Disable muc history when joining an muc since we now have muc mam

Disable muc history when MAM is enabled

see #660

Author: MarcoPolo-PasTonMolo

src/xmpp/stanza.c

@@ -34,6 +34,7 @@
  */
 
 #include "config.h"
+#include "config/preferences.h"
 
 #ifdef HAVE_GIT_VERSION
 #include "gitversion.h"
@@ -563,6 +564,15 @@ stanza_create_room_join_presence(xmpp_ctx_t* const ctx,
         xmpp_stanza_release(pass);
     }
 
+    // Disable muc history
+    if (prefs_get_boolean(PREF_MAM)) {
+        xmpp_stanza_t* history = xmpp_stanza_new(ctx);
+        xmpp_stanza_set_name(history, STANZA_NAME_HISTORY);
+        xmpp_stanza_set_attribute(history, "maxchars", "0");
+        xmpp_stanza_add_child(x, history);
+        xmpp_stanza_release(history);
+    }
+
     xmpp_stanza_add_child(presence, x);
     xmpp_stanza_release(x);
 

src/xmpp/stanza.h

@@ -56,6 +56,7 @@
 #define STANZA_NAME_PRESENCE  "presence"
 #define STANZA_NAME_PRIORITY  "priority"
 #define STANZA_NAME_X         "x"
+#define STANZA_NAME_HISTORY   "history"
 // XEP-0373: OpenPGP for XMPP
 #define STANZA_NAME_OPENPGP          "openpgp"
 #define STANZA_NAME_PUPKEY           "pubkey"