path: root/src/map/guild.c

// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder

#include "../common/cbasetypes.h"
#include "../common/timer.h"
#include "../common/nullpo.h"
#include "../common/malloc.h"
#include "../common/mapindex.h"
#include "../common/showmsg.h"
#include "../common/ers.h"
#include "../common/strlib.h"
#include "../common/utils.h"

#include "map.h"
#include "guild.h"
#include "storage.h"
#include "battle.h"
#include "npc.h"
#include "pc.h"
#include "status.h"
#include "mob.h"
#include "intif.h"
#include "clif.h"
#include "skill.h"
#include "log.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


static DBMap* guild_db; // int guild_id -> struct guild*
static DBMap* castle_db; // int castle_id -> struct guild_castle*
static DBMap* guild_expcache_db; // int char_id -> struct guild_expcache*
static DBMap* guild_infoevent_db; // int guild_id -> struct eventlist*

struct eventlist {
	char name[EVENT_NAME_LENGTH];
	struct eventlist *next;
};

//Constant related to the flash of the Guild EXP cache
#define GUILD_SEND_XY_INVERVAL	5000 // Interval of sending coordinates and HP
#define GUILD_PAYEXP_INVERVAL 10000 //Interval (maximum survival time of the cache, in milliseconds)
#define GUILD_PAYEXP_LIST 8192 //The maximum number of cache

//Guild EXP cache

struct guild_expcache {
	int guild_id, account_id, char_id;
	uint64 exp;
};
static struct eri *expcache_ers; //For handling of guild exp payment.

#define MAX_GUILD_SKILL_REQUIRE 5
struct{
	int id;
	int max;
	struct{
		short id;
		short lv;
	}need[MAX_GUILD_SKILL_REQUIRE];
} guild_skill_tree[MAX_GUILDSKILL];

int guild_payexp_timer(int tid, unsigned int tick, int id, intptr_t data);
static int guild_send_xy_timer(int tid, unsigned int tick, int id, intptr_t data);

/* guild flags cache */
struct npc_data **guild_flags;
unsigned short guild_flags_count;

/*==========================================
 * Retrieves and validates the sd pointer for this guild member [Skotlex]
 *------------------------------------------*/
static TBL_PC* guild_sd_check(int guild_id, int account_id, int char_id)
{
	TBL_PC* sd = map_id2sd(account_id);

	if (!(sd && sd->status.char_id == char_id))
		return NULL;

	if (sd->status.guild_id != guild_id)
	{	//If player belongs to a different guild, kick him out.
 		intif_guild_leave(guild_id,account_id,char_id,0,"** Guild Mismatch **");
		return NULL;
	}

	return sd;
}

 // Modified [Komurka]
int guild_skill_get_max (int id)
{
	if (id < GD_SKILLBASE || id >= GD_SKILLBASE+MAX_GUILDSKILL)
		return 0;
	return guild_skill_tree[id-GD_SKILLBASE].max;
}

// Retrive skill_lv learned by guild

int guild_checkskill(struct guild *g, int id) {
    int idx = id - GD_SKILLBASE;
    if (idx < 0 || idx >= MAX_GUILDSKILL)
        return 0;
    return g->skill[idx].lv;
}

/*==========================================
 * guild_skill_tree.txt reading - from jA [Komurka]
 *------------------------------------------*/
static bool guild_read_guildskill_tree_db(char* split[], int columns, int current)
{// <skill id>,<max lv>,<req id1>,<req lv1>,<req id2>,<req lv2>,<req id3>,<req lv3>,<req id4>,<req lv4>,<req id5>,<req lv5>
	int k, id, skill_id;

	skill_id = atoi(split[0]);
	id = skill_id - GD_SKILLBASE;

	if( id < 0 || id >= MAX_GUILDSKILL )
	{
		ShowWarning("guild_read_guildskill_tree_db: Invalid skill id %d.\n", skill_id);
		return false;
	}

	guild_skill_tree[id].id = skill_id;
	guild_skill_tree[id].max = atoi(split[1]);

	if( guild_skill_tree[id].id == GD_GLORYGUILD && battle_config.require_glory_guild && guild_skill_tree[id].max == 0 )
	{// enable guild's glory when required for emblems
		guild_skill_tree[id].max = 1;
	}

	for( k = 0; k < MAX_GUILD_SKILL_REQUIRE; k++ )
	{
		guild_skill_tree[id].need[k].id = atoi(split[k*2+2]);
		guild_skill_tree[id].need[k].lv = atoi(split[k*2+3]);
	}

	return true;
}

/*==========================================
 * Guild skill check - from jA [Komurka]
 *------------------------------------------*/
int guild_check_skill_require(struct guild *g,int id)
{
	int i;
	int idx = id-GD_SKILLBASE;

	if(g == NULL)
		return 0;

	if (idx < 0 || idx >= MAX_GUILDSKILL)
		return 0;

	for(i=0;i<MAX_GUILD_SKILL_REQUIRE;i++)
	{
		if(guild_skill_tree[idx].need[i].id == 0) break;
		if(guild_skill_tree[idx].need[i].lv > guild_checkskill(g,guild_skill_tree[idx].need[i].id))
			return 0;
	}
	return 1;
}

static bool guild_read_castledb(char* str[], int columns, int current)
{// <castle id>,<map name>,<castle name>,<castle event>[,<reserved/unused switch flag>]
	struct guild_castle *gc;
	int mapindex = mapindex_name2id(str[1]);

	if (map_mapindex2mapid(mapindex) < 0) // Map not found or on another map-server
		return false;

	CREATE(gc, struct guild_castle, 1);
	gc->castle_id = atoi(str[0]);
	gc->mapindex = mapindex;
	safestrncpy(gc->castle_name, str[2], sizeof(gc->castle_name));
	safestrncpy(gc->castle_event, str[3], sizeof(gc->castle_event));

	idb_put(castle_db,gc->castle_id,gc);

	//intif_guild_castle_info(gc->castle_id);

	return true;
}

/// lookup: guild id -> guild*
struct guild* guild_search(int guild_id)
{
	return (struct guild*)idb_get(guild_db,guild_id);
}

/// lookup: guild name -> guild*
struct guild* guild_searchname(char* str)
{
	struct guild* g;
	DBIterator *iter = db_iterator(guild_db);

	for( g = dbi_first(iter); dbi_exists(iter); g = dbi_next(iter) )
	{
		if( strcmpi(g->name, str) == 0 )
			break;
	}
	dbi_destroy(iter);

	return g;
}

/// lookup: castle id -> castle*
struct guild_castle* guild_castle_search(int gcid)
{
	return (struct guild_castle*)idb_get(castle_db,gcid);
}

/// lookup: map index -> castle*
struct guild_castle* guild_mapindex2gc(short mapindex)
{
	struct guild_castle* gc;
	DBIterator *iter = db_iterator(castle_db);

	for( gc = dbi_first(iter); dbi_exists(iter); gc = dbi_next(iter) )
	{
		if( gc->mapindex == mapindex )
			break;
	}
	dbi_destroy(iter);

	return gc;
}

/// lookup: map name -> castle*
struct guild_castle* guild_mapname2gc(const char* mapname)
{
	return guild_mapindex2gc(mapindex_name2id(mapname));
}

struct map_session_data* guild_getavailablesd(struct guild* g)
{
	int i;

	nullpo_retr(NULL, g);

	ARR_FIND( 0, g->max_member, i, g->member[i].sd != NULL );
	return( i < g->max_member ) ? g->member[i].sd : NULL;
}

/// lookup: player AID/CID -> member index
int guild_getindex(struct guild *g,int account_id,int char_id)
{
	int i;

	if( g == NULL )
		return -1;

	ARR_FIND( 0, g->max_member, i, g->member[i].account_id == account_id && g->member[i].char_id == char_id );
	return( i < g->max_member ) ? i : -1;
}

/// lookup: player sd -> member position
int guild_getposition(struct guild* g, struct map_session_data* sd)
{
	int i;

	if( g == NULL && (g=guild_search(sd->status.guild_id)) == NULL )
		return -1;
	
	ARR_FIND( 0, g->max_member, i, g->member[i].account_id == sd->status.account_id && g->member[i].char_id == sd->status.char_id );
	return( i < g->max_member ) ? g->member[i].position : -1;
}

//Creation of member information
void guild_makemember(struct guild_member *m,struct map_session_data *sd)
{
	nullpo_retv(sd);

	memset(m,0,sizeof(struct guild_member));
	m->account_id	=sd->status.account_id;
	m->char_id		=sd->status.char_id;
	m->hair			=sd->status.hair;
	m->hair_color	=sd->status.hair_color;
	m->gender		=sd->status.sex;
	m->class_		=sd->status.class_;
	m->lv			=sd->status.base_level;
//	m->exp			=0;
//	m->exp_payper	=0;
	m->online		=1;
	m->position		=MAX_GUILDPOSITION-1;
	memcpy(m->name,sd->status.name,NAME_LENGTH);
	return;
}

