/**
* Ajax handler for getting revision diffs.
*
* @since 3.6.0
*/
function wp_ajax_get_revision_diffs()
{
require ABSPATH . 'wp-admin/includes/revision.php';
if (!($post = get_post((int) $_REQUEST['post_id']))) {
wp_send_json_error();
}
if (!current_user_can('read_post', $post->ID)) {
wp_send_json_error();
}
// Really just pre-loading the cache here.
if (!($revisions = wp_get_post_revisions($post->ID, array('check_enabled' => false)))) {
wp_send_json_error();
}
$return = array();
@set_time_limit(0);
foreach ($_REQUEST['compare'] as $compare_key) {
list($compare_from, $compare_to) = explode(':', $compare_key);
// from:to
$return[] = array('id' => $compare_key, 'fields' => wp_get_revision_ui_diff($post, $compare_from, $compare_to));
}
wp_send_json_success($return);
}
/**
* Prepare revisions for JavaScript.
*
* @since 3.6.0
*
* @param object $post The post object.
* @param int $selected_revision_id The selected revision id.
* @param int $from (optional) The revision id to compare from.
*
* @return array An associative array of revision data and related settings.
*/
function wp_prepare_revisions_for_js($post, $selected_revision_id, $from = null)
{
$post = get_post($post);
$revisions = $authors = array();
$now_gmt = time();
$revisions = wp_get_post_revisions($post->ID, array('order' => 'ASC', 'check_enabled' => false));
// If revisions are disabled, we only want autosaves and the current post.
if (!wp_revisions_enabled($post)) {
foreach ($revisions as $revision_id => $revision) {
if (!wp_is_post_autosave($revision)) {
unset($revisions[$revision_id]);
}
}
$revisions = array($post->ID => $post) + $revisions;
}
$show_avatars = get_option('show_avatars');
cache_users(wp_list_pluck($revisions, 'post_author'));
$can_restore = current_user_can('edit_post', $post->ID);
foreach ($revisions as $revision) {
$modified = strtotime($revision->post_modified);
$modified_gmt = strtotime($revision->post_modified_gmt);
if ($can_restore) {
$restore_link = str_replace('&', '&', wp_nonce_url(add_query_arg(array('revision' => $revision->ID, 'action' => 'restore'), admin_url('revision.php')), "restore-post_{$revision->ID}"));
}
if (!isset($authors[$revision->post_author])) {
$authors[$revision->post_author] = array('id' => (int) $revision->post_author, 'avatar' => $show_avatars ? get_avatar($revision->post_author, 32) : '', 'name' => get_the_author_meta('display_name', $revision->post_author));
}
$autosave = (bool) wp_is_post_autosave($revision);
$current = !$autosave && $revision->post_modified_gmt === $post->post_modified_gmt;
if ($current && !empty($current_id)) {
// If multiple revisions have the same post_modified_gmt, highest ID is current.
if ($current_id < $revision->ID) {
$revisions[$current_id]['current'] = false;
$current_id = $revision->ID;
} else {
$current = false;
}
} elseif ($current) {
$current_id = $revision->ID;
}
$revisions[$revision->ID] = array('id' => $revision->ID, 'title' => get_the_title($post->ID), 'author' => $authors[$revision->post_author], 'date' => date_i18n(__('M j, Y @ G:i'), $modified), 'dateShort' => date_i18n(_x('j M @ G:i', 'revision date short format'), $modified), 'timeAgo' => sprintf(__('%s ago'), human_time_diff($modified_gmt, $now_gmt)), 'autosave' => $autosave, 'current' => $current, 'restoreUrl' => $can_restore ? $restore_link : false);
}
// If a post has been saved since the last revision (no revisioned fields were changed)
// we may not have a "current" revision. Mark the latest revision as "current".
if (empty($current_id)) {
if ($revisions[$revision->ID]['autosave']) {
$revision = end($revisions);
while ($revision['autosave']) {
$revision = prev($revisions);
}
$current_id = $revision['id'];
} else {
$current_id = $revision->ID;
}
$revisions[$current_id]['current'] = true;
}
// Now, grab the initial diff
$compare_two_mode = is_numeric($from);
if (!$compare_two_mode) {
$found = array_search($selected_revision_id, array_keys($revisions));
if ($found) {
$from = array_keys(array_slice($revisions, $found - 1, 1, true));
$from = reset($from);
} else {
$from = 0;
}
}
$from = absint($from);
$diffs = array(array('id' => $from . ':' . $selected_revision_id, 'fields' => wp_get_revision_ui_diff($post->ID, $from, $selected_revision_id)));
return array('postId' => $post->ID, 'nonce' => wp_create_nonce('revisions-ajax-nonce'), 'revisionData' => array_values($revisions), 'to' => $selected_revision_id, 'from' => $from, 'diffData' => $diffs, 'baseUrl' => parse_url(admin_url('revision.php'), PHP_URL_PATH), 'compareTwoMode' => absint($compare_two_mode), 'revisionIds' => array_keys($revisions));
}
/**
* Prepare revisions for JavaScript.
*
* @since 3.6.0
*
* @param object|int $post The post object. Also accepts a post ID.
* @param int $selected_revision_id The selected revision ID.
* @param int $from Optional. The revision ID to compare from.
*
* @return array An associative array of revision data and related settings.
