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



namespace Fun
{

Upload::Upload()
{
	fun.url = "upload";
}




bool Upload::HasAccess(const Item & item)
{
	// you can use 'upload' only in a directory
	if( item.type != Item::dir )
		return false;
	
	// we must know where to store the file
	if( !system->mounts.pmount )
		return false;

	if( system->mounts.pmount->fs == Mount::simplefs && config->auth_simplefs_dir.empty() )
	{
		log << log1 << "Request: can't use upload function, auth_simplefs_dir must be set in the config file" << logend;
		return false;
	}

	if( system->mounts.pmount->fs == Mount::hashfs && config->auth_hashfs_dir.empty() )
	{
		log << log1 << "Request: can't use upload function, auth_hashfs_dir must be set in the config file" << logend;
		return false;
	}

	if( config->auth_tmp_dir.empty() )
	{
		log << log1 << "Request: can't use upload function, auth_tmp_dir must be set in the config file" << logend;
		return false;
	}

	if( request->session->puser && request->session->puser->super_user )
		// super user can use upload everywhere
		return true;

	if( !system->HasWriteAccess(item) )
		return false;

return true;
}


bool Upload::HasAccess()
{
	if( request->is_item || !HasAccess(*request->dir_tab.back()) )
		return false;

return true;
}



bool Upload::UploadCreatePath()
{
	if( !system->MakePath(request->item, true) )
	{
		request->status = WINIX_ERR_PERMISSION_DENIED;
		return false;
	}

return true;
}




void Upload::UploadSaveFile(const std::string & tmp_filename, const std::string & destination)
{
	if( rename(tmp_filename.c_str(), destination.c_str()) == 0 )
	{	
		log << log1 << "Content: uploaded a new file: " << destination << logend;
	}
	else
	{
		int err = errno;

		// !! skasowac takze plik z bazy danych?
		log << log1 << "Content: can't move the tmp file from: " << tmp_filename << ", to: " << destination << ", ";
		log.SystemErr(err);
		log << logend;

		request->status = WINIX_ERR_PERMISSION_DENIED;
	}
}



bool Upload::FunUploadCheckAbuse()
{
	if( !system->rebus.CheckRebus() )
	{
		request->status = WINIX_ERR_INCORRECT_REBUS;
		return false;
	}

	functions->CheckGetPostTimes(4);

	if( request->session->spam_score > 0 )
	{
		request->status = WINIX_ERR_SPAM;
		log << log1 << "Content: ignoring due to suspected spamming" << logend;
		return false;
	}

return true;
}






void Upload::UploadMulti()
{
	request->item.Clear(); // clearing and setting date
	request->item.parent_id = request->dir_tab.back()->id;
	request->item.type = Item::file;
	request->item.privileges = 0644; // !! tymczasowo
	functions->SetUser(request->item);

	PostFileTab::iterator i = request->post_file_tab.begin();

	for( ; i != request->post_file_tab.end() ; ++i)
	{
		const char * file_name = i->second.filename.c_str();

		request->item.subject = file_name;
		request->item.url     = file_name;
		request->item.auth    = SelectFileType(file_name);

		system->PrepareUrl(request->item);
		request->status = system->AddFile(request->item);

		if(	!UploadCreatePath() )
			return;

		if( request->status == WINIX_ERR_OK )
		{
			UploadSaveFile(i->second.tmp_filename, request->item.auth_path);
			request->status = db->EditAuthById(request->item, request->item.id);
		}
	}

	system->RedirectToLastDir();
}


void Upload::UploadSingle()
{
	std::string * new_subject = request->PostVar("subject");
	std::string * new_url     = request->PostVar("url");
	bool has_subject = (new_subject && (*new_subject)[0] != 0 );
	bool has_url     = (new_url && (*new_url)[0] != 0 );

	functions->ReadItem(request->item, Item::file); // ReadItem() changes the url if it is empty
	functions->SetUser(request->item);
	request->item.privileges = 0644; // !! tymczasowo

	const char * file_name = request->post_file_tab.begin()->second.filename.c_str();
	request->item.auth = SelectFileType(file_name);

	if( !has_subject )
		request->item.subject = file_name;

	if( !has_url )
	{
		request->item.url = file_name;
		system->PrepareUrl(request->item);
	}
	
	request->status = system->AddFile(request->item);

	// url can be changed by PostFunEmacsAdd()
	if( !UploadCreatePath() )
		return;

	if( request->status == WINIX_ERR_OK )
	{
		const std::string & tmp_filename = request->post_file_tab.begin()->second.tmp_filename;
		UploadSaveFile(tmp_filename, request->item.auth_path);
		request->status = db->EditAuthById(request->item, request->item.id);
	}

	if( request->status == WINIX_ERR_OK )
		system->RedirectTo(request->item, "/cat");
}



// !! dodac usuwanie plikow statycznych przez rm
void Upload::MakePost()
{
	if( request->post_file_tab.empty() )
	{
		request->status = WINIX_ERR_PERMISSION_DENIED;
		return;
	}

	if( !FunUploadCheckAbuse() )
		return;

	if( request->post_file_tab.size() > 1 )
		UploadMulti();
	else
		UploadSingle();
}		





} // namespace