/**
 * Server cache to be flushed to inter the Guild EXP
 * @see DBApply
 */
int guild_payexp_timer_sub(DBKey key, DBData *data, va_list ap) {
	int i;
	struct guild_expcache *c;
	struct guild *g;

	c = db_data2ptr(data);
	
	if (
		(g = guild_search(c->guild_id)) == NULL ||
		(i = guild_getindex(g, c->account_id, c->char_id)) < 0
	) {
		ers_free(expcache_ers, c);
		return 0;
	}

	if (g->member[i].exp > UINT64_MAX - c->exp)
		g->member[i].exp = UINT64_MAX;
	else
		g->member[i].exp+= c->exp;

	intif_guild_change_memberinfo(g->guild_id,c->account_id,c->char_id,
		GMI_EXP,&g->member[i].exp,sizeof(g->member[i].exp));
	c->exp=0;

	ers_free(expcache_ers, c);
	return 0;
}

int guild_payexp_timer(int tid, unsigned int tick, int id, intptr_t data)
{
	guild_expcache_db->clear(guild_expcache_db,guild_payexp_timer_sub);
	return 0;
}

/**
 * Taken from party_send_xy_timer_sub. [Skotlex]
 * @see DBApply
 */
int guild_send_xy_timer_sub(DBKey key, DBData *data, va_list ap)
{
	struct guild *g = db_data2ptr(data);
	int i;

	nullpo_ret(g);

	if( !g->connect_member )
	{// no members connected to this guild so do not iterate
		return 0;
	}

	for(i=0;i<g->max_member;i++){
		struct map_session_data* sd = g->member[i].sd;
		if( sd != NULL && sd->fd && (sd->guild_x != sd->bl.x || sd->guild_y != sd->bl.y) && !sd->bg_id )
		{
			clif_guild_xy(sd);
			sd->guild_x = sd->bl.x;
			sd->guild_y = sd->bl.y;
		}
	}
	return 0;
}

//Code from party_send_xy_timer [Skotlex]
static int guild_send_xy_timer(int tid, unsigned int tick, int id, intptr_t data)
{
	guild_db->foreach(guild_db,guild_send_xy_timer_sub,tick);
	return 0;
}

int guild_send_dot_remove(struct map_session_data *sd)
{
	if (sd->status.guild_id)
		clif_guild_xy_remove(sd);
	return 0;
}
//------------------------------------------------------------------------

int guild_create(struct map_session_data *sd, const char *name)
{
	char tname[NAME_LENGTH];
	struct guild_member m;
	nullpo_ret(sd);

	safestrncpy(tname, name, NAME_LENGTH);
	trim(tname);

	if( !tname[0] )
		return 0; // empty name

	if( sd->status.guild_id )
	{// already in a guild
		clif_guild_created(sd,1);
		return 0;
	}
	if( battle_config.guild_emperium_check && pc_search_inventory(sd,714) == -1 )
	{// item required
		clif_guild_created(sd,3);
		return 0;
	}

	guild_makemember(&m,sd);
	m.position=0;
	intif_guild_create(name,&m);
	return 1;
}

//Whether or not to create guild
int guild_created(int account_id,int guild_id)
{
	struct map_session_data *sd=map_id2sd(account_id);

	if(sd==NULL)
		return 0;
	if(!guild_id) {
        clif_guild_created(sd, 2); // Creation failure (presence of the same name Guild)
		return 0;
	}
	//struct guild *g;
	sd->status.guild_id=guild_id;
	clif_guild_created(sd,0);
	if(battle_config.guild_emperium_check)
		pc_delitem(sd,pc_search_inventory(sd,ITEMID_EMPERIUM),1,0,0,LOG_TYPE_CONSUME);	//emperium consumption
	return 0;
}

//Information request
int guild_request_info(int guild_id)
{
	return intif_guild_request_info(guild_id);
}

//Information request with event
int guild_npc_request_info(int guild_id,const char *event)
{
	if( guild_search(guild_id) )
	{
		if( event && *event )
			npc_event_do(event);

		return 0;
	}

	if( event && *event )
	{
		struct eventlist *ev;
		DBData prev;
		ev=(struct eventlist *)aCalloc(sizeof(struct eventlist),1);
		memcpy(ev->name,event,strlen(event));
		//The one in the db (if present) becomes the next event from this.
		if (guild_infoevent_db->put(guild_infoevent_db, db_i2key(guild_id), db_ptr2data(ev), &prev))
			ev->next = db_data2ptr(&prev);
	}

	return guild_request_info(guild_id);
}

//Confirmation of the character belongs to guild
int guild_check_member(struct guild *g)
{
	int i;
	struct map_session_data *sd;
	struct s_mapiterator* iter;

	nullpo_ret(g);

	iter = mapit_getallusers();
	for( sd = (TBL_PC*)mapit_first(iter); mapit_exists(iter); sd = (TBL_PC*)mapit_next(iter) )
	{
		if( sd->status.guild_id != g->guild_id )
			continue;

		i = guild_getindex(g,sd->status.account_id,sd->status.char_id);
		if (i < 0) {
			sd->status.guild_id=0;
			sd->guild_emblem_id=0;
			ShowWarning("guild: check_member %d[%s] is not member\n",sd->status.account_id,sd->status.name);
		}
	}
	mapit_free(iter);

	return 0;
}

//Delete association with guild_id for all characters
int guild_recv_noinfo(int guild_id)
{
	struct map_session_data *sd;
	struct s_mapiterator* iter;

	iter = mapit_getallusers();
	for( sd = (TBL_PC*)mapit_first(iter); mapit_exists(iter); sd = (TBL_PC*)mapit_next(iter) )
	{
		if( sd->status.guild_id == guild_id )
			sd->status.guild_id = 0; // erase guild
	}
	mapit_free(iter);

	return 0;
}

//Get and display information for all member
int guild_recv_info(struct guild *sg)
{
	struct guild *g,before;
	int i,bm,m;
	DBData data;
	struct map_session_data *sd;
	bool guild_new = false;

	nullpo_ret(sg);

	if((g = (struct guild*)idb_get(guild_db,sg->guild_id))==NULL)
	{
		guild_new = true;
		g=(struct guild *)aCalloc(1,sizeof(struct guild));
		idb_put(guild_db,sg->guild_id,g);
		before=*sg;

        //Perform the check on the user because the first load
		guild_check_member(sg);
		if ((sd = map_nick2sd(sg->master)) != NULL)
		{
			//If the guild master is online the first time the guild_info is received,
			//that means he was the first to join, so apply guild skill blocking here.
			if( battle_config.guild_skill_relog_delay )
				guild_block_skill(sd, 300000);

			//Also set the guild master flag.
			sd->state.gmaster_flag = g;
			clif_charnameupdate(sd); // [LuzZza]
			clif_guild_masterormember(sd);
		}
	}else
		before=*g;
	memcpy(g,sg,sizeof(struct guild));

	if(g->max_member > MAX_GUILD)
	{
		ShowError("guild_recv_info: Received guild with %d members, but MAX_GUILD is only %d. Extra guild-members have been lost!\n", g->max_member, MAX_GUILD);
		g->max_member = MAX_GUILD;
	}
	
	for(i=bm=m=0;i<g->max_member;i++){
		if(g->member[i].account_id>0){
			sd = g->member[i].sd = guild_sd_check(g->guild_id, g->member[i].account_id, g->member[i].char_id);
			if (sd) clif_charnameupdate(sd); // [LuzZza]
			m++;
		}else
			g->member[i].sd=NULL;
		if(before.member[i].account_id>0)
			bm++;
	}

    for (i = 0; i < g->max_member; i++) { //Transmission of information at all members
		sd = g->member[i].sd;
		if( sd==NULL )
			continue;

        if (before.guild_lv != g->guild_lv || bm != m ||
                before.max_member != g->max_member) {
            clif_guild_basicinfo(sd); //Submit basic information
            clif_guild_emblem(sd, g); //Submit emblem
        }

        if (bm != m) { //Send members information
            clif_guild_memberlist(g->member[i].sd);
        }

        if (before.skill_point != g->skill_point)
            clif_guild_skillinfo(sd); //Submit information skills

        if (guild_new) { // Send information and affiliation if unsent
            clif_guild_belonginfo(sd, g);
            clif_guild_notice(sd, g);
            sd->guild_emblem_id = g->emblem_id;
        }
    }

