/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
 *                       E-mail:
 *                <brain@chatspike.net>
 *                <Craig@chatspike.net>
 *
 * Written by Craig Edwards, Craig McLure, and others.
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

using namespace std;

#include "inspircd_config.h"
#include "inspircd.h"
#include "inspircd_io.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/errno.h>
#include <time.h>
#include <string>
#ifdef GCC3
#include <ext/hash_map>
#else
#include <hash_map>
#endif
#include <sstream>
#include <vector>
#include <deque>
#include <stdarg.h>
#include "connection.h"
#include "users.h"
#include "ctables.h"
#include "globals.h"
#include "modules.h"
#include "dynamic.h"
#include "wildcard.h"
#include "message.h"
#include "mode.h"
#include "xline.h"
#include "commands.h"
#include "inspstring.h"
#include "helperfuncs.h"
#include "hashcomp.h"
#include "typedefs.h"

extern int MODCOUNT;
extern std::vector<Module*> modules;
extern ServerConfig *Config;
extern InspIRCd* ServerInstance;
extern time_t TIME;
extern char lowermap[255];
static char list[MAXBUF];
extern userrec* fd_ref_table[MAX_DESCRIPTORS];
static char already_sent[MAX_DESCRIPTORS];
extern std::vector<userrec*> all_opers;
extern user_hash clientlist;
extern chan_hash chanlist;

extern std::vector<userrec*> local_users;

static char TIMESTR[26];
static time_t LAST = 0;

/** log()
 *  Write a line of text `text' to the logfile (and stdout, if in nofork) if the level `level'
 *  is greater than the configured loglevel.
 */
void log(int level, char *text, ...)
{
        va_list argsPtr;

	if (level < Config->LogLevel)
                return;

	char textbuffer[MAXBUF];
	if (TIME != LAST)
	{
		struct tm * timeinfo;
        	timeinfo = localtime(&TIME);
		strlcpy(TIMESTR,asctime(timeinfo),26);
		TIMESTR[24] = ':';
		LAST = TIME;
	}

        if (Config->log_file)
        {
                va_start (argsPtr, text);
                vsnprintf(textbuffer, MAXBUF, text, argsPtr);
                va_end(argsPtr);

		if (Config->log_file)
	                fprintf(Config->log_file,"%s %s\n",TIMESTR,textbuffer);
                if (Config->nofork)
                {
                        // nofork enabled? display it on terminal too
                        printf("%s %s\n",TIMESTR,textbuffer);
                }
        }
}

/** readfile()
 *  Read the contents of a file located by `fname' into a file_cache pointed at by `F'.
 *
 *  XXX - we may want to consider returning a file_cache or pointer to one, less confusing.
 */
void readfile(file_cache &F, const char* fname)
{
        FILE* file;
        char linebuf[MAXBUF];

        log(DEBUG,"readfile: loading %s",fname);
        F.clear();
        file =  fopen(fname,"r");
        if (file)
        {
                while (!feof(file))
                {
                        fgets(linebuf,sizeof(linebuf),file);
                        linebuf[strlen(linebuf)-1]='\0';
                        if (!*linebuf)
                        {
                                strcpy(linebuf,"  ");
                        }
                        if (!feof(file))
                        {
                                F.push_back(linebuf);
                        }
                }
                fclose(file);
        }
        else
        {
                log(DEBUG,"readfile: failed to load file: %s",fname);
        }
        log(DEBUG,"readfile: loaded %s, %lu lines",fname,(unsigned long)F.size());
}

/** Write_NoFormat()
 *  Writes a given string in `text' to the socket on fd `sock' - only if the socket
 *  is a valid entry in the local FD table.
 */
void Write_NoFormat(int sock, const char *text)
{
	if ((sock < 0) || (!text) || (sock > MAX_DESCRIPTORS))
		return;

	char tb[MAXBUF];
	int bytes = snprintf(tb,MAXBUF,"%s\r\n",text);
	chop(tb);
	if (fd_ref_table[sock])
	{
		if (Config->GetIOHook(fd_ref_table[sock]->port))
		{
			try
			{
				Config->GetIOHook(fd_ref_table[sock]->port)->OnRawSocketWrite(sock,tb,bytes);
			}
			catch (ModuleException& modexcept)
			{
				log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
			}
		}
		else
		{
			fd_ref_table[sock]->AddWriteBuf(tb);
		}
		ServerInstance->stats->statsSent += bytes;
	}
	else log(DEFAULT,"ERROR! attempted write to a user with no fd_ref_table entry!!!");
}

/** Write()
 *  Same as Write_NoFormat(), but formatted printf() style first.
 */
void Write(int sock, char *text, ...)
{
        if ((sock < 0) || (sock > MAX_DESCRIPTORS))
                return;
        if (!text)
        {
                log(DEFAULT,"*** BUG *** Write was given an invalid parameter");
                return;
        }
        va_list argsPtr;
	char textbuffer[MAXBUF],tb[MAXBUF];
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);
        int bytes = snprintf(tb,MAXBUF,"%s\r\n",textbuffer);
        chop(tb);
        if (fd_ref_table[sock])
        {
		if (Config->GetIOHook(fd_ref_table[sock]->port))
		{
			try
			{
				Config->GetIOHook(fd_ref_table[sock]->port)->OnRawSocketWrite(sock,tb,bytes);
			}
			catch (ModuleException& modexcept)
			{
				log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
			}						                
		}
		else
		{
	                fd_ref_table[sock]->AddWriteBuf(tb);
		}
		ServerInstance->stats->statsSent += bytes;
        }
        else log(DEFAULT,"ERROR! attempted write to a user with no fd_ref_table entry!!!");
}

