libpurple/protocols/msn/userlist.c

/**
 * @file userlist.c MSN user list support
 *
 * purple
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "msn.h"
#include "userlist.h"

const char *lists[] = { "FL", "AL", "BL", "RL" };

typedef struct
{
	PurpleConnection *gc;
	char *who;
	char *friendly;

} MsnPermitAdd;

/**************************************************************************
 * Callbacks
 **************************************************************************/
static void
msn_accept_add_cb(MsnPermitAdd *pa)
{
	MsnSession *session = pa->gc->proto_data;
	MsnUserList *userlist = session->userlist;

	msn_userlist_add_buddy(userlist, pa->who, MSN_LIST_AL, NULL);

	g_free(pa->who);
	g_free(pa->friendly);
	g_free(pa);
}

static void
msn_cancel_add_cb(MsnPermitAdd *pa)
{
	if (g_list_find(purple_connections_get_all(), pa->gc) != NULL)
	{
		MsnSession *session = pa->gc->proto_data;
		MsnUserList *userlist = session->userlist;

		msn_userlist_add_buddy(userlist, pa->who, MSN_LIST_BL, NULL);
	}

	g_free(pa->who);
	g_free(pa->friendly);
	g_free(pa);
}

static void
got_new_entry(PurpleConnection *gc, const char *passport, const char *friendly)
{
	MsnPermitAdd *pa;

	pa = g_new0(MsnPermitAdd, 1);
	pa->who = g_strdup(passport);
	pa->friendly = g_strdup(friendly);
	pa->gc = gc;
	
	purple_account_request_authorization(purple_connection_get_account(gc), passport, NULL, friendly, NULL,
					   purple_find_buddy(purple_connection_get_account(gc), passport) != NULL,
					   G_CALLBACK(msn_accept_add_cb), G_CALLBACK(msn_cancel_add_cb), pa);

}

/**************************************************************************
 * Utility functions
 **************************************************************************/

static gboolean
user_is_in_group(MsnUser *user, const char * group_id)
{
	if (user == NULL)
		return FALSE;

	if (group_id == NULL)
		return FALSE;

	if (g_list_find_custom(user->group_ids, group_id, (GCompareFunc)strcmp))
		return TRUE;

	return FALSE;
}

static gboolean
user_is_there(MsnUser *user, int list_id, const char * group_id)
{
	int list_op;

	if (user == NULL)
		return FALSE;

	list_op = 1 << list_id;

	if (!(user->list_op & list_op))
		return FALSE;

	if (list_id == MSN_LIST_FL)
	{
		if (group_id != NULL)
			return user_is_in_group(user, group_id);
	}

	return TRUE;
}

static const char*
get_store_name(MsnUser *user)
{
	const char *store_name;

	g_return_val_if_fail(user != NULL, NULL);

	store_name = msn_user_get_store_name(user);

	if (store_name != NULL)
		store_name = purple_url_encode(store_name);
	else
		store_name = msn_user_get_passport(user);

	/* this might be a bit of a hack, but it should prevent notification server
	 * disconnections for people who have buddies with insane friendly names
	 * who added you to their buddy list from being disconnected. Stu. */
	/* Shx: What? Isn't the store_name obtained from the server, and hence it's
	 * below the BUDDY_ALIAS_MAXLEN ? */
	/* Stu: yeah, that's why it's a bit of a hack, as you pointed out, we're
	 * probably decoding the incoming store_name wrong, or something. bleh. */

	if (strlen(store_name) > BUDDY_ALIAS_MAXLEN)
		store_name = msn_user_get_passport(user);

	return store_name;
}

static void
msn_request_add_group(MsnUserList *userlist, const char *who,
					  const char *old_group_name, const char *new_group_name)
{
	MsnSession *session;
	MsnCmdProc *cmdproc;
	MsnMoveBuddy *data;

	session = userlist->session;
	cmdproc = session->notification->cmdproc;
	data = g_new0(MsnMoveBuddy, 1);

	data->who = g_strdup(who);

	if (old_group_name)
	{
		data->old_group_name = g_strdup(old_group_name);
		/*delete the old group via SOAP action*/
		msn_del_group(session,old_group_name);
	}

	/*add new group via SOAP action*/
	msn_add_group(session, new_group_name);