    //Occurrence of an event
	if (guild_infoevent_db->remove(guild_infoevent_db, db_i2key(sg->guild_id), &data))
	{
		struct eventlist *ev = db_data2ptr(&data), *ev2;
		while(ev){
			npc_event_do(ev->name);
			ev2=ev->next;
			aFree(ev);
			ev=ev2;
		}
	}

	return 0;
}

/*=============================================
 * Player sd send a guild invatation to player tsd to join his guild
 *--------------------------------------------*/
int guild_invite(struct map_session_data *sd, struct map_session_data *tsd) {
    struct guild *g;
    int i;

	nullpo_ret(sd);

	g=guild_search(sd->status.guild_id);

	if(tsd==NULL || g==NULL)
		return 0;

	if( (i=guild_getposition(g,sd))<0 || !(g->position[i].mode&0x0001) )
		return 0; //Invite permission.

	if(!battle_config.invite_request_check) {
        if (tsd->party_invite > 0 || tsd->trade_partner || tsd->adopt_invite) { //checking if there no other invitation pending
			clif_guild_inviteack(sd,0);
			return 0;
		}
	}
	
	if (!tsd->fd) { //You can't invite someone who has already disconnected.
		clif_guild_inviteack(sd,1);
		return 0;
	}

	if(tsd->status.guild_id>0 ||
		tsd->guild_invite>0 ||
		((agit_flag || agit2_flag) && map[tsd->bl.m].flag.gvg_castle))
	{	//Can't invite people inside castles. [Skotlex]
		clif_guild_inviteack(sd,0);
		return 0;
	}

    //search an empty spot in guild
	ARR_FIND( 0, g->max_member, i, g->member[i].account_id == 0 );
	if(i==g->max_member){
		clif_guild_inviteack(sd,3);
		return 0;
	}

	tsd->guild_invite=sd->status.guild_id;
	tsd->guild_invite_account=sd->status.account_id;

	clif_guild_invite(tsd,g);
	return 0;
}

/// Guild invitation reply.
/// flag: 0:rejected, 1:accepted
int guild_reply_invite(struct map_session_data* sd, int guild_id, int flag)
{
	struct map_session_data* tsd;

	nullpo_ret(sd);

	// subsequent requests may override the value
	if( sd->guild_invite != guild_id )
		return 0; // mismatch

	// look up the person who sent the invite
	//NOTE: this can be NULL because the person might have logged off in the meantime
	tsd = map_id2sd(sd->guild_invite_account);

	if ( sd->status.guild_id > 0 ) // [Paradox924X]
	{ // Already in another guild.
		if ( tsd ) clif_guild_inviteack(tsd,0);
		return 0;
	}
	else if( flag == 0 )
	{// rejected
		sd->guild_invite = 0;
		sd->guild_invite_account = 0;
		if( tsd ) clif_guild_inviteack(tsd,1);
	}
	else
	{// accepted
		struct guild_member m;
		struct guild* g;
		int i;

		if( (g=guild_search(guild_id)) == NULL )
		{
			sd->guild_invite = 0;
			sd->guild_invite_account = 0;
			return 0;
		}

		ARR_FIND( 0, g->max_member, i, g->member[i].account_id == 0 );
		if( i == g->max_member )
		{
			sd->guild_invite = 0;
			sd->guild_invite_account = 0;
			if( tsd ) clif_guild_inviteack(tsd,3);
			return 0;
		}

		guild_makemember(&m,sd);
		intif_guild_addmember(guild_id, &m);
		//TODO: send a minimap update to this player
	}

	return 0;
}

//Invoked when a player joins.
//- If guild is not in memory, it is requested
//- Otherwise sd pointer is set up.
//- Player must be authed and must belong to a guild before invoking this method
void guild_member_joined(struct map_session_data *sd)
{
	struct guild* g;
	int i;
	g=guild_search(sd->status.guild_id);
	if (!g) {
		guild_request_info(sd->status.guild_id);
		return;
	}
	if (strcmp(sd->status.name,g->master) == 0)
	{	// set the Guild Master flag
		sd->state.gmaster_flag = g;
		// prevent Guild Skills from being used directly after relog
		if( battle_config.guild_skill_relog_delay )
			guild_block_skill(sd, 300000);
	}
	i = guild_getindex(g, sd->status.account_id, sd->status.char_id);
	if (i == -1)
		sd->status.guild_id = 0;
	else
		g->member[i].sd = sd;
}

/*==========================================
 * Add a player to a given guild_id
 *----------------------------------------*/
int guild_member_added(int guild_id,int account_id,int char_id,int flag)
{
	struct map_session_data *sd= map_id2sd(account_id),*sd2;
	struct guild *g;

	if( (g=guild_search(guild_id))==NULL )
		return 0;

	if(sd==NULL || sd->guild_invite==0){
        // cancel if player not present or invalide guild_id invitation
		if (flag == 0) {
			ShowError("guild: member added error %d is not online\n",account_id);
 			intif_guild_leave(guild_id,account_id,char_id,0,"** Data Error **");
		}
		return 0;
	}
	sd2 = map_id2sd(sd->guild_invite_account);
	sd->guild_invite = 0;
	sd->guild_invite_account = 0;

    if (flag == 1) { //failure
		if( sd2!=NULL )
			clif_guild_inviteack(sd2,3);
		return 0;
	}

    //if all ok add player to guild
	sd->status.guild_id = g->guild_id;
	sd->guild_emblem_id = g->emblem_id;
	//Packets which were sent in the previous 'guild_sent' implementation.
	clif_guild_belonginfo(sd,g);
	clif_guild_notice(sd,g);

	//TODO: send new emblem info to others

	if( sd2!=NULL )
		clif_guild_inviteack(sd2,2);

	//Next line commented because it do nothing, look at guild_recv_info [LuzZza]
	//clif_charnameupdate(sd); //Update display name [Skotlex]

	return 0;
}

/*==========================================
 * Player request leaving a given guild_id
 *----------------------------------------*/
int guild_leave(struct map_session_data* sd, int guild_id, int account_id, int char_id, const char* mes)
{
	struct guild *g;

	nullpo_ret(sd);

	g = guild_search(sd->status.guild_id);

	if(g==NULL)
		return 0;

	if(sd->status.account_id!=account_id ||
		sd->status.char_id!=char_id || sd->status.guild_id!=guild_id ||
		((agit_flag || agit2_flag) && map[sd->bl.m].flag.gvg_castle))
		return 0;

	intif_guild_leave(sd->status.guild_id, sd->status.account_id, sd->status.char_id,0,mes);
	return 0;
}

/*==========================================
 * Request remove a player to a given guild_id
 *----------------------------------------*/
int guild_expulsion(struct map_session_data* sd, int guild_id, int account_id, int char_id, const char* mes)
{
	struct map_session_data *tsd;
	struct guild *g;
	int i,ps;

	nullpo_ret(sd);

	g = guild_search(sd->status.guild_id);

	if(g==NULL)
		return 0;

	if(sd->status.guild_id!=guild_id)
		return 0;

	if( (ps=guild_getposition(g,sd))<0 || !(g->position[ps].mode&0x0010) )
		return 0;	//Expulsion permission

  	//Can't leave inside guild castles.
	if ((tsd = map_id2sd(account_id)) &&
		tsd->status.char_id == char_id &&
		((agit_flag || agit2_flag) && map[tsd->bl.m].flag.gvg_castle))
		return 0;

	// find the member and perform expulsion
	i = guild_getindex(g, account_id, char_id);
	if( i != -1 && strcmp(g->member[i].name,g->master) != 0 ) //Can't expel the GL!
		intif_guild_leave(g->guild_id,account_id,char_id,1,mes);

	return 0;
}

int guild_member_withdraw(int guild_id, int account_id, int char_id, int flag, const char* name, const char* mes)
{
	int i;
	struct guild* g = guild_search(guild_id);
	struct map_session_data* sd = map_charid2sd(char_id);
	struct map_session_data* online_member_sd;

	if(g == NULL)
		return 0; // no such guild (error!)
	
	i = guild_getindex(g, account_id, char_id);
	if( i == -1 )
		return 0; // not a member (inconsistency!)

	online_member_sd = guild_getavailablesd(g);
	if(online_member_sd == NULL)
		return 0; // noone online to inform

	if(!flag)
		clif_guild_leave(online_member_sd, name, mes);
	else
		clif_guild_expulsion(online_member_sd, name, mes, account_id);

	// remove member from guild
	memset(&g->member[i],0,sizeof(struct guild_member));
	clif_guild_memberlist(online_member_sd);

