includes/specials/SpecialLockdb.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7 /**
   8  * Constructor
   9  */
  10 function wfSpecialLockdb() {
  11         global $wgUser, $wgOut, $wgRequest;
  12
  13         if( !$wgUser->isAllowed( 'siteadmin' ) ) {
  14                 $wgOut->permissionRequired( 'siteadmin' );
  15                 return;
  16         }
  17
  18         # If the lock file isn't writable, we can do sweet bugger all
  19         global $wgReadOnlyFile;
  20         if( !is_writable( dirname( $wgReadOnlyFile ) ) ) {
  21                 DBLockForm::notWritable();
  22                 return;
  23         }
  24
  25         $action = $wgRequest->getVal( 'action' );
  26         $f = new DBLockForm();
  27
  28         if ( 'success' == $action ) {
  29                 $f->showSuccess();
  30         } else if ( 'submit' == $action && $wgRequest->wasPosted() &&
  31                 $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) ) ) {
  32                 $f->doSubmit();
  33         } else {
  34                 $f->showForm( '' );
  35         }
  36 }
  37
  38 /**
  39  * A form to make the database readonly (eg for maintenance purposes).
  40  * @ingroup SpecialPage
  41  */
  42 class DBLockForm {
  43         var $reason = '';
  44
  45         function DBLockForm() {
  46                 global $wgRequest;
  47                 $this->reason = $wgRequest->getText( 'wpLockReason' );
  48         }
  49
  50         function showForm( $err ) {
  51                 global $wgOut, $wgUser;
  52
  53                 $wgOut->setPagetitle( wfMsg( 'lockdb' ) );
  54                 $wgOut->addWikiMsg( 'lockdbtext' );
  55
  56                 if ( $err != "" ) {
  57                         $wgOut->setSubtitle( wfMsg( 'formerror' ) );
  58                         $wgOut->addHTML( '<p class="error">' . htmlspecialchars( $err ) . "</p>\n" );
  59                 }
  60                 $lc = htmlspecialchars( wfMsg( 'lockconfirm' ) );
  61                 $lb = htmlspecialchars( wfMsg( 'lockbtn' ) );
  62                 $elr = htmlspecialchars( wfMsg( 'enterlockreason' ) );
  63                 $titleObj = SpecialPage::getTitleFor( 'Lockdb' );
  64                 $action = $titleObj->escapeLocalURL( 'action=submit' );
  65                 $reason = htmlspecialchars( $this->reason );
  66                 $token = htmlspecialchars( $wgUser->editToken() );
  67
  68                 $wgOut->addHTML( <<<HTML
  69 <form id="lockdb" method="post" action="{$action}">
  70 {$elr}:
  71 <textarea name="wpLockReason" rows="10" cols="60" wrap="virtual">{$reason}</textarea>
  72 <table border="0">
  73         <tr>
  74                 <td align="right">
  75                         <input type="checkbox" name="wpLockConfirm" />
  76                 </td>
  77                 <td align="left">{$lc}</td>
  78         </tr>
  79         <tr>
  80                 <td>&nbsp;</td>
  81                 <td align="left">
  82                         <input type="submit" name="wpLock" value="{$lb}" />
  83                 </td>
  84         </tr>
  85 </table>
  86 <input type="hidden" name="wpEditToken" value="{$token}" />
  87 </form>
  88 HTML
  89 );
  90
  91         }
  92
  93         function doSubmit() {
  94                 global $wgOut, $wgUser, $wgLang, $wgRequest;
  95                 global $wgReadOnlyFile;
  96
  97                 if ( ! $wgRequest->getCheck( 'wpLockConfirm' ) ) {
  98                         $this->showForm( wfMsg( 'locknoconfirm' ) );
  99                         return;
 100                 }
 101                 $fp = @fopen( $wgReadOnlyFile, 'w' );
 102
 103                 if ( false === $fp ) {
 104                         # This used to show a file not found error, but the likeliest reason for fopen()
 105                         # to fail at this point is insufficient permission to write to the file...good old
 106                         # is_writable() is plain wrong in some cases, it seems...
 107                         self::notWritable();
 108                         return;
 109                 }
 110                 fwrite( $fp, $this->reason );
 111                 fwrite( $fp, "\n<p>(by " . $wgUser->getName() . " at " .
 112                   $wgLang->timeanddate( wfTimestampNow() ) . ")</p>\n" );
 113                 fclose( $fp );
 114
 115                 $titleObj = SpecialPage::getTitleFor( 'Lockdb' );
 116                 $wgOut->redirect( $titleObj->getFullURL( 'action=success' ) );
 117         }
 118
 119         function showSuccess() {
 120                 global $wgOut;
 121
 122                 $wgOut->setPagetitle( wfMsg( 'lockdb' ) );
 123                 $wgOut->setSubtitle( wfMsg( 'lockdbsuccesssub' ) );
 124                 $wgOut->addWikiMsg( 'lockdbsuccesstext' );
 125         }
 126
 127         public static function notWritable() {
 128                 global $wgOut;
 129                 $wgOut->showErrorPage( 'lockdb', 'lockfilenotwritable' );
 130         }
 131 }