Add hook to comments_are_now_closed()

doc/hook/comments_are_now_closed.bb

@@ -0,0 +1,11 @@
+[h3]comments_are_now_closed[/h3]
+
+Called when deciding whether or not commenting is closed for an item.
+
+
+Hook data (array):
+	item => posted item
+	closed => 'unset'
+
+
+To over-ride the default behaviour, change closed to true or false

doc/hooklist.bb

@@ -154,6 +154,9 @@ Hooks allow plugins/addons to "hook into" the code at many points and alter the
 [zrl=[baseurl]/help/hook/comment_buttons]comment_buttons[/zrl]
 	Called when rendering the edit buttons for comments
 
+[zrl=[baseurl]/help/hook/comments_are_now_closed]comments_are_now_closed[/zrl]
+	Called when deciding whether or not to present a comment box for a post
+
 [zrl=[baseurl]/help/hook/connect_premium]connect_premium[/zrl]
 	Called when connecting to a premium channel
 

include/items.php

@@ -206,6 +206,25 @@ function collect_recipients($item, &$private_envelope,$include_groups = true) {
 }
 
 function comments_are_now_closed($item) {
+
+	$x = [
+		'item' => $item,
+		'closed' => 'unset'
+	];
+
+	/**
+	 * @hooks comments_are_now_closed
+	 *   Called to determine whether commenting should be closed
+	 *   * \e array \b item
+	 *   * \e boolean \b closed - return value
+	 */
+
+	call_hooks('comments_are_now_closed', $x);
+
+	if ($x['closed'] != 'unset') {
+		return $x['closed'];
+	}
+
 	if($item['comments_closed'] > NULL_DATE) {
 		$d = datetime_convert();
 		if($d > $item['comments_closed'])