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'''EPrints::Time''' - Time and Date-related functions  
'''EPrints::Time''' - Time and Date-related functions  


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==SYNOPSIS==
==SYNOPSIS==
  EPrints::Time::render_date( $handle, "2001-01-12T00:00:00Z" )  
<source lang="perl">($year) = EPrints::Time::utc_datetime()
  # returns XML containing 12 January 2001 00:00
# 2010
 
 
  EPrints::Time::render_short_date( $handle, "2001-01-12T00:00:00Z" )
($year,$month) = EPrints::Time::local_datetime()
  # returns XML containing 12 Jan 2001 00:00
# 2010, 6
 
 
  EPrints::Time::get_iso_timestamp( );
EPrints::Time::iso_datetime();
  # returns NOW in the form YYYY-MM-DDTHH:MM:SSZ
# 2008-05-15T14:40:24Z
 
 
  EPrints::Time::human_delay( 28 );
EPrints::Time::iso_date()
  # returns "1 day"
# 2010-06-23
 
 
  EPrints::Time::get_month_label( $handle, 11 )  
EPrints::Time::month_label( $repo, 11 )  
  # returns November
# returns "November"
 
 
  EPrints::Time::get_month_label_short( $handle, 11 )  
EPrints::Time::short_month_label( $repo, 11 )  
  # returns Nov
# returns "Nov"
 
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
EPrints::Time::render_date( $repo, "2001-01-12T00:00:00Z" )  
<span style='display:none'>User Comments</span>
# returns XML containing 12 January 2001 00:00
 
EPrints::Time::render_short_date( $repo, "2001-01-12T00:00:00Z" )
# returns XML containing 12 Jan 2001 00:00</source>
 
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==DESCRIPTION==
==DESCRIPTION==
This package contains functions related to time/date functionality.  
This package contains functions related to time/date functionality.  


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==FORMATS USED IN EPRINTS==
===$xhtml = EPrints::Time::render_date( $handle, $datevalue )===
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Render the given date or date and time as a chunk of XHTML.
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===Internal format===
Time zone: UTC (database), server local time (embargoes)


$datevalue is given in a UTC timestamp of the form YYYY-MM-DDTHH:MM:SSZ but it will be rendered in the local offset.
Format: YYYY or YYYY-MM or YYYY-MM-DD or "YYYY-MM-DD hh" or "YYYY-MM-DD hh:mm" or "YYYY-MM-DD hh:mm:ss"


e.g EPrints::Time::render_date( $handle, "2001-01-12T00:00:00Z" ) #returns XML containing 12 January 2001 00:00
These are used in the database and when setting and getting values. They can contain any fractional part of a date time.


<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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===ISO 8601-style date/times===
===$xhtml = EPrints::Time::render_short_date( $handle, $datevalue )===
Time zone: UTC


Renders a short version of the given date or date and time as a chunk of XHTML.
Format: YYYY-MM-DD or YYYY-MM-DDThh:mm:ssZ


$datevalue is given in UTC timestamp of the form YYYY-MM-DDTHH:MM:SSZ but it will be rendered in the local offset.
These are primarily used in XML output where times that conform to the standard XSD date/time are required.


e.g EPrints::Time::render_short_date( $handle, "2001-01-12T00:00:00Z" ) #returns XML containing 12 Jan 2001 00:00
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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===Epoch time===
===$xhtml = EPrints::Time::datestring_to_timet( $handle, $datevalue )===
Time zone: UTC


Returns an interger number of seconds since 1970-01-01:00:00
Format: integer


$datevalue - in the format YYYY-MM-DDTHH:MM:SSZ
Time in seconds since system epoch. Used in the login tickets table and when performing date calculations.


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==METHODS==
===$xhtml = EPrints::Time::gmt_off()===
 
Render the current time offset in seconds. This just diffs gmtime and localtime.
 
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===Parsing===
===$label = EPrints::Time::get_month_label( $handle, $monthid )===
@t = split_value( $value )
Splits internal or ISO format $value into years, months, days, hours, minutes, seconds.


Return a UTF-8 string describing the month, in the current lanugage.
$time = datetime_local( @t )
 
Returns local time @t as the number of seconds since epoch, where @t is years, months etc.
$monthid is an integer from 1 to 12.


e.g EPrints::Time::get_month_label( $handle, 11 ) # returns November
$time = datetime_utc( @t )
Returns UTC time @t as the number of seconds since epoch, where @t is years, months etc.


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===Formatting===
===$label = EPrints::Time::get_month_label_short( $handle, $monthid )===
$datetime = EPrints::Time::join_value( @t )
Return a time @t in internal format.
 
Returns undef if no parts are defined.


