndex(m:String):int
{
return DateBase.monthNamesLong.indexOf(m);
}
/**
* Returns the English Short Day name (3 letters) for the day that
* the Date represents.
*
* @param d The Date instance whose day will be used to retrieve the
* short day name.
*
* @return An English 3 Letter day abbreviation.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see SHORT_DAY
*/
public static function getShortDayName(d:Date):String
{
return DateBase.dayNamesShort[d.getDay()];
}
/**
* Returns the index of the day that the short day name string
* represents.
*
* @param m A short day name.
*
* @return A int that represents that short day represented by the specifed
* full month name.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see SHORT_DAY
*/
public static function getShortDayIndex(d:String):int
{
return DateBase.dayNamesShort.indexOf(d);
}
/**
* Returns the English full day name for the day that
* the Date represents.
*
* @param d The Date instance whose day will be used to retrieve the
* full day name.
*
* @return An English full day name.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see FULL_DAY
*/
public static function getFullDayName(d:Date):String
{
return DateBase.dayNamesLong[d.getDay()];
}
/**
* Returns the index of the day that the full day name string
* represents.
*
* @param m A full day name.
*
* @return A int that represents that full day represented by the specifed
* full month name.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see FULL_DAY
*/
public static function getFullDayIndex(d:String):int
{
return DateBase.dayNamesLong.indexOf(d);
}
/**
* Returns a two digit representation of the year represented by the
* specified date.
*
* @param d The Date instance whose year will be used to generate a two
* digit string representation of the year.
*
* @return A string that contains a 2 digit representation of the year.
* Single digits will be padded with 0.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*/
public static function getShortYear(d:Date):String
{
var dStr:String = String(d.getFullYear());
if(dStr.length < 3)
{
return dStr;
}
return (dStr.substr(dStr.length - 2));
}
/**
* Compares two dates and returns an integer depending on their relationship.
*
* Returns -1 if d1 is greater than d2.
* Returns 1 if d2 is greater than d1.
* Returns 0 if both dates are equal.
*
* @param d1 The date that will be compared to the second date.
* @param d2 The date that will be compared to the first date.
*
* @return An int indicating how the two dates compare.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*/
public static function compareDates(d1:Date, d2:Date):int
{
var d1ms:Number = d1.getTime();
var d2ms:Number = d2.getTime();
if(d1ms > d2ms)
{
return -1;
}
else if(d1ms < d2ms)
{
return 1;
}
else
{
return 0;
}
}
/**
* Returns a short hour (0 - 12) represented by the specified date.
*
* If the hour is less than 12 (0 - 11 AM) then the hour will be returned.
*
* If the hour is greater than 12 (12 - 23 PM) then the hour minus 12
* will be returned.
*
* @param d1 The Date from which to generate the short hour
*
* @return An int between 0 and 13 ( 1 - 12 ) representing the short hour.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*/
public static function getShortHour(d:Date):int
{
var h:int = d.hours;
if(h == 0 || h == 12)
{
return 12;
}
else if(h > 12)
{
return h - 12;
}
else
{
return h;
}
}
/**
* Returns a string indicating whether the date represents a time in the
* ante meridiem (AM) or post meridiem (PM).
*
* If the hour is less than 12 then "AM" will be returned.
*
* If the hour is greater than 12 then "PM" will be returned.
*
* @param d1 The Date from which to generate the 12 hour clock indicator.
*
* @return A String ("AM" or "PM") indicating which half of the day the
* hour represents.
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*/
public static function getAMPM(d:Date):String
{
return (d.hours > 11)? "PM" : "AM";
}
/**
* Parses dates that conform to RFC822 into Date objects. This method also
* supports four-digit years (not supported in RFC822), but two-digit years
* (referring to the 20th century) are fine, too.
*
* This function is useful for parsing RSS .91, .92, and 2.0 dates.