	// update char, if online
	if(sd != NULL && sd->status.guild_id == guild_id)
	{
		// do stuff that needs the guild_id first, BEFORE we wipe it
		if (sd->state.storage_flag == 2) //Close the guild storage.
			storage_guild_storageclose(sd);
		guild_send_dot_remove(sd);

		sd->status.guild_id = 0;
		sd->guild_emblem_id = 0;
		
		clif_charnameupdate(sd); //Update display name [Skotlex]
		//TODO: send emblem update to self and people around
	}
	return 0;
}

int guild_send_memberinfoshort(struct map_session_data *sd,int online)
{ // cleaned up [LuzZza]
	struct guild *g;
	
	nullpo_ret(sd);
		
	if(sd->status.guild_id <= 0)
		return 0;

	if(!(g = guild_search(sd->status.guild_id)))
		return 0;

	intif_guild_memberinfoshort(g->guild_id,
		sd->status.account_id,sd->status.char_id,online,sd->status.base_level,sd->status.class_);

	if(!online){
		int i=guild_getindex(g,sd->status.account_id,sd->status.char_id);
		if(i>=0)
			g->member[i].sd=NULL;
		else
			ShowError("guild_send_memberinfoshort: Failed to locate member %d:%d in guild %d!\n", sd->status.account_id, sd->status.char_id, g->guild_id);
		return 0;
	}
	
	if(sd->state.connect_new)
	{	//Note that this works because it is invoked in parse_LoadEndAck before connect_new is cleared.
		clif_guild_belonginfo(sd,g);
		clif_guild_notice(sd,g);
		sd->guild_emblem_id = g->emblem_id;
	}
	return 0;
}

int guild_recv_memberinfoshort(int guild_id,int account_id,int char_id,int online,int lv,int class_)
{ // cleaned up [LuzZza]
	
	int i,alv,c,idx=-1,om=0,oldonline=-1;
	struct guild *g = guild_search(guild_id);
	
	if(g == NULL)
		return 0;
	
	for(i=0,alv=0,c=0,om=0;i<g->max_member;i++){
		struct guild_member *m=&g->member[i];
		if(!m->account_id) continue;
		if(m->account_id==account_id && m->char_id==char_id ){
			oldonline=m->online;
			m->online=online;
			m->lv=lv;
			m->class_=class_;
			idx=i;
		}
		alv+=m->lv;
		c++;
		if(m->online)
			om++;
	}
	
	if(idx == -1 || c == 0) {
        //Treat char_id who doesn't match guild_id (not found as member)
		struct map_session_data *sd = map_id2sd(account_id);
		if(sd && sd->status.char_id == char_id) {
			sd->status.guild_id=0;
			sd->guild_emblem_id=0;
		}
		ShowWarning("guild: not found member %d,%d on %d[%s]\n",	account_id,char_id,guild_id,g->name);
		return 0;
	}
	
	g->average_lv=alv/c;
	g->connect_member=om;

	//Ensure validity of pointer (ie: player logs in/out, changes map-server)
	g->member[idx].sd = guild_sd_check(guild_id, account_id, char_id);

	if(oldonline!=online) 
		clif_guild_memberlogin_notice(g, idx, online);
	
	if(!g->member[idx].sd)
		return 0;

	//Send XY dot updates. [Skotlex]
	//Moved from guild_send_memberinfoshort [LuzZza]
	for(i=0; i < g->max_member; i++) {
		
		if(!g->member[i].sd || i == idx ||
			g->member[i].sd->bl.m != g->member[idx].sd->bl.m)
			continue;

		clif_guild_xy_single(g->member[idx].sd->fd, g->member[i].sd);
		clif_guild_xy_single(g->member[i].sd->fd, g->member[idx].sd);
	}

	return 0;
}

/*====================================================
 * Send a message to whole guild
 *---------------------------------------------------*/
int guild_send_message(struct map_session_data *sd,const char *mes,int len)
{
	nullpo_ret(sd);

	if(sd->status.guild_id==0)
		return 0;
	intif_guild_message(sd->status.guild_id,sd->status.account_id,mes,len);
	guild_recv_message(sd->status.guild_id,sd->status.account_id,mes,len);

	// Chat logging type 'G' / Guild Chat
	log_chat(LOG_CHAT_GUILD, sd->status.guild_id, sd->status.char_id, sd->status.account_id, mapindex_id2name(sd->mapindex), sd->bl.x, sd->bl.y, NULL, mes);

	return 0;
}

/*====================================================
 * Guild receive a message, will be displayed to whole member
 *---------------------------------------------------*/
int guild_recv_message(int guild_id,int account_id,const char *mes,int len)
{
	struct guild *g;
	if( (g=guild_search(guild_id))==NULL)
		return 0;
	clif_guild_message(g,account_id,mes,len);
	return 0;
}

/*====================================================
 * Member changing position in guild
 *---------------------------------------------------*/
int guild_change_memberposition(int guild_id,int account_id,int char_id,short idx)
{
	return intif_guild_change_memberinfo(guild_id,account_id,char_id,GMI_POSITION,&idx,sizeof(idx));
}

/*====================================================
 * Notification of new position for member
 *---------------------------------------------------*/
int guild_memberposition_changed(struct guild *g,int idx,int pos)
{
	nullpo_ret(g);

	g->member[idx].position=pos;
	clif_guild_memberpositionchanged(g,idx);
	
	// Update char position in client [LuzZza]
	if(g->member[idx].sd != NULL)
		clif_charnameupdate(g->member[idx].sd);
	return 0;
}

/*====================================================
 * Change guild title or member
 *---------------------------------------------------*/
int guild_change_position(int guild_id,int idx,
	int mode,int exp_mode,const char *name)
{
	struct guild_position p;

	exp_mode = cap_value(exp_mode, 0, battle_config.guild_exp_limit);
	//Mode 0x01 <- Invite
	//Mode 0x10 <- Expel.
	p.mode=mode&0x11;
	p.exp_mode=exp_mode;
	safestrncpy(p.name,name,NAME_LENGTH);
	return intif_guild_position(guild_id,idx,&p);
}

/*====================================================
 * Notification of member has changed his guild title
 *---------------------------------------------------*/
int guild_position_changed(int guild_id,int idx,struct guild_position *p)
{
	struct guild *g=guild_search(guild_id);
	int i;
	if(g==NULL)
		return 0;
	memcpy(&g->position[idx],p,sizeof(struct guild_position));
	clif_guild_positionchanged(g,idx);
	
	// Update char name in client [LuzZza]
	for(i=0;i<g->max_member;i++)
		if(g->member[i].position == idx && g->member[i].sd != NULL)
			clif_charnameupdate(g->member[i].sd);
	return 0;
}

/*====================================================
 * Change guild notice
 *---------------------------------------------------*/
int guild_change_notice(struct map_session_data *sd,int guild_id,const char *mes1,const char *mes2)
{
	nullpo_ret(sd);

	if(guild_id!=sd->status.guild_id)
		return 0;
	return intif_guild_notice(guild_id,mes1,mes2);
}

/*====================================================
 * Notification of guild has changed his notice
 *---------------------------------------------------*/
int guild_notice_changed(int guild_id,const char *mes1,const char *mes2)
{
	int i;
	struct map_session_data *sd;
	struct guild *g=guild_search(guild_id);
	if(g==NULL)
		return 0;

	memcpy(g->mes1,mes1,MAX_GUILDMES1);
	memcpy(g->mes2,mes2,MAX_GUILDMES2);

	for(i=0;i<g->max_member;i++){
		if((sd=g->member[i].sd)!=NULL)
			clif_guild_notice(sd,g);
	}
	return 0;
}

