Merge branch 'master' of https://github.com/alexvitkov/india

2 files changed, 55 insertions, 1 deletions

diff --git a/php/database.php b/php/database.php
index 668490a..74210eb 100644
--- a/php/database.php
+++ b/php/database.php
@@ -291,6 +291,7 @@ require_once "node.php";
 		   we remove the node and
 		   1. move the file represented by the node to the trash folder
 		   2. remove the file
+		   3. if node is a directory - delete all children nodes
 		   depends on the conf file
 		 */
 		function delete_node_by_id(int $node_id)
@@ -375,6 +376,37 @@ require_once "node.php";
 			}
 		}
 
+
+		function unlink_nodes(int $dir_id, int $node_id)
+		{
+			$prep=$this->pdo->prepare("delete from node_links
+						   where directory_id=:dir_id and node_id=:node_id
+						");
+			$prep->bindParam(':dir_id',$dir_id);
+			$prep->bindParam(':node_id',$node_id);
+			if($prep->execute()==false)
+			{
+				error_log("there was an error with the first statement in unlink_nodes");
+				return;
+			}
+			$prep=$this->pdo->prepare("select node_id 
+						   from node_links 
+						   where node_id=:id
+							");
+			$prep->bindParam(':id',$node_id);
+			if($prep->execute()==false)
+			{
+				error_log("there was an error with the second statement in unlink_nodes");
+				return;
+			}
+			if(count($prep->fetchALL(PDO::FETCH_ASSOC))==0)
+			{
+				delete_node_by_id($node_id);
+			}
+
+
+		}
+
 		function create_home_directory():int
 		{
 			$ret=$this->create_dangling_directory();
diff --git a/sql/fileshare.sql b/sql/fileshare.sql
index 8e69881..b0c28a5 100644
--- a/sql/fileshare.sql
+++ b/sql/fileshare.sql
@@ -2,6 +2,8 @@
 drop table if exists node_access;
 drop table if exists users;
 drop table if exists node_links;
+drop table if exists trash;
+drop trigger if exists delete_on_zero_links;
 drop table if exists nodes;
 
 
@@ -42,9 +44,29 @@ create table node_links (
 	node_id int not null,
 	name varchar(100) not null default 'no name',
 	note varchar(200) not null default "",
-	check (directory_id != node_id), 
 	foreign key (directory_id) references nodes(node_id) on delete cascade,
 	foreign key (node_id) references nodes(node_id) on delete cascade
 );
 
+create table trash (
+	node_id int not null,
+	foreign key (node_id) references nodes(node_id) on delete cascade	
+);
+
 
+create trigger delete_on_zero_links
+	after delete
+	on node_links
+	for each row 
+		insert into trash
+		select nodes.node_id
+		from nodes
+		where nodes.node_id not in (select node_id from node_links) and nodes.node_id=old.node_id;
+			
+		/*
+create trigger delete_links
+	after delete
+	on nodes
+	for each row
+		delete from 
+		*/