Add global link preview method tgl.set_link_preview(bool)

python-tg.c

@@ -803,10 +803,12 @@ void py_do_all (void) {
     case pq_msg:
       if(PyArg_ParseTuple(args, "O!s#|OO", &tgl_PeerType, &peer, &str, &len, &cb_extra, &pyObj1)) {
         if(PyArg_ParseTuple(pyObj1, "ii", &preview, &reply_id)) {
+          if(preview != -1) {
             if(preview)
               flags |= TGL_SEND_MSG_FLAG_ENABLE_PREVIEW;
             else
               flags |= TGL_SEND_MSG_FLAG_DISABLE_PREVIEW;
+          }
           flags |= TGL_SEND_MSG_FLAG_REPLY (reply_id);
         }
         tgl_do_send_message (TLS, PY_PEER_ID(peer), str, len, flags, py_msg_cb, cb_extra);
@@ -1148,6 +1150,20 @@ PyObject* py_safe_quit(PyObject *self, PyObject *args)
   Py_RETURN_NONE;
 }
 
+PyObject* py_set_preview(PyObject *self, PyObject *args)
+{
+  int preview = 0;
+  if(PyArg_ParseTuple(args, "p", &preview)) {
+    if(preview)
+      TLS->disable_link_preview = 0;
+    else
+      TLS->disable_link_preview = 1;
+  } else {
+    PyErr_Print();
+  }
+
+  Py_RETURN_NONE;
+}
 
 // Store callables for python functions
 TGL_PYTHON_CALLBACK("on_binlog_replay_end", _py_binlog_end);
@@ -1212,6 +1228,7 @@ static PyMethodDef py_tgl_methods[] = {
   {"set_on_user_update", set_py_user_update, METH_VARARGS, ""},
   {"set_on_chat_update", set_py_chat_update, METH_VARARGS, ""},
   {"set_on_loop", set_py_on_loop, METH_VARARGS, ""},
+  {"set_link_preview", py_set_preview, METH_VARARGS, ""},
   {"safe_quit", py_safe_quit, METH_VARARGS, ""},
   {"safe_exit", py_safe_quit, METH_VARARGS, ""}, // Alias to safe_quit for naming consistancy in python.
   { NULL, NULL, 0, NULL }

python-types.c

@@ -378,7 +378,7 @@ tgl_Peer_send_msg (tgl_Peer *self, PyObject *args, PyObject *kwargs)
   static char *kwlist[] = {"message", "callback", "preview", "reply", NULL};
 
   char *message;
-  int preview = 1;
+  int preview = -1;
   int reply = 0;
   PyObject *callback = NULL;