}

/**************************************************************************
 * Server functions
 **************************************************************************/

MsnListId
msn_get_list_id(const char *list)
{
	if (list[0] == 'F')
		return MSN_LIST_FL;
	else if (list[0] == 'A')
		return MSN_LIST_AL;
	else if (list[0] == 'B')
		return MSN_LIST_BL;
	else if (list[0] == 'R')
		return MSN_LIST_RL;

	return -1;
}

/* this function msn_got_add_user isn't called anywhere */
void
msn_got_add_user(MsnSession *session, MsnUser *user,
				 MsnListId list_id, const char * group_id)
{
	PurpleAccount *account;
	const char *passport;
	const char *friendly;

	purple_debug_info("MSNP14","got add user...\n");
	account = session->account;

	passport = msn_user_get_passport(user);
	friendly = msn_user_get_friendly_name(user);

	if (list_id == MSN_LIST_FL)
	{
		PurpleConnection *gc;

		gc = purple_account_get_connection(account);

		serv_got_alias(gc, passport, friendly);

		if (group_id != NULL)
		{
			msn_user_add_group_id(user, group_id);
		}
		else
		{
			/* session->sync->fl_users_count++; */
		}
	}
	else if (list_id == MSN_LIST_AL)
	{
		purple_privacy_permit_add(account, passport, TRUE);
	}
	else if (list_id == MSN_LIST_BL)
	{
		purple_privacy_deny_add(account, passport, TRUE);
	}
	else if (list_id == MSN_LIST_RL)
	{
		PurpleConnection *gc;
		PurpleConversation *convo;

		gc = purple_account_get_connection(account);

		purple_debug_info("msn",
						"%s has added you to his or her buddy list.\n",
						passport);

 		convo = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, passport, account);
 		if (convo) {
 			PurpleBuddy *buddy;
 			char *msg;
 
 			buddy = purple_find_buddy(account, passport);
 			msg = g_strdup_printf(
 				_("%s has added you to his or her buddy list."),
 				buddy ? purple_buddy_get_contact_alias(buddy) : passport);
 			purple_conv_im_write(PURPLE_CONV_IM(convo), passport, msg,
 				PURPLE_MESSAGE_SYSTEM, time(NULL));
 			g_free(msg);
 		}
 
		if (!(user->list_op & (MSN_LIST_AL_OP | MSN_LIST_BL_OP)))
		{
			/*
			 * TODO: The friendly name was NULL for me when I
			 *       looked at this.  Maybe we should use the store
			 *       name instead? --KingAnt
			 */
//			got_new_entry(gc, passport, friendly);
		}
	}

	user->list_op |= (1 << list_id);
	/* purple_user_add_list_id (user, list_id); */
}

void
msn_got_rem_user(MsnSession *session, MsnUser *user,
				 MsnListId list_id, const char * group_id)
{
	PurpleAccount *account;
	const char *passport;

	account = session->account;

	passport = msn_user_get_passport(user);

	if (list_id == MSN_LIST_FL)
	{
		/* TODO: When is the user totally removed? */
		if (group_id != NULL)
		{
			msn_user_remove_group_id(user, group_id);
			return;
		}
		else
		{
			/* session->sync->fl_users_count--; */
		}
	}
	else if (list_id == MSN_LIST_AL)
	{
		purple_privacy_permit_remove(account, passport, TRUE);
	}
	else if (list_id == MSN_LIST_BL)
	{
		purple_privacy_deny_remove(account, passport, TRUE);
	}
	else if (list_id == MSN_LIST_RL)
	{
		PurpleConversation *convo;

		purple_debug_info("msn",
						"%s has removed you from his or her buddy list.\n",
						passport);

		convo = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, passport, account);
		if (convo) {
			PurpleBuddy *buddy;
			char *msg;

			buddy = purple_find_buddy(account, passport);
			msg = g_strdup_printf(
				_("%s has removed you from his or her buddy list."),
				buddy ? purple_buddy_get_contact_alias(buddy) : passport);
			purple_conv_im_write(PURPLE_CONV_IM(convo), passport, msg,
				PURPLE_MESSAGE_SYSTEM, time(NULL));
			g_free(msg);
		}
	}