/*====================================================
 * Change guild emblem
 *---------------------------------------------------*/
int guild_change_emblem(struct map_session_data *sd,int len,const char *data)
{
	struct guild *g;
	nullpo_ret(sd);

	if (battle_config.require_glory_guild &&
		!((g = guild_search(sd->status.guild_id)) && guild_checkskill(g, GD_GLORYGUILD)>0)) {
		clif_skill_fail(sd,GD_GLORYGUILD,USESKILL_FAIL_LEVEL,0);
		return 0;
	}

	return intif_guild_emblem(sd->status.guild_id,len,data);
}

/*====================================================
 * Notification of guild emblem changed
 *---------------------------------------------------*/
int guild_emblem_changed(int len,int guild_id,int emblem_id,const char *data)
{
	int i;
	struct map_session_data *sd;
	struct guild *g=guild_search(guild_id);
	if(g==NULL)
		return 0;

	memcpy(g->emblem_data,data,len);
	g->emblem_len=len;
	g->emblem_id=emblem_id;

	for(i=0;i<g->max_member;i++){
		if((sd=g->member[i].sd)!=NULL){
			sd->guild_emblem_id=emblem_id;
			clif_guild_belonginfo(sd,g);
			clif_guild_emblem(sd,g);
			clif_guild_emblem_area(&sd->bl);
		}
	}
	{// update guardians (mobs)
		DBIterator* iter = db_iterator(castle_db);
		struct guild_castle* gc;
		for( gc = (struct guild_castle*)dbi_first(iter) ; dbi_exists(iter); gc = (struct guild_castle*)dbi_next(iter) )
		{
			if( gc->guild_id != guild_id )
				continue;
			// update permanent guardians
			for( i = 0; i < ARRAYLENGTH(gc->guardian); ++i )
			{
				TBL_MOB* md = (gc->guardian[i].id ? map_id2md(gc->guardian[i].id) : NULL);
				if( md == NULL || md->guardian_data == NULL )
					continue;
				md->guardian_data->emblem_id = emblem_id;
				clif_guild_emblem_area(&md->bl);
			}
			// update temporary guardians
			for( i = 0; i < gc->temp_guardians_max; ++i )
			{
				TBL_MOB* md = (gc->temp_guardians[i] ? map_id2md(gc->temp_guardians[i]) : NULL);
				if( md == NULL || md->guardian_data == NULL )
					continue;
				md->guardian_data->emblem_id = emblem_id;
				clif_guild_emblem_area(&md->bl);
			}
		}
		dbi_destroy(iter);
	}
	{// update npcs (flags or other npcs that used flagemblem to attach to this guild)
		for( i = 0; i < guild_flags_count; i++ ) {
			if( guild_flags[i] && guild_flags[i]->u.scr.guild_id == guild_id ) {
				clif_guild_emblem_area(&guild_flags[i]->bl);
			}
		}
	}
	return 0;
}

/**
 * @see DBCreateData
 */
static DBData create_expcache(DBKey key, va_list args)
{
	struct guild_expcache *c;
	struct map_session_data *sd = va_arg(args, struct map_session_data*);

	c = ers_alloc(expcache_ers, struct guild_expcache);
	c->guild_id = sd->status.guild_id;
	c->account_id = sd->status.account_id;
	c->char_id = sd->status.char_id;
	c->exp = 0;
	return db_ptr2data(c);
}

/*====================================================
 * Return taxed experience from player sd to guild
 *---------------------------------------------------*/
unsigned int guild_payexp(struct map_session_data *sd,unsigned int exp)
{
	struct guild *g;
	struct guild_expcache *c;
	int per;
	
	nullpo_ret(sd);

	if (!exp) return 0;
	
	if (sd->status.guild_id == 0 ||
		(g = guild_search(sd->status.guild_id)) == NULL ||
		(per = guild_getposition(g,sd)) < 0 ||
		(per = g->position[per].exp_mode) < 1)
		return 0;
	

	if (per < 100)
		exp = exp * per / 100;
	//Otherwise tax everything.
	
	c = db_data2ptr(guild_expcache_db->ensure(guild_expcache_db, db_i2key(sd->status.char_id), create_expcache, sd));

	if (c->exp > UINT64_MAX - exp)
		c->exp = UINT64_MAX;
	else
		c->exp += exp;
	
	return exp;
}

/*====================================================
 * Player sd pay a tribute experience to his guild
 * Add this experience to guild exp
 * [Celest]
 *---------------------------------------------------*/
int guild_getexp(struct map_session_data *sd,int exp)
{
	struct guild_expcache *c;
	nullpo_ret(sd);

	if (sd->status.guild_id == 0 || guild_search(sd->status.guild_id) == NULL)
		return 0;

	c = db_data2ptr(guild_expcache_db->ensure(guild_expcache_db, db_i2key(sd->status.char_id), create_expcache, sd));
	if (c->exp > UINT64_MAX - exp)
		c->exp = UINT64_MAX;
	else
		c->exp += exp;
	return exp;
}

/*====================================================
 * Ask to increase guildskill skill_id
 *---------------------------------------------------*/
int guild_skillup(TBL_PC* sd, uint16 skill_id)
{
	struct guild* g;
	int idx = skill_id - GD_SKILLBASE;
	int max = guild_skill_get_max(skill_id);

	nullpo_ret(sd);

	if( idx < 0 || idx >= MAX_GUILDSKILL || // not a guild skill
			sd->status.guild_id == 0 || (g=guild_search(sd->status.guild_id)) == NULL || // no guild
			strcmp(sd->status.name, g->master) ) // not the guild master
		return 0;

	if( g->skill_point > 0 &&
			g->skill[idx].id != 0 &&
			g->skill[idx].lv < max )
		intif_guild_skillup(g->guild_id, skill_id, sd->status.account_id, max);

	return 0;
}

/*====================================================
 * Notification of guildskill skill_id increase request
 *---------------------------------------------------*/
int guild_skillupack(int guild_id,uint16 skill_id,int account_id)
{
	struct map_session_data *sd=map_id2sd(account_id);
	struct guild *g=guild_search(guild_id);
	int i;
	if(g==NULL)
		return 0;
	if( sd != NULL ) {
		clif_guild_skillup(sd,skill_id,g->skill[skill_id-GD_SKILLBASE].lv);

		/* Guild Aura handling */
		switch( skill_id ) {
			case GD_LEADERSHIP:
			case GD_GLORYWOUNDS:
			case GD_SOULCOLD:
			case GD_HAWKEYES:
					guild_guildaura_refresh(sd,skill_id,g->skill[skill_id-GD_SKILLBASE].lv);
				break;
		}
	}

	// Inform all members
	for(i=0;i<g->max_member;i++)
		if((sd=g->member[i].sd)!=NULL)
			clif_guild_skillinfo(sd);

	return 0;
}

void guild_guildaura_refresh(struct map_session_data *sd, uint16 skill_id, uint16 skill_lv) {
	struct skill_unit_group* group = NULL;
	int type = status_skill2sc(skill_id);
	if( !(battle_config.guild_aura&((agit_flag || agit2_flag)?2:1)) &&
			!(battle_config.guild_aura&(map_flag_gvg2(sd->bl.m)?8:4)) )
		return;
	if( !skill_lv )
		return;
	if( sd->sc.data[type] && (group = skill_id2group(sd->sc.data[type]->val4)) ) {
		skill_delunitgroup(group);
		status_change_end(&sd->bl,type,INVALID_TIMER);
	}
	group = skill_unitsetting(&sd->bl,skill_id,skill_lv,sd->bl.x,sd->bl.y,0);
	if( group ) {
		sc_start4(&sd->bl,type,100,(battle_config.guild_aura&16)?0:skill_lv,0,0,group->group_id,600000);//duration doesn't matter these status never end with val4
	}
	return;
}

/*====================================================
 * Count number of relations the guild has.
 * Flag:
 *	0 = allied
 *	1 = enemy
 *---------------------------------------------------*/
int guild_get_alliance_count(struct guild *g,int flag)
{
	int i,c;

	nullpo_ret(g);

	for(i=c=0;i<MAX_GUILDALLIANCE;i++){
		if(	g->alliance[i].guild_id>0 &&
			g->alliance[i].opposition==flag )
			c++;
	}
	return c;
}

// Blocks all guild skills which have a common delay time.
void guild_block_skill(struct map_session_data *sd, int time)
{
	uint16 skill_id[] = { GD_BATTLEORDER, GD_REGENERATION, GD_RESTORE, GD_EMERGENCYCALL };
	int i;
	for (i = 0; i < 4; i++)
		skill_blockpc_start_(sd, skill_id[i], time , true);
}

/*====================================================
 * Check relation between guild_id1 and guild_id2.
 * Flag:
 *	0 = allied
 *	1 = enemy
 * Returns true if yes.
 *---------------------------------------------------*/
int guild_check_alliance(int guild_id1, int guild_id2, int flag)
{
	struct guild *g;
	int i;

	g = guild_search(guild_id1);
	if (g == NULL)
		return 0;

	ARR_FIND( 0, MAX_GUILDALLIANCE, i, g->alliance[i].guild_id == guild_id2 && g->alliance[i].opposition == flag );
	return( i < MAX_GUILDALLIANCE ) ? 1 : 0;
}

