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   1  <?php
   2  /**
   3   * Revisions administration panel.
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   */
   8  
   9  /** WordPress Administration Bootstrap */
  10  require_once ('./admin.php');
  11  
  12  wp_enqueue_script('list-revisions');
  13  
  14  wp_reset_vars(array('revision', 'left', 'right', 'action'));
  15  
  16  $revision_id = absint($revision);
  17  $left        = absint($left);
  18  $right       = absint($right);
  19  
  20  $redirect = 'edit.php';
  21  
  22  switch ( $action ) :
  23  case 'restore' :
  24      if ( !$revision = wp_get_post_revision( $revision_id ) )
  25          break;
  26      if ( !current_user_can( 'edit_post', $revision->post_parent ) )
  27          break;
  28      if ( !$post = get_post( $revision->post_parent ) )
  29          break;
  30  
  31      // Revisions disabled and we're not looking at an autosave
  32      if ( ( ! WP_POST_REVISIONS || !post_type_supports($post->post_type, 'revisions') ) && !wp_is_post_autosave( $revision ) ) {
  33          $redirect = 'edit.php?post_type=' . $post->post_type;
  34          break;
  35      }
  36  
  37      check_admin_referer( "restore-post_$post->ID|$revision->ID" );
  38  
  39      wp_restore_post_revision( $revision->ID );
  40      $redirect = add_query_arg( array( 'message' => 5, 'revision' => $revision->ID ), get_edit_post_link( $post->ID, 'url' ) );
  41      break;
  42  case 'diff' :
  43      if ( !$left_revision  = get_post( $left ) )
  44          break;
  45      if ( !$right_revision = get_post( $right ) )
  46          break;
  47  
  48      if ( !current_user_can( 'read_post', $left_revision->ID ) || !current_user_can( 'read_post', $right_revision->ID ) )
  49          break;
  50  
  51      // If we're comparing a revision to itself, redirect to the 'view' page for that revision or the edit page for that post
  52      if ( $left_revision->ID == $right_revision->ID ) {
  53          $redirect = get_edit_post_link( $left_revision->ID );
  54          include ( './js/revisions-js.php' );
  55          break;
  56      }
  57  
  58      // Don't allow reverse diffs?
  59      if ( strtotime($right_revision->post_modified_gmt) < strtotime($left_revision->post_modified_gmt) ) {
  60          $redirect = add_query_arg( array( 'left' => $right, 'right' => $left ) );
  61          break;
  62      }
  63  
  64      if ( $left_revision->ID == $right_revision->post_parent ) // right is a revision of left
  65          $post =& $left_revision;
  66      elseif ( $left_revision->post_parent == $right_revision->ID ) // left is a revision of right
  67          $post =& $right_revision;
  68      elseif ( $left_revision->post_parent == $right_revision->post_parent ) // both are revisions of common parent
  69          $post = get_post( $left_revision->post_parent );
  70      else
  71          break; // Don't diff two unrelated revisions
  72  
  73      if ( ! WP_POST_REVISIONS || !post_type_supports($post->post_type, 'revisions') ) { // Revisions disabled
  74          if (
  75              // we're not looking at an autosave
  76              ( !wp_is_post_autosave( $left_revision ) && !wp_is_post_autosave( $right_revision ) )
  77          ||
  78              // we're not comparing an autosave to the current post
  79              ( $post->ID !== $left_revision->ID && $post->ID !== $right_revision->ID )
  80          ) {
  81              $redirect = 'edit.php?post_type=' . $post->post_type;
  82              break;
  83          }
  84      }
  85  
  86      if (
  87          // They're the same
  88          $left_revision->ID == $right_revision->ID
  89      ||
  90          // Neither is a revision
  91          ( !wp_get_post_revision( $left_revision->ID ) && !wp_get_post_revision( $right_revision->ID ) )
  92      )
  93          break;
  94  
  95      $post_title = '<a href="' . get_edit_post_link() . '">' . get_the_title() . '</a>';
  96      $h2 = sprintf( __( 'Compare Revisions of &#8220;%1$s&#8221;' ), $post_title );
  97      $title = __( 'Revisions' );
  98  
  99      $left  = $left_revision->ID;
 100      $right = $right_revision->ID;
 101  
 102      $redirect = false;
 103      break;
 104  case 'view' :
 105  default :
 106      if ( !$revision = wp_get_post_revision( $revision_id ) )
 107          break;
 108      if ( !$post = get_post( $revision->post_parent ) )
 109          break;
 110  
 111      if ( !current_user_can( 'read_post', $revision->ID ) || !current_user_can( 'read_post', $post->ID ) )
 112          break;
 113  
 114      // Revisions disabled and we're not looking at an autosave
 115      if ( ( ! WP_POST_REVISIONS || !post_type_supports($post->post_type, 'revisions') ) && !wp_is_post_autosave( $revision ) ) {
 116          $redirect = 'edit.php?post_type=' . $post->post_type;
 117          break;
 118      }
 119  
 120      $post_title = '<a href="' . get_edit_post_link() . '">' . get_the_title() . '</a>';
 121      $revision_title = wp_post_revision_title( $revision, false );
 122      $h2 = sprintf( __( 'Revision for &#8220;%1$s&#8221; created on %2$s' ), $post_title, $revision_title );
 123      $title = __( 'Revisions' );
 124  
 125      // Sets up the diff radio buttons
 126      $left  = $revision->ID;
 127      $right = $post->ID;
 128  
 129      $redirect = false;
 130      break;
 131  endswitch;
 132  
 133  // Empty post_type means either malformed object found, or no valid parent was found.
