Difference between revisions of "API:EPrints/Time"

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<!-- Pod2Wiki=_preamble_
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This page has been automatically generated from the EPrints 3.2 source. Any wiki changes made between the 'Pod2Wiki=*' and 'Edit below this comment' comments will be lost.
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-->{{API}}{{Pod2Wiki}}{{API:Source|file=perl_lib/EPrints/Time.pm|package_name=EPrints::Time}}[[Category:API|TIME]][[Category:API:EPrints/Time|TIME]]<div><!-- Edit below this comment -->
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<!-- Pod2Wiki=_private_ --><!-- Pod2Wiki=head_name -->
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==NAME==
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'''EPrints::Time''' - Time and Date-related functions
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_synopsis -->
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==SYNOPSIS==
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<source lang="perl">($year) = EPrints::Time::utc_datetime()
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# 2010
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($year,$month) = EPrints::Time::local_datetime()
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# 2010, 6
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EPrints::Time::iso_datetime();
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# 2008-05-15T14:40:24Z
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EPrints::Time::iso_date()
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# 2010-06-23
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EPrints::Time::month_label( $repo, 11 )
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# returns "November"
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EPrints::Time::short_month_label( $repo, 11 )
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# returns "Nov"
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EPrints::Time::render_date( $repo, "2001-01-12T00:00:00Z" )
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# returns XML containing 12 January 2001 00:00
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EPrints::Time::render_short_date( $repo, "2001-01-12T00:00:00Z" )
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# returns XML containing 12 Jan 2001 00:00</source>
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_description -->
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==DESCRIPTION==
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This package contains functions related to time/date functionality.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_formats_used_in_eprints -->
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==FORMATS USED IN EPRINTS==
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_internal_format -->
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===Internal format===
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Time zone: UTC (database), server local time (embargoes)
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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"
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 +
These are used in the database and when setting and getting values. They can contain any fractional part of a date time.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_iso_8601_style_date_times -->
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===ISO 8601-style date/times===
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Time zone: UTC
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Format: YYYY-MM-DD or YYYY-MM-DDThh:mm:ssZ
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These are primarily used in XML output where times that conform to the standard XSD date/time are required.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_epoch_time -->
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===Epoch time===
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Time zone: UTC
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Format: integer
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Time in seconds since system epoch. Used in the login tickets table and when performing date calculations.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_methods -->
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==METHODS==
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_parsing -->
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===Parsing===
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@t = split_value( $value )
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Splits internal or ISO format $value into years, months, days, hours, minutes, seconds.
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$time = datetime_local( @t )
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Returns local time @t as the number of seconds since epoch, where @t is years, months etc.
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$time = datetime_utc( @t )
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Returns UTC time @t as the number of seconds since epoch, where @t is years, months etc.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_formatting -->
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===Formatting===
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$datetime = EPrints::Time::join_value( @t )
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Return a time @t in internal format.
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Returns undef if no parts are defined.
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($year,$mon,$day,$hour,$min,$sec) = EPrints::Time::local_datetime( [ $seconds ] )
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Returns the local date-time as an array, see {{API:PodLink|file=perlfunc|package_name=perlfunc|section=localtime|text=perlfunc/localtime}}.
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$seconds is seconds since epoch or now if not given.
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($year,$mon,$day,$hour,$min,$sec) = EPrints::Time::utc_datetime( [ $seconds ] )
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Returns the UTC date-time as an array, see {{API:PodLink|file=perlfunc|package_name=perlfunc|section=gmtime|text=perlfunc/gmtime}}.
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$seconds is seconds since epoch or now if not given.
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$date = EPrints::Time::iso_date( [ $seconds ] )
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Return a UTC date of the form YYYY-MM-DD.
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$seconds is seconds since epoch or now if not given.
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$datetime = EPrints::Time::iso_datetime( [ $seconds ] );
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Return a UTC date-time of the form YYYY-MM-DDTHH:MM:SSZ
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$seconds is seconds since epoch or now if not given.
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$datetime = EPrints::Time::rfc822_datetime( [ $seconds ] )
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Return the local date-time in RFC 822 format (used by e.g. RSS).
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$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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$timestamp = EPrints::Time::human_delay( $hours );
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Returns a human readable amount of time.
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$hours the number of hours representing the time you want to be human readable.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_phrases -->
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===Phrases===
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$label = EPrints::Time::month_label( $repo, $monthid )
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Return a UTF-8 string describing the month, in the current lanugage.
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$monthid is an integer from 1 to 12.
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$label = EPrints::Time::short_month_label( $repo, $monthid )
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Return a UTF-8 string of a short representation in month, in the current lanugage.
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$monthid is an integer from 1 to 12.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=head_rendering -->
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===Rendering===
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$xhtml = EPrints::Time::render_date( $repo, $value )
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Renders a [[API:EPrints/MetaField/Date|EPrints::MetaField::Date]] or [[API:EPrints/MetaField/Time|EPrints::MetaField::Time]] value in a human-friendly form in the current locale's time zone.
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Month names are taken from the current repository language.
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E.g.
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<pre>  5 June 2010 10:35:12 +02:00
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  12 December 1912 # no time
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  1954 # no month/day</pre>
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$xhtml = EPrints::Time::render_short_date( $repo, $value )
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Render a shorter form of [[API:EPrints/Time#render_date|render_date]].
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E.g.
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<pre>  05 Jun 2010 10:35:12
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  12 Dec 1912 # no time
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  1954 # no month/day</pre>
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<!-- Pod2Wiki=head_copyright -->
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==COPYRIGHT==
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: Copyright 2000-2011 University of Southampton.
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: This file is part of EPrints http://www.eprints.org/.
 +
 
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: 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/.
 +
 
 +
<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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<!-- Pod2Wiki=_postamble_ -->
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<!-- Edit below this comment -->

Latest revision as of 09:56, 22 January 2013

EPrints 3 Reference: Directory Structure - Metadata Fields - Repository Configuration - XML Config Files - XML Export Format - EPrints data structure - Core API - Data Objects

API: Core API

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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