From 28cd8594a7dcaf7d21b8b92c44ace34dc8aa6dd4 Mon Sep 17 00:00:00 2001
From: friendica <info@friendica.com>
Date: Sun, 16 Jun 2013 20:44:29 -0700
Subject: implement 'can_comment_on_post()' which doesn't require a separate DB
 lookup per item.

---
 include/ItemObject.php |  2 +-
 include/items.php      | 42 +++++++++++++++++++++++++++++++++++++++++-
 include/text.php       |  2 +-
 3 files changed, 43 insertions(+), 3 deletions(-)

diff --git a/include/ItemObject.php b/include/ItemObject.php
index ccd192ff5..351f446d4 100644
--- a/include/ItemObject.php
+++ b/include/ItemObject.php
@@ -44,7 +44,7 @@ class Item extends BaseObject {
 		$this->commentable = $this->writable;
 
 		if(($this->observer) && (! $this->writable)) {
-			$this->commentable = perm_is_allowed($this->data['uid'],$this->observer['xchan_hash'],'post_comments');
+			$this->commentable = can_comment_on_post($this->observer['xchan_hash'],$data);
 		}
 
 //		logger('writable: ' . $this->writable);
diff --git a/include/items.php b/include/items.php
index 9d93accfe..93fc09ae9 100755
--- a/include/items.php
+++ b/include/items.php
@@ -53,6 +53,37 @@ function collect_recipients($item,&$private) {
 
 }
 
+
+function can_comment_on_post($observer_xchan,$item) {
+	if(! $observer_xchan)
+		return false;
+	if($item['comment_policy'] === 'none')
+		return false;
+	switch($item['comment_policy']) {
+		case 'self':
+			if($observer_xchan === $item['author_xchan'] || $observer_xchan === $item['owner_xchan'])
+				return true;
+			break;
+		case 'public':
+			return false;
+			break;
+		case 'contacts':
+		case '':
+			if(($item['owner']['abook_xchan']) && ($item['owner']['abook_their_perms'] & PERMS_W_COMMENT))
+				return true;
+			break;
+		default:
+			break;
+	}
+	if(strstr('network:',$item['comment_policy']) && strstr('red',$item['comment_policy']))
+		return true;
+	if(strstr('site:', $item['comment_policy']) && strstr(get_app()->get_hostname(),$item['comment_policy']))
+		return true;
+	
+	return false;
+}
+
+
 /**
  * @function red_zrl_callback
  *   preg_match function when fixing 'naked' links in mod item.php
@@ -142,6 +173,7 @@ function post_activity_item($arr) {
 	$arr['deny_cid']     = ((x($arr,'deny_cid')) ? $arr['deny_cid'] : $channel['channel_deny_cid']);
 	$arr['deny_gid']     = ((x($arr,'deny_gid')) ? $arr['deny_gid'] : $channel['channel_deny_gid']);
 
+	$arr['comment_policy'] = map_policy($channel['channel_w_comment']); 
 
 	// for the benefit of plugins, we will behave as if this is an API call rather than a normal online post
 
@@ -481,7 +513,8 @@ function get_item_elements($x) {
 	$arr['mimetype']     = (($x['mimetype'])       ? htmlentities($x['mimetype'],       ENT_COMPAT,'UTF-8',false) : '');
 	$arr['obj_type']     = (($x['object_type'])    ? htmlentities($x['object_type'],    ENT_COMPAT,'UTF-8',false) : '');
 	$arr['tgt_type']     = (($x['target_type'])    ? htmlentities($x['target_type'],    ENT_COMPAT,'UTF-8',false) : '');
-
+	$arr['comment_policy'] = (($x['comment_scope']) ? htmlentities($x['comment_scope'],  ENT_COMPAT,'UTF-8',false) : 'contacts');
+	
 	$arr['object']       = activity_sanitise($x['object']);
 	$arr['target']       = activity_sanitise($x['target']);
 
@@ -1332,10 +1365,17 @@ function item_store($arr,$force_parent = false) {
 	$arr['attach']        = ((x($arr,'attach'))        ? notags(trim($arr['attach']))        : '');
 	$arr['app']           = ((x($arr,'app'))           ? notags(trim($arr['app']))           : '');
 	$arr['item_restrict'] = ((x($arr,'item_restrict')) ? intval($arr['item_restrict'])       : 0 );
+
+	$arr['comment_policy'] = ((x($arr,'comment_policy')) ? notags(trim($arr['comment_policy']))  : 'contacts' );
+
 	$arr['item_flags']    = ((x($arr,'item_flags'))    ? intval($arr['item_flags'])          : 0 );
 	
 	$arr['item_flags'] = $arr['item_flags'] | ITEM_UNSEEN;
 
+	if($arr['comment_policy'] == 'none')
+		$arr['item_flags'] = $arr['item_flags'] | ITEM_NOCOMMENT;
+
+
 
 	// handle time travelers
 	// Allow a bit of fudge in case somebody just has a slightly slow/fast clock
diff --git a/include/text.php b/include/text.php
index 71f2257ac..c51ee0bd2 100755
--- a/include/text.php
+++ b/include/text.php
@@ -1794,7 +1794,7 @@ function ids_to_querystr($arr,$idx = 'id') {
 // author_xchan and owner_xchan. If $abook is true also include the abook info. 
 // This is needed in the API to save extra per item lookups there.
 
-function xchan_query(&$items,$abook = false) {
+function xchan_query(&$items,$abook = true) {
 	$arr = array();
 	if($items && count($items)) {
 		foreach($items as $item) {
-- 
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