/** WriteServ_NoFormat()
 *  Same as Write_NoFormat(), except prefixes `text' with `:server.name '.
 */
void WriteServ_NoFormat(int sock, const char* text)
{
	if ((sock < 0) || (!text) || (sock > MAX_DESCRIPTORS))
		return;
	char tb[MAXBUF];
	int bytes = snprintf(tb,MAXBUF,":%s %s\r\n",Config->ServerName,text);
	chop(tb);
	if (fd_ref_table[sock])
	{
		if (Config->GetIOHook(fd_ref_table[sock]->port))
		{
			try
			{
				Config->GetIOHook(fd_ref_table[sock]->port)->OnRawSocketWrite(sock,tb,bytes);
			}
                        catch (ModuleException& modexcept)
                        {
                                log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
                        }
		}
		else
		{
			fd_ref_table[sock]->AddWriteBuf(tb);
		}
		ServerInstance->stats->statsSent += bytes;
	}
	else log(DEFAULT,"ERROR! attempted write to a user with no fd_ref_table entry!!!");
}

/** WriteServ()
 *  Same as Write(), except `text' is prefixed with `:server.name '.
 */
void WriteServ(int sock, char* text, ...)
{
        if ((sock < 0) || (sock > MAX_DESCRIPTORS))
                return;
        if (!text)
        {
                log(DEFAULT,"*** BUG *** WriteServ was given an invalid parameter");
                return;
        }
        va_list argsPtr;
        va_start (argsPtr, text);
	char textbuffer[MAXBUF],tb[MAXBUF];
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);
        int bytes = snprintf(tb,MAXBUF,":%s %s\r\n",Config->ServerName,textbuffer);
        chop(tb);
        if (fd_ref_table[sock])
        {
		if (Config->GetIOHook(fd_ref_table[sock]->port))
		{
			try
			{
				Config->GetIOHook(fd_ref_table[sock]->port)->OnRawSocketWrite(sock,tb,bytes);
			}
                        catch (ModuleException& modexcept)
                        {
                                log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
                        }
		}
		else
		{
	                fd_ref_table[sock]->AddWriteBuf(tb);
		}
                ServerInstance->stats->statsSent += bytes;
        }
        else log(DEFAULT,"ERROR! attempted write to a user with no fd_ref_table entry!!!");
}

/** WriteFrom_NoFormat()
 * Write `text' to a socket with fd `sock' prefixed with `:n!u@h' - taken from
 * the nick, user, and host of `user'.
 */
void WriteFrom_NoFormat(int sock, userrec *user, const char* text)
{
	if ((sock < 0) || (!text) || (!user) || (sock > MAX_DESCRIPTORS))
		return;
	char tb[MAXBUF];
	int bytes = snprintf(tb,MAXBUF,":%s %s\r\n",user->GetFullHost(),text);
	chop(tb);
	if (fd_ref_table[sock])
	{
		if (Config->GetIOHook(fd_ref_table[sock]->port))
		{
			try
			{
				Config->GetIOHook(fd_ref_table[sock]->port)->OnRawSocketWrite(sock,tb,bytes);
			}
                        catch (ModuleException& modexcept)
                        {
                                log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
                        }
		}
		else
		{
			fd_ref_table[sock]->AddWriteBuf(tb);
		}
		ServerInstance->stats->statsSent += bytes;
	}
	else log(DEFAULT,"ERROR! attempted write to a user with no fd_ref_table entry!!!");
}

/* write text from an originating user to originating user */

void WriteFrom(int sock, userrec *user,char* text, ...)
{
        if ((sock < 0) || (sock > MAX_DESCRIPTORS))
                return;
        if ((!text) || (!user))
        {
                log(DEFAULT,"*** BUG *** WriteFrom was given an invalid parameter");
                return;
        }
        va_list argsPtr;
        va_start (argsPtr, text);
	char textbuffer[MAXBUF],tb[MAXBUF];
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);
        int bytes = snprintf(tb,MAXBUF,":%s %s\r\n",user->GetFullHost(),textbuffer);
        chop(tb);
        if (fd_ref_table[sock])
        {
		if (Config->GetIOHook(fd_ref_table[sock]->port))
		{
			try
			{
				Config->GetIOHook(fd_ref_table[sock]->port)->OnRawSocketWrite(sock,tb,bytes);
			}
                        catch (ModuleException& modexcept)
                        {
                                log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
                        }
		}
		else
		{
	                fd_ref_table[sock]->AddWriteBuf(tb);
		}
                ServerInstance->stats->statsSent += bytes;
        }
        else log(DEFAULT,"ERROR! attempted write to a user with no fd_ref_table entry!!!");
}

/* write text to an destination user from a source user (e.g. user privmsg) */

void WriteTo(userrec *source, userrec *dest,char *data, ...)
{
        if ((!dest) || (!data))
        {
                log(DEFAULT,"*** BUG *** WriteTo was given an invalid parameter");
                return;
        }
        if (!IS_LOCAL(dest))
                return;
	char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, data);
        vsnprintf(textbuffer, MAXBUF, data, argsPtr);
        va_end(argsPtr);
        chop(textbuffer);