/*====================================================
 * Player sd, asking player tsd an alliance between their 2 guilds
 *---------------------------------------------------*/
int guild_reqalliance(struct map_session_data *sd,struct map_session_data *tsd)
{
	struct guild *g[2];
	int i;

	if(agit_flag || agit2_flag)	{	// Disable alliance creation during woe [Valaris]
		clif_displaymessage(sd->fd,msg_txt(676)); //"Alliances cannot be made during Guild Wars!"
		return 0;
	}	// end addition [Valaris]


	nullpo_ret(sd);

	if(tsd==NULL || tsd->status.guild_id<=0)
		return 0;

	g[0]=guild_search(sd->status.guild_id);
	g[1]=guild_search(tsd->status.guild_id);

	if(g[0]==NULL || g[1]==NULL)
		return 0;

	// Prevent creation alliance with same guilds [LuzZza]
	if(sd->status.guild_id == tsd->status.guild_id)
		return 0;

	if( guild_get_alliance_count(g[0],0) >= battle_config.max_guild_alliance )	{
		clif_guild_allianceack(sd,4);
		return 0;
	}
	if( guild_get_alliance_count(g[1],0) >= battle_config.max_guild_alliance ) {
		clif_guild_allianceack(sd,3);
		return 0;
	}

	if( tsd->guild_alliance>0 ){
		clif_guild_allianceack(sd,1);
		return 0;
	}

    for (i = 0; i < MAX_GUILDALLIANCE; i++) { // check if already allied
		if(	g[0]->alliance[i].guild_id==tsd->status.guild_id &&
			g[0]->alliance[i].opposition==0){
			clif_guild_allianceack(sd,0);
			return 0;
		}
	}

	tsd->guild_alliance=sd->status.guild_id;
	tsd->guild_alliance_account=sd->status.account_id;

	clif_guild_reqalliance(tsd,sd->status.account_id,g[0]->name);
	return 0;
}

/*====================================================
 * Player sd, answer to player tsd (account_id) for an alliance request
 *---------------------------------------------------*/
int guild_reply_reqalliance(struct map_session_data *sd,int account_id,int flag)
{
	struct map_session_data *tsd;

	nullpo_ret(sd);
	tsd= map_id2sd( account_id );
	if (!tsd) { //Character left? Cancel alliance.
		clif_guild_allianceack(sd,3);
		return 0;
	}

    if (sd->guild_alliance != tsd->status.guild_id) // proposed guild_id alliance doesn't match tsd guildid
		return 0;

    if (flag == 1) { // consent
		int i;

        struct guild *g, *tg; // Reconfirm the number of alliance
		g=guild_search(sd->status.guild_id);
		tg=guild_search(tsd->status.guild_id);
		
		if(g==NULL || guild_get_alliance_count(g,0) >= battle_config.max_guild_alliance){
			clif_guild_allianceack(sd,4);
			clif_guild_allianceack(tsd,3);
			return 0;
		}
		if(tg==NULL || guild_get_alliance_count(tg,0) >= battle_config.max_guild_alliance){
			clif_guild_allianceack(sd,3);
			clif_guild_allianceack(tsd,4);
			return 0;
		}

		for(i=0;i<MAX_GUILDALLIANCE;i++){
			if(g->alliance[i].guild_id==tsd->status.guild_id &&
				g->alliance[i].opposition==1)
				intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
					sd->status.account_id,tsd->status.account_id,9 );
		}
		for(i=0;i<MAX_GUILDALLIANCE;i++){
			if(tg->alliance[i].guild_id==sd->status.guild_id &&
				tg->alliance[i].opposition==1)
				intif_guild_alliance( tsd->status.guild_id,sd->status.guild_id,
					tsd->status.account_id,sd->status.account_id,9 );
		}

        // inform other servers
		intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
			sd->status.account_id,tsd->status.account_id,0 );
		return 0;
    } else { // deny
		sd->guild_alliance=0;
		sd->guild_alliance_account=0;
		if(tsd!=NULL)
			clif_guild_allianceack(tsd,3);
	}
	return 0;
}

/*====================================================
 * Player sd asking to break alliance with guild guild_id
 *---------------------------------------------------*/
int guild_delalliance(struct map_session_data *sd,int guild_id,int flag)
{
	nullpo_ret(sd);

	if(agit_flag || agit2_flag)	{	// Disable alliance breaking during woe [Valaris]
		clif_displaymessage(sd->fd,msg_txt(677)); //"Alliances cannot be broken during Guild Wars!"
		return 0;
	}	// end addition [Valaris]

	intif_guild_alliance( sd->status.guild_id,guild_id,sd->status.account_id,0,flag|8 );
	return 0;
}

/*====================================================
 * Player sd, asking player tsd a formal enemy relation between their 2 guilds
 *---------------------------------------------------*/
int guild_opposition(struct map_session_data *sd,struct map_session_data *tsd)
{
	struct guild *g;
	int i;

	nullpo_ret(sd);

	g=guild_search(sd->status.guild_id);
	if(g==NULL || tsd==NULL)
		return 0;

	// Prevent creation opposition with same guilds [LuzZza]
	if(sd->status.guild_id == tsd->status.guild_id)
		return 0;

	if( guild_get_alliance_count(g,1) >= battle_config.max_guild_alliance )	{
		clif_guild_oppositionack(sd,1);
		return 0;
	}

    for (i = 0; i < MAX_GUILDALLIANCE; i++) { // checking relations
		if(g->alliance[i].guild_id==tsd->status.guild_id){
            if (g->alliance[i].opposition == 1) { // check if not already hostile
				clif_guild_oppositionack(sd,2);
				return 0;
			}
			if(agit_flag || agit2_flag) // Prevent the changing of alliances to oppositions during WoE.
				return 0;
			//Change alliance to opposition.
			intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
				sd->status.account_id,tsd->status.account_id,8 );
		}
	}

    // inform other serv
	intif_guild_alliance( sd->status.guild_id,tsd->status.guild_id,
			sd->status.account_id,tsd->status.account_id,1 );
	return 0;
}

/*====================================================
 * Notification of a relationship between 2 guilds
 *---------------------------------------------------*/
int guild_allianceack(int guild_id1,int guild_id2,int account_id1,int account_id2,int flag,const char *name1,const char *name2)
{
	struct guild *g[2];
	int guild_id[2];
	const char *guild_name[2];
	struct map_session_data *sd[2];
	int j,i;

	guild_id[0] = guild_id1;
	guild_id[1] = guild_id2;
	guild_name[0] = name1;
	guild_name[1] = name2;
	sd[0] = map_id2sd(account_id1);
	sd[1] = map_id2sd(account_id2);

	g[0]=guild_search(guild_id1);
	g[1]=guild_search(guild_id2);

	if(sd[0]!=NULL && (flag&0x0f)==0){
		sd[0]->guild_alliance=0;
		sd[0]->guild_alliance_account=0;
	}

    if (flag & 0x70) { // failure
		for(i=0;i<2-(flag&1);i++)
			if( sd[i]!=NULL )
				clif_guild_allianceack(sd[i],((flag>>4)==i+1)?3:4);
		return 0;
	}

    if (!(flag & 0x08)) { // new relationship
		for(i=0;i<2-(flag&1);i++)
		{
			if(g[i]!=NULL)
			{
				ARR_FIND( 0, MAX_GUILDALLIANCE, j, g[i]->alliance[j].guild_id == 0 );
				if( j < MAX_GUILDALLIANCE )
				{
					g[i]->alliance[j].guild_id=guild_id[1-i];
					memcpy(g[i]->alliance[j].name,guild_name[1-i],NAME_LENGTH);
					g[i]->alliance[j].opposition=flag&1;
				}
			}
		}
    } else { // remove relationship
		for(i=0;i<2-(flag&1);i++)
		{
			if(g[i]!=NULL)
			{
				ARR_FIND( 0, MAX_GUILDALLIANCE, j, g[i]->alliance[j].guild_id == guild_id[1-i] && g[i]->alliance[j].opposition == (flag&1) );
				if( j < MAX_GUILDALLIANCE )
					g[i]->alliance[j].guild_id = 0;
			}
            if (sd[i] != NULL) // notify players
				clif_guild_delalliance(sd[i],guild_id[1-i],(flag&1));
		}
	}

    if ((flag & 0x0f) == 0) { // alliance notification
		if( sd[1]!=NULL )
			clif_guild_allianceack(sd[1],2);
    } else if ((flag & 0x0f) == 1) { // enemy notification
		if( sd[0]!=NULL )
			clif_guild_oppositionack(sd[0],0);
	}


    for (i = 0; i < 2 - (flag & 1); i++) { // Retransmission of the relationship list to all members
		struct map_session_data *sd;
		if(g[i]!=NULL)
			for(j=0;j<g[i]->max_member;j++)
				if((sd=g[i]->member[j].sd)!=NULL)
					clif_guild_allianceinfo(sd);
	}
	return 0;
}

