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profanity/src/xmpp/avatar.c

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/*
* avatar.c
* vim: expandtab:ts=4:sts=4:sw=4
*
* Copyright (C) 2019 - 2021 Michael Vetter <jubalh@iodoru.org>
*
* This file is part of Profanity.
*
* Profanity 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 3 of the License, or
* (at your option) any later version.
*
* Profanity 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 Profanity. If not, see <https://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give permission to
* link the code of portions of this program with the OpenSSL library under
* certain conditions as described in each individual source file, and
* distribute linked combinations including the two.
*
* You must obey the GNU General Public License in all respects for all of the
* code used other than OpenSSL. If you modify file(s) with this exception, you
* may extend this exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this exception
* statement from your version. If you delete this exception statement from all
* source files in the program, then also delete it here.
*
*/
#include "config.h"
#include <glib.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include "log.h"
#include "xmpp/connection.h"
#include "xmpp/iq.h"
#include "xmpp/message.h"
#include "xmpp/stanza.h"
#include "ui/ui.h"
#include "config/files.h"
#include "config/preferences.h"
typedef struct avatar_metadata
{
char* type;
char* id;
} avatar_metadata;
static GHashTable* looking_for = NULL; // contains nicks/barejids from who we want to get the avatar
static GHashTable* shall_open = NULL; // contains a list of nicks that shall not just downloaded but also opened
static void _avatar_request_item_by_id(const char* jid, avatar_metadata* data);
static int _avatar_metadata_handler(xmpp_stanza_t* const stanza, void* const userdata);
static int _avatar_request_item_result_handler(xmpp_stanza_t* const stanza, void* const userdata);
static void
_free_avatar_data(avatar_metadata* data)
{
if (data) {
free(data->type);
free(data);
}
}
void
avatar_pep_subscribe(void)
{
message_pubsub_event_handler_add(STANZA_NS_USER_AVATAR_METADATA, _avatar_metadata_handler, NULL, NULL);
message_pubsub_event_handler_add(STANZA_NS_USER_AVATAR_DATA, _avatar_metadata_handler, NULL, NULL);
// caps_add_feature(XMPP_FEATURE_USER_AVATAR_METADATA_NOTIFY);
if (looking_for) {
g_hash_table_destroy(looking_for);
}
looking_for = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
if (shall_open) {
g_hash_table_destroy(shall_open);
}
shall_open = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
}
gboolean
avatar_get_by_nick(const char* nick, gboolean open)
{
// in case we set the feature, remove it
caps_remove_feature(XMPP_FEATURE_USER_AVATAR_METADATA_NOTIFY);
// save nick in list so we look for this one
g_hash_table_insert(looking_for, strdup(nick), NULL);
// add the feature. this will trigger the _avatar_metadata_notfication_handler handler
caps_add_feature(XMPP_FEATURE_USER_AVATAR_METADATA_NOTIFY);
if (open) {
g_hash_table_insert(shall_open, strdup(nick), NULL);
}
return TRUE;
}
static int
_avatar_metadata_handler(xmpp_stanza_t* const stanza, void* const userdata)
{
const char* from = xmpp_stanza_get_attribute(stanza, STANZA_ATTR_FROM);
if (!from) {
return 1;
}
if (!g_hash_table_contains(looking_for, from)) {
return 1;
}
xmpp_stanza_t* root = NULL;
xmpp_stanza_t* event = xmpp_stanza_get_child_by_ns(stanza, STANZA_NS_PUBSUB_EVENT);
if (event) {
root = event;
}
xmpp_stanza_t* pubsub = xmpp_stanza_get_child_by_ns(stanza, STANZA_NS_PUBSUB);
if (pubsub) {
root = pubsub;
}
if (!root) {
return 1;
}
xmpp_stanza_t* items = xmpp_stanza_get_child_by_name(root, "items");