        // if no source given send it from the server.
        if (!source)
        {
                WriteServ_NoFormat(dest->fd,textbuffer);
        }
        else
        {
                WriteFrom_NoFormat(dest->fd,source,textbuffer);
        }
}

void WriteTo_NoFormat(userrec *source, userrec *dest, const char *data)
{
	if ((!dest) || (!data))
		return;
	if (!source)
	{
		WriteServ_NoFormat(dest->fd,data);
	}
	else
	{
		WriteFrom_NoFormat(dest->fd,source,data);
	}
}

/* write formatted text from a source user to all users on a channel
 * including the sender (NOT for privmsg, notice etc!) */

void WriteChannel(chanrec* Ptr, userrec* user, char* text, ...)
{
        if ((!Ptr) || (!user) || (!text))
        {
                log(DEFAULT,"*** BUG *** WriteChannel was given an invalid parameter");
                return;
        }
        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

        std::map<char*,char*> *ulist= Ptr->GetUsers();
	for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if (otheruser->fd != FD_MAGIC_NUMBER)
                        WriteTo_NoFormat(user,otheruser,textbuffer);
        }
}

void WriteChannel_NoFormat(chanrec* Ptr, userrec* user, const char* text)
{
        if ((!Ptr) || (!user) || (!text))
        {
                log(DEFAULT,"*** BUG *** WriteChannel was given an invalid parameter");
                return;
        }
        std::map<char*,char*> *ulist= Ptr->GetUsers();
        for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if (otheruser->fd != FD_MAGIC_NUMBER)
                        WriteTo_NoFormat(user,otheruser,text);
        }
}


/* write formatted text from a source user to all users on a channel
 * including the sender (NOT for privmsg, notice etc!) doesnt send to
 * users on remote servers */

void WriteChannelLocal(chanrec* Ptr, userrec* user, char* text, ...)
{
        if ((!Ptr) || (!text))
        {
                log(DEFAULT,"*** BUG *** WriteChannel was given an invalid parameter");
                return;
        }
        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

        std::map<char*,char*> *ulist= Ptr->GetUsers();
	for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if ((otheruser->fd != FD_MAGIC_NUMBER) && (otheruser != user))
                {
                        if (!user)
                        {
                                WriteServ_NoFormat(otheruser->fd,textbuffer);
                        }
                        else
                        {
                                WriteTo_NoFormat(user,otheruser,textbuffer);
                        }
                }
        }
}

void WriteChannelLocal_NoFormat(chanrec* Ptr, userrec* user, const char* text)
{
        if ((!Ptr) || (!text))
        {
                log(DEFAULT,"*** BUG *** WriteChannel was given an invalid parameter");
                return;
        }
        std::map<char*,char*> *ulist= Ptr->GetUsers();
        for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if ((otheruser->fd != FD_MAGIC_NUMBER) && (otheruser != user))
                {
                        if (!user)
                        {
                                WriteServ_NoFormat(otheruser->fd,text);
                        }
                        else
                        {
                                WriteTo_NoFormat(user,otheruser,text);
                        }
                }
        }
}



void WriteChannelWithServ(char* ServName, chanrec* Ptr, char* text, ...)
{
        if ((!Ptr) || (!text))
        {
                log(DEFAULT,"*** BUG *** WriteChannelWithServ was given an invalid parameter");
                return;
        }
        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);


        std::map<char*,char*> *ulist= Ptr->GetUsers();
	for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if (IS_LOCAL(otheruser))
                        WriteServ_NoFormat(otheruser->fd,textbuffer);
        }
}

void WriteChannelWithServ_NoFormat(char* ServName, chanrec* Ptr, const char* text)
{
        if ((!Ptr) || (!text))
        {
                log(DEFAULT,"*** BUG *** WriteChannelWithServ was given an invalid parameter");
                return;
        }
        std::map<char*,char*> *ulist= Ptr->GetUsers();
        for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if (IS_LOCAL(otheruser))
                        WriteServ_NoFormat(otheruser->fd,text);
        }
}



/* write formatted text from a source user to all users on a channel except
 * for the sender (for privmsg etc) */

void ChanExceptSender(chanrec* Ptr, userrec* user, char status, char* text, ...)
{
        if ((!Ptr) || (!user) || (!text))
        {
                log(DEFAULT,"*** BUG *** ChanExceptSender was given an invalid parameter");
                return;
        }
        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

        std::map<char*,char*> *ulist;
	switch (status)
	{
		case '@':
			ulist = Ptr->GetOppedUsers();
		break;
		case '%':
			ulist = Ptr->GetHalfoppedUsers();
		break;
		case '+':
			ulist = Ptr->GetVoicedUsers();
		break;
		default:
			ulist = Ptr->GetUsers();
		break;
	}
	log(DEBUG,"%d users to write to",ulist->size());
	for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if ((IS_LOCAL(otheruser)) && (user != otheruser))
                        WriteFrom_NoFormat(otheruser->fd,user,textbuffer);
        }
}

