/*

 * action-handlers.c

 *

 * Copyrigth (C) 2010 Nicolas Cornu <nicolas.cornu@ensi-bourges.fr>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or (at

 * your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307

 * USA

 */

#include <glib.h>

#include <mcabber/logprint.h>

#include <mcabber/xmpp_helper.h>

#include <mcabber/events.h>

#include <mcabber/hbuf.h>

#include <mcabber/utils.h>

#include <jingle/jingle.h>

#include <jingle/check.h>

#include <jingle/sessions.h>

#include <jingle/register.h>

#include <jingle/send.h>

#include <jingle/action-handlers.h>

void handle_content_accept(JingleNode *jn)

{

  GError *err = NULL;

  GSList *child = NULL;

  JingleContent *cn;

  JingleAppFuncs *appfuncs; 

  JingleTransportFuncs *transfuncs;

  gconstpointer description, transport;

  const gchar *xmlns;

  JingleSession *sess;

  if (!check_contents(jn, &err)) {

    scr_log_print(LPRINT_DEBUG, "jingle: One of the content element was invalid (%s)",

                  err->message);

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  /* it's better if there is at least one content elem */

  if (g_slist_length(jn->content) < 1) {

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  // if a session with the same sid doesn't already exists

  if ((sess = session_find(jn)) == NULL) {

    jingle_send_iq_error(jn->message, "cancel", "item-not-found", "unknown-session");

    return;

  }

  jingle_ack_iq(jn->message);

  for (child = jn->content; child; child = child->next) {

    cn = (JingleContent *)(child->data);

  }

}

void handle_content_add(JingleNode *jn)

{

  GError *err = NULL;

  GSList *child = NULL;

  JingleContent *cn;

  JingleAppFuncs *appfuncs; 

  JingleTransportFuncs *transfuncs;

  gconstpointer description, transport;

  const gchar *xmlns;

  JingleSession *sess;

  JingleNode accept, reject;

  JingleContent tmp_cn;

  LmMessage *r;

  if (!check_contents(jn, &err)) {

    scr_log_print(LPRINT_DEBUG, "jingle: One of the content element was invalid (%s)",

                  err->message);

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  /* it's better if there is at least one content elem */

  if (g_slist_length(jn->content) < 1) {

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  // if a session with the same sid doesn't already exists

  if ((sess = session_find(jn)) == NULL) {

    jingle_send_iq_error(jn->message, "cancel", "item-not-found", "unknown-session");

    return;

  }

  jingle_ack_iq(jn->message);

  accept.action = JINGLE_CONTENT_ACCEPT;

  accept.sid = jn->sid;

  accept.content = NULL;

  reject.action = JINGLE_CONTENT_REJECT;

  reject.sid = jn->sid;

  reject.content = NULL;

  for (child = jn->content; child; child = child->next) {

    cn = (JingleContent *)(child->data);

    xmlns = lm_message_node_get_attribute(cn->description, "xmlns");

    appfuncs = jingle_get_appfuncs(xmlns);

    if (appfuncs == NULL) continue;

    xmlns = lm_message_node_get_attribute(cn->transport, "xmlns");

    transfuncs = jingle_get_transportfuncs(xmlns);

    if (appfuncs == NULL) continue;

    description = appfuncs->check(cn, &err);

    if (description == NULL || err != NULL) {

      reject.content = g_slist_append(reject.content, cn);

      continue;

    }

    transport = transfuncs->check(cn, &err);

    if (transport == NULL || err != NULL) {

      reject.content = g_slist_append(reject.content, cn);

      continue;

    }

    accept.content = g_slist_append(accept.content, cn);

  }

  if (g_slist_length(accept.content) != 0) {

    r = lm_message_from_jinglenode(&accept, lm_message_get_from(jn->message));

    if (r) {

      lm_message_unref(r);

    }

  }

  if (g_slist_length(reject.content) != 0) {

    r = lm_message_from_jinglenode(&reject, lm_message_get_from(jn->message));

    if (r) {

      lm_connection_send(lconnection, r, NULL);

      lm_message_unref(r);

    }

  }

}

void handle_content_reject(JingleNode *jn)

{

  GError *err = NULL;

  GSList *child = NULL;

  JingleContent *cn;

  JingleAppFuncs *appfuncs; 

  JingleTransportFuncs *transfuncs;

  gconstpointer description, transport;

  const gchar *xmlns;

  JingleSession *sess;

  if (!check_contents(jn, &err)) {

    scr_log_print(LPRINT_DEBUG, "jingle: One of the content element was invalid (%s)",

                  err->message);

