/*
 * This file is a part of Winix
 * and is not publicly distributed
 * 
 * Copyright (c) 2008-2010, Tomasz Sowa
 * All rights reserved.
 * 
 */
 
#include <cstdio>
#include <errno.h>
#include "rm.h"
#include "core/plugin.h"
#include "core/misc.h"
#include "templates/templates.h"



namespace Fun
{

Rm::Rm()
{
	fun.url = L"rm";
}



bool Rm::HasAccess(const Item & item)
{
	// !! temporarily (we're waiting for the sticky bit to be implemented)
	// not logged users cannot remove anything
	if( !request->session->puser )
		return false;

	if( item.parent_id == -1 )
	{
		// rm for the root dir
		// only the superuser can do it
		if( !request->session->puser || !request->session->puser->super_user )
			return false;
	}
	else
	{
		Item * last_but_one_dir = system->dirs.GetDir(item.parent_id);
		
		if( !last_but_one_dir )
			// ops, there is no a parent dir
			return false;

		if( !system->HasWriteAccess(*last_but_one_dir) )
			return false;
	}

	if( system->mounts.pmount->IsPar(system->mounts.MountParOnlyRootRemove()) )
		if( !request->session->puser || !request->session->puser->super_user )
			return false;
	
return true;	
}


bool Rm::HasAccess()
{
	if( !request->is_item )
		return HasAccess(*request->dir_tab.back());
	else
		return HasAccess(request->item);

return true;
}



void Rm::RemoveAuthPrepareQuery()
{
	rm_auth_iq.SetAll(true, false);

	rm_auth_iq.sel_parent_id = true;
	rm_auth_iq.sel_type      = true;
	rm_auth_iq.sel_auth      = true;

	rm_auth_iq.WhereType(Item::file);
	rm_auth_iq.WhereAuth(Item::auth_none, false);
}



void Rm::RemoveAllDirs(long dir_id)
{
	DirContainer::ParentIterator pnext, p = system->dirs.FindFirstParent(dir_id);
	
	for( ; p != system->dirs.ParentEnd() ; p = pnext )
	{
		// this iterator p will be deleted by the next DeleteDir(p->second->id)
		// (the next iterator we must calculate beforehand)
		pnext = system->dirs.NextParent(p); 
		RemoveAllDirs(p->second->id);
	}

	plugin.Call(WINIX_DIR_PREPARE_TO_REMOVE, dir_id);

	rm_auth_iq.WhereParentId(dir_id);
	db->GetItems(request->item_tab, rm_auth_iq);

	for(size_t i=0 ; i<request->item_tab.size() ; ++i)
		RemoveAuth(request->item_tab[i]);

	if( db->DelDirById(dir_id) == WINIX_ERR_OK )
	{
		system->dirs.DelDir(dir_id);

		db->RemoveThread(dir_id);
// !! tticket
//		db->RemoveTicket(dir_id);

		plugin.Call(WINIX_DIR_REMOVED, dir_id);
	}
}



void Rm::RemoveAllDirs()
{
	RemoveAuthPrepareQuery();

	// this method deletes recursively all directories
	RemoveAllDirs(request->dir_tab.back()->id);
	request->dir_tab.erase(--request->dir_tab.end());
	
	if( request->dir_tab.empty() )
	{
		// we have deleted the root directory
		system->dirs.CheckRootDir(); // adding a new root dir
		Item * proot = system->dirs.GetRootDir();
		
		if( proot )			
			request->dir_tab.push_back(proot);
		else
			// there is no a root dir
			// CheckRootDir() didn't add the root dir (probably problem with the database)
			// make sure that ::Make() will check that the dir_tab is empty and returns
			return;
	}

	system->RedirectToLastDir();
}


void Rm::RemoveDir()
{
	if( request->param_tab.empty() )
		request->status = WINIX_ERR_PERMISSION_DENIED; // use parameter "r" for removing a directory
	else
	if( request->IsParam(L"r") )
		RemoveAllDirs();
	else
		request->status = WINIX_ERR_UNKNOWN_PARAM;
}



void Rm::RemoveAuth(Item & item)
{
	if( item.auth_path.empty() )
	{
		log << log1 << "Content: can't remove a static file: auth_path is empty" << logend;
		return;
	}

	if( ::RemoveFile(item.auth_path) )
	{
		log << log1 << "Content: removed static file: " << item.auth_path << logend;
		item.auth_path.clear();
		item.auth = Item::auth_none;
		// we don't store it to db (will be removed or is removed already)
	}
	else
	{
		int err = errno;

		log << log1 << "Content: can't remove a file: " << item.auth_path;
		log.SystemErr(err);
		log << logend;

		request->status = WINIX_ERR_PERMISSION_DENIED;
	}
}



void Rm::RemoveFile()
{
	// for safety we check if param_tab is empty
	// a user can use "confirm" but can make a mistake when typing
	if( !request->param_tab.empty() )
	{
		request->status = WINIX_ERR_UNKNOWN_PARAM;
		return;
	}
	

	if( db->DelItem( request->item ) )
	{
		log << log2 << "Content: deleted item: subject: " << request->item.subject << ", id: " << request->item.id << logend;
		TemplatesFunctions::pattern_cacher.DeletePattern(request->item);
		
		plugin.Call(WINIX_FILE_REMOVED, request->item.id);

		if( system->mounts.pmount->type == system->mounts.MountTypeThread() )
			db->EditThreadRemoveItem(request->item.parent_id);
		/*
		!! tticket
		else
		if( system->mounts.pmount->type == system->mounts.MountTypeTicket() )
			db->EditTicketRemoveItem(request->item.id);
		*/

		if( request->item.auth != Item::auth_none )
			RemoveAuth(request->item);
	}
	else
	{
		request->status = WINIX_ERR_NO_ITEM;
	}

	system->RedirectToLastDir();
}



void Rm::MakeGet()
{
	if( request->IsParam(L"confirm") )
		return; // show confirmation dialog

	if( request->is_item )
		RemoveFile();
	else
		RemoveDir();
}



} // namespace