 134  if ( !$redirect && empty($post->post_type) )
 135      $redirect = 'edit.php';
 136  
 137  if ( !empty($redirect) ) {
 138      wp_redirect( $redirect );
 139      exit;
 140  }
 141  
 142  // This is so that the correct "Edit" menu item is selected.
 143  if ( !empty($post->post_type) && 'post' != $post->post_type )
 144      $parent_file = $submenu_file = 'edit.php?post_type=' . $post->post_type;
 145  else
 146      $parent_file = $submenu_file = 'edit.php';
 147  
 148  require_once ( './admin-header.php' );
 149  
 150  ?>
 151  
 152  <div class="wrap">
 153  
 154  <h2 class="long-header"><?php echo $h2; ?></h2>
 155  
 156  <table class="form-table ie-fixed">
 157      <col class="th" />
 158  <?php if ( 'diff' == $action ) : ?>
 159  <tr id="revision">
 160      <th scope="row"></th>
 161      <th scope="col" class="th-full">
 162          <span class="alignleft"><?php printf( __('Older: %s'), wp_post_revision_title( $left_revision ) ); ?></span>
 163          <span class="alignright"><?php printf( __('Newer: %s'), wp_post_revision_title( $right_revision ) ); ?></span>
 164      </th>
 165  </tr>
 166  <?php endif;
 167  
 168  // use get_post_to_edit filters?
 169  $identical = true;
 170  foreach ( _wp_post_revision_fields() as $field => $field_title ) :
 171      if ( 'diff' == $action ) {
 172          $left_content = apply_filters( "_wp_post_revision_field_$field", $left_revision->$field, $field );
 173          $right_content = apply_filters( "_wp_post_revision_field_$field", $right_revision->$field, $field );
 174          if ( !$content = wp_text_diff( $left_content, $right_content ) )
 175              continue; // There is no difference between left and right
 176          $identical = false;
 177      } else {
 178          add_filter( "_wp_post_revision_field_$field", 'htmlspecialchars' );
 179          $content = apply_filters( "_wp_post_revision_field_$field", $revision->$field, $field );
 180      }
 181      ?>
 182  
 183      <tr id="revision-field-<?php echo $field; ?>">
 184          <th scope="row"><?php echo esc_html( $field_title ); ?></th>
 185          <td><div class="pre"><?php echo $content; ?></div></td>
 186      </tr>
 187  
 188      <?php
 189  
 190  endforeach;
 191  
 192  if ( 'diff' == $action && $identical ) :
 193  
 194      ?>
 195  
 196      <tr><td colspan="2"><div class="updated"><p><?php _e( 'These revisions are identical.' ); ?></p></div></td></tr>
 197  
 198      <?php
 199  
 200  endif;
 201  
 202  ?>
 203  
 204  </table>
 205  
 206  <br class="clear" />
 207  
 208  <h3><?php echo $title; ?></h3>
 209  
 210  <?php
 211  
 212  $args = array( 'format' => 'form-table', 'parent' => true, 'right' => $right, 'left' => $left );
 213  if ( ! WP_POST_REVISIONS || !post_type_supports($post->post_type, 'revisions') )
 214      $args['type'] = 'autosave';
 215  
 216  wp_list_post_revisions( $post, $args );
 217  
 218  ?>
 219  
 220  </div>
 221  
 222  <?php
 223  require_once ( './admin-footer.php' );