Handle chat history from groupchat

src/jabber.c

@@ -401,8 +401,25 @@ _message_handler(xmpp_conn_t * const conn,
     from = xmpp_stanza_get_attribute(stanza, "from");
 
     if (room_jid_is_room_chat(from)) {
-
+        xmpp_stanza_t *delay = xmpp_stanza_get_child_by_name(stanza, "delay");
-
+        if (delay != NULL) {
+            char *utc_stamp = xmpp_stanza_get_attribute(delay, "stamp");
+            GTimeVal tv_stamp;
+            if(g_time_val_from_iso8601(utc_stamp, &tv_stamp)) {
+                xmpp_stanza_t *body = xmpp_stanza_get_child_by_name(stanza, "body");
+                if (body != NULL) {
+                    char *message = xmpp_stanza_get_text(body);
+                    char **tokens = g_strsplit(from, "/", 0);
+                    char *room_jid = tokens[0];
+                    char *nick = tokens[1];
+                    win_show_room_history(room_jid, nick, tv_stamp, message);
+                }
+            } else {
+                log_error("Couldn't parse datetime string receiving room history: %s", utc_stamp);
+            }
+        } else {
+            // handle normal groupchat messages
+        }
 
         cons_show("CHAT ROOM MESSAGE RECIEVED");
     } else {

src/ui.h

@@ -107,6 +107,8 @@ void win_join_chat(const char * const room_jid, const char * const nick);
 void win_show_chat_room_member(const char * const room_jid,
     const char * const nick);
 int win_in_groupchat(void);
+void win_show_room_history(const char * const room_jid, const char * const nick,
+    GTimeVal tv_stamp, const char * const message);
 
 // console window actions
 void cons_about(void);

src/windows.c

@@ -508,6 +508,26 @@ win_show_chat_room_member(const char * const room_jid, const char * const nick)
         dirty = TRUE;
 }
 
+void
+win_show_room_history(const char * const room_jid, const char * const nick,
+    GTimeVal tv_stamp, const char * const message)
+{
+    int win_index = _find_prof_win_index(room_jid);
+    WINDOW *win = _wins[win_index].win;
+
+    GDateTime *time = g_date_time_new_from_timeval_utc(&tv_stamp);
+    gchar *date_fmt = g_date_time_format(time, "%H:%M:%S");
+    wprintw(win, "%s - ", date_fmt);
+    g_date_time_unref(time);
+    g_free(date_fmt);
+
+    wprintw(win, "%s: ", nick);
+    _win_show_message(win, message);
+
+    if (win_index == _curr_prof_win)
+        dirty = TRUE;
+}
+
 void
 win_show(const char * const msg)
 {