Merge commit 'upstream/master'

1 files changed, 83 insertions, 3 deletions

diff --git a/include/security.php b/include/security.php
index bc2c9f0bf..8c536b656 100755
--- a/include/security.php
+++ b/include/security.php
@@ -108,14 +108,18 @@ function can_write_wall(&$a,$owner) {
 
 	if(remote_user()) {
 
-		// user remembered decision and avoid a DB lookup for each and every display item
+		// use remembered decision and avoid a DB lookup for each and every display item
 		// DO NOT use this function if there are going to be multiple owners
 
+		// We have a contact-id for an authenticated remote user, this block determines if the contact
+		// belongs to this page owner, and has the necessary permissions to post content
+
 		if($verified === 2)
 			return true;
 		elseif($verified === 1)
 			return false;
 		else {
+
 			$r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` LEFT JOIN `user` on `user`.`uid` = `contact`.`uid` 
 				WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0 
 				AND `user`.`blockwall` = 0 AND `readonly` = 0  AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1",
@@ -125,6 +129,7 @@ function can_write_wall(&$a,$owner) {
 				intval(CONTACT_IS_FRIEND),
 				intval(PAGE_COMMUNITY)
 			);
+
 			if(count($r)) {
 				$verified = 2;
 				return true;
@@ -197,7 +202,7 @@ function permissions_sql($owner_id,$remote_verified = false,$groups = null) {
 				" AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' ) 
 				  AND ( deny_cid  = '' OR  NOT deny_cid REGEXP '<%d>' ) 
 				  AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
-				  AND ( deny_gid  = '' OR NOT deny_gid REGEXP '%s') 
+				  AND ( deny_gid  = '' OR NOT deny_gid REGEXP '%s')
 				",
 				intval($remote_user),
 				intval($remote_user),
@@ -207,4 +212,79 @@ function permissions_sql($owner_id,$remote_verified = false,$groups = null) {
 		}
 	}
 	return $sql;
-}
\ No newline at end of file
+}
+
+
+function item_permissions_sql($owner_id,$remote_verified = false,$groups = null) {
+
+	$local_user = local_user();
+	$remote_user = remote_user();
+
+	/**
+	 * Construct permissions
+	 *
+	 * default permissions - anonymous user
+	 */
+
+	$sql = " AND allow_cid = '' 
+			 AND allow_gid = '' 
+			 AND deny_cid  = '' 
+			 AND deny_gid  = '' 
+			 AND private = 0
+	";
+
+	/**
+	 * Profile owner - everything is visible
+	 */
+
+	if(($local_user) && ($local_user == $owner_id)) {
+		$sql = ''; 
+	}
+
+	/**
+	 * Authenticated visitor. Unless pre-verified, 
+	 * check that the contact belongs to this $owner_id
+	 * and load the groups the visitor belongs to.
+	 * If pre-verified, the caller is expected to have already
+	 * done this and passed the groups into this function.
+	 */
+
+	elseif($remote_user) {
+
+		if(! $remote_verified) {
+			$r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
+				intval($remote_user),
+				intval($owner_id)
+			);
+			if(count($r)) {
+				$remote_verified = true;
+				$groups = init_groups_visitor($remote_user);
+			}
+		}
+		if($remote_verified) {
+		
+			$gs = '<<>>'; // should be impossible to match
+
+			if(is_array($groups) && count($groups)) {
+				foreach($groups as $g)
+					$gs .= '|<' . intval($g) . '>';
+			} 
+
+			$sql = sprintf(
+				" AND ( private = 0 OR ( private = 1 AND wall = 1 AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' ) 
+				  AND ( deny_cid  = '' OR  NOT deny_cid REGEXP '<%d>' ) 
+				  AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
+				  AND ( deny_gid  = '' OR NOT deny_gid REGEXP '%s'))) 
+				",
+				intval($remote_user),
+				intval($remote_user),
+				dbesc($gs),
+				dbesc($gs)
+			);
+		}
+	}
+
+	return $sql;
+}
+
+