	user->list_op &= ~(1 << list_id);
	/* purple_user_remove_list_id (user, list_id); */

	if (user->list_op == 0)
	{
		purple_debug_info("msn", "Buddy '%s' shall be deleted?.\n",
						passport);
	}
}

void
msn_got_lst_user(MsnSession *session, MsnUser *user,
				 int list_op, GSList *group_ids)
{
	PurpleConnection *gc;
	PurpleAccount *account;
	const char *passport;
	const char *store;

	account = session->account;
	gc = purple_account_get_connection(account);

	passport = msn_user_get_passport(user);
	store = msn_user_get_store_name(user);

	if (list_op & MSN_LIST_FL_OP)
	{
		GSList *c;
		for (c = group_ids; c != NULL; c = g_slist_next(c))
		{
			char *group_id;
			group_id = c->data;
			msn_user_add_group_id(user, group_id);
		}

		/* FIXME: It might be a real alias */
		/* Umm, what? This might fix bug #1385130 */
		serv_got_alias(gc, passport, store);
	}

	if (list_op & MSN_LIST_AL_OP)
	{
		/* These are users who are allowed to see our status. */
		purple_privacy_deny_remove(account, passport, TRUE);
		purple_privacy_permit_add(account, passport, TRUE);
	}

	if (list_op & MSN_LIST_BL_OP)
	{
		/* These are users who are not allowed to see our status. */
		purple_privacy_permit_remove(account, passport, TRUE);
		purple_privacy_deny_add(account, passport, TRUE);
	}

	if (list_op & MSN_LIST_RL_OP)
	{
		/* These are users who have us on their buddy list. */
		/*
		 * TODO: What is store name set to when this happens?
		 *       For one of my accounts "something@hotmail.com"
		 *       the store name was "something."  Maybe we
		 *       should use the friendly name, instead? --KingAnt
		 */

		if (!(list_op & (MSN_LIST_AL_OP | MSN_LIST_BL_OP)))
		{
//			got_new_entry(gc, passport, store);
		}
	}

	user->list_op |= list_op;
}

/**************************************************************************
 * UserList functions
 **************************************************************************/

MsnUserList*
msn_userlist_new(MsnSession *session)
{
	MsnUserList *userlist;

	userlist = g_new0(MsnUserList, 1);

	userlist->session = session;
	userlist->buddy_icon_requests = g_queue_new();
	
	/* buddy_icon_window is the number of allowed simultaneous buddy icon requests.
	 * XXX With smarter rate limiting code, we could allow more at once... 5 was the limit set when
	 * we weren't retrieiving any more than 5 per MSN session. */
	userlist->buddy_icon_window = 1;

	return userlist;
}

void
msn_userlist_destroy(MsnUserList *userlist)
{
	GList *l;

	/*destroy userlist*/
	for (l = userlist->users; l != NULL; l = l->next)
	{
		msn_user_destroy(l->data);
	}
	g_list_free(userlist->users);

	/*destroy group list*/
	for (l = userlist->groups; l != NULL; l = l->next)
	{
		msn_group_destroy(l->data);
	}
	g_list_free(userlist->groups);

	g_queue_free(userlist->buddy_icon_requests);

	if (userlist->buddy_icon_request_timer)
		purple_timeout_remove(userlist->buddy_icon_request_timer);

	g_free(userlist);
}

MsnUser *
msn_userlist_find_add_user(MsnUserList *userlist,const char *passport,const char *userName)
{
	MsnUser *user;

	user = msn_userlist_find_user(userlist, passport);
	if (user == NULL)
	{
		user = msn_user_new(userlist, passport, userName);
		msn_userlist_add_user(userlist, user);
	}
	msn_user_set_store_name(user, userName);
	return user;
}

void
msn_userlist_add_user(MsnUserList *userlist, MsnUser *user)
{
	userlist->users = g_list_append(userlist->users, user);
}

void
msn_userlist_remove_user(MsnUserList *userlist, MsnUser *user)
{
	userlist->users = g_list_remove(userlist->users, user);
}