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  /* it's better if there is at least one content elem */

  if (g_slist_length(jn->content) < 1) {

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  // if a session with the same sid doesn't already exists

  if ((sess = session_find(jn)) == NULL) {

    jingle_send_iq_error(jn->message, "cancel", "item-not-found", "unknown-session");

    return;

  }

  jingle_ack_iq(jn->message);

  for (child = jn->content; child; child = child->next) {

    cn = (JingleContent *)(child->data);

    session_remove_sessioncontent(sess, cn->name);

  }

  // If there is nothing more to do, close the session

  if (g_slist_length(sess->content) == 0) {

    jingle_send_session_terminate(jn, "success");

    session_delete(sess);

    return;

  }

}

void handle_content_remove(JingleNode *jn)

{

  GError *err = NULL;

  GSList *child = NULL;

  JingleContent *cn;

  JingleAppFuncs *appfuncs; 

  JingleTransportFuncs *transfuncs;

  gconstpointer description, transport;

  const gchar *xmlns;

  JingleSession *sess;

  if (!check_contents(jn, &err)) {

    scr_log_print(LPRINT_DEBUG, "jingle: One of the content element was invalid (%s)",

                  err->message);

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  /* it's better if there is at least one content elem */

  if (g_slist_length(jn->content) < 1) {

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  // if a session with the same sid doesn't already exists

  if ((sess = session_find(jn)) == NULL) {

    jingle_send_iq_error(jn->message, "cancel", "item-not-found", "unknown-session");

    return;

  }

  jingle_ack_iq(jn->message);

  for (child = jn->content; child; child = child->next) {

    cn = (JingleContent *)(child->data);

    session_remove_sessioncontent(sess, cn->name);

  }

}

void handle_session_initiate(JingleNode *jn)

{

  GError *err = NULL;

  gboolean valid_disposition = FALSE;

  JingleContent *cn;

  GString *sbuf;

  GSList *child = NULL;

  LmMessage *r;

  // Make sure the from are an user in our roster

  if (!roster_find(jidtodisp(lm_message_get_from(jn->message)), jidsearch, 0)) {

    jingle_send_session_terminate(jn, "decline");

    jingle_free_jinglenode(jn);

    return;

  }

  if (!check_contents(jn, &err)) {

    scr_log_print(LPRINT_DEBUG, "jingle: One of the content element was invalid (%s)",

                  err->message);

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  // a session-initiate message must contains at least one <content> element

  if (g_slist_length(jn->content) < 1) {

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;

  }

  /* When sending a session-initiate at least one <content/> element MUST have

   * a disposition of "session"); if this rule is violated, the responder MUST

   * return a <bad-request/> error to the initiator.

   */

  for (child = jn->content; child && !valid_disposition; child = child->next) {

    cn = (JingleContent*)(child->data);

    if (g_strcmp0(cn->disposition, "session") == 0 || cn->disposition == NULL)

      valid_disposition = TRUE;

  }

  if (!valid_disposition) {

    jingle_send_iq_error(jn->message, "cancel", "bad-request", NULL);

    return;  

  }

  // if a session with the same sid already exists

  if (session_find(jn) != NULL) {

    jingle_send_iq_error(jn->message, "cancel", "unexpected-request", "out-of-order");

    return;

  }

  jingle_ack_iq(jn->message);

  // Wait that user accept the jingle

  sbuf = g_string_new("");

  g_string_printf(sbuf, "Received an invitation for a jingle session from <%s>", lm_message_get_from(jn->message));

  scr_WriteIncomingMessage(jidtodisp(lm_message_get_from(jn->message)), sbuf->str, 0, HBB_PREFIX_INFO, 0);

  scr_LogPrint(LPRINT_LOGNORM, "%s", sbuf->str);

  {

    const char *id;

    char *desc = g_strdup_printf("<%s> invites you to do a jingle session", lm_message_get_from(jn->message));

    id = evs_new(desc, NULL, 0, evscallback_jingle, jn, NULL);

    g_free(desc);

    if (id)

      g_string_printf(sbuf, "Please use /event %s accept|reject", id);

    else

      g_string_printf(sbuf, "Unable to create a new event!");

  }

}

void handle_session_terminate(JingleNode *jn)

{

  JingleSession *sess;

  if ((sess = session_find(jn)) == NULL) {

    jingle_send_iq_error(jn->message, "cancel", "item-not-found", "unknown-session");

    return;

  }

  session_delete(sess);

  jingle_ack_iq(jn->message);

}