@@ -101,6 +101,17 @@ function do_pattern_actions() {
 		}
 	} else if ( 'report' === $action ) {
 		if ( wp_verify_nonce( $nonce, 'report-' . $post_id ) && current_user_can( 'read' ) ) {
+			$existing = new \WP_Query( array(
+				'post_type'   => FLAG_POST_TYPE,
+				'post_parent' => $post_id,
+				'post_status' => PENDING_STATUS,
+				'author'      => get_current_user_id(),
+			) );
+			if ( $existing->found_posts > 0 ) {
+				wp_safe_redirect( add_query_arg( array( 'status' => 'already-reported' ), get_the_permalink() ) );
+				return;
+			}
+
 			$success = wp_insert_post(
 				array(
 					'post_type'   => FLAG_POST_TYPE,
 
@@ -16,6 +16,8 @@
 } else if ( 'reported' === $action_status ) {
 	$notice_type = 'info';
 	$notice = __( 'Your report has been submitted.', 'wporg-patterns' );
+} else if ( 'already-reported' === $action_status ) {
+	$notice = __( 'You have already reported this pattern.', 'wporg-patterns' );
 }
 
 ?>
Original file line number	Diff line number	Diff line change
`@@ -16,6 +16,8 @@`
`16`	`16`	`} else if ( 'reported' === $action_status ) {`
`17`	`17`	`$notice_type = 'info';`
`18`	`18`	`$notice = __( 'Your report has been submitted.', 'wporg-patterns' );`
	`19`	`+} else if ( 'already-reported' === $action_status ) {`
	`20`	`+ $notice = __( 'You have already reported this pattern.', 'wporg-patterns' );`
`19`	`21`	`}`
`20`	`22`
`21`	`23`	`?>`