package fr.lteconsulting.hexa.client.common;
import java.util.Date;
import fr.lteconsulting.hexa.client.common.hexadatedisplayformatfactory.HexaDateDisplayFormatFactory.Format;
import fr.lteconsulting.hexa.client.common.text.DateTimeFormat;
import fr.lteconsulting.hexa.client.common.text.NumberFormat;
/*
* Because java.util.Date is not well managed in GWT,
* this class is aimed to replace it.
*/
public class HexaDate
{
DateTimeFormat ff;
public static int TIME_BEGIN = 732840;
public static int TIME_END = 758145;// 930000;
public static final String[] DayNames = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thirsday", "Friday", "Saturday" };
public static final String[] MonthNames = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
static public HexaDateDisplayFormat getDisplayFormat()
{
return s_displayFormat;
}
static public void setDisplayFormat( HexaDateDisplayFormat format )
{
s_displayFormat = format;
}
static private HexaDateDisplayFormat s_displayFormat = HexaDateDisplayFormatList.getFormat( Format.FORMAT_2 );// new
// HexaDateDisplayFormat2();
// static private DateTimeFormat dateFormat =
// DateTimeFormat.getFormat("yyyy-MM-dd");
private static NumberFormat yearFormat = NumberFormat.getFormat( "0000" );
private static NumberFormat monthFormat = NumberFormat.getFormat( "00" );
private static NumberFormat dayFormat = NumberFormat.getFormat( "00" );
private boolean fInvalid = false;
private int year = 0; // -1900
private int month = 0; // 0 to 11
private int date = 0; // 1 to 31
// needs contructor from :
// * String
// * Date
// * Integer (interop format = y*1000 + m*31 + d)
// Today's date
public HexaDate()
{
this( new Date() );
}
@SuppressWarnings( "deprecation" )
public HexaDate( Date d )
{
year = d.getYear();
month = d.getMonth();
date = d.getDate();
}
// string is in the YYYY-MM-DD format.
public HexaDate( String string )
{
set( string );
}
// day is the int encoded version
public HexaDate( int day )
{
if( day < TIME_BEGIN )
day = TIME_BEGIN;
else if( day > TIME_END )
day = TIME_END;
date = day % 31;
day -= date;
day /= 31;
date++;
month = day % 12;
day -= month;
day /= 12;
year = day - 1900;
}
public HexaDate( int year, int month, int date )
{
set( year, month, date );
}
public void set( String string )
{
fInvalid = false;
if( string.length() != 10 )
{
// GWT.log( "Invalid string " + string +
// " for HexaDate initialization" );
fInvalid = true;
return;
}
if( string.compareTo( "0000-00-00" ) == 0 )
{
// GWT.log( "Invalid string " + string +
// " for HexaDate initialization" );
fInvalid = true;
return;
}
try
{
year = Integer.parseInt( string.substring( 0, 4 ) ) - 1900;
month = Integer.parseInt( string.substring( 5, 7 ) ) - 1;
date = Integer.parseInt( string.substring( 8, 10 ) );
}
catch( Exception e )
{
fInvalid = true;
e.printStackTrace();
}
}
public static HexaDate now()
{
return new HexaDate();
}
public int compareTo( HexaDate date )
{
return toInt() - date.toInt();
}
public boolean equals( HexaDate other )
{
if( other.fInvalid == fInvalid && other.year == year && other.month == month && other.date == date )
return true;
return false;
}
// TODO : à essayer avec les années bissextiles
public int getIntervalDays( HexaDate other )
{
long interval = other.getJavaDate().getTime() - getJavaDate().getTime();
int res = (int) (interval / 86400000);
return res;
}
public HexaDate addDays( int nbDays )
{
// see public static Date OLDaddDays( Date start, int nbDays )
int day = this.date; // 1 - 31
int month = this.month; // 0 - 11
int year = this.year + 1900;
while( nbDays != 0 )
{
if( nbDays > 0 )
{
if( day + nbDays > GetDaysInMonth( year, month ) )
{
nbDays -= 1 + (GetDaysInMonth( year, month ) - day);
day = 1;
month++;
if( month > 11 )
{
month = 0;
year++;
}
}
else
{
day += nbDays;
nbDays = 0;
}
}
if( nbDays < 0 )
{
if( day + nbDays < 1 )
{
nbDays += day;
month--;
day = GetDaysInMonth( year, month );
if( month < 0 )
{
month = 11;
day = GetDaysInMonth( year, month );
year--;
}
}
else
{
day += nbDays;
nbDays = 0;
}
}
}
return new HexaDate( year - 1900, month, day );
}
@SuppressWarnings( "deprecation" )
public Date getJavaDate()
{
if( fInvalid )
return null;
return new Date( year, month, date );
}
public int getYear()
{
return year;
}
public int getMonth()
{
return month;
}
// position of the day in the month (from 1 to 31)
public int getDate()
{
return date;
}
public int getHumanYear()
{
return year + 1900;
}
public int getHumanMonth()
{
return month + 1;
}
public int getHumanDate()
{
return date;
}
public int getDay()
{
// Algorithme de Mike Keith
int y = year + 1900;
int m = month + 1;
int d = date;
int z = m < 3 ? y - 1 : y;
int r = m < 3 ? 0 : 2;
return (23 * m / 9 + d + 4 + y + z / 4 - z / 100 + z / 400 - r) % 7;
}
public boolean isValid()
{
return !fInvalid;
}
// encodes the date into an int
public int toInt()
{
int day = ((year + 1900) * 12 + month) * 31 + (date - 1);
if( day < TIME_BEGIN )
day = TIME_BEGIN;
else if( day > TIME_END )
day = TIME_END;
return day;
}
@Override
public String toString()
{
assert false : "Please do not use the HexaDate::toString, use getString() instead, it will minimize chances of human errors...";
return getString();
}
public String getDisplayString()
{
return s_displayFormat.format( fInvalid, year, month, date );
}
public String getString()
{
if( fInvalid )
return "";
// return "0000-00-00";
return yearFormat.format( year + 1900 ) + "-" + monthFormat.format( month + 1 ) + "-" + dayFormat.format( date );
}
public void set( int year, int month, int date )
{
this.year = year;
this.month = month;
this.date = date;
fInvalid = false;
}
public void setYear( int year )
{
this.year = year;
}
public void setMonth( int month )
{
this.month = month;
}
/**
* sets the day of the month
*
* @param date
*/
public void setDate( int date )
{
this.date = date;
}
public static int GetDaysInMonth( int year, int month )
{
switch( month )
{
case 1:
return (((year % 4) == 0 && (year % 100) != 0) || (year % 400) == 0) ? 29 : 28;
case 3:
case 5:
case 8:
case 10:
return 30;
default:
return 31;
}
}
}