*
* @param str
*
* @returns
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see http://asg.web.cmu.edu/rfc/rfc822.html
*/
public static function parseRFC822(str:String):Date
{
var finalDate:Date;
try
{
var dateParts:Array = str.split(" ");
var day:String = null;
if (dateParts[0].search(/\d/) == -1)
{
day = dateParts.shift().replace(/\W/, "");
}
var date:Number = Number(dateParts.shift());
var month:Number = Number(DateUtil.getShortMonthIndex(dateParts.shift()));
var year:Number = Number(dateParts.shift());
var timeParts:Array = dateParts.shift().split(":");
var hour:Number = int(timeParts.shift());
var minute:Number = int(timeParts.shift());
var second:Number = (timeParts.length > 0) ? int(timeParts.shift()): 0;
var milliseconds:Number = Date.UTC(year, month, date, hour, minute, second, 0);
var timezone:String = dateParts.shift();
var offset:Number = 0;
if (timezone.search(/\d/) == -1)
{
switch(timezone)
{
case "UT":
offset = 0;
break;
case "UTC":
offset = 0;
break;
case "GMT":
offset = 0;
break;
case "EST":
offset = (-5 * 3600000);
break;
case "EDT":
offset = (-4 * 3600000);
break;
case "CST":
offset = (-6 * 3600000);
break;
case "CDT":
offset = (-5 * 3600000);
break;
case "MST":
offset = (-7 * 3600000);
break;
case "MDT":
offset = (-6 * 3600000);
break;
case "PST":
offset = (-8 * 3600000);
break;
case "PDT":
offset = (-7 * 3600000);
break;
case "Z":
offset = 0;
break;
case "A":
offset = (-1 * 3600000);
break;
case "M":
offset = (-12 * 3600000);
break;
case "N":
offset = (1 * 3600000);
break;
case "Y":
offset = (12 * 3600000);
break;
default:
offset = 0;
}
}
else
{
var multiplier:Number = 1;
var oHours:Number = 0;
var oMinutes:Number = 0;
if (timezone.length != 4)
{
if (timezone.charAt(0) == "-")
{
multiplier = -1;
}
timezone = timezone.substr(1, 4);
}
oHours = Number(timezone.substr(0, 2));
oMinutes = Number(timezone.substr(2, 2));
offset = (((oHours * 3600000) + (oMinutes * 60000)) * multiplier);
}
finalDate = new Date(milliseconds - offset);
if (finalDate.toString() == "Invalid Date")
{
throw new Error("This date does not conform to RFC822.");
}
}
catch (e:Error)
{
var eStr:String = "Unable to parse the string [" +str+ "] into a date. ";
eStr += "The internal error was: " + e.toString();
throw new Error(eStr);
}
return finalDate;
}
/**
* Returns a date string formatted according to RFC822.
*
* @param d
*
* @returns
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see http://asg.web.cmu.edu/rfc/rfc822.html
*/
public static function toRFC822(d:Date):String
{
var date:Number = d.getUTCDate();
var hours:Number = d.getUTCHours();
var minutes:Number = d.getUTCMinutes();
var seconds:Number = d.getUTCSeconds();
var sb:String = new String();
sb += DateBase.dayNamesShort[d.getUTCDay()];
sb += ", ";
if (date < 10)
{
sb += "0";
}
sb += date;
sb += " ";
//sb += DateUtil.SHORT_MONTH[d.getUTCMonth()];
sb += DateBase.monthNamesShort[d.getUTCMonth()];
sb += " ";
sb += d.getUTCFullYear();
sb += " ";
if (hours < 10)
{
sb += "0";
}
sb += hours;
sb += ":";
if (minutes < 10)
{
sb += "0";
}
sb += minutes;
sb += ":";
if (seconds < 10)
{
sb += "0";
}
sb += seconds;
sb += " GMT";
return sb;
}
/**
* Parses dates that conform to the W3C Date-time Format into Date objects.
*
* This function is useful for parsing RSS 1.0 and Atom 1.0 dates.