MsnUser *
msn_userlist_find_user(MsnUserList *userlist, const char *passport)
{
	GList *l;

	g_return_val_if_fail(passport != NULL, NULL);

	for (l = userlist->users; l != NULL; l = l->next)
	{
		MsnUser *user = (MsnUser *)l->data;
//		purple_debug_info("MsnUserList","user passport:%s,passport:%s\n",user->passport,passport);
		g_return_val_if_fail(user->passport != NULL, NULL);

		if (!g_strcasecmp(passport, user->passport)){
//			purple_debug_info("MsnUserList","return:%p\n",user);
			return user;
		}
	}

	return NULL;
}

void
msn_userlist_add_group(MsnUserList *userlist, MsnGroup *group)
{
	userlist->groups = g_list_append(userlist->groups, group);
}

void
msn_userlist_remove_group(MsnUserList *userlist, MsnGroup *group)
{
	userlist->groups = g_list_remove(userlist->groups, group);
}

MsnGroup *
msn_userlist_find_group_with_id(MsnUserList *userlist, const char * id)
{
	GList *l;

	g_return_val_if_fail(userlist != NULL, NULL);
	g_return_val_if_fail(id       != NULL, NULL);

	for (l = userlist->groups; l != NULL; l = l->next)
	{
		MsnGroup *group = l->data;

		if (!g_strcasecmp(group->id,id))
			return group;
	}

	return NULL;
}

MsnGroup *
msn_userlist_find_group_with_name(MsnUserList *userlist, const char *name)
{
	GList *l;

	g_return_val_if_fail(userlist != NULL, NULL);
	g_return_val_if_fail(name     != NULL, NULL);

	for (l = userlist->groups; l != NULL; l = l->next)
	{
		MsnGroup *group = l->data;

		if ((group->name != NULL) && !g_strcasecmp(name, group->name))
			return group;
	}

	return NULL;
}

const char *
msn_userlist_find_group_id(MsnUserList *userlist, const char *group_name)
{
	MsnGroup *group;

	group = msn_userlist_find_group_with_name(userlist, group_name);

	if (group != NULL)
		return msn_group_get_id(group);
	else
		return NULL;
}

const char *
msn_userlist_find_group_name(MsnUserList *userlist, const char * group_id)
{
	MsnGroup *group;

	group = msn_userlist_find_group_with_id(userlist, group_id);

	if (group != NULL)
		return msn_group_get_name(group);
	else
		return NULL;
}

void
msn_userlist_rename_group_id(MsnUserList *userlist, const char * group_id,
							 const char *new_name)
{
	MsnGroup *group;

	group = msn_userlist_find_group_with_id(userlist, group_id);

	if (group != NULL)
		msn_group_set_name(group, new_name);
}

void
msn_userlist_remove_group_id(MsnUserList *userlist, const char * group_id)
{
	MsnGroup *group;

	group = msn_userlist_find_group_with_id(userlist, group_id);

	if (group != NULL)
	{
		msn_userlist_remove_group(userlist, group);
		msn_group_destroy(group);
	}
}

void
msn_userlist_rem_buddy(MsnUserList *userlist,
					   const char *who, int list_id, const char *group_name)
{
	MsnUser *user;
	const char *group_id;
	const char *list;

	user = msn_userlist_find_user(userlist, who);

	g_return_if_fail(user != NULL);

	/*delete the contact from address book via soap action*/
	msn_delete_contact(userlist->session->contact,user->uid);

	group_id = NULL;

	if (group_name != NULL)
	{
		group_id = msn_userlist_find_group_id(userlist, group_name);

		if (group_id == NULL)
		{
			/* Whoa, there is no such group. */
			purple_debug_error("msn", "Group doesn't exist: %s\n", group_name);
			return;
		}
	}

	/* First we're going to check if not there. */
	if (!(user_is_there(user, list_id, group_id)))
	{
		list = lists[list_id];
		purple_debug_error("msn", "User '%s' is not there: %s\n",
						 who, list);
		return;
	}

	/* Then request the rem to the server. */
	list = lists[list_id];

	msn_notification_rem_buddy(userlist->session->notification, list, who, group_id);
}