/**
 * Notification for the guild disbanded
 * @see DBApply
 */
int guild_broken_sub(DBKey key, DBData *data, va_list ap)
{
	struct guild *g = db_data2ptr(data);
	int guild_id=va_arg(ap,int);
	int i,j;
	struct map_session_data *sd=NULL;

	nullpo_ret(g);

	for(i=0;i<MAX_GUILDALLIANCE;i++){	// Destroy all relationships
		if(g->alliance[i].guild_id==guild_id){
			for(j=0;j<g->max_member;j++)
				if( (sd=g->member[j].sd)!=NULL )
					clif_guild_delalliance(sd,guild_id,g->alliance[i].opposition);
			intif_guild_alliance(g->guild_id, guild_id,0,0,g->alliance[i].opposition|8);
			g->alliance[i].guild_id=0;
		}
	}
	return 0;
}

/**
 * Invoked on Castles when a guild is broken. [Skotlex]
 * @see DBApply
 */
int castle_guild_broken_sub(DBKey key, DBData *data, va_list ap)
{
	char name[EVENT_NAME_LENGTH];
	struct guild_castle *gc = db_data2ptr(data);
	int guild_id = va_arg(ap, int);

	nullpo_ret(gc);

	if (gc->guild_id == guild_id) {
		// We call castle_event::OnGuildBreak of all castles of the guild
		// You can set all castle_events in the 'db/castle_db.txt'
		safestrncpy(name, gc->castle_event, sizeof(name));
		npc_event_do(strcat(name, "::OnGuildBreak"));

		//Save the new 'owner', this should invoke guardian clean up and other such things.
		guild_castledatasave(gc->castle_id, 1, 0);
	}
	return 0;
}

//Invoked on /breakguild "Guild name"
int guild_broken(int guild_id,int flag)
{
	struct guild *g = guild_search(guild_id);
	struct map_session_data *sd = NULL;
	int i;

	if(flag!=0 || g==NULL)
		return 0;

	for(i=0;i<g->max_member;i++){	// Destroy all relationships
		if((sd=g->member[i].sd)!=NULL){
			if(sd->state.storage_flag == 2)
				storage_guild_storage_quit(sd,1);
			sd->status.guild_id=0;
			clif_guild_broken(g->member[i].sd,0);
			clif_charnameupdate(sd); // [LuzZza]
		}
	}

	guild_db->foreach(guild_db,guild_broken_sub,guild_id);
	castle_db->foreach(castle_db,castle_guild_broken_sub,guild_id);
	guild_storage_delete(guild_id);
	idb_remove(guild_db,guild_id);
	return 0;
}

//Changes the Guild Master to the specified player. [Skotlex]
int guild_gm_change(int guild_id, struct map_session_data *sd)
{
	struct guild *g;
	nullpo_ret(sd);

	if (sd->status.guild_id != guild_id)
		return 0;
	
	g=guild_search(guild_id);

	nullpo_ret(g);

	if (strcmp(g->master, sd->status.name) == 0) //Nothing to change.
		return 0;

	//Notify servers that master has changed.
	intif_guild_change_gm(guild_id, sd->status.name, strlen(sd->status.name)+1);
	return 1;
}

//Notification from Char server that a guild's master has changed. [Skotlex]
int guild_gm_changed(int guild_id, int account_id, int char_id)
{
	struct guild *g;
	struct guild_member gm;
	int pos, i;

	g=guild_search(guild_id);

	if (!g)
		return 0;

	for(pos=0; pos<g->max_member && !(
		g->member[pos].account_id==account_id &&
		g->member[pos].char_id==char_id);
		pos++);

	if (pos == 0 || pos == g->max_member) return 0;

	memcpy(&gm, &g->member[pos], sizeof (struct guild_member));
	memcpy(&g->member[pos], &g->member[0], sizeof(struct guild_member));
	memcpy(&g->member[0], &gm, sizeof(struct guild_member));

	g->member[pos].position = g->member[0].position;
	g->member[0].position = 0; //Position 0: guild Master.
	strcpy(g->master, g->member[0].name);

	if (g->member[pos].sd && g->member[pos].sd->fd)
	{
		clif_displaymessage(g->member[pos].sd->fd, msg_txt(678)); //"You no longer are the Guild Master."
		g->member[pos].sd->state.gmaster_flag = 0;
	}
	
	if (g->member[0].sd && g->member[0].sd->fd)
	{
		clif_displaymessage(g->member[0].sd->fd, msg_txt(679)); //"You have become the Guild Master!"
		g->member[0].sd->state.gmaster_flag = g;
		//Block his skills for 5 minutes to prevent abuse.
		guild_block_skill(g->member[0].sd, 300000);
	}

	// announce the change to all guild members
	for( i = 0; i < g->max_member; i++ )
	{
		if( g->member[i].sd && g->member[i].sd->fd )
		{
			clif_guild_basicinfo(g->member[i].sd);
			clif_guild_memberlist(g->member[i].sd);
		}
	}

	return 1;
}

/*====================================================
 * Guild disbanded
 *---------------------------------------------------*/
int guild_break(struct map_session_data *sd,char *name)
{
	struct guild *g;
	int i;

	nullpo_ret(sd);

	if( (g=guild_search(sd->status.guild_id))==NULL )
		return 0;
	if(strcmp(g->name,name)!=0)
		return 0;
	if(!sd->state.gmaster_flag)
		return 0;
	for(i=0;i<g->max_member;i++){
		if(	g->member[i].account_id>0 && (
			g->member[i].account_id!=sd->status.account_id ||
			g->member[i].char_id!=sd->status.char_id ))
			break;
	}
	if(i<g->max_member){
		clif_guild_broken(sd,2);
		return 0;
	}

	intif_guild_break(g->guild_id);
	return 1;
}

/**
 * Creates a list of guild castle IDs to be requested
 * from char-server.
 */
void guild_castle_map_init(void)
{
	DBIterator* iter = NULL;
	int num = db_size(castle_db);

	if (num > 0) {
		struct guild_castle* gc = NULL;
		int *castle_ids, *cursor;

		CREATE(castle_ids, int, num);
		cursor = castle_ids;
		iter = db_iterator(castle_db);
		for (gc = dbi_first(iter); dbi_exists(iter); gc = dbi_next(iter)) {
			*(cursor++) = gc->castle_id;
		}
		dbi_destroy(iter);
		if (intif_guild_castle_dataload(num, castle_ids))
			ShowStatus("Requested '"CL_WHITE"%d"CL_RESET"' guild castles from char-server...\n", num);
		aFree(castle_ids);
	}
}

/**
 * Setter function for members of guild_castle struct.
 * Handles all side-effects, like updating guardians.
 * Sends updated info to char-server for saving.
 * @param castle_id Castle ID
 * @param index Type of data to change
 * @param value New value
 */
int guild_castledatasave(int castle_id, int index, int value)
{
	struct guild_castle *gc = guild_castle_search(castle_id);

	if (gc == NULL) {
		ShowWarning("guild_castledatasave: guild castle '%d' not found\n", castle_id);
		return 0;
	}

	switch (index) {
	case 1: // The castle's owner has changed? Update or remove Guardians too. [Skotlex]
	{
		int i;
		struct mob_data *gd;
		gc->guild_id = value;
		for (i = 0; i < MAX_GUARDIANS; i++)
			if (gc->guardian[i].visible && (gd = map_id2md(gc->guardian[i].id)) != NULL)
				mob_guardian_guildchange(gd);
		break;
	}
	case 2:
		gc->economy = value; break;
	case 3: // defense invest change -> recalculate guardian hp
	{
		int i;
		struct mob_data *gd;
		gc->defense = value;
		for (i = 0; i < MAX_GUARDIANS; i++)
			if (gc->guardian[i].visible && (gd = map_id2md(gc->guardian[i].id)) != NULL)
				status_calc_mob(gd, 0);
		break;
	}
	case 4:
		gc->triggerE = value; break;
	case 5:
		gc->triggerD = value; break;
	case 6:
		gc->nextTime = value; break;
	case 7:
		gc->payTime = value; break;
	case 8:
		gc->createTime = value; break;
	case 9:
		gc->visibleC = value; break;
	default:
		if (index > 9 && index <= 9+MAX_GUARDIANS) {
			gc->guardian[index-10].visible = value;
			break;
		}
		ShowWarning("guild_castledatasave: index = '%d' is out of allowed range\n", index);
		return 0;
	}

	if (!intif_guild_castle_datasave(castle_id, index, value)) {
		guild_castle_reconnect(castle_id, index, value);
	}
	return 0;
}

void guild_castle_reconnect_sub(void *key, void *data, va_list ap)
{
	int castle_id = GetWord((int)__64BPRTSIZE(key), 0);
	int index = GetWord((int)__64BPRTSIZE(key), 1);
	intif_guild_castle_datasave(castle_id, index, *(int *)data);
	aFree(data);
}

