diff options
Diffstat (limited to 'includes/pager/ReverseChronologicalPager.php')
-rw-r--r-- | includes/pager/ReverseChronologicalPager.php | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/includes/pager/ReverseChronologicalPager.php b/includes/pager/ReverseChronologicalPager.php new file mode 100644 index 00000000..4f8c438d --- /dev/null +++ b/includes/pager/ReverseChronologicalPager.php @@ -0,0 +1,118 @@ +<?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" ); + } +} |