<?php
/**
* WordPress Comment Administration API.
*
* @package WordPress
* @subpackage Administration
* @since 2.3.0
*/

/**
* Determines if a comment exists based on author and date.
*
* For best performance, use `$timezone = 'gmt'`, which queries a field that is properly indexed. The default value
* for `$timezone` is 'blog' for legacy reasons.
*
* @since 2.0.0
* @since 4.4.0 Added the `$timezone` parameter.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $comment_author Author of the comment.
* @param string $comment_date Date of the comment.
* @param string $timezone Timezone. Accepts 'blog' or 'gmt'. Default 'blog'.
* @return string|null Comment post ID on success.
*/
function comment_exists( $comment_author, $comment_date, $timezone = 'blog' ) {
global $wpdb;

$date_field = 'comment_date';
if ( 'gmt' === $timezone ) {
$date_field = 'comment_date_gmt';
}

return $wpdb->get_var(
$wpdb->prepare(
"SELECT comment_post_ID FROM $wpdb->comments
WHERE comment_author = %s AND $date_field = %s",
stripslashes( $comment_author ),
stripslashes( $comment_date )
)
);
}

/**
* Updates a comment with values provided in $_POST.
*
* @since 2.0.0
* @since 5.5.0 A return value was added.
*
* @return int|WP_Error The value 1 if the comment was updated, 0 if not updated.
* A WP_Error object on failure.
*/
function edit_comment() {
if ( ! current_user_can( 'edit_comment', (int) $_POST['comment_ID'] ) ) {
wp_die( __( 'Sorry, you are not allowed to edit comments on this post.' ) );
}

if ( isset( $_POST['newcomment_author'] ) ) {
$_POST['comment_author'] = $_POST['newcomment_author'];
}
if ( isset( $_POST['newcomment_author_email'] ) ) {
$_POST['comment_author_email'] = $_POST['newcomment_author_email'];
}
if ( isset( $_POST['newcomment_author_url'] ) ) {
$_POST['comment_author_url'] = $_POST['newcomment_author_url'];
}
if ( isset( $_POST['comment_status'] ) ) {
$_POST['comment_approved'] = $_POST['comment_status'];
}
if ( isset( $_POST['content'] ) ) {
$_POST['comment_content'] = $_POST['content'];
}
if ( isset( $_POST['comment_ID'] ) ) {
$_POST['comment_ID'] = (int) $_POST['comment_ID'];
}

foreach ( array( 'aa', 'mm', 'jj', 'hh', 'mn' ) as $timeunit ) {
if ( ! empty( $_POST[ 'hidden_' . $timeunit ] ) && $_POST[ 'hidden_' . $timeunit ] !== $_POST[ $timeunit ] ) {
$_POST['edit_date'] = '1';
break;
}
}

if ( ! empty( $_POST['edit_date'] ) ) {
$aa = $_POST['aa'];
$mm = $_POST['mm'];
$jj = $_POST['jj'];
$hh = $_POST['hh'];
$mn = $_POST['mn'];
$ss = $_POST['ss'];
$jj = ( $jj > 31 ) ? 31 : $jj;
$hh = ( $hh > 23 ) ? $hh - 24 : $hh;
$mn = ( $mn > 59 ) ? $mn - 60 : $mn;
$ss = ( $ss > 59 ) ? $ss - 60 : $ss;

$_POST['comment_date'] = "$aa-$mm-$jj $hh:$mn:$ss";
}

return wp_update_comment( $_POST, true );
}

/**
* Returns a WP_Comment object based on comment ID.
*
* @since 2.0.0
*
* @param int $id ID of comment to retrieve.
* @return WP_Comment|false Comment if found. False on failure.
*/
function get_comment_to_edit( $id ) {
$comment = get_comment( $id );
if ( ! $comment ) {
return false;
}

$comment->comment_ID = (int) $comment->comment_ID;
$comment->comment_post_ID = (int) $comment->comment_post_ID;

$comment->comment_content = format_to_edit( $comment->comment_content );
/**
* Filters the comment content before editing.
*
* @since 2.0.0
*
* @param string $comment_content Comment content.
*/
$comment->comment_content = apply_filters( 'comment_edit_pre', $comment->comment_content );

$comment->comment_author = format_to_edit( $comment->comment_author );
$comment->comment_author_email = format_to_edit( $comment->comment_author_email );
$comment->comment_author_url = format_to_edit( $comment->comment_author_url );
$comment->comment_author_url = esc_url( $comment->comment_author_url );

return $comment;
}

/**
* Gets the number of pending comments on a post or posts.
*
* @since 2.3.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int|int[] $post_id Either a single Post ID or an array of Post IDs
* @return int|int[] Either a single Posts pending comments as an int or an array of ints keyed on the Post IDs
*/
function get_pending_comments_num( $post_id ) {
global $wpdb;

$single = false;
if ( ! is_array( $post_id ) ) {
$post_id_array = (array) $post_id;
$single = true;
} else {
$post_id_array = $post_id;
}
$post_id_array = array_map( 'intval', $post_id_array );
$post_id_in = "'" . implode( "', '", $post_id_array ) . "'";

$pending = $wpdb->get_results( "SELECT comment_post_ID, COUNT(comment_ID) as num_comments FROM $wpdb->comments WHERE comment_post_ID IN ( $post_id_in ) AND comment_approved = '0' GROUP BY comment_post_ID", ARRAY_A );

if ( $single ) {
if ( empty( $pending ) ) {
return 0;
} else {
return absint( $pending[0]['num_comments'] );
}
}

$pending_keyed = array();

// Default to zero pending for all posts in request.
foreach ( $post_id_array as $id ) {
$pending_keyed[ $id ] = 0;
}

if ( ! empty( $pending ) ) {
foreach ( $pending as $pend ) {
$pending_keyed[ $pend['comment_post_ID'] ] = absint( $pend['num_comments'] );
}
}

return $pending_keyed;
}

/**
* Adds avatars to relevant places in admin.
*
* @since 2.5.0
*
* @param string $name User name.
* @return string Avatar with the user name.
*/
function floated_admin_avatar( $name ) {
$avatar = get_avatar( get_comment(), 32, 'mystery' );
return "$avatar $name";
}

/**
* Enqueues comment shortcuts jQuery script.
*
* @since 2.7.0
*/
function enqueue_comment_hotkeys_js() {
if ( 'true' === get_user_option( 'comment_shortcuts' ) ) {
wp_enqueue_script( 'jquery-table-hotkeys' );
}
}

/**
* Displays error message at bottom of comments.
*
* @param string $msg Error Message. Assumed to contain HTML and be sanitized.
*/
function comment_footer_die( $msg ) {
echo "<div class='wrap'><p>$msg</p></div>";
require_once ABSPATH . 'wp-admin/admin-footer.php';
die;
}