includes/LinksUpdate.php

   1 <?php
   2 # See deferred.doc
   3
   4 class LinksUpdate {
   5
   6         /* private */ var $mId, $mTitle;
   7
   8         function LinksUpdate( $id, $title )
   9         {
  10                 $this->mId = $id;
  11                 $this->mTitle = $title;
  12                 $this->mTitleEnc = wfStrencode( $title );
  13         }
  14
  15
  16         function doUpdate()
  17         {
  18                 global $wgUseBetterLinksUpdate, $wgLinkCache, $wgDBtransactions;
  19                 global $wgEnablePersistentLC;
  20
  21                 /* Update link tables with outgoing links from an updated article */
  22                 /* Relies on the 'link cache' to be filled out */
  23
  24                 $fname = "LinksUpdate::doUpdate";
  25                 wfProfileIn( $fname );
  26
  27                 $del = array();
  28                 $add = array();
  29
  30                 if( $wgDBtransactions ) {
  31                         $sql = "BEGIN";
  32                         wfQuery( $sql, DB_WRITE, $fname );
  33                 }
  34
  35                 #------------------------------------------------------------------------------
  36                 # Good links
  37
  38                 if ( $wgLinkCache->incrementalSetup( LINKCACHE_GOOD, $del, $add ) ) {
  39                         # Delete where necessary
  40                         if ( count( $del ) ) {
  41                                 $sql = "DELETE FROM links WHERE l_from='{$this->mTitleEnc}' AND l_to IN(".
  42                                         implode( ",", $del ) . ")";
  43                                 wfQuery( $sql, DB_WRITE, $fname );
  44                         }
  45                 } else {
  46                         # Delete everything
  47                         $sql = "DELETE FROM links WHERE l_from='{$this->mTitleEnc}'";
  48                         wfQuery( $sql, DB_WRITE, $fname );
  49
  50                         # Get the addition list
  51                         $add = $wgLinkCache->getGoodLinks();
  52                 }
  53
  54                 # Do the insertion
  55                 $sql = "";
  56                 if ( 0 != count( $add ) ) {
  57                         $sql = "INSERT INTO links (l_from,l_to) VALUES ";
  58                         $first = true;
  59                         foreach( $add as $lt => $lid ) {
  60
  61                                 if ( ! $first ) { $sql .= ","; }
  62                                 $first = false;
  63
  64                                 $sql .= "('{$this->mTitleEnc}',{$lid})";
  65                         }
  66                 }
  67                 if ( "" != $sql ) {
  68                         wfQuery( $sql, DB_WRITE, $fname );
  69                 }
  70
  71                 #------------------------------------------------------------------------------
  72                 # Bad links
  73
  74                 if ( $wgLinkCache->incrementalSetup( LINKCACHE_BAD, $del, $add ) ) {
  75                         # Delete where necessary
  76                         if ( count( $del ) ) {
  77                                 $sql = "DELETE FROM brokenlinks WHERE bl_from={$this->mId} AND bl_to IN('" .
  78                                         implode( "','", array_map( "wfStrencode", $del ) ) . "')";
  79                                 wfQuery( $sql, DB_WRITE, $fname );
  80                         }
  81                 } else {
  82                         # Delete all
  83                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$this->mId}";
  84                         wfQuery( $sql, DB_WRITE, $fname );
  85
  86                         # Get addition list
  87                         $add = $wgLinkCache->getBadLinks();
  88                 }
  89
  90                 # Do additions
  91                 $sql = "";
  92                 if ( 0 != count ( $add ) ) {
  93                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
  94                         $first = true;
  95                         foreach( $add as $blt ) {
  96                                 $blt = wfStrencode( $blt );
  97                                 if ( ! $first ) { $sql .= ","; }
  98                                 $first = false;
  99
 100                                 $sql .= "({$this->mId},'{$blt}')";
 101                         }
 102                 }
 103                 if ( "" != $sql ) {
 104                         wfQuery( $sql, DB_WRITE, $fname );
 105                 }
 106
 107                 #------------------------------------------------------------------------------
 108                 # Image links
 109                 $sql = "DELETE FROM imagelinks WHERE il_from='{$this->mTitleEnc}'";
 110                 wfQuery( $sql, DB_WRITE, $fname );
 111
 112                 # Get addition list
 113                 $add = $wgLinkCache->getImageLinks();
 114
 115                 # Do the insertion
 116                 $sql = "";
 117                 $image = Namespace::getImage();
 118                 if ( 0 != count ( $add ) ) {
 119                         $sql = "INSERT INTO imagelinks (il_from,il_to) VALUES ";
 120                         $first = true;
 121                         foreach( $add as $iname => $val ) {
 122                                 # FIXME: Change all this to avoid unnecessary duplication
 123                                 $nt = Title::makeTitle( $image, $iname );
 124                                 if( !$nt ) continue;
 125                                 $nt->invalidateCache();
 126
 127                                 $iname = wfStrencode( $iname );
 128                                 if ( ! $first ) { $sql .= ","; }
 129                                 $first = false;
 130
 131                                 $sql .= "('{$this->mTitleEnc}','{$iname}')";
 132                         }
 133                 }
 134                 if ( "" != $sql ) { wfQuery( $sql, DB_WRITE, $fname ); }
 135
 136                 $this->fixBrokenLinks();
 137
 138                 if( $wgDBtransactions ) {
 139                         $sql = "COMMIT";
 140                         wfQuery( $sql, DB_WRITE, $fname );
 141                 }
 142                 wfProfileOut( $fname );
 143         }
 144
 145         function fixBrokenLinks() {
 146                 /* Update any brokenlinks *to* this page */
 147                 /* Call for a newly created page, or just to make sure state is consistent */
 148
 149                 $sql = "SELECT bl_from FROM brokenlinks WHERE bl_to='{$this->mTitleEnc}'";
 150                 $res = wfQuery( $sql, DB_READ, $fname );
 151                 if ( 0 == wfNumRows( $res ) ) { return; }
 152
 153                 $sql = "INSERT INTO links (l_from,l_to) VALUES ";
 154                 $now = wfTimestampNow();
 155                 $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 156                 $first = true;
 157                 while ( $row = wfFetchObject( $res ) ) {
 158                         if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 159                         $first = false;
 160                         $nl = wfStrencode( Title::nameOf( $row->bl_from ) );
 161
 162                         $sql .= "('{$nl}',{$this->mId})";
 163                         $sql2 .= $row->bl_from;
 164                 }
 165                 $sql2 .= ")";
 166                 wfQuery( $sql, DB_WRITE, $fname );
 167                 wfQuery( $sql2, DB_WRITE, $fname );
 168
 169                 $sql = "DELETE FROM brokenlinks WHERE bl_to='{$this->mTitleEnc}'";
 170                 wfQuery( $sql, DB_WRITE, $fname );
 171         }
 172
 173 }
 174
 175 ?>