void ChanExceptSender_NoFormat(chanrec* Ptr, userrec* user, char status, const char* text)
{
        if ((!Ptr) || (!user) || (!text))
        {
                log(DEFAULT,"*** BUG *** ChanExceptSender was given an invalid parameter");
                return;
        }
        std::map<char*,char*> *ulist;
        switch (status)
        {
                case '@':
                        ulist = Ptr->GetOppedUsers();
                break;  
                case '%':
                        ulist = Ptr->GetHalfoppedUsers();
                break;
                case '+':
                        ulist = Ptr->GetVoicedUsers();
                break;
                default:
	                ulist = Ptr->GetUsers();
		break;
        }
        for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if ((IS_LOCAL(otheruser)) && (user != otheruser))
                        WriteFrom_NoFormat(otheruser->fd,user,text);
        }
}

std::string GetServerDescription(char* servername)
{
	std::string description = "";
	FOREACH_MOD(I_OnGetServerDescription,OnGetServerDescription(servername,description));
	if (description != "")
	{
		return description;
	}
	else
	{
		return Config->ServerDesc; // not a remote server that can be found, it must be me.
	}
}

/* write a formatted string to all users who share at least one common
 * channel, including the source user e.g. for use in NICK */

void WriteCommon(userrec *u, char* text, ...)
{
        if (!u)
        {
                log(DEFAULT,"*** BUG *** WriteCommon was given an invalid parameter");
                return;
        }

        if (u->registered != 7) {
                log(DEFAULT,"*** BUG *** WriteCommon on an unregistered user");
                return;
        }

        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

        // FIX: Stops a message going to the same person more than once
        memset(&already_sent,0,MAX_DESCRIPTORS);

        bool sent_to_at_least_one = false;

	unsigned int y = u->chans.size();
        for (unsigned int i = 0; i < y; i++)
        {
                if (u->chans[i].channel)
                {
                        std::map<char*,char*> *ulist= u->chans[i].channel->GetUsers();
			for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
                        {
                                char* o = i->second;
                                userrec* otheruser = (userrec*)o;
                                if ((otheruser->fd > -1) && (!already_sent[otheruser->fd]))
                                {
                                        already_sent[otheruser->fd] = 1;
                                        WriteFrom_NoFormat(otheruser->fd,u,textbuffer);
                                        sent_to_at_least_one = true;
                                }
                        }
                }
        }
        // if the user was not in any channels, no users will receive the text. Make sure the user
        // receives their OWN message for WriteCommon
        if (!sent_to_at_least_one)
        {
                WriteFrom_NoFormat(u->fd,u,textbuffer);
        }
}

void WriteCommon_NoFormat(userrec *u, const char* text)
{
        if (!u)
        {
                log(DEFAULT,"*** BUG *** WriteCommon was given an invalid parameter");
                return;
        }
                
        if (u->registered != 7) {
                log(DEFAULT,"*** BUG *** WriteCommon on an unregistered user");
                return;
        }
        // FIX: Stops a message going to the same person more than once
        memset(&already_sent,0,MAX_DESCRIPTORS);
                
        bool sent_to_at_least_one = false;
                        
        unsigned int y = u->chans.size();
        for (unsigned int i = 0; i < y; i++)
        {
                if (u->chans[i].channel)
                {
                        std::map<char*,char*> *ulist= u->chans[i].channel->GetUsers();
                        for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
                        {
                                char* o = i->second;
                                userrec* otheruser = (userrec*)o;
                                if ((otheruser->fd > -1) && (!already_sent[otheruser->fd]))
                                {
                                        already_sent[otheruser->fd] = 1;
                                        WriteFrom_NoFormat(otheruser->fd,u,text);
                                        sent_to_at_least_one = true;
                                }
                        }
                }
        }
        // if the user was not in any channels, no users will receive the text. Make sure the user
        // receives their OWN message for WriteCommon
        if (!sent_to_at_least_one)
        {
                WriteFrom_NoFormat(u->fd,u,text);
        }
}


/* write a formatted string to all users who share at least one common
 * channel, NOT including the source user e.g. for use in QUIT */

void WriteCommonExcept(userrec *u, char* text, ...)
{
        if (!u)
        {
                log(DEFAULT,"*** BUG *** WriteCommon was given an invalid parameter");
                return;
        }

        if (u->registered != 7) {
                log(DEFAULT,"*** BUG *** WriteCommon on an unregistered user");
                return;
        }

        char textbuffer[MAXBUF];
	char oper_quit[MAXBUF];
	bool quit_munge = false;

        va_list argsPtr;
        va_start (argsPtr, text);
        int total = vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

	if ((Config->HideSplits) && (total > 6))
	{
		/* Yeah yeah, this is ugly. But its fast, live with it. */
		char* check = textbuffer;
		if ((*check++ == 'Q') && (*check++ == 'U') && (*check++ == 'I') && (*check++ == 'T') && (*check++ == ' ') && (*check++ == ':'))
		{
			std::stringstream split(check);
			std::string server_one;
			std::string server_two;
			split >> server_one;
			split >> server_two;
			if ((FindServerName(server_one)) && (FindServerName(server_two)))
			{
				strlcpy(oper_quit,textbuffer,MAXQUIT);
				strlcpy(check,"*.net *.split",MAXQUIT);
				quit_munge = true;
			}
		}
	}
	if ((Config->HideBans) && (total > 13) && (!quit_munge))
	{
		char* check = textbuffer;
		if ((*check++ == 'Q') && (*check++ == 'U') && (*check++ == 'I') && (*check++ == 'T') && (*check++ == ' ') && (*check++ == ':'))
		{
			check++;
			if ((*check++ == '-') && (*check++ == 'L') && (*check++ == 'i') && (*check++ == 'n') && (*check++ == 'e') && (*check++ == 'd') && (*check++ == ':'))
			{
				strlcpy(oper_quit,textbuffer,MAXQUIT);
				*(--check) = 0;		// We don't need to strlcpy, we just chop it from the :
				quit_munge = true;
			}
		}
	}

