BGSkill to GuildSkill

[Scirey]

Hi rAthena,

I have this code taken from easycore's Extended Battleground

/*==========================================
* Guild Skill Usage for Guild Masters
*------------------------------------------*/
ACMD_FUNC(bgskill)
{
	int i, skillnum = 0, skilllv = 0;
	unsigned int tick = gettick();
	struct battleground_data *bgd;

	const struct { char skillstr[3]; int id; } skills[] = {
		{ "BO",	10010 },
		{ "RG",	10011 },
		{ "RS",	10012 },
		{ "EC",	10013 },
	};

	// Check for Skill ID
	for( i = 0; i < ARRAYLENGTH(skills); i++ )
	{
		if( strncmpi(message, skills[i].skillstr, 3) == 0 )
		{
			skillnum = skills[i].id;
			break;
		}
	}
	if( !skillnum )
	{
		clif_displaymessage(fd, "Invalid Skill string. Use @bgskill EC/RS/RG/BO");
		return -1;
	}

	if( !map_getmapflag(sd->bl.m, MF_BATTLEGROUND) )
	{
		clif_displaymessage(fd, "This command is only available for Battleground.");
		return -1;
	}
	else
	{
		if( (bgd = sd->bmaster_flag) != NULL )
		{
			if( bgd->skill_block_timer[skillnum] == INVALID_TIMER )
				skilllv = bg_checkskill(bgd, skillnum);
			else
			{
				bg_block_skill_status(bgd, skillnum);
				skilllv = 0;
			}
		}
		else
		{
			clif_displaymessage(fd, "This command is reserved for Team Leaders Only.");
			return -1;
		}
	}

	if( pc_cant_act(sd) || pc_issit(sd) || skill_isNotOk(skillnum, sd) || sd->ud.skilltimer != -1 || sd->sc.option&(OPTION_WEDDING|OPTION_XMAS|OPTION_SUMMER) || sd->state.only_walk || sd->sc.data[SC_BASILICA] )
		return -1;

	if( DIFF_TICK(tick, sd->ud.canact_tick) < 0 )
		return -1;

	if( sd->menuskill_id )
	{
		if( sd->menuskill_id == SA_TAMINGMONSTER )
			sd->menuskill_id = sd->menuskill_val = 0; //Cancel pet capture.
		else if( sd->menuskill_id != SA_AUTOSPELL )
			return -1; //Can't use skills while a menu is open.
	}

	sd->skillitem = sd->skillitemlv = 0;
	if( skilllv ) unit_skilluse_id(&sd->bl, sd->bl.id, skillnum, skilllv);
	return 0;
}

I would like to create another one with this function that enables the guild leader to use @guildskill EC/RS/RG/BO inside the castles.

Can anyone point out which changes should I made?

Thank you