--- /dev/null
+<?php
+/**
+ * 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
+ */
+use Wikimedia\Timestamp\TimestampException;
+
+/**
+ * Efficient paging for SQL queries.
+ * IndexPager with a formatted navigation bar.
+ * @ingroup Pager
+ */
+abstract class ReverseChronologicalPager extends IndexPager {
+ public $mDefaultDirection = IndexPager::DIR_DESCENDING;
+ public $mYear;
+ public $mMonth;
+ public $mDay;
+
+ public function getNavigationBar() {
+ if ( !$this->isNavigationBarShown() ) {
+ return '';
+ }
+
+ if ( isset( $this->mNavigationBar ) ) {
+ return $this->mNavigationBar;
+ }
+
+ $linkTexts = [
+ '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;
+ }
+
+ /**
+ * Set and return the mOffset timestamp such that we can get all revisions with
+ * a timestamp up to the specified parameters.
+ *
+ * @param int $year Year up to which we want revisions
+ * @param int $month Month up to which we want revisions
+ * @param int $day [optional] Day up to which we want revisions. Default is end of month.
+ * @return string|null Timestamp or null if year and month are false/invalid
+ */
+ public function getDateCond( $year, $month, $day = -1 ) {
+ $year = (int)$year;
+ $month = (int)$month;
+ $day = (int)$day;
+
+ // Basic validity checks for year and month
+ // If year and month are invalid, don't update the mOffset
+ if ( $year <= 0 && ( $month <= 0 || $month >= 13 ) ) {
+ return null;
+ }
+
+ // Treat the given time in the wiki timezone and get a UTC timestamp for the database lookup
+ $timestamp = self::getOffsetDate( $year, $month, $day );
+ $timestamp->setTimezone( $this->getConfig()->get( 'Localtimezone' ) );
+
+ try {
+ $this->mYear = (int)$timestamp->format( 'Y' );
+ $this->mMonth = (int)$timestamp->format( 'm' );
+ $this->mDay = (int)$timestamp->format( 'd' );
+ $this->mOffset = $this->mDb->timestamp( $timestamp->getTimestamp() );
+ } catch ( TimestampException $e ) {
+ // Invalid user provided timestamp (T149257)
+ return null;
+ }
+
+ return $this->mOffset;
+ }
+
+ /**
+ * Core logic of determining the mOffset timestamp such that we can get all items with
+ * a timestamp up to the specified parameters. Given parameters for a day up to which to get
+ * items, this function finds the timestamp of the day just after the end of the range for use
+ * in an database strict inequality filter.
+ *
+ * This is separate from getDateCond so we can use this logic in other places, such as in
+ * RangeChronologicalPager, where this function is used to convert year/month/day filter options
+ * into a timestamp.
+ *
+ * @param int $year Year up to which we want revisions
+ * @param int $month Month up to which we want revisions
+ * @param int $day [optional] Day up to which we want revisions. Default is end of month.
+ * @return MWTimestamp Timestamp or null if year and month are false/invalid
+ */
+ public static function getOffsetDate( $year, $month, $day = -1 ) {
+ // Given an optional year, month, and day, 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
+ // year=2005, month=12, day=5 equals < 20051206
+ if ( $year <= 0 ) {
+ // 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 ( $month > $timestamp->format( 'n' ) ) {
+ $year--;
+ }
+ }
+
+ if ( $month && $month > 0 && $month < 13 ) {
+ // Day validity check after we have month and year checked
+ $day = checkdate( $month, $day, $year ) ? $day : false;
+
+ if ( $day && $day > 0 ) {
+ // If we have a day, we want up to the day immediately afterward
+ $day++;
+
+ // Did we overflow the current month?
+ if ( !checkdate( $month, $day, $year ) ) {
+ $day = 1;
+ $month++;
+ }
+ } else {
+ // If no day, assume beginning of next month
+ $day = 1;
+ $month++;
+ }
+
+ // Did we overflow the current year?
+ if ( $month > 12 ) {
+ $month = 1;
+ $year++;
+ }
+
+ } else {
+ // No month implies we want up to the end of the year in question
+ $month = 1;
+ $day = 1;
+ $year++;
+ }
+
+ // Y2K38 bug
+ if ( $year > 2032 ) {
+ $year = 2032;
+ }
+
+ $ymd = (int)sprintf( "%04d%02d%02d", $year, $month, $day );
+
+ if ( $ymd > 20320101 ) {
+ $ymd = 20320101;
+ }
+
+ return MWTimestamp::getInstance( "${ymd}000000" );
+ }
+}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff