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Post revisions from mdawaffe. see #6775
git-svn-id: https://develop.svn.wordpress.org/trunk@7747 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Ryan Boren
@@ -2990,4 +2990,232 @@ function _get_post_ancestors(&$_post) {
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}
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}
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/* Post Revisions */
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/**
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* _wp_revision_fields() - determines which fields of posts are to be saved in revisions
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*
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* Does two things. If passed a postn *array*, it will return a post array ready to be
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* insterted into the posts table as a post revision.
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* Otherwise, returns an array whose keys are the post fields to be saved post revisions.
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*
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* @package WordPress
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* @subpackage Post Revisions
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* @since 2.6
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*
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* @param array $post optional a post array to be processed for insertion as a post revision
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* @return array post array ready to be inserted as a post revision or array of fields that can be versioned
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*/
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function _wp_revision_fields( $post = null ) {
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static $fields = false;
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if ( !$fields ) {
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// Allow these to be versioned
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$fields = array(
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'post_title' => __( 'Title' ),
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'post_author' => __( 'Author' ),
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'post_content' => __( 'Content' ),
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'post_excerpt' => __( 'Excerpt' ),
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);
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// WP uses these internally either in versioning or elsewhere - they cannot be versioned
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foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count' ) as $protect )
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unset( $fields[$protect] );
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}
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if ( !is_array($post) )
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return $fields;
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$return = array();
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foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field )
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$return[$field] = $post[$field];
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$return['post_parent'] = $post['ID'];
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$return['post_status'] = 'inherit';
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$return['post_type'] = 'revision';
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$return['post_name'] = "$post[ID]-revision";
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$return['post_date'] = $post['post_modified'];
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$return['post_date_gmt'] = $post['post_modified_gmt'];
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return $return;
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}
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/**
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* wp_save_revision() - Saves an already existing post as a post revision. Typically used immediately prior to post updates.
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*
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* @package WordPress
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* @subpackage Post Revisions
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* @since 2.6
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*
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* @uses _wp_put_revision()
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*
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* @param int $post_id The ID of the post to save as a revision
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* @return mixed null or 0 if error, new revision ID if success
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*/
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function wp_save_revision( $post_id ) {
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// TODO: rework autosave to use special type of post revision
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if ( @constant( 'DOING_AUTOSAVE' ) )
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return;
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if ( !$post = get_post( $post_id, ARRAY_A ) )
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return;
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// TODO: open this up for pages also
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if ( 'post' != $post->post_type )
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retun;
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return _wp_put_revision( $post );
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}
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/**
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* _wp_put_revision() - Inserts post data into the posts table as a post revision
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*
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* @package WordPress
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* @subpackage Post Revisions
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* @since 2.6
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*
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* @uses wp_insert_post()
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*
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* @param int|object|array $post post ID, post object OR post array
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* @return mixed null or 0 if error, new revision ID if success
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*/
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function _wp_put_revision( $post = null ) {
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if ( is_object($post) )
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$post = get_object_vars( $post );
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elseif ( !is_array($post) )
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$post = get_post($post, ARRAY_A);
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if ( !$post || empty($post['ID']) )
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return;
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if ( isset($post['post_type']) && 'revision' == $post_post['type'] )
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return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
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$post = _wp_revision_fields( $post );
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if ( $revision_id = wp_insert_post( $post ) )
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do_action( '_wp_put_revision', $revision_id );
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return $revision_id;
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}
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/**
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* wp_get_revision() - Gets a post revision
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*
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* @package WordPress
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* @subpackage Post Revisions
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* @since 2.6
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*
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* @uses get_post()
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*
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* @param int|object $post post ID or post object
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* @param $output optional OBJECT, ARRAY_A, or ARRAY_N
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* @param string $filter optional sanitation filter. @see sanitize_post()
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* @return mixed null if error or post object if success
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*/
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function &wp_get_revision(&$post, $output = OBJECT, $filter = 'raw') {
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$null = null;
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if ( !$revision = get_post( $post, OBJECT, $filter ) )
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return $revision;
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if ( 'revision' !== $revision->post_type )
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return $null;
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if ( $output == OBJECT ) {
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return $revision;
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} elseif ( $output == ARRAY_A ) {
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$_revision = get_object_vars($revision);
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return $_revision;
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} elseif ( $output == ARRAY_N ) {
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$_revision = array_values(get_object_vars($revision));
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return $_revision;
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}
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return $revision;
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}
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/**
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* wp_restore_revision() - Restores a post to the specified revision
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*
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* Can restore a past using all fields of the post revision, or only selected fields.
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*
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* @package WordPress
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* @subpackage Post Revisions
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* @since 2.6
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*
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* @uses wp_get_revision()
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* @uses wp_update_post()
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*
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* @param int|object $revision_id revision ID or revision object
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* @param array $fields optional What fields to restore from. Defaults to all.
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* @return mixed null if error, false if no fields to restore, (int) post ID if success
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*/
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function wp_restore_revision( $revision_id, $fields = null ) {
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if ( !$revision = wp_get_revision( $revision_id, ARRAY_A ) )
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return $revision;
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if ( !is_array( $fields ) )
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$fields = array_keys( _wp_revision_fields() );
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$update = array();
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foreach( array_intersect( array_keys( $revision ), $fields ) as $field )
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$update[$field] = $revision[$field];
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if ( !$update )
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return false;
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$update['ID'] = $revision['post_parent'];
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if ( $post_id = wp_update_post( $update ) )
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do_action( 'wp_restore_revision', $post_id, $revision['ID'] );
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return $post_id;
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}
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/**
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* wp_delete_revision() - Deletes a revision.
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*
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* Deletes the row from the posts table corresponding to the specified revision
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*
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* @package WordPress
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* @subpackage Post Revisions
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* @since 2.6
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*
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* @uses wp_get_revision()
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* @uses wp_delete_post()
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*
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* @param int|object $revision_id revision ID or revision object
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* @param array $fields optional What fields to restore from. Defaults to all.
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* @return mixed null if error, false if no fields to restore, (int) post ID if success
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*/
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function wp_delete_revision( $revision_id ) {
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if ( !$revision = wp_get_revision( $revision_id ) )
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return $revision;
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if ( $delete = wp_delete_post( $revision->ID ) )
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do_action( 'wp_delete_revision', $revision->ID, $revision );
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return $delete;
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}
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/**
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* wp_get_post_revisions() - Returns all revisions of specified post
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*
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* @package WordPress
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* @subpackage Post Revisions
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* @since 2.6
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*
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* @uses get_children()
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*
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* @param int|object $post_id post ID or post object
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* @return array empty if no revisions
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*/
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function wp_get_post_revisions( $post_id = 0 ) {
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if ( ( !$post = get_post( $post_id ) ) || empty( $post->ID ) )
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return array();
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if ( !$revisions = get_children( array( 'post_parent' => $post->ID, 'post_type' => 'revision' ) ) )
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return array();
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return $revisions;
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}
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?>
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