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<?php
/**
* Efficient paging for SQL queries.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Pager
*/
/**
* IndexPager with a formatted navigation bar
* @ingroup Pager
*/
abstract class ReverseChronologicalPager extends IndexPager {
public $mDefaultDirection = IndexPager::DIR_DESCENDING;
public $mYear;
public $mMonth;
function getNavigationBar() {
if ( !$this->isNavigationBarShown() ) {
return '';
}
if ( isset( $this->mNavigationBar ) ) {
return $this->mNavigationBar;
}
$linkTexts = array(
'prev' => $this->msg( 'pager-newer-n' )->numParams( $this->mLimit )->escaped(),
'next' => $this->msg( 'pager-older-n' )->numParams( $this->mLimit )->escaped(),
'first' => $this->msg( 'histlast' )->escaped(),
'last' => $this->msg( 'histfirst' )->escaped()
);
$pagingLinks = $this->getPagingLinks( $linkTexts );
$limitLinks = $this->getLimitLinks();
$limits = $this->getLanguage()->pipeList( $limitLinks );
$firstLastLinks = $this->msg( 'parentheses' )->rawParams( "{$pagingLinks['first']}" .
$this->msg( 'pipe-separator' )->escaped() .
"{$pagingLinks['last']}" )->escaped();
$this->mNavigationBar = $firstLastLinks . ' ' .
$this->msg( 'viewprevnext' )->rawParams(
$pagingLinks['prev'], $pagingLinks['next'], $limits )->escaped();
return $this->mNavigationBar;
}
function getDateCond( $year, $month ) {
$year = intval( $year );
$month = intval( $month );
// Basic validity checks
$this->mYear = $year > 0 ? $year : false;
$this->mMonth = ( $month > 0 && $month < 13 ) ? $month : false;
// Given an optional year and month, we need to generate a timestamp
// to use as "WHERE rev_timestamp <= result"
// Examples: year = 2006 equals < 20070101 (+000000)
// year=2005, month=1 equals < 20050201
// year=2005, month=12 equals < 20060101
if ( !$this->mYear && !$this->mMonth ) {
return;
}
if ( $this->mYear ) {
$year = $this->mYear;
} else {
// If no year given, assume the current one
$timestamp = MWTimestamp::getInstance();
$year = $timestamp->format( 'Y' );
// If this month hasn't happened yet this year, go back to last year's month
if ( $this->mMonth > $timestamp->format( 'n' ) ) {
$year--;
}
}
if ( $this->mMonth ) {
$month = $this->mMonth + 1;
// For December, we want January 1 of the next year
if ( $month > 12 ) {
$month = 1;
$year++;
}
} else {
// No month implies we want up to the end of the year in question
$month = 1;
$year++;
}
// Y2K38 bug
if ( $year > 2032 ) {
$year = 2032;
}
$ymd = (int)sprintf( "%04d%02d01", $year, $month );
if ( $ymd > 20320101 ) {
$ymd = 20320101;
}
$this->mOffset = $this->mDb->timestamp( "${ymd}000000" );
}
}
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