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/**
@file rexmpp_roster.c
@brief Roster-related functions.
@author defanor <defanor@uberspace.net>
@date 2020
@copyright MIT license.
*/
#include "rexmpp.h"
#include "rexmpp_xml.h"
#include <syslog.h>
#include <string.h>
#include <stdlib.h>
rexmpp_xml_t *
rexmpp_roster_find_item (rexmpp_t *s,
const char *jid,
rexmpp_xml_t **prev_item)
{
rexmpp_xml_t *prev = NULL, *cur = s->roster_items;
while (cur != NULL) {
const char *cur_jid = rexmpp_xml_find_attr_val(cur, "jid");
if (cur_jid == NULL) {
rexmpp_log(s, LOG_ALERT, "No jid found in a roster item.");
return NULL;
}
int match = (strcmp(cur_jid, jid) == 0);
if (match) {
if (prev_item != NULL) {
*prev_item = prev;
}
return cur;
}
prev = cur;
cur = rexmpp_xml_next_elem_sibling(cur);
}
return NULL;
}
rexmpp_err_t rexmpp_modify_roster (rexmpp_t *s, rexmpp_xml_t *item) {
rexmpp_err_t ret = REXMPP_SUCCESS;
if (! rexmpp_xml_match(item, "jabber:iq:roster", "item")) {
rexmpp_log(s, LOG_ERR, "No roster item.");
return REXMPP_E_PARAM;
}
const char *subscription = rexmpp_xml_find_attr_val(item, "subscription");
const char *jid = rexmpp_xml_find_attr_val(item, "jid");
if (subscription != NULL && strcmp(subscription, "remove") == 0) {
/* Delete the item. */
rexmpp_xml_t *prev, *cur;
cur = rexmpp_roster_find_item(s, jid, &prev);
if (cur != NULL) {
if (prev != NULL) {
prev->next = rexmpp_xml_next_elem_sibling(cur);
} else {
s->roster_items = rexmpp_xml_next_elem_sibling(cur);
}
rexmpp_xml_free(cur);
} else {
ret = REXMPP_E_ROSTER_ITEM_NOT_FOUND;
}
} else {
/* Add or modify the item. */
rexmpp_xml_t *cur, *prev;
cur = rexmpp_roster_find_item(s, jid, &prev);
/* Remove the item if it was in the roster before. */
if (cur != NULL) {
if (prev != NULL) {
prev->next = rexmpp_xml_next_elem_sibling(cur);
} else {
s->roster_items = rexmpp_xml_next_elem_sibling(cur);
}
rexmpp_xml_free(cur);
}
/* Add the new item. */
rexmpp_xml_t *new_item = rexmpp_xml_clone(item);
new_item->next = s->roster_items;
s->roster_items = new_item;
}
if (s->roster_modify_cb != NULL) {
s->roster_modify_cb(s, item);
}
return ret;
}
void rexmpp_roster_set (rexmpp_t *s, rexmpp_xml_t *query) {
if (s->roster_items != NULL) {
rexmpp_xml_free_list(s->roster_items);
}
if (s->roster_ver != NULL) {
free(s->roster_ver);
}
const char *roster_ver = rexmpp_xml_find_attr_val(query, "ver");
s->roster_ver = NULL;
if (roster_ver != NULL) {
s->roster_ver = strdup(roster_ver);
}
s->roster_items = rexmpp_xml_clone_list(rexmpp_xml_first_elem_child(query));
if (s->roster_modify_cb != NULL) {
rexmpp_xml_t *item;
for (item = rexmpp_xml_first_elem_child(query);
item != NULL;
item = rexmpp_xml_next_elem_sibling(item))
{
s->roster_modify_cb(s, item);
}
}
}
void rexmpp_roster_cache_read (rexmpp_t *s) {
if (s->roster_cache_file == NULL) {
rexmpp_log(s, LOG_WARNING, "No roster cache file path is set.");
return;
}
rexmpp_xml_t *query = rexmpp_xml_read_file(s->roster_cache_file);
if (query != NULL) {
rexmpp_roster_set(s, query);
rexmpp_xml_free(query);
}
}
void rexmpp_roster_cache_write (rexmpp_t *s) {
if (s->roster_cache_file == NULL) {
rexmpp_log(s, LOG_WARNING, "No roster cache file path is set.");
return;
}
rexmpp_xml_t *query = rexmpp_xml_new_elem("query", "jabber:iq:roster");
if (s->roster_ver != NULL) {
rexmpp_xml_add_attr(query, "ver", s->roster_ver);
}
if (s->roster_items != NULL) {
rexmpp_xml_add_child(query, rexmpp_xml_clone_list(s->roster_items));
}
rexmpp_xml_write_file(s->roster_cache_file, query);
rexmpp_xml_free(query);
}
void rexmpp_iq_roster_get (rexmpp_t *s,
void *ptr,
rexmpp_xml_t *req,
rexmpp_xml_t *response,
int success)
{
(void)ptr;
(void)req; /* Nothing interesting in the request. */
if (! success) {
rexmpp_log(s, LOG_ERR, "Roster loading failed.");
return;
}
rexmpp_xml_t *query =
rexmpp_xml_find_child(response, "jabber:iq:roster", "query");
if (query == NULL) {
rexmpp_log(s, LOG_DEBUG, "No roster query in reply.");
return;
}
rexmpp_roster_set(s, query);
if (s->roster_cache_file != NULL) {
rexmpp_roster_cache_write(s);
}
}
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