Return a UTF-8 string of a short representation in month, in the current lanugage.
  ($year,$mon,$day,$hour,$min,$sec) = EPrints::Time::local_datetime( [ $seconds ] )
Returns the local date-time as an array, see {{API:PodLink|file=perlfunc|package_name=perlfunc|section=localtime|text=perlfunc/localtime}}.


$monthid is an integer from 1 to 12.
$seconds is seconds since epoch or now if not given.


e.g EPrints::Time::get_month_label_short( $handle, 11 ) # returns Nov
($year,$mon,$day,$hour,$min,$sec) = EPrints::Time::utc_datetime( [ $seconds ] )
Returns the UTC date-time as an array, see {{API:PodLink|file=perlfunc|package_name=perlfunc|section=gmtime|text=perlfunc/gmtime}}.


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$seconds is seconds since epoch or now if not given.
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$date = EPrints::Time::iso_date( [ $seconds ] )
Return a UTC date of the form YYYY-MM-DD.


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$seconds is seconds since epoch or now if not given.
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===($year,$month,$day) = EPrints::Time::get_date_array( [$time] )===


Static method that returns the given time (in UNIX time, seconds since 1.1.79) in an array.
$datetime = EPrints::Time::iso_datetime( [ $seconds ] );
Return a UTC date-time of the form YYYY-MM-DDTHH:MM:SSZ


This is the local date not the UTC date.
$seconds is seconds since epoch or now if not given.


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$datetime = EPrints::Time::rfc822_datetime( [ $seconds ] )
<span style='display:none'>User Comments</span>
Return the local date-time in RFC 822 format (used by e.g. RSS).
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$seconds is seconds since epoch or now if not given.


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$timestamp = EPrints::Time::human_time( [$time] )
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Return a string describing the current local date and time in the current locale's format, see {{API:PodLink|file=perlfunc|package_name=perlfunc|section=localtime|text=perlfunc/localtime}}.
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===$datestamp = EPrints::Time::get_iso_date( [$time] )===


Method that returns the given time (in UNIX time, seconds since 1.1.79) in the format used by EPrints and MySQL (YYYY-MM-DD).
  $timestamp = EPrints::Time::human_delay( $hours );
Returns a human readable amount of time.  


This is the localtime date, not UTC.
$hours the number of hours representing the time you want to be human readable.


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===Phrases===
===$timestamp = EPrints::Time::human_time( [$time] )===
$label = EPrints::Time::month_label( $repo, $monthid )
Return a UTF-8 string describing the month, in the current lanugage.
 
$monthid is an integer from 1 to 12.


Return a string describing the current local date and time in the current locale's format (see Perl's 'localtime).
$label = EPrints::Time::short_month_label( $repo, $monthid )
Return a UTF-8 string of a short representation in month, in the current lanugage.
 
$monthid is an integer from 1 to 12.


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===Rendering===
===$timestamp = EPrints::Time::get_iso_timestamp( [$time] );===
$xhtml = EPrints::Time::render_date( $repo, $value )
Renders a [[API:EPrints/MetaField/Date|EPrints::MetaField::Date]] or [[API:EPrints/MetaField/Time|EPrints::MetaField::Time]] value in a human-friendly form in the current locale's time zone.


Return a UTC timestamp of the form YYYY-MM-DDTHH:MM:SSZ
Month names are taken from the current repository language.


e.g. 2005-02-12T09:23:33Z
E.g.


$time in seconds from 1970. If not defined then assume current time.
<pre>  5 June 2010 10:35:12 +02:00
  12 December 1912 # no time
  1954 # no month/day</pre>


<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
$xhtml = EPrints::Time::render_short_date( $repo, $value )
<span style='display:none'>User Comments</span>
Render a shorter form of [[API:EPrints/Time#render_date|render_date]].
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E.g.


<pre>  05 Jun 2010 10:35:12
  12 Dec 1912 # no time
  1954 # no month/day</pre>


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==COPYRIGHT==
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: Copyright 2000-2011 University of Southampton.
===$timestamp = EPrints::Time::human_delay( $hours );===


Returns a human readable amount of time.  
: This file is part of EPrints http://www.eprints.org/.


$hours the number of hours representing the time you want to be human readable.
: EPrints is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.


e.g. EPrints::Time::human_delay( 28 ); # returns "1 day"
: EPrints is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.


e.g. EPrints::Time::human_delay( 400 ); # returns "2 weeks"
: You should have received a copy of the GNU Lesser General Public License along with EPrints.  If not, see http://www.gnu.org/licenses/.