        memset(&already_sent,0,MAX_DESCRIPTORS);

	unsigned int y = u->chans.size();
        for (unsigned int i = 0; i < y; i++)
        {
                if (u->chans[i].channel)
                {
                        std::map<char*,char*> *ulist= u->chans[i].channel->GetUsers();
			for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
                        {
                                char* o = i->second;
                                userrec* otheruser = (userrec*)o;
                                if (u != otheruser)
                                {
                                        if ((otheruser->fd > -1) && (!already_sent[otheruser->fd]))
                                        {
                                                already_sent[otheruser->fd] = 1;
						if (quit_munge)
						{
							WriteFrom_NoFormat(otheruser->fd,u,*otheruser->oper ? oper_quit : textbuffer);
						}
						else WriteFrom_NoFormat(otheruser->fd,u,textbuffer);
                                        }
                                }
                        }
                }
        }
}

void WriteCommonExcept_NoFormat(userrec *u, const char* text)
{
        if (!u)
        {
                log(DEFAULT,"*** BUG *** WriteCommon was given an invalid parameter");
                return;
        }
         
        if (u->registered != 7) {
                log(DEFAULT,"*** BUG *** WriteCommon on an unregistered user");
                return;
        }

        memset(&already_sent,0,MAX_DESCRIPTORS);

        unsigned int y = u->chans.size();
        for (unsigned int i = 0; i < y; i++)
        {
                if (u->chans[i].channel)
                {
                        std::map<char*,char*> *ulist= u->chans[i].channel->GetUsers();
                        for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
                        {
                                char* o = i->second;
                                userrec* otheruser = (userrec*)o;
                                if (u != otheruser)
                                {
                                        if ((otheruser->fd > -1) && (!already_sent[otheruser->fd]))
                                        {
                                                already_sent[otheruser->fd] = 1;
                                                WriteFrom_NoFormat(otheruser->fd,u,text);
                                        }
                                }
                        }
                }
        }
}



void WriteOpers(char* text, ...)
{
        if (!text)
        {
                log(DEFAULT,"*** BUG *** WriteOpers was given an invalid parameter");
                return;
        }

        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

        for (std::vector<userrec*>::iterator i = all_opers.begin(); i != all_opers.end(); i++)
        {
                userrec* a = *i;
                if (IS_LOCAL(a))
                {
                        if (strchr(a->modes,'s'))
                        {
                                // send server notices to all with +s
                                WriteServ(a->fd,"NOTICE %s :%s",a->nick,textbuffer);
                        }
                }
        }
}

void ServerNoticeAll(char* text, ...)
{
	if (!text)
		return;

	char textbuffer[MAXBUF];
	va_list argsPtr;
	va_start (argsPtr, text);
	vsnprintf(textbuffer, MAXBUF, text, argsPtr);
	va_end(argsPtr);

	for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
	{
		userrec* t = (userrec*)(*i);
		WriteServ(t->fd,"NOTICE $%s :%s",Config->ServerName,textbuffer);
	}
}

void ServerPrivmsgAll(char* text, ...)
{
	if (!text)
		return;

	char textbuffer[MAXBUF];
	va_list argsPtr;
	va_start (argsPtr, text);
	vsnprintf(textbuffer, MAXBUF, text, argsPtr);
	va_end(argsPtr);

	for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
	{
		userrec* t = (userrec*)(*i);
		WriteServ(t->fd,"PRIVMSG $%s :%s",Config->ServerName,textbuffer);
	}
}

void WriteMode(const char* modes, int flags, const char* text, ...)
{
        if ((!text) || (!modes) || (!flags))
        {
                log(DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
                return;
        }

        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);
        int modelen = strlen(modes);

        for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
        {
		userrec* t = (userrec*)(*i);
                bool send_to_user = false;
                if (flags == WM_AND)
                {
                        send_to_user = true;
                        for (int n = 0; n < modelen; n++)
                        {
                                if (!hasumode(t,modes[n]))
                                {
                                        send_to_user = false;
                                        break;
                                }
                        }
                }
                else if (flags == WM_OR)
                {
                        send_to_user = false;
                        for (int n = 0; n < modelen; n++)
                        {
                                if (hasumode(t,modes[n]))
                                {
                                        send_to_user = true;
                                        break;
                                }
                        }
                }
                if (send_to_user)
                {
                        WriteServ(t->fd,"NOTICE %s :%s",t->nick,textbuffer);
                }
        }
}

void NoticeAll(userrec *source, bool local_only, char* text, ...)
{
        if ((!text) || (!source))
        {
                log(DEFAULT,"*** BUG *** NoticeAll was given an invalid parameter");
                return;
        }

        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

        for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
        {
                userrec* t = (userrec*)(*i);
                WriteFrom(t->fd,source,"NOTICE $* :%s",textbuffer);
        }

