winix/core/request.h

/*
 * This file is a part of CMSLU -- Content Management System like Unix
 * and is not publicly distributed
 * 
 * Copyright (c) 2008-2009, Tomasz Sowa
 * All rights reserved.
 * 
 */
 
#ifndef headerfilecmslucorerequest
#define headerfilecmslucorerequest

#include <fcgiapp.h>
#include <sstream>
#include <vector>
#include <ctime>
#include <iomanip>

#include "requesttypes.h"
#include "session.h"
#include "item.h"
#include "error.h"
#include "function.h"
#include "thread.h"
#include "compress.h"



struct Request
{
	// request id
	// is incremented for each request and is never 0
	// (from -1 will be incremented twice)
	// it's used for some optimalization e.g. in templates
	size_t id;

	
    FCGX_Stream * in,  * out, * err;
    FCGX_ParamArray env; // defined as 'char **'


	enum Method { get, post, none } method;


	// headers, page and debug
	std::ostringstream headers, page, debug;

	
	GetTable    get_table;
	PostTable   post_table;
	CookieTable cookie_table;
	
	// environment variables
	// they are not null -- when the server doesn't have such a variable it will be pointing into 'char_empty' which is default '\0'
	const char * env_request_method;
	const char * env_request_uri;
	const char * env_http_cookie;
	const char * env_remote_addr;
	const char * env_http_host;
	const char * env_http_user_agent;

	// current session
	// is set after calling session_manager.SetSession()
	Session * session;

	
	// 'done_status' is set if 'done' is different than 'nothing'
	Error done_status; // !! wywalic - jest przeciez w session

	// what to do
	// !! wywalic?
	enum Result { err_internal, err404, err_per_denied, show_dir, show_item, show_item_by_id, add_item, edit_item, del_item, del_item_confirm, confirm, redirect, logout } result; // zamienic na to_do



	// !! nowe skladowe
	
	// current directory
	// !! zapewnic aby byl minimum jeden katalog (root)
	
	// !! moze nazwac to poprostu dir?
	std::vector<Item*> dir_table;

	bool is_item;
	
	// this item is used for many purposes such as editing, adding an item etc.
	Item item;

	// null if there is no a function
	Function * pfunction;	
	
	// !! moze nazwac to poprostu param?
	std::vector<std::string*> param_table;
	
	Error status;
	
	// ------------------ 	
	
	// !! stare skladowe
	// current directory e.g.  /foo/bar
	//std::vector<Item> cur_dir_table;
	// id of the last directory (bar) or -1
	//long dir;

	// ------------------

	// items in the current directory
	// maybe without contents?
	std::vector<Item> item_table;
	
	// directories in the current directory
	//std::vector<Item> dir_table2;

	// current thread (if exists)
	
	bool is_thread;
	Thread thread;

	std::vector<Thread> thread_tab;

	// this string is used for many purposes such as redirecting
	std::string str;

	// for debugging
	void PrintGetTable();
	void PrintEnv();
	void PrintIn();
		
	Request();
	void Clear();

	void Init();

	bool IsParam(const char * s);

	void SetCookie(const char * name, const char * value);
	void SetCookie(const char * name, long value);

	bool IsPostVar(const char * var);
	std::string & PostVar(const char * var);  // with a throw  !!! wywalic te wyjatki ztad, niech zwraca pusty string jak nie znajdzie nic, albo referencje na jakis statyczny pusty string
	//bool PostVar(const char * var, std::string & result);

	// item_table[0] -> item
	// !! to tez nie bedzie potrzebne
	void CopyFirstItem();


	void ReadEnvVariables();
	void CheckMethod();
	void ReadParameters();
	void Read();
	void SendAll();
	
	
	bool CanChangeUser(const Item & item, long new_user_id);
	bool CanChangeGroup(const Item & item, long new_group_id);
	bool CanChangePrivileges(const Item & item, int new_priv);
	
	bool HasAccess(const Item & item, int mask);
	bool HasReadAccess(const Item & item);
	bool HasWriteAccess(const Item & item);
	bool HasReadWriteAccess(const Item & item);
	bool HasReadExecAccess(const Item & item);

	bool CanCreateThread(bool check_root = false);
	bool CanRemove(const Item & item);
	bool CanUseEmacs(const Item & item, bool check_root = false);
	bool CanUseMkdir(const Item & item, bool check_root = false);
	
	bool CanUseHtml(long user_id);
	bool CanUseBBCode(long user_id);
	
private:
	// used to set some env_* variables into it, when the server didn't set that variable
	// it contains '\0'
	const char char_empty;
	
	const char * SetEnvVar(const char * var);
	
	void StandardLog();
	
	Compress compress;
	
};



extern Request request;



#endif