*/
function wp_prepare_revisions_for_js($post, $selected_revision_id, $from = null)
{
$post = get_post($post);
$authors = array();
$now_gmt = time();
$revisions = wp_get_post_revisions($post->ID, array('order' => 'ASC', 'check_enabled' => false));
// If revisions are disabled, we only want autosaves and the current post.
if (!wp_revisions_enabled($post)) {
foreach ($revisions as $revision_id => $revision) {
if (!wp_is_post_autosave($revision)) {
unset($revisions[$revision_id]);
}
}
$revisions = array($post->ID => $post) + $revisions;
}
$show_avatars = get_option('show_avatars');
cache_users(wp_list_pluck($revisions, 'post_author'));
$can_restore = current_user_can('edit_post', $post->ID);
$current_id = false;
foreach ($revisions as $revision) {
$modified = strtotime($revision->post_modified);
$modified_gmt = strtotime($revision->post_modified_gmt);
if ($can_restore) {
$restore_link = str_replace('&', '&', wp_nonce_url(add_query_arg(array('revision' => $revision->ID, 'action' => 'restore'), admin_url('revision.php')), "restore-post_{$revision->ID}"));
}
if (!isset($authors[$revision->post_author])) {
$authors[$revision->post_author] = array('id' => (int) $revision->post_author, 'avatar' => $show_avatars ? get_avatar($revision->post_author, 32) : '', 'name' => get_the_author_meta('display_name', $revision->post_author));
}
$autosave = (bool) wp_is_post_autosave($revision);
$current = !$autosave && $revision->post_modified_gmt === $post->post_modified_gmt;
if ($current && !empty($current_id)) {
// If multiple revisions have the same post_modified_gmt, highest ID is current.
if ($current_id < $revision->ID) {
$revisions[$current_id]['current'] = false;
$current_id = $revision->ID;
} else {
$current = false;
}
} elseif ($current) {
$current_id = $revision->ID;
}
$revisions_data = array('id' => $revision->ID, 'title' => get_the_title($post->ID), 'author' => $authors[$revision->post_author], 'date' => date_i18n(__('M j, Y @ H:i'), $modified), 'dateShort' => date_i18n(_x('j M @ H:i', 'revision date short format'), $modified), 'timeAgo' => sprintf(__('%s ago'), human_time_diff($modified_gmt, $now_gmt)), 'autosave' => $autosave, 'current' => $current, 'restoreUrl' => $can_restore ? $restore_link : false);
/**
* Filter the array of revisions used on the revisions screen.
*
* @since 4.4.0
*
* @param array $revisions_data {
* The bootstrapped data for the revisions screen.
*
* @type int $id Revision ID.
* @type string $title Title for the revision's parent WP_Post object.
* @type int $author Revision post author ID.
* @type string $date Date the revision was modified.
* @type string $dateShort Short-form version of the date the revision was modified.
* @type string $timeAgo GMT-aware amount of time ago the revision was modified.
* @type bool $autosave Whether the revision is an autosave.
* @type bool $current Whether the revision is both not an autosave and the post
* modified date matches the revision modified date (GMT-aware).
* @type bool|false $restoreUrl URL if the revision can be restored, false otherwise.
* }
* @param WP_Post $revision The revision's WP_Post object.
* @param WP_Post $post The revision's parent WP_Post object.
*/
$revisions[$revision->ID] = apply_filters('wp_prepare_revision_for_js', $revisions_data, $revision, $post);
}
/**
* If we only have one revision, the initial revision is missing; This happens
* when we have an autsosave and the user has clicked 'View the Autosave'
*/
if (1 === sizeof($revisions)) {
$revisions[$post->ID] = array('id' => $post->ID, 'title' => get_the_title($post->ID), 'author' => $authors[$post->post_author], 'date' => date_i18n(__('M j, Y @ H:i'), strtotime($post->post_modified)), 'dateShort' => date_i18n(_x('j M @ H:i', 'revision date short format'), strtotime($post->post_modified)), 'timeAgo' => sprintf(__('%s ago'), human_time_diff(strtotime($post->post_modified_gmt), $now_gmt)), 'autosave' => false, 'current' => true, 'restoreUrl' => false);
$current_id = $post->ID;
}
/*
* If a post has been saved since the last revision (no revisioned fields
* were changed), we may not have a "current" revision. Mark the latest
* revision as "current".
*/
if (empty($current_id)) {
if ($revisions[$revision->ID]['autosave']) {
$revision = end($revisions);
while ($revision['autosave']) {
$revision = prev($revisions);
}
$current_id = $revision['id'];
} else {
$current_id = $revision->ID;
}
$revisions[$current_id]['current'] = true;
}
// Now, grab the initial diff.
$compare_two_mode = is_numeric($from);
if (!$compare_two_mode) {
$found = array_search($selected_revision_id, array_keys($revisions));
if ($found) {
$from = array_keys(array_slice($revisions, $found - 1, 1, true));
$from = reset($from);
} else {
$from = 0;
}
}
$from = absint($from);
$diffs = array(array('id' => $from . ':' . $selected_revision_id, 'fields' => wp_get_revision_ui_diff($post->ID, $from, $selected_revision_id)));
return array('postId' => $post->ID, 'nonce' => wp_create_nonce('revisions-ajax-nonce'), 'revisionData' => array_values($revisions), 'to' => $selected_revision_id, 'from' => $from, 'diffData' => $diffs, 'baseUrl' => parse_url(admin_url('revision.php'), PHP_URL_PATH), 'compareTwoMode' => absint($compare_two_mode), 'revisionIds' => array_keys($revisions));
}