*
* @param str
*
* @returns
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see http://www.w3.org/TR/NOTE-datetime
*/
public static function parseW3CDTF(str:String):Date
{
var finalDate:Date;
try
{
var dateStr:String = str.substring(0, str.indexOf("T"));
var timeStr:String = str.substring(str.indexOf("T")+1, str.length);
var dateArr:Array = dateStr.split("-");
var year:Number = Number(dateArr.shift());
var month:Number = Number(dateArr.shift());
var date:Number = Number(dateArr.shift());
var multiplier:Number;
var offsetHours:Number;
var offsetMinutes:Number;
var offsetStr:String;
if (timeStr.indexOf("Z") != -1)
{
multiplier = 1;
offsetHours = 0;
offsetMinutes = 0;
timeStr = timeStr.replace("Z", "");
}
else if (timeStr.indexOf("+") != -1)
{
multiplier = 1;
offsetStr = timeStr.substring(timeStr.indexOf("+")+1, timeStr.length);
offsetHours = Number(offsetStr.substring(0, offsetStr.indexOf(":")));
offsetMinutes = Number(offsetStr.substring(offsetStr.indexOf(":")+1, offsetStr.length));
timeStr = timeStr.substring(0, timeStr.indexOf("+"));
}
else // offset is -
{
multiplier = -1;
offsetStr = timeStr.substring(timeStr.indexOf("-")+1, timeStr.length);
offsetHours = Number(offsetStr.substring(0, offsetStr.indexOf(":")));
offsetMinutes = Number(offsetStr.substring(offsetStr.indexOf(":")+1, offsetStr.length));
timeStr = timeStr.substring(0, timeStr.indexOf("-"));
}
var timeArr:Array = timeStr.split(":");
var hour:Number = Number(timeArr.shift());
var minutes:Number = Number(timeArr.shift());
var secondsArr:Array = (timeArr.length > 0) ? String(timeArr.shift()).split(".") : null;
var seconds:Number = (secondsArr != null && secondsArr.length > 0) ? Number(secondsArr.shift()) : 0;
var milliseconds:Number = (secondsArr != null && secondsArr.length > 0) ? Number(secondsArr.shift()) : 0;
var utc:Number = Date.UTC(year, month-1, date, hour, minutes, seconds, milliseconds);
var offset:Number = (((offsetHours * 3600000) + (offsetMinutes * 60000)) * multiplier);
finalDate = new Date(utc - offset);
if (finalDate.toString() == "Invalid Date")
{
throw new Error("This date does not conform to W3CDTF.");
}
}
catch (e:Error)
{
var eStr:String = "Unable to parse the string [" +str+ "] into a date. ";
eStr += "The internal error was: " + e.toString();
throw new Error(eStr);
}
return finalDate;
}
/**
* Returns a date string formatted according to W3CDTF.
*
* @param d
* @param includeMilliseconds Determines whether to include the
* milliseconds value (if any) in the formatted string.
*
* @returns
*
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*
* @see http://www.w3.org/TR/NOTE-datetime
*/
public static function toW3CDTF(d:Date,includeMilliseconds:Boolean=false):String
{
var date:Number = d.getUTCDate();
var month:Number = d.getUTCMonth();
var hours:Number = d.getUTCHours();
var minutes:Number = d.getUTCMinutes();
var seconds:Number = d.getUTCSeconds();
var milliseconds:Number = d.getUTCMilliseconds();
var sb:String = new String();
sb += d.getUTCFullYear();
sb += "-";
//thanks to "dom" who sent in a fix for the line below
if (month + 1 < 10)
{
sb += "0";
}
sb += month + 1;
sb += "-";
if (date < 10)
{
sb += "0";
}
sb += date;
sb += "T";
if (hours < 10)
{
sb += "0";
}
sb += hours;
sb += ":";
if (minutes < 10)
{
sb += "0";
}
sb += minutes;
sb += ":";
if (seconds < 10)
{
sb += "0";
}
sb += seconds;
if (includeMilliseconds && milliseconds > 0)
{
sb += ".";
sb += milliseconds;
}
sb += "-00:00";
return sb;
}
}
}