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Latest revision as of 09:56, 22 January 2013

Latest Source Code (3.4, 3.3) | Revision Log | Before editing this page please read Pod2Wiki


NAME

EPrints::Time - Time and Date-related functions


SYNOPSIS

($year) = EPrints::Time::utc_datetime()
# 2010

($year,$month) = EPrints::Time::local_datetime()
# 2010, 6

EPrints::Time::iso_datetime(); 
# 2008-05-15T14:40:24Z

EPrints::Time::iso_date()
# 2010-06-23

EPrints::Time::month_label( $repo, 11 ) 
# returns "November"

EPrints::Time::short_month_label( $repo, 11 ) 
# returns "Nov"

EPrints::Time::render_date( $repo, "2001-01-12T00:00:00Z" ) 
# returns XML containing 12 January 2001 00:00

EPrints::Time::render_short_date( $repo, "2001-01-12T00:00:00Z" ) 
# returns XML containing 12 Jan 2001 00:00


DESCRIPTION

This package contains functions related to time/date functionality.


FORMATS USED IN EPRINTS

Internal format

Time zone: UTC (database), server local time (embargoes)

Format: YYYY or YYYY-MM or YYYY-MM-DD or "YYYY-MM-DD hh" or "YYYY-MM-DD hh:mm" or "YYYY-MM-DD hh:mm:ss"

These are used in the database and when setting and getting values. They can contain any fractional part of a date time.


ISO 8601-style date/times

Time zone: UTC

Format: YYYY-MM-DD or YYYY-MM-DDThh:mm:ssZ

These are primarily used in XML output where times that conform to the standard XSD date/time are required.


Epoch time

Time zone: UTC

Format: integer

Time in seconds since system epoch. Used in the login tickets table and when performing date calculations.


METHODS

Parsing

@t = split_value( $value )

Splits internal or ISO format $value into years, months, days, hours, minutes, seconds. 

$time = datetime_local( @t )

Returns local time @t as the number of seconds since epoch, where @t is years, months etc. 

$time = datetime_utc( @t )

Returns UTC time @t as the number of seconds since epoch, where @t is years, months etc.


Formatting

$datetime = EPrints::Time::join_value( @t )

Return a time @t in internal format.

Returns undef if no parts are defined. 

($year,$mon,$day,$hour,$min,$sec) = EPrints::Time::local_datetime( [ $seconds ] )

Returns the local date-time as an array, see perlfunc/localtime.

$seconds is seconds since epoch or now if not given. 

($year,$mon,$day,$hour,$min,$sec) = EPrints::Time::utc_datetime( [ $seconds ] )

Returns the UTC date-time as an array, see perlfunc/gmtime.

$seconds is seconds since epoch or now if not given. 

$date = EPrints::Time::iso_date( [ $seconds ] )

Return a UTC date of the form YYYY-MM-DD.

$seconds is seconds since epoch or now if not given. 

$datetime = EPrints::Time::iso_datetime( [ $seconds ] );

Return a UTC date-time of the form YYYY-MM-DDTHH:MM:SSZ

$seconds is seconds since epoch or now if not given. 

$datetime = EPrints::Time::rfc822_datetime( [ $seconds ] )

Return the local date-time in RFC 822 format (used by e.g. RSS).

$seconds is seconds since epoch or now if not given. 

$timestamp = EPrints::Time::human_time( [$time] )

Return a string describing the current local date and time in the current locale's format, see perlfunc/localtime. 

$timestamp = EPrints::Time::human_delay( $hours );

Returns a human readable amount of time.

$hours the number of hours representing the time you want to be human readable.


Phrases

$label = EPrints::Time::month_label( $repo, $monthid )

Return a UTF-8 string describing the month, in the current lanugage.

$monthid is an integer from 1 to 12. 

$label = EPrints::Time::short_month_label( $repo, $monthid )

Return a UTF-8 string of a short representation in month, in the current lanugage.

$monthid is an integer from 1 to 12.


Rendering

$xhtml = EPrints::Time::render_date( $repo, $value )

Renders a EPrints::MetaField::Date or EPrints::MetaField::Time value in a human-friendly form in the current locale's time zone.

Month names are taken from the current repository language.

E.g. 

  5 June 2010 10:35:12 +02:00
  12 December 1912 # no time
  1954 # no month/day
$xhtml = EPrints::Time::render_short_date( $repo, $value )

Render a shorter form of render_date.

E.g. 

  05 Jun 2010 10:35:12
  12 Dec 1912 # no time
  1954 # no month/day

COPYRIGHT

Copyright 2000-2011 University of Southampton.
This file is part of EPrints http://www.eprints.org/.
EPrints is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
EPrints is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with EPrints. If not, see http://www.gnu.org/licenses/.



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