if (!items) {
return 1;
}
xmpp_stanza_t* item = xmpp_stanza_get_child_by_name(items, "item");
if (item) {
xmpp_stanza_t* metadata = xmpp_stanza_get_child_by_name(item, "metadata");
if (metadata) {
xmpp_stanza_t* info = xmpp_stanza_get_child_by_name(metadata, "info");
if (info) {
const char* id = xmpp_stanza_get_id(info);
const char* type = xmpp_stanza_get_attribute(info, "type");
if (id && type) {
log_debug("Avatar ID for %s is: %s", from, id);
avatar_metadata* data = malloc(sizeof(avatar_metadata));
if (data) {
data->type = strdup(type);
data->id = strdup(id);
// request the actual (image) data
_avatar_request_item_by_id(from, data);
}
}
}
}
}
return 1;
}
static void
_avatar_request_item_by_id(const char* jid, avatar_metadata* data)
{
caps_remove_feature(XMPP_FEATURE_USER_AVATAR_METADATA_NOTIFY);
xmpp_ctx_t* const ctx = connection_get_ctx();
char* uid = connection_create_stanza_id();
xmpp_stanza_t* iq = stanza_create_avatar_retrieve_data_request(ctx, uid, data->id, jid);
iq_id_handler_add(uid, _avatar_request_item_result_handler, (ProfIqFreeCallback)_free_avatar_data, data);
free(uid);
iq_send_stanza(iq);
xmpp_stanza_release(iq);
}
static int
_avatar_request_item_result_handler(xmpp_stanza_t* const stanza, void* const userdata)
{
const char* from_attr = xmpp_stanza_get_attribute(stanza, STANZA_ATTR_FROM);
if (!from_attr) {
return 1;
}
if (!g_hash_table_contains(looking_for, from_attr)) {
return 1;
}
g_hash_table_remove(looking_for, from_attr);
xmpp_stanza_t* pubsub = xmpp_stanza_get_child_by_ns(stanza, STANZA_NS_PUBSUB);
if (!pubsub) {
return 1;
}
xmpp_stanza_t* items = xmpp_stanza_get_child_by_name(pubsub, "items");
if (!items) {
return 1;
}
xmpp_stanza_t* item = xmpp_stanza_get_child_by_name(items, "item");
if (!item) {
return 1;
}
xmpp_stanza_t* st_data = xmpp_stanza_get_child_by_name_and_ns(item, "data", STANZA_NS_USER_AVATAR_DATA);
if (!st_data) {
return 1;
}
char* buf = xmpp_stanza_get_text(st_data);
if (!buf) {
return 1;
}
gsize size;
gchar* de = (gchar*)g_base64_decode(buf, &size);
free(buf);
char* path = files_get_data_path("");
GString* filename = g_string_new(path);
free(path);
g_string_append(filename, "avatars/");
errno = 0;
int res = g_mkdir_with_parents(filename->str, S_IRWXU);
if (res == -1) {
const char* errmsg = strerror(errno);
if (errmsg) {
log_error("Avatar: error creating directory: %s, %s", filename->str, errmsg);
} else {
log_error("Avatar: creating directory: %s", filename->str);
}
}
gchar* from = str_replace(from_attr, "@", "_at_");
g_string_append(filename, from);
avatar_metadata* data = (avatar_metadata*)userdata;
// check a few image types ourselves
// if none matches we won't add an extension but linux will
// be able to open it anyways
// TODO: we could use /etc/mime-types
if (g_strcmp0(data->type, "image/png") == 0) {
g_string_append(filename, ".png");
} else if (g_strcmp0(data->type, "image/jpeg") == 0) {
g_string_append(filename, ".jpeg");
} else if (g_strcmp0(data->type, "image/webp") == 0) {
g_string_append(filename, ".webp");
}
free(from);
GError* err = NULL;
if (g_file_set_contents(filename->str, de, size, &err) == FALSE) {
log_error("Unable to save picture: %s", err->message);
cons_show("Unable to save picture %s", err->message);
g_error_free(err);
} else {
cons_show("Avatar saved as %s", filename->str);
}
// if we shall open it
if (g_hash_table_contains(shall_open, from_attr)) {
gchar* argv[] = { prefs_get_string(PREF_AVATAR_CMD), filename->str, NULL };
if (!call_external(argv, NULL, NULL)) {
cons_show_error("Unable to display avatar: check the logs for more information.");
}
g_hash_table_remove(shall_open, from_attr);
}
g_string_free(filename, TRUE);
free(de);
return 1;
}
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