added: privileges (user, groups, permissions)

(not finished yet)
       classes: User, Group, Users, Groups, UGContainer
changed: Dir class into Dirs


git-svn-id: svn://ttmath.org/publicrep/cmslu/trunk@467 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/dirs.cpp

@@ -0,0 +1,220 @@
+/*
+ * This file is a part of CMSLU -- Content Management System like Unix
+ * and is not publicly distributed
+ * 
+ * Copyright (c) 2008, Tomasz Sowa
+ * All rights reserved.
+ * 
+ */
+ 
+#include "dirs.h"
+
+
+void Dirs::Clear()
+{
+	dir_table.Clear();
+	
+	// !! temporarily not clearing
+	//root.Clear();
+	root.id = -1;
+}
+
+
+void Dirs::ReadDirs()
+{
+	Clear();
+
+	db.GetDirs(dir_table);
+}
+
+
+
+
+bool Dirs::GetDir(const std::string & name, long parent, Item ** item)
+{
+	DirContainer::ParentIterator i = dir_table.FindFirstParent(parent);
+	
+	for( ; i!=dir_table.ParentEnd() ; i = dir_table.NextParent(i) )
+		if( i->second->url == name )
+		{
+			*item = &(*i->second);
+			return true;
+		}
+	
+return false;
+}
+
+
+bool Dirs::ExtractName(const char * & s, std::string & name)
+{
+	name.clear();
+	
+	// skipping first slashes (can be more than one)
+	for( ; *s == '/' ; ++s);
+	
+	for( ; *s != 0 && *s != '/' ; ++s)
+		name += *s;
+	
+return !name.empty();
+}
+
+
+
+
+bool Dirs::GetDir(const std::string & path, Item ** item)
+{
+	long parent = -1;
+	std::string name;
+	const char * s = path.c_str();
+	Item * pitem = &root;
+	
+	while( ExtractName(s, name) )
+	{
+		if( !GetDir(name, parent, &pitem) )
+			return false;
+	}
+	
+	*item = pitem;
+	
+return true;
+}
+
+
+
+
+bool Dirs::GetDirId(const std::string & path, long * id)
+{
+Item * pitem;
+	
+	if( !GetDir(path, &pitem) )
+		return false;
+
+	*id = pitem->id;
+	
+return true;
+}
+
+
+bool Dirs::GetDirId(const std::string & name, long parent, long * id)
+{
+Item * pitem;
+	
+	if( !GetDir(name, parent, &pitem) )
+		return false;
+
+	*id = pitem->id;
+	
+return true;
+}
+
+
+
+bool Dirs::IsDir(long id)
+{
+	if( id == -1 )
+		// root directory
+		return true;
+		
+	DirContainer::Iterator i = dir_table.FindId(id);	
+
+	if( i == dir_table.End() )
+		return false;
+		
+return true;
+}
+
+
+
+
+bool Dirs::GetDirChilds(long parent, std::vector<Item> & childs_table)
+{
+	if( !IsDir(parent) )
+		return false;
+	
+	DirContainer::ParentIterator i = dir_table.FindFirstParent(parent);	
+	
+	for( ; i != dir_table.ParentEnd() ; i = dir_table.NextParent(i) )
+		childs_table.push_back( *i->second );
+		
+return true;
+}
+
+
+
+
+
+// dodatkowo moze metoda AppendPath dodajaca sciezke do biezacego stringa?
+// albo tutaj stringa nie czyscic?
+// O(m * log n) (m- how many parts are in 'id')
+bool Dirs::MakePath(long id, std::string & path)
+{
+DirContainer::Iterator i;
+
+	path.clear();
+
+	while( true )
+	{
+		if( id == -1 )
+			return true;
+		
+		i = dir_table.FindId(id);
+		
+		if( i == dir_table.End() )
+			return false;
+		
+		id = i->parent_id;
+		path.insert(path.begin(), '/');
+		path.insert(0, i->url);
+	}
+}
+
+
+
+// with exceptions
+
+Item * Dirs::GetDir(const std::string & path)
+{
+Item * pitem;
+	
+	if( !GetDir(path, &pitem) )
+		throw Error(Error::incorrect_dir);
+		
+return pitem;
+}
+
+
+Item * Dirs::GetDir(const std::string & name, long parent)
+{
+Item * pitem;
+	
+	if( !GetDir(name, parent, &pitem) )
+		throw Error(Error::incorrect_dir);
+		
+return pitem;
+	
+}
+
+
+long Dirs::GetDirId(const std::string & path)
+{
+long id;
+	
+	if( !GetDirId(path, &id) )
+		throw Error(Error::incorrect_dir);
+		
+return id;
+}
+
+
+long Dirs::GetDirId(const std::string & name, long parent)
+{
+long id;
+	
+	if( !GetDirId(name, parent, &id) )
+		throw Error(Error::incorrect_dir);
+		
+return id;
+}
+
+
+