2013-05-24 20:44:07 +00:00
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* Matt Jordan <mjordan@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief The Asterisk Management Interface - AMI (MWI event handling)
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*
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* \author Matt Jordan <mjordan@digium.com>
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/manager.h"
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#include "asterisk/app.h"
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#include "asterisk/channel.h"
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#include "asterisk/stasis_message_router.h"
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#include "asterisk/stasis.h"
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struct stasis_message_router *mwi_state_router;
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/*** DOCUMENTATION
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***/
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/*! \brief The \ref stasis subscription returned by the forwarding of the MWI topic
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* to the manager topic
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*/
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static struct stasis_subscription *topic_forwarder;
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/*! \brief Callback function used by \ref mwi_app_event_cb to weed out "Event" keys */
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static int exclude_event_cb(const char *key)
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{
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if (!strcmp(key, "Event")) {
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return -1;
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}
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return 0;
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}
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/*! \brief Generic MWI event callback used for one-off events from voicemail modules */
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static void mwi_app_event_cb(void *data, struct stasis_subscription *sub,
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struct stasis_topic *topic,
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struct stasis_message *message)
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{
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struct ast_mwi_blob *payload = stasis_message_data(message);
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RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free);
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RAII_VAR(struct ast_str *, event_buffer, NULL, ast_free);
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struct ast_json *event_json = ast_json_object_get(payload->blob, "Event");
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if (!event_json) {
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return;
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}
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if (payload->mwi_state && payload->mwi_state->snapshot) {
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channel_event_string = ast_manager_build_channel_state_string(payload->mwi_state->snapshot);
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}
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event_buffer = ast_manager_str_from_json_object(payload->blob, exclude_event_cb);
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if (!event_buffer) {
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ast_log(AST_LOG_WARNING, "Failed to create payload for event %s\n", ast_json_string_get(event_json));
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return;
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}
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manager_event(EVENT_FLAG_CALL, ast_json_string_get(event_json),
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"Mailbox: %s\r\n"
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"%s"
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"%s",
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payload->mwi_state ? payload->mwi_state->uniqueid : "Unknown",
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ast_str_buffer(event_buffer),
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channel_event_string ? ast_str_buffer(channel_event_string) : "");
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}
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static void mwi_update_cb(void *data, struct stasis_subscription *sub,
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struct stasis_topic *topic,
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struct stasis_message *message)
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{
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struct ast_mwi_state *mwi_state;
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RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free);
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if (ast_mwi_state_type() != stasis_message_type(message)) {
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return;
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}
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mwi_state = stasis_message_data(message);
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if (!mwi_state) {
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return;
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}
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if (mwi_state->snapshot) {
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channel_event_string = ast_manager_build_channel_state_string(mwi_state->snapshot);
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}
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/*** DOCUMENTATION
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<managerEventInstance>
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<synopsis>Raised when the state of messages in a voicemail mailbox
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has changed or when a channel has finished interacting with a
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mailbox.</synopsis>
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<syntax>
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2013-08-01 17:07:52 +00:00
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<channel_snapshot/>
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2013-05-24 20:44:07 +00:00
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<parameter name="Mailbox">
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<para>The mailbox with the new message, specified as <literal>mailbox</literal>@<literal>context</literal></para>
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</parameter>
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<parameter name="Waiting">
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<para>Whether or not the mailbox has messages waiting for it.</para>
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</parameter>
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<parameter name="New">
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<para>The number of new messages.</para>
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</parameter>
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<parameter name="Old">
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<para>The number of old messages.</para>
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</parameter>
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</syntax>
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<description>
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<note><para>The Channel related parameters are only present if a
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channel was involved in the manipulation of a mailbox. If no
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channel is involved, the parameters are not included with the
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event.</para>
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</note>
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</description>
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</managerEventInstance>
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***/
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manager_event(EVENT_FLAG_CALL, "MessageWaiting",
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"%s"
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"Mailbox: %s\r\n"
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"Waiting: %d\r\n"
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"New: %d\r\n"
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"Old: %d\r\n",
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AS_OR(channel_event_string, ""),
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mwi_state->uniqueid,
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ast_app_has_voicemail(mwi_state->uniqueid, NULL),
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mwi_state->new_msgs,
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mwi_state->old_msgs);
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}
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static void manager_mwi_shutdown(void)
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{
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stasis_unsubscribe(topic_forwarder);
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topic_forwarder = NULL;
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}
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int manager_mwi_init(void)
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{
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int ret = 0;
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struct stasis_topic *manager_topic;
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struct stasis_topic *mwi_topic;
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struct stasis_message_router *message_router;
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manager_topic = ast_manager_get_topic();
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if (!manager_topic) {
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return -1;
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}
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message_router = ast_manager_get_message_router();
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if (!message_router) {
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return -1;
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}
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mwi_topic = ast_mwi_topic_all();
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if (!mwi_topic) {
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return -1;
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}
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topic_forwarder = stasis_forward_all(mwi_topic, manager_topic);
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if (!topic_forwarder) {
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return -1;
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}
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ast_register_atexit(manager_mwi_shutdown);
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ret |= stasis_message_router_add(message_router,
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ast_mwi_state_type(),
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mwi_update_cb,
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NULL);
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ret |= stasis_message_router_add(message_router,
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ast_mwi_vm_app_type(),
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mwi_app_event_cb,
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NULL);
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/* If somehow we failed to add any routes, just shut down the whole
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* thing and fail it.
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*/
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if (ret) {
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manager_mwi_shutdown();
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return -1;
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}
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return 0;
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}
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