}


void WriteWallOps(userrec *source, bool local_only, char* text, ...)
{
        if ((!text) || (!source))
        {
                log(DEFAULT,"*** BUG *** WriteOpers was given an invalid parameter");
                return;
        }

        char textbuffer[MAXBUF];
        va_list argsPtr;
        va_start (argsPtr, text);
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);

        for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
        {
		userrec* t = (userrec*)(*i);
                if ((IS_LOCAL(t)) && (strchr(t->modes,'w')))
                {
                        WriteTo(source,t,"WALLOPS :%s",textbuffer);
                }
        }
}

/* convert a string to lowercase. Note following special circumstances
 * taken from RFC 1459. Many "official" server branches still hold to this
 * rule so i will too;
 *
 *  Because of IRC's scandanavian origin, the characters {}| are
 *  considered to be the lower case equivalents of the characters []\,
 *  respectively. This is a critical issue when determining the
 *  equivalence of two nicknames.
 */

void strlower(char *n)
{
        if (n)
        {
                for (char* t = n; *t; t++)
                        *t = lowermap[(unsigned)*t];
        }
}

/* Find a user record by nickname and return a pointer to it */

userrec* Find(std::string nick)
{
        user_hash::iterator iter = clientlist.find(nick);

        if (iter == clientlist.end())
                /* Couldn't find it */
                return NULL;

        return iter->second;
}

userrec* Find(const char* nick)
{
	if (!nick)
		return NULL;
	user_hash::iterator iter = clientlist.find(nick);
	
	if (iter == clientlist.end())
		return NULL;

	return iter->second;
}

/* find a channel record by channel name and return a pointer to it */

chanrec* FindChan(const char* chan)
{
        if (!chan)
        {
                log(DEFAULT,"*** BUG *** Findchan was given an invalid parameter");
                return NULL;
        }

        chan_hash::iterator iter = chanlist.find(chan);

        if (iter == chanlist.end())
                /* Couldn't find it */
                return NULL;

        return iter->second;
}


long GetMaxBans(char* name)
{
	for (std::map<std::string,int>::iterator n = Config->maxbans.begin(); n != Config->MaxBans.end(); n++)
	{
		if (match(name,n->first->c_str()))
			return atoi(n->second);
	}
	return 64;
}

void purge_empty_chans(userrec* u)
{

        int purge = 0;

        // firstly decrement the count on each channel
        for (unsigned int f = 0; f < u->chans.size(); f++)
        {
                if (u->chans[f].channel)
                {
                        u->chans[f].channel->DelUser((char*)u);
                }
        }

        for (unsigned int i = 0; i < u->chans.size(); i++)
        {
                if (u->chans[i].channel)
                {
                        if (!usercount(u->chans[i].channel))
                        {
                                chan_hash::iterator i2 = chanlist.find(u->chans[i].channel->name);
                                /* kill the record */
                                if (i2 != chanlist.end())
                                {
                                        log(DEBUG,"del_channel: destroyed: %s",i2->second->name);
                                        if (i2->second)
					{
						FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
                                                delete i2->second;
					}
                                        chanlist.erase(i2);
                                        purge++;
                                        u->chans[i].channel = NULL;
                                }
                        }
                        else
                        {
                                log(DEBUG,"skipped purge for %s",u->chans[i].channel->name);
                        }
                }
        }
        log(DEBUG,"completed channel purge, killed %lu",(unsigned long)purge);

        DeleteOper(u);
}


char* chanmodes(chanrec *chan, bool showkey)
{
	static char scratch[MAXBUF];
	static char sparam[MAXBUF];
	char* offset = scratch;

        if (!chan)
        {
                log(DEFAULT,"*** BUG *** chanmodes was given an invalid parameter");
                *scratch = '\0';
                return scratch;
        }

        *scratch = '\0';
        *sparam = '\0';
        if (chan->binarymodes & CM_NOEXTERNAL)
		*offset++ = 'n';
        if (chan->binarymodes & CM_TOPICLOCK)
		*offset++ = 't';
        if (*chan->key)
		*offset++ = 'k';
        if (chan->limit)
		*offset++ = 'l';
        if (chan->binarymodes & CM_INVITEONLY)
		*offset++ = 'i';
        if (chan->binarymodes & CM_MODERATED)
		*offset++ = 'm';
        if (chan->binarymodes & CM_SECRET)
		*offset++ = 's';
        if (chan->binarymodes & CM_PRIVATE)
                *offset++ = 'p';
        if (*chan->key)
	{
		snprintf(sparam,MAXBUF," %s",showkey ? chan->key : "<key>");
	}
        if (chan->limit)
        {
                char foo[24];
                sprintf(foo," %lu",(unsigned long)chan->limit);
                strlcat(sparam,foo,MAXBUF);
        }
        if (*chan->custom_modes)
        {
		for (char* t = chan->custom_modes; *t; t++)
	                *offset++ = *t;
                for (int z = 0; chan->custom_modes[z]; z++)
                {
                        std::string extparam = chan->GetModeParameter(chan->custom_modes[z]);
                        if (extparam != "")
                        {
                                charlcat(sparam,' ',MAXBUF);
                                strlcat(sparam,extparam.c_str(),MAXBUF);
                        }
                }
        }
	/* Null terminate scratch */
	*offset = '\0';
        strlcat(scratch,sparam,MAXMODES);
        return scratch;
}


