libpurple/protocols/yahoo/yahoo_aliases.c

/*
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 *
 */


#include "internal.h"

#include "account.h"
#include "accountopt.h"
#include "blist.h"
#include "debug.h"
#include "util.h"
#include "version.h"
#include "yahoo.h"
#include "yahoo_aliases.h"
#include "yahoo_packet.h"

/* I hate hardcoding this stuff, but Yahoo never sends us anything to use.  Someone in the know may be able to tweak this URL */
#define YAHOO_ALIAS_FETCH_URL "http://address.yahoo.com/yab/us?v=XM&prog=ymsgr&.intl=us&diffs=1&t=0&tags=short&rt=0&prog-ver=8.1.0.249&useutf8=1&legenc=codepage-1252"
#define YAHOO_ALIAS_UPDATE_URL "http://address.yahoo.com/yab/us?v=XM&prog=ymsgr&.intl=us&sync=1&tags=short&noclear=1&useutf8=1&legenc=codepage-1252"

void yahoo_update_alias(PurpleConnection *gc, const char *who, const char *alias);

/**
 * Stuff we want passed to the callback function
 */
struct callback_data {
	PurpleConnection *gc;
	char *id;
};


/**************************************************************************
 * Alias Fetch Functions
 **************************************************************************/

static void
yahoo_fetch_aliases_cb(PurpleUtilFetchUrlData *url_data, gpointer user_data,const gchar *url_text, size_t len, const gchar *error_message)
{
	struct callback_data *cb = user_data;
	PurpleConnection *gc = cb->gc;
	struct yahoo_data *yd = gc->proto_data;

	yd->url_datas = g_slist_remove(yd->url_datas, url_data);

	if (len == 0) {
		purple_debug_info("yahoo","No Aliases to process\n");
	} else {
		const char *yid, *full_name, *nick_name, *alias, *id, *fn, *ln, *nn;
		PurpleBuddy *b = NULL;
		xmlnode *item, *contacts;

		/* Put our web response into a xmlnode for easy management */
		contacts = xmlnode_from_str(url_text, -1);

		if (contacts == NULL) {
			purple_debug_error("yahoo_aliases","Badly formed XML\n");
			return;
		}
		purple_debug_info("yahoo", "Fetched %i bytes of alias data\n", len);

		/* Loop around and around and around until we have gone through all the received aliases  */
		for(item = xmlnode_get_child(contacts, "ct"); item; item = xmlnode_get_next_twin(item)) {
			/* Yahoo replies with two types of contact (ct) record, we are only interested in the alias ones */
			if ((yid = xmlnode_get_attrib(item, "yi"))) {
		                /* Grab all the bits of information we can */
				fn = xmlnode_get_attrib(item,"fn");
				ln = xmlnode_get_attrib(item,"ln");
				nn = xmlnode_get_attrib(item,"nn");
				id = xmlnode_get_attrib(item,"id");

		                /* Yahoo stores first and last names separately, lets put them together into a full name */
				full_name = g_strstrip(g_strdup_printf("%s %s", (fn != NULL ? fn : "") , (ln != NULL ? ln : "")));
				nick_name = (nn != NULL ? g_strstrip(g_strdup_printf("%s", nn)) : NULL);

				if (nick_name != NULL)
					alias = nick_name;   /* If we have a nickname from Yahoo, let's use it */
				else if (strlen(full_name) != 0)
					alias = full_name;  /* If no Yahoo nickname, we can use the full_name created above */
				else
					alias = NULL;  /* No nickname, first name or last name, then you get no alias !!  */

				/*  Find the local buddy that matches */
				b = purple_find_buddy(cb->gc->account, yid);

				/*  If we don't find a matching buddy, ignore the alias !!  */
				if (b != NULL) {
					/* Create an object that we can attach to the buddies proto_data pointer */
					struct YahooUser *yu;
					yu = g_new0(struct YahooUser, 1);
					yu->id = g_strdup(id);
					yu->firstname = g_strdup(fn);
					yu->lastname = g_strdup(ln);
					yu->nickname = g_strdup(nn);
					b->proto_data=yu;

					/* Finally, if we received an alias, we better update the buddy list */
					if (alias != NULL) {
						serv_got_alias(cb->gc, yid, alias);
						purple_debug_info("yahoo","Fetched alias '%s' (%s)\n",alias,id);
					} else if (g_strcasecmp((alias!=NULL?alias:""),(b->alias!=NULL?b->alias:"")) != 0) {
					/* Or if we have an alias that Yahoo doesn't, send it up */
						yahoo_update_alias(cb->gc, yid, b->alias);
						purple_debug_info("yahoo","Sent alias '%s'\n", b->alias);
					}
				} else {
					purple_debug_info("yahoo", "Bizarre, received alias for %s, but they are not on your list...\n", yid);
				}
			}
		}
		xmlnode_free(contacts);
	}
	g_free(cb->id);
	g_free(cb);
}

void
yahoo_fetch_aliases(PurpleConnection *gc)
{
	struct yahoo_data *yd = gc->proto_data;
	struct callback_data *cb;
	char *url, *request, *webpage, *webaddress, *strtmp;
	int inttmp;
	PurpleUtilFetchUrlData *url_data;