/**
 * Saves pending guild castle data changes when char-server is 
 * disconnected.
 * On reconnect pushes all changes to char-server for saving.
 */
void guild_castle_reconnect(int castle_id, int index, int value)
{
	static struct linkdb_node *gc_save_pending = NULL;

	if (castle_id < 0) { // char-server reconnected
		linkdb_foreach(&gc_save_pending, guild_castle_reconnect_sub);
		linkdb_final(&gc_save_pending);
	} else {
		int *data;
		CREATE(data, int, 1);
		*data = value;
		linkdb_replace(&gc_save_pending, (void*)__64BPRTSIZE((MakeDWord(castle_id, index))), data);
	}
}

// Load castle data then invoke OnAgitInit* on last
int guild_castledataloadack(int len, struct guild_castle *gc)
{
	int i;
	int n = (len-4) / sizeof(struct guild_castle);
	int ev;

	nullpo_ret(gc);

	//Last owned castle in the list invokes ::OnAgitInit
	for( i = n-1; i >= 0 && !(gc[i].guild_id); --i );
	ev = i; // offset of castle or -1

	if( ev < 0 ) { //No castles owned, invoke OnAgitInit as it is.
		npc_event_doall("OnAgitInit");
		npc_event_doall("OnAgitInit2");
	}
	else // load received castles into memory, one by one
	for( i = 0; i < n; i++, gc++ )
	{
		struct guild_castle *c = guild_castle_search(gc->castle_id);
		if (!c) {
			ShowError("guild_castledataloadack: castle id=%d not found.\n", gc->castle_id);
			continue;
		}

		// update map-server castle data with new info
		memcpy(&c->guild_id, &gc->guild_id, sizeof(struct guild_castle) - offsetof(struct guild_castle, guild_id));

		if( c->guild_id )
		{
			if( i != ev )
				guild_request_info(c->guild_id);
			else { // last owned one
				guild_npc_request_info(c->guild_id, "::OnAgitInit");
				guild_npc_request_info(c->guild_id, "::OnAgitInit2");
			}
		}
	}
	ShowStatus("Received '"CL_WHITE"%d"CL_RESET"' guild castles from char-server.\n", n);
	return 0;
}

/*====================================================
 * Start normal woe and triggers all npc OnAgitStart
 *---------------------------------------------------*/
void guild_agit_start(void)
{	// Run All NPC_Event[OnAgitStart]
	int c = npc_event_doall("OnAgitStart");
	ShowStatus("NPC_Event:[OnAgitStart] Run (%d) Events by @AgitStart.\n",c);
}

/*====================================================
 * End normal woe and triggers all npc OnAgitEnd
 *---------------------------------------------------*/
void guild_agit_end(void)
{	// Run All NPC_Event[OnAgitEnd]
	int c = npc_event_doall("OnAgitEnd");
	ShowStatus("NPC_Event:[OnAgitEnd] Run (%d) Events by @AgitEnd.\n",c);
}

/*====================================================
 * Start woe2 and triggers all npc OnAgitStart2
 *---------------------------------------------------*/
void guild_agit2_start(void)
{	// Run All NPC_Event[OnAgitStart2]
	int c = npc_event_doall("OnAgitStart2");
	ShowStatus("NPC_Event:[OnAgitStart2] Run (%d) Events by @AgitStart2.\n",c);
}

/*====================================================
 * End woe2 and triggers all npc OnAgitEnd2
 *---------------------------------------------------*/
void guild_agit2_end(void)
{	// Run All NPC_Event[OnAgitEnd2]
	int c = npc_event_doall("OnAgitEnd2");
	ShowStatus("NPC_Event:[OnAgitEnd2] Run (%d) Events by @AgitEnd2.\n",c);
}

// How many castles does this guild have?
int guild_checkcastles(struct guild *g)
{
	int nb_cas = 0;
	struct guild_castle* gc = NULL;
	DBIterator *iter = db_iterator(castle_db);

	for (gc = dbi_first(iter); dbi_exists(iter); gc = dbi_next(iter)) {
		if (gc->guild_id == g->guild_id) {
			nb_cas++;
		}
	}
	dbi_destroy(iter);
	return nb_cas;
}

// Are these two guilds allied?
bool guild_isallied(int guild_id, int guild_id2)
{
	int i;
	struct guild* g = guild_search(guild_id);
	nullpo_ret(g);

	ARR_FIND( 0, MAX_GUILDALLIANCE, i, g->alliance[i].guild_id == guild_id2 );
	return( i < MAX_GUILDALLIANCE && g->alliance[i].opposition == 0 );
}

void guild_flag_add(struct npc_data *nd) {
	int i;
	
	/* check */
	for( i = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] && guild_flags[i]->bl.id == nd->bl.id ) {
			return;/* exists, most likely updated the id. */
		}
	}

	i = guild_flags_count;/* save the current slot */
	/* add */
	RECREATE(guild_flags,struct npc_data*,++guild_flags_count);
	/* save */
	guild_flags[i] = nd;
}

void guild_flag_remove(struct npc_data *nd) {
	int i, cursor;
	if( guild_flags_count == 0 )
		return;
	/* find it */
	for( i = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] && guild_flags[i]->bl.id == nd->bl.id ) {/* found */
			guild_flags[i] = NULL;
			break;
		}
	}

	/* compact list */
	for( i = 0, cursor = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] == NULL )
			continue;
		
		if( cursor != i ) {
			memmove(&guild_flags[cursor], &guild_flags[i], sizeof(struct npc_data*));
		}
		
		cursor++;
	}

}

/**
 * @see DBApply
 */
static int eventlist_db_final(DBKey key, DBData *data, va_list ap) {
	struct eventlist *next = NULL;
	struct eventlist *current = db_data2ptr(data);
	while (current != NULL) {
		next = current->next;
		aFree(current);
		current = next;
	}
	return 0;
}

/**
 * @see DBApply
 */
static int guild_expcache_db_final(DBKey key, DBData *data, va_list ap) {
	ers_free(expcache_ers, db_data2ptr(data));
	return 0;
}

/**
 * @see DBApply
 */
static int guild_castle_db_final(DBKey key, DBData *data, va_list ap) {
	struct guild_castle* gc = db_data2ptr(data);
	if( gc->temp_guardians )
		aFree(gc->temp_guardians);
	aFree(gc);
	return 0;
}

/* called when scripts are reloaded/unloaded */
void guild_flags_clear(void) {
	int i;
	for( i = 0; i < guild_flags_count; i++ ) {
		if( guild_flags[i] )
			guild_flags[i] = NULL;
	}
	
	guild_flags_count = 0;
}

void do_init_guild(void) {
	guild_db           = idb_alloc(DB_OPT_RELEASE_DATA);
	castle_db          = idb_alloc(DB_OPT_BASE);
	guild_expcache_db  = idb_alloc(DB_OPT_BASE);
	guild_infoevent_db = idb_alloc(DB_OPT_BASE);
	expcache_ers = ers_new(sizeof(struct guild_expcache),"guild.c::expcache_ers",ERS_OPT_NONE);
	
	guild_flags_count = 0;
	
	sv_readdb(db_path, "castle_db.txt", ',', 4, 5, -1, &guild_read_castledb);

	memset(guild_skill_tree,0,sizeof(guild_skill_tree));
	sv_readdb(db_path, "guild_skill_tree.txt", ',', 2+MAX_GUILD_SKILL_REQUIRE*2, 2+MAX_GUILD_SKILL_REQUIRE*2, -1, &guild_read_guildskill_tree_db); //guild skill tree [Komurka]

	add_timer_func_list(guild_payexp_timer,"guild_payexp_timer");
	add_timer_func_list(guild_send_xy_timer, "guild_send_xy_timer");
	add_timer_interval(gettick()+GUILD_PAYEXP_INVERVAL,guild_payexp_timer,0,0,GUILD_PAYEXP_INVERVAL);
	add_timer_interval(gettick()+GUILD_SEND_XY_INVERVAL,guild_send_xy_timer,0,0,GUILD_SEND_XY_INVERVAL);
}

void do_final_guild(void) {
	
	db_destroy(guild_db);
	castle_db->destroy(castle_db,guild_castle_db_final);
	guild_expcache_db->destroy(guild_expcache_db,guild_expcache_db_final);
	guild_infoevent_db->destroy(guild_infoevent_db,eventlist_db_final);
	ers_destroy(expcache_ers);
			
	aFree(guild_flags);/* never empty; created on boot */
}