/* compile a userlist of a channel into a string, each nick seperated by
 * spaces and op, voice etc status shown as @ and + */

void userlist(userrec *user,chanrec *c)
{
        if ((!c) || (!user))
        {
                log(DEFAULT,"*** BUG *** userlist was given an invalid parameter");
                return;
        }

        snprintf(list,MAXBUF,"353 %s = %s :", user->nick, c->name);

        std::map<char*,char*> *ulist= c->GetUsers();
        for (std::map<char*,char*>::iterator i = ulist->begin(); i != ulist->end(); i++)
        {
                char* o = i->second;
                userrec* otheruser = (userrec*)o;
                if ((!has_channel(user,c)) && (strchr(otheruser->modes,'i')))
                {
                        /* user is +i, and source not on the channel, does not show
                         * nick in NAMES list */
                        continue;
                }
                strlcat(list,cmode(otheruser,c),MAXBUF);
                strlcat(list,otheruser->nick,MAXBUF);
                charlcat(list,' ',MAXBUF);
                if (strlen(list)>(480-NICKMAX))
                {
                        /* list overflowed into
                         * multiple numerics */
                        WriteServ_NoFormat(user->fd,list);
                        snprintf(list,MAXBUF,"353 %s = %s :", user->nick, c->name);
                }
        }
        /* if whats left in the list isnt empty, send it */
        if (list[strlen(list)-1] != ':')
        {
                WriteServ_NoFormat(user->fd,list);
        }
}

/* return a count of the users on a specific channel accounting for
 * invisible users who won't increase the count. e.g. for /LIST */

int usercount_i(chanrec *c)
{
        int count = 0;

        if (!c)
        {
                log(DEFAULT,"*** BUG *** usercount_i was given an invalid parameter");
                return 0;
        }

        for (user_hash::const_iterator i = clientlist.begin(); i != clientlist.end(); i++)
        {
                        if (has_channel(i->second,c))
                        {
                                if (i->second->registered == 7)
                                {
                                        if ((!has_channel(i->second,c)) && (strchr(i->second->modes,'i')))
                                        {
                                                /* user is +i, and source not on the channel, does not show
                                                 * nick in NAMES list */
                                                continue;
                                        }
                                        count++;
                                }
                        }
        }
        log(DEBUG,"usercount_i: %s %lu",c->name,(unsigned long)count);
        return count;
}


int usercount(chanrec *c)
{
        return (c ? c->GetUserCounter() : 0);
}


// looks up a users password for their connection class (<ALLOW>/<DENY> tags)

ConnectClass GetClass(userrec *user)
{
        for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
        {
                if (match(user->host,i->host.c_str()))
                {
                        return *i;
                }
        }
        return *(Config->Classes.begin());
}

/* sends out an error notice to all connected clients (not to be used
 * lightly!) */

void send_error(char *s)
{
        log(DEBUG,"send_error: %s",s);
        for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
        {
		userrec* t = (userrec*)(*i);
		if (t->registered == 7)
                {
       	                WriteServ(t->fd,"NOTICE %s :%s",t->nick,s);
       	        }
                else
                {
                        // fix - unregistered connections receive ERROR, not NOTICE
                        Write(t->fd,"ERROR :%s",s);
                }
        }
}

void Error(int status)
{
        signal (SIGALRM, SIG_IGN);
        signal (SIGPIPE, SIG_IGN);
        signal (SIGTERM, SIG_IGN);
        signal (SIGABRT, SIG_IGN);
        signal (SIGSEGV, SIG_IGN);
        signal (SIGURG, SIG_IGN);
        signal (SIGKILL, SIG_IGN);
        log(DEFAULT,"*** fell down a pothole in the road to perfection ***");
        send_error("Error! Segmentation fault! save meeeeeeeeeeeeee *splat!*");
        Exit(status);
}

// this function counts all users connected, wether they are registered or NOT.
int usercnt(void)
{
        return clientlist.size();
}

// this counts only registered users, so that the percentages in /MAP don't mess up when users are sitting in an unregistered state
int registered_usercount(void)
{
        int c = 0;
        for (user_hash::const_iterator i = clientlist.begin(); i != clientlist.end(); i++)
        {
                if (i->second->registered == 7) c++;
        }
        return c;
}

int usercount_invisible(void)
{
        int c = 0;
        for (user_hash::const_iterator i = clientlist.begin(); i != clientlist.end(); i++)
        {
                if ((i->second->registered == 7) && (strchr(i->second->modes,'i'))) c++;
        }
        return c;
}

int usercount_opers(void)
{
	int c = 0;
	for (user_hash::const_iterator i = clientlist.begin(); i != clientlist.end(); i++)
		if (*i->second->oper) c++;
        return c;
}

int usercount_unknown(void)
{
        int c = 0;
        for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
        {
		userrec* t = (userrec*)(*i);
                if (t->registered != 7)
                        c++;
        }
        return c;
}

long chancount(void)
{
        return chanlist.size();
}

long local_count()
{
        int c = 0;
        for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
        {
		userrec* t = (userrec*)(*i);
                if (t->registered == 7) c++;
        }
        return c;
}