	/* Using callback_data so I have access to gc in the callback function */
	cb = g_new0(struct callback_data, 1);
	cb->gc = gc;

	/*  Build all the info to make the web request */
	url = g_strdup(YAHOO_ALIAS_FETCH_URL);
	purple_url_parse(url, &webaddress, &inttmp, &webpage, &strtmp, &strtmp);
	request = g_strdup_printf("GET /%s HTTP/1.1\r\n"
				 "User-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\n"
				 "Cookie: T=%s; Y=%s\r\n"
				 "Host: %s\r\n"
				 "Cache-Control: no-cache\r\n\r\n",
				 webpage, yd->cookie_t,yd->cookie_y, webaddress);

	/* We have a URL and some header information, let's connect and get some aliases  */
	url_data = purple_util_fetch_url_request(url, FALSE, NULL, TRUE, request, FALSE, yahoo_fetch_aliases_cb, cb);
	if (url_data != NULL) {
		yd->url_datas = g_slist_prepend(yd->url_datas, url_data);
	} else {
		g_free(cb);
	}

	g_free(url);
	g_free(request);
}

/**************************************************************************
 * Alias Update Functions
 **************************************************************************/

static void
yahoo_update_alias_cb(PurpleUtilFetchUrlData *url_data, gpointer user_data,const gchar *url_text, size_t len, const gchar *error_message)
{
	xmlnode *node, *result;
	struct callback_data *cb = user_data;
	PurpleConnection *gc = cb->gc;
	struct yahoo_data *yd;

	yd = gc->proto_data;
	yd->url_datas = g_slist_remove(yd->url_datas, url_data);

	result = xmlnode_from_str(url_text, -1);

	purple_debug_info("yahoo", "ID: %s, Return data: %s\n",cb->id, url_text);

	if (result == NULL) {
		purple_debug_error("yahoo","Alias update faild: Badly formed response\n");
		return;
	}

	if ((node = xmlnode_get_child(result, "ct"))) {
		if (g_ascii_strncasecmp(xmlnode_get_attrib(node, "id"), cb->id, strlen(cb->id))==0)
			purple_debug_info("yahoo", "Alias update succeeded\n");
		else
			purple_debug_error("yahoo", "Alias update failed (Contact record return mismatch)\n");
	} else {
		purple_debug_info("yahoo", "Alias update failed (No contact record returned)\n");
	}

	g_free(cb->id);
	g_free(cb);
	xmlnode_free(result);
}

void
yahoo_update_alias(PurpleConnection *gc, const char *who, const char *alias)
{
	struct yahoo_data *yd;
	struct YahooUser *yu;
	char *content, *url, *request, *webpage, *webaddress, *strtmp;
	int inttmp;
	struct callback_data *cb;
	PurpleBuddy *buddy;
	PurpleUtilFetchUrlData *url_data;
   
	g_return_if_fail(alias!= NULL);
	g_return_if_fail(who!=NULL);
	g_return_if_fail(gc!=NULL);

	purple_debug_info("yahoo", "Sending '%s' as new alias for user '%s'.\n",alias, who);

	buddy = purple_find_buddy(gc->account, who);
	if (buddy->proto_data == NULL) {
		purple_debug_info("yahoo", "Missing proto_data (get_yahoo_aliases must have failed), bailing out\n");
		return;
	}

	yd = gc->proto_data;
	yu = buddy->proto_data;

	/* Using callback_data so I have access to gc in the callback function */
	cb = g_new0(struct callback_data, 1);
	cb->id = g_strdup(yu->id);
	cb->gc = gc;

	/*  Build all the info to make the web request */
	url = g_strdup(YAHOO_ALIAS_UPDATE_URL);
	purple_url_parse(url, &webaddress, &inttmp, &webpage, &strtmp, &strtmp);

	content = g_strdup_printf("<?xml version=\"1.0\" encoding=\"utf-8\"?><ab k=\"%s\" cc=\"1\">\n"
				  "<ct e=\"1\"  yi='%s' id='%s' nn='%s' pr='0' />\n</ab>\r\n",
				  gc->account->username, who, yu->id, g_markup_escape_text(alias, strlen(alias)));

	request = g_strdup_printf("POST /%s HTTP/1.1\r\n"
				  "User-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\n"
				  "Cookie: T=%s; Y=%s\r\n"
				  "Host: %s\r\n"
				  "Content-Length: %" G_GSIZE_FORMAT "\r\n"
				  "Cache-Control: no-cache\r\n\r\n"
				  "%s",
				  webpage, yd->cookie_t,yd->cookie_y, webaddress,
			 	  strlen(content), content);

	/* We have a URL and some header information, let's connect and update the alias  */
	url_data = purple_util_fetch_url_request(url, FALSE, NULL, TRUE, request, FALSE, yahoo_update_alias_cb, cb);
	if (url_data != NULL) {
		yd->url_datas = g_slist_prepend(yd->url_datas, url_data);
	} else {
		g_free(cb->id);
		g_free(cb);
	}

	g_free(content);
	g_free(url);
	g_free(request);
}