proxies/control_proxy.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2009, 2010 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of code that interfaces
   9  * the ladishd Control object through D-Bus
  10  **************************************************************************
  11  *
  12  * LADI Session Handler is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * LADI Session Handler is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  24  * or write to the Free Software Foundation, Inc.,
  25  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "control_proxy.h"
  29
  30 static bool g_clean_exit;
  31
  32 static void on_studio_appeared(void * context, DBusMessage * message_ptr)
  33 {
  34   log_info("StudioAppeared");
  35   control_proxy_on_studio_appeared(false);
  36 }
  37
  38 static void on_studio_disappeared(void * context, DBusMessage * message_ptr)
  39 {
  40   log_info("StudioDisappeared");
  41   control_proxy_on_studio_disappeared();
  42 }
  43
  44 static void on_clean_exit(void * context, DBusMessage * message_ptr)
  45 {
  46   g_clean_exit = true;
  47 }
  48
  49 /* this must be static because it is referenced by the
  50  * dbus helper layer when hooks are active */
  51 static struct dbus_signal_hook g_signal_hooks[] =
  52 {
  53   {"StudioAppeared", on_studio_appeared},
  54   {"StudioDisappeared", on_studio_disappeared},
  55   {"CleanExit", on_clean_exit},
  56   {NULL, NULL}
  57 };
  58
  59 static bool control_proxy_is_studio_loaded(bool * present_ptr)
  60 {
  61   dbus_bool_t present;
  62
  63   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "IsStudioLoaded", "", "b", &present))
  64   {
  65     return false;
  66   }
  67
  68   *present_ptr = present;
  69
  70   return true;
  71 }
  72
  73 void on_lifestatus_changed(bool appeared)
  74 {
  75   if (appeared)
  76   {
  77     control_proxy_on_daemon_appeared();
  78   }
  79   else
  80   {
  81     control_proxy_on_daemon_disappeared(g_clean_exit);
  82   }
  83
  84   g_clean_exit = false;
  85 }
  86
  87 bool control_proxy_init(void)
  88 {
  89   bool studio_present;
  90
  91   g_clean_exit = false;
  92
  93   if (!control_proxy_is_studio_loaded(&studio_present))
  94   {
  95     return true;
  96   }
  97
  98   control_proxy_on_daemon_appeared();
  99
 100   if (!dbus_register_service_lifetime_hook(g_dbus_connection, SERVICE_NAME, on_lifestatus_changed))
 101   {
 102     control_proxy_on_daemon_disappeared(true);
 103     return false;
 104   }
 105
 106   if (studio_present)
 107   {
 108     log_info("Initial studio appear");
 109     control_proxy_on_studio_appeared(true);
 110   }
 111
 112   if (!dbus_register_object_signal_hooks(g_dbus_connection, SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, NULL, g_signal_hooks))
 113   {
 114     if (studio_present)
 115     {
 116       control_proxy_on_studio_disappeared();
 117     }
 118
 119     control_proxy_on_daemon_disappeared(true);
 120
 121     return false;
 122   }
 123
 124   return true;
 125 }
 126
 127 void control_proxy_uninit(void)
 128 {
 129   dbus_unregister_object_signal_hooks(g_dbus_connection, SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL);
 130   dbus_unregister_service_lifetime_hook(g_dbus_connection, SERVICE_NAME);
 131 }
 132
 133 void control_proxy_ping(void)
 134 {
 135   bool studio_present;
 136
 137   control_proxy_is_studio_loaded(&studio_present);
 138 }
 139
 140 bool control_proxy_get_studio_list(void (* callback)(void * context, const char * studio_name), void * context)
 141 {
 142   DBusMessage * reply_ptr;
 143   const char * reply_signature;
 144   DBusMessageIter top_iter;
 145   DBusMessageIter struct_iter;
 146   DBusMessageIter array_iter;
 147   const char * studio_name;
 148
 149   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "GetStudioList", "", NULL, &reply_ptr))
 150   {
 151     log_error("GetStudioList() failed.");
 152     return false;
 153   }
 154
 155   reply_signature = dbus_message_get_signature(reply_ptr);
 156   if (strcmp(reply_signature, "a(sa{sv})") != 0)
 157   {
 158     log_error("GetStudioList() reply signature mismatch. '%s'", reply_signature);
 159     dbus_message_unref(reply_ptr);
 160     return false;
 161   }
 162
 163   dbus_message_iter_init(reply_ptr, &top_iter);
 164   for (dbus_message_iter_recurse(&top_iter, &array_iter);
 165        dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_INVALID;
 166        dbus_message_iter_next(&array_iter))
 167   {
 168     dbus_message_iter_recurse(&array_iter, &struct_iter);
 169     dbus_message_iter_get_basic(&struct_iter, &studio_name);
 170     callback(context, studio_name);
 171     dbus_message_iter_next(&struct_iter);
 172     dbus_message_iter_next(&struct_iter);
 173   }
 174
 175   dbus_message_unref(reply_ptr);
 176   return true;
 177 }
 178
 179 bool control_proxy_new_studio(const char * studio_name)
 180 {
 181   if (studio_name == NULL)
 182   {
 183     studio_name = "";
 184   }
 185
 186   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "NewStudio", "s", &studio_name, ""))
 187   {
 188     log_error("NewStudio() failed.");
 189     return false;
 190   }
 191
 192   return true;
 193 }
 194
 195 bool control_proxy_load_studio(const char * studio_name)
 196 {
 197   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "LoadStudio", "s", &studio_name, ""))
 198   {
 199     log_error("LoadStudio() failed.");
 200     return false;
 201   }
 202
 203   return true;
 204 }
 205
 206 bool control_proxy_delete_studio(const char * studio_name)
 207 {
 208   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "DeleteStudio", "s", &studio_name, ""))
 209   {
 210     log_error("DeleteStudio() failed.");
 211     return false;
 212   }
 213
 214   return true;
 215 }
 216
 217 bool control_proxy_exit(void)
 218 {
 219   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "Exit", "", ""))
 220   {
 221     log_error("Exit() failed.");
 222     return false;
 223   }
 224
 225   return true;
 226 }
 227
 228 bool control_proxy_get_room_template_list(void (* callback)(void * context, const char * template_name), void * context)
 229 {
 230   DBusMessage * reply_ptr;
 231   const char * reply_signature;
 232   DBusMessageIter top_iter;
 233   DBusMessageIter struct_iter;
 234   DBusMessageIter array_iter;
 235   const char * name;
 236
 237   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "GetRoomTemplateList", "", NULL, &reply_ptr))
 238   {
 239     log_error("GetRoomTemplateList() failed.");
 240     return false;
 241   }
 242
 243   reply_signature = dbus_message_get_signature(reply_ptr);
 244   if (strcmp(reply_signature, "a(sa{sv})") != 0)
 245   {
 246     log_error("GetRoomTemplateList() reply signature mismatch. '%s'", reply_signature);
 247     dbus_message_unref(reply_ptr);
 248     return false;
 249   }
 250
 251   dbus_message_iter_init(reply_ptr, &top_iter);
 252   for (dbus_message_iter_recurse(&top_iter, &array_iter);
 253        dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_INVALID;
 254        dbus_message_iter_next(&array_iter))
 255   {
 256     dbus_message_iter_recurse(&array_iter, &struct_iter);
 257     dbus_message_iter_get_basic(&struct_iter, &name);
 258     callback(context, name);
 259     dbus_message_iter_next(&struct_iter);
 260     dbus_message_iter_next(&struct_iter);
 261   }
 262
 263   dbus_message_unref(reply_ptr);
 264   return true;
 265 }