/*
 * 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 "content.h"
#include "core/request.h"
#include "core/error.h"
#include "core/data.h"
#include "core/plugin.h"


bool Content::RemoveCheckAccess()
{
	if( !request.is_item )
	{
		if( !request.CanRemove(*request.dir_table.back()) )
		{
			request.status = WINIX_ERR_PERMISSION_DENIED;
			return false;
		}
	}
	else
	if( !request.CanRemove(request.item) )
	{
		request.status = WINIX_ERR_PERMISSION_DENIED;
		return false;
	}


return true;
}



void Content::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 Content::RemoveAllDirs(long dir_id)
{
	DirContainer::ParentIterator pnext, p = data.dirs.FindFirstParent(dir_id);
	
	for( ; p != data.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 = data.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_table, rm_auth_iq);

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

	if( db.DelDirById(dir_id) == WINIX_ERR_OK )
	{
		data.dirs.DelDir(dir_id);

		db.RemoveThread(dir_id);
		db.RemoveTicket(dir_id);

		plugin.Call(WINIX_DIR_REMOVED, dir_id);
	}
}



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

	// this method deletes recursively all directories
	RemoveAllDirs(request.dir_table.back()->id);
	request.dir_table.erase(--request.dir_table.end());
	
	if( request.dir_table.empty() )
	{
		// we have deleted the root directory
		data.dirs.CheckRootDir(); // adding a new root dir
		Item * proot = data.dirs.GetRootDir();
		
		if( proot )			
			request.dir_table.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 Content::Make() will check that the dir_table is empty and returns
			return;
	}

	RedirectToLastDir();
}


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



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

	if( remove(item.auth_path.c_str()) == 0 )
	{
		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 Content::RemoveFile()
{
	// for safety we check if param_table is empty
	// a user can use "confirm" but can make a mistake when typing
	if( !request.param_table.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( data.mounts.pmount->type == Mount::thread )
			db.EditThreadRemoveItem(request.item.parent_id);
		else
		if( data.mounts.pmount->type == Mount::ticket )
			db.EditTicketRemoveItem(request.item.id);

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

	RedirectToLastDir();
}



void Content::FunRm()
{
	if( !RemoveCheckAccess() )
		return;

	if( request.IsParam("confirm") )
		return; // show confirmation dialog

	if( request.is_item )
		RemoveFile();
	else
		RemoveDir();
}