3 * Efficient paging for SQL queries.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
25 * IndexPager with a formatted navigation bar
28 abstract class ReverseChronologicalPager
extends IndexPager
{
29 public $mDefaultDirection = IndexPager
::DIR_DESCENDING
;
34 function getNavigationBar() {
35 if ( !$this->isNavigationBarShown() ) {
39 if ( isset( $this->mNavigationBar
) ) {
40 return $this->mNavigationBar
;
44 'prev' => $this->msg( 'pager-newer-n' )->numParams( $this->mLimit
)->escaped(),
45 'next' => $this->msg( 'pager-older-n' )->numParams( $this->mLimit
)->escaped(),
46 'first' => $this->msg( 'histlast' )->escaped(),
47 'last' => $this->msg( 'histfirst' )->escaped()
50 $pagingLinks = $this->getPagingLinks( $linkTexts );
51 $limitLinks = $this->getLimitLinks();
52 $limits = $this->getLanguage()->pipeList( $limitLinks );
53 $firstLastLinks = $this->msg( 'parentheses' )->rawParams( "{$pagingLinks['first']}" .
54 $this->msg( 'pipe-separator' )->escaped() .
55 "{$pagingLinks['last']}" )->escaped();
57 $this->mNavigationBar
= $firstLastLinks . ' ' .
58 $this->msg( 'viewprevnext' )->rawParams(
59 $pagingLinks['prev'], $pagingLinks['next'], $limits )->escaped();
61 return $this->mNavigationBar
;
65 * Set and return the mOffset timestamp such that we can get all revisions with
66 * a timestamp up to the specified parameters.
67 * @param int $year Year up to which we want revisions
68 * @param int $month Month up to which we want revisions
69 * @param int $day [optional] Day up to which we want revisions. Default is end of month.
70 * @return string|null Timestamp or null if year and month are false/invalid
72 function getDateCond( $year, $month, $day = -1 ) {
73 $year = intval( $year );
74 $month = intval( $month );
75 $day = intval( $day );
77 // Basic validity checks for year and month
78 $this->mYear
= $year > 0 ?
$year : false;
79 $this->mMonth
= ( $month > 0 && $month < 13 ) ?
$month : false;
81 // If year and month are false, don't update the mOffset
82 if ( !$this->mYear
&& !$this->mMonth
) {
86 // Given an optional year, month, and day, we need to generate a timestamp
87 // to use as "WHERE rev_timestamp <= result"
88 // Examples: year = 2006 equals < 20070101 (+000000)
89 // year=2005, month=1 equals < 20050201
90 // year=2005, month=12 equals < 20060101
91 // year=2005, month=12, day=5 equals < 20051206
95 // If no year given, assume the current one
96 $timestamp = MWTimestamp
::getInstance();
97 $year = $timestamp->format( 'Y' );
98 // If this month hasn't happened yet this year, go back to last year's month
99 if ( $this->mMonth
> $timestamp->format( 'n' ) ) {
104 if ( $this->mMonth
) {
105 $month = $this->mMonth
;
107 // Day validity check after we have month and year checked
108 $this->mDay
= checkdate( $month, $day, $year ) ?
$day : false;
111 // If we have a day, we want up to the day immediately afterward
112 $day = $this->mDay +
1;
114 // Did we overflow the current month?
115 if ( !checkdate( $month, $day, $year ) ) {
120 // If no day, assume beginning of next month
125 // Did we overflow the current year?
132 // No month implies we want up to the end of the year in question
139 if ( $year > 2032 ) {
143 $ymd = (int)sprintf( "%04d%02d%02d", $year, $month, $day );
145 if ( $ymd > 20320101 ) {
149 // Treat the given time in the wiki timezone and get a UTC timestamp for the database lookup
150 $timestamp = MWTimestamp
::getInstance( "${ymd}000000" );
151 $timestamp->setTimezone( $this->getConfig()->get( 'Localtimezone' ) );
154 $this->mOffset
= $this->mDb
->timestamp( $timestamp->getTimestamp() );
155 } catch ( TimestampException
$e ) {
156 // Invalid user provided timestamp (T149257)
160 return $this->mOffset
;