void ShowMOTD(userrec *user)
{
        static char mbuf[MAXBUF];
	static char crud[MAXBUF];
        std::string WholeMOTD = "";
        if (!Config->MOTD.size())
        {
                WriteServ(user->fd,"422 %s :Message of the day file is missing.",user->nick);
                return;
        }
	snprintf(crud,MAXBUF,":%s 372 %s :- ", Config->ServerName, user->nick);
        snprintf(mbuf,MAXBUF,":%s 375 %s :- %s message of the day\r\n", Config->ServerName, user->nick, Config->ServerName);
        WholeMOTD = WholeMOTD + mbuf;
        for (unsigned int i = 0; i < Config->MOTD.size(); i++)
                WholeMOTD = WholeMOTD + std::string(crud) + Config->MOTD[i].c_str() + std::string("\r\n");
        snprintf(mbuf,MAXBUF,":%s 376 %s :End of message of the day.\r\n", Config->ServerName, user->nick);
        WholeMOTD = WholeMOTD + mbuf;
        // only one write operation
	if (Config->GetIOHook(user->port))
	{
		try
		{
			Config->GetIOHook(user->port)->OnRawSocketWrite(user->fd,(char*)WholeMOTD.c_str(),WholeMOTD.length());
		}
                catch (ModuleException& modexcept)
                {
                        log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
                }

	}
	else
	{
        	user->AddWriteBuf(WholeMOTD);
	}
        ServerInstance->stats->statsSent += WholeMOTD.length();
}

void ShowRULES(userrec *user)
{
        if (!Config->RULES.size())
        {
                WriteServ(user->fd,"NOTICE %s :Rules file is missing.",user->nick);
                return;
        }
        WriteServ(user->fd,"NOTICE %s :%s rules",user->nick,Config->ServerName);
        for (unsigned int i = 0; i < Config->RULES.size(); i++)
                WriteServ(user->fd,"NOTICE %s :%s",user->nick,Config->RULES[i].c_str());
        WriteServ(user->fd,"NOTICE %s :End of %s rules.",user->nick,Config->ServerName);
}

// this returns 1 when all modules are satisfied that the user should be allowed onto the irc server
// (until this returns true, a user will block in the waiting state, waiting to connect up to the
// registration timeout maximum seconds)
bool AllModulesReportReady(userrec* user)
{
	if (!Config->global_implementation[I_OnCheckReady])
		return true;
        for (int i = 0; i <= MODCOUNT; i++)
        {
		if (Config->implement_lists[i][I_OnCheckReady])
		{
			int res = modules[i]->OnCheckReady(user);
			if (!res)
	                        return false;
		}
        }
        return true;
}

bool DirValid(char* dirandfile)
{
        char work[MAXBUF];
	char buffer[MAXBUF], otherdir[MAXBUF];
        strlcpy(work,dirandfile,MAXBUF);
        int p = strlen(work);
        // we just want the dir
        while (*work)
        {
                if (work[p] == '/')
                {
                        work[p] = '\0';
                        break;
                }
                work[p--] = '\0';
        }
        // Get the current working directory
        if( getcwd( buffer, MAXBUF ) == NULL )
                return false;
        chdir(work);
        if( getcwd( otherdir, MAXBUF ) == NULL )
                return false;
        chdir(buffer);
        if (strlen(otherdir) >= strlen(work))
        {
                otherdir[strlen(work)] = '\0';
                if (!strcmp(otherdir,work))
                {
                        return true;
                }
                return false;
        }
        else return false;
}

std::string GetFullProgDir(char** argv, int argc)
{
        char work[MAXBUF];
	char buffer[MAXBUF], otherdir[MAXBUF];
        strlcpy(work,argv[0],MAXBUF);
        int p = strlen(work);
        // we just want the dir
        while (*work)
        {
                if (work[p] == '/')
                {
                        work[p] = '\0';
                        break;
                }
                work[p--] = '\0';
        }
        // Get the current working directory
        if( getcwd( buffer, MAXBUF ) == NULL )
                return "";
        chdir(work);
        if( getcwd( otherdir, MAXBUF ) == NULL )
                return "";
        chdir(buffer);
        return otherdir;
}

int InsertMode(std::string &output, const char* mode, unsigned short section)
{
	unsigned short currsection = 1;
	unsigned int pos = output.find("CHANMODES=", 0) + 10; // +10 for the length of "CHANMODES="
	
	if(section > 4 || section == 0)
	{
		log(DEBUG, "InsertMode: CHANMODES doesn't have a section %dh :/", section);
		return 0;
	}
	
	for(; pos < output.size(); pos++)
	{
		if(section == currsection)
			break;
			
		if(output[pos] == ',')
			currsection++;
	}
	
	output.insert(pos, mode);
	return 1;
}

bool IsValidChannelName(const char *chname)
{
		char *c;

		/* check for no name - don't check for !*chname, as if it is empty, it won't be '#'! */
		if (!chname || *chname != '#')
		{
				return false;
		}

		c = (char *)chname + 1;
		while (*c)
		{
				switch (*c)
				{
						case ' ':
						case ',':
						case 7:
								return false;
				}

				c++;
		}
		
		/* too long a name - note funky pointer arithmetic here. */
		if ((c - chname) > CHANMAX)
		{
				return false;
		}

		return true;
}

inline int charlcat(char* x,char y,int z)
{
        char* x__n = x;
        int v = 0;
        while(*x__n++)
                v++;
        if (v < z - 1)
        {
                *--x__n = y;
                *++x__n = 0;
        }
	return v;
}

bool charremove(char* mp, char remove)
{
	char* mptr = mp;
        bool shift_down = false;
        while (*mptr)
        {
                if (*mptr == remove)
                        shift_down = true;
                if (shift_down)
                        *mptr = *(mptr+1);
                *mptr++;
        }
	return shift_down;
}