includes/TitleArrayFromResult.php

   1 <?php
   2 /**
   3  * Class to walk into a list of Title objects.
   4  *
   5  * Note: this entire file is a byte-for-byte copy of UserArrayFromResult.php
   6  * with s/User/Title/.  If anyone can figure out how to do this nicely
   7  * with inheritance or something, please do so.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 use Wikimedia\Rdbms\IResultWrapper;
  28
  29 class TitleArrayFromResult extends TitleArray implements Countable {
  30         /** @var IResultWrapper */
  31         public $res;
  32
  33         public $key;
  34
  35         public $current;
  36
  37         function __construct( $res ) {
  38                 $this->res = $res;
  39                 $this->key = 0;
  40                 $this->setCurrent( $this->res->current() );
  41         }
  42
  43         /**
  44          * @param bool|IResultWrapper $row
  45          * @return void
  46          */
  47         protected function setCurrent( $row ) {
  48                 if ( $row === false ) {
  49                         $this->current = false;
  50                 } else {
  51                         $this->current = Title::newFromRow( $row );
  52                 }
  53         }
  54
  55         /**
  56          * @return int
  57          */
  58         public function count() {
  59                 return $this->res->numRows();
  60         }
  61
  62         function current() {
  63                 return $this->current;
  64         }
  65
  66         function key() {
  67                 return $this->key;
  68         }
  69
  70         function next() {
  71                 $row = $this->res->next();
  72                 $this->setCurrent( $row );
  73                 $this->key++;
  74         }
  75
  76         function rewind() {
  77                 $this->res->rewind();
  78                 $this->key = 0;
  79                 $this->setCurrent( $this->res->current() );
  80         }
  81
  82         /**
  83          * @return bool
  84          */
  85         function valid() {
  86                 return $this->current !== false;
  87         }
  88 }