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