/*add buddy*/
void
msn_userlist_add_buddy(MsnUserList *userlist,
					   const char *who, int list_id,
					   const char *group_name)
{
	MsnUser *user;
	const char *group_id;
	const char *list;
	const char *store_name;

	purple_debug_info("MSNP14", "userlist add buddy,name:{%s},group:{%s}\n",who ,group_name);
	group_id = NULL;

	if (!purple_email_is_valid(who))
	{
		/* only notify the user about problems adding to the friends list
		 * maybe we should do something else for other lists, but it probably
		 * won't cause too many problems if we just ignore it */
		if (list_id == MSN_LIST_FL)
		{
			char *str = g_strdup_printf(_("Unable to add \"%s\"."), who);
			purple_notify_error(NULL, NULL, str,
							  _("The screen name specified is invalid."));
			g_free(str);
		}

		return;
	}

	if (group_name != NULL)
	{
		group_id = msn_userlist_find_group_id(userlist, group_name);

		if (group_id == NULL)
		{
			/* Whoa, we must add that group first. */
			msn_request_add_group(userlist, who, NULL, group_name);
			return;
		}
	}

	/* XXX: using _add_user here may not be correct (should add them in the
	   ACK to the ADL command, and we might also want to make sure the user's groups
	   are correct. but for now we need to make sure they exist early enough that
	   the ILN command doesn't screw us up */
	user = msn_userlist_find_add_user(userlist, who, who);

	/* First we're going to check if it's already there. */
	if (user_is_there(user, list_id, group_id))
	{
		list = lists[list_id];
		purple_debug_error("msn", "User '%s' is already there: %s\n", who, list);
		return;
	}

	store_name = (user != NULL) ? get_store_name(user) : who;

	/* XXX: see XXX above, this should really be done when we get the response from
	   the server */
	msn_user_set_op(user, list_id);

	/* Then request the add to the server. */
	list = lists[list_id];

	purple_debug_info("MSNP14", "add user:{%s} to group id {%s}\n",store_name ,group_id);
	msn_add_contact(userlist->session->contact,who,group_id);
	msn_notification_add_buddy(userlist->session->notification, list, who,
							   store_name, group_id);
}

void
msn_userlist_move_buddy(MsnUserList *userlist, const char *who,
						const char *old_group_name, const char *new_group_name)
{
	const char *new_group_id;

	new_group_id = msn_userlist_find_group_id(userlist, new_group_name);

	if (new_group_id == NULL)
	{
		msn_request_add_group(userlist, who, old_group_name, new_group_name);
		return;
	}

	msn_userlist_add_buddy(userlist, who, MSN_LIST_FL, new_group_name);
	msn_userlist_rem_buddy(userlist, who, MSN_LIST_FL, old_group_name);
}

/*load userlist from the Blist file cache*/
void
msn_userlist_load(MsnSession *session)
{
	PurpleBlistNode *gnode, *cnode, *bnode;
	PurpleConnection *gc = purple_account_get_connection(session->account);
	GSList *l;
	MsnUser * user;

	purple_debug_info("::","msn_userlist_load()\n");

	g_return_if_fail(gc != NULL);

	for (gnode = purple_get_blist()->root; gnode; gnode = gnode->next)
	{
		if (!PURPLE_BLIST_NODE_IS_GROUP(gnode))
			continue;
		for (cnode = gnode->child; cnode; cnode = cnode->next)
		{
			if (!PURPLE_BLIST_NODE_IS_CONTACT(cnode))
				continue;
			for (bnode = cnode->child; bnode; bnode = bnode->next)
			{
				PurpleBuddy *b;
				if (!PURPLE_BLIST_NODE_IS_BUDDY(bnode))
					continue;
				b = (PurpleBuddy *)bnode;
				if (b->account == gc->account)
				{
					user = msn_userlist_find_add_user(session->userlist,
						b->name,NULL);
					b->proto_data = user;
					msn_user_set_op(user, MSN_LIST_FL_OP);
				}
			}
		}
	}
	for (l = session->account->permit; l != NULL; l = l->next)
	{
		user = msn_userlist_find_add_user(session->userlist,
						(char *)l->data,NULL);
		msn_user_set_op(user, MSN_LIST_AL_OP);
	}
	for (l = session->account->deny; l != NULL; l = l->next)
	{
		user = msn_userlist_find_add_user(session->userlist,
						(char *)l->data,NULL);
		msn_user_set_op(user, MSN_LIST_BL_OP);
	}
	
}