[Asterisk-code-review] res mwi devstate.c: New module to allow presense subs to VM ... (asterisk[13])

[George Joseph]

George Joseph has uploaded this change for review. ( https://gerrit.asterisk.org/11023


Change subject: res_mwi_devstate.c: New module to allow presense subs to VM boxes
......................................................................

res_mwi_devstate.c: New module to allow presense subs to VM boxes

This module allows presense subscriptions to voicemail boxes.  This
allows common BLF keys to act as voicemail waiting indicators.

ASTERISK-28301

Change-Id: I62a246c24f3d7d432e33e22d7a4a57c15c292fdd
---
A res/res_mwi_devstate.c
1 file changed, 87 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/23/11023/1

diff --git a/res/res_mwi_devstate.c b/res/res_mwi_devstate.c
new file mode 100644
index 0000000..3154210
--- /dev/null
+++ b/res/res_mwi_devstate.c
@@ -0,0 +1,87 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2014, Schmooze Com, Inc.
+ *
+ * Jason Parker <jason.parker at schmoozecom.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*** MODULEINFO
+	<support_level>core</support_level>
+ ***/
+
+#include "asterisk.h"
+
+#include "asterisk/app.h"
+#include "asterisk/devicestate.h"
+#include "asterisk/module.h"
+#include "asterisk/stasis_message_router.h"
+#include "asterisk/stasis.h"
+
+static struct stasis_subscription *mwi_sub;
+
+static void mwi_update_cb(void *data, struct stasis_subscription *sub,
+				    struct stasis_message *msg)
+{
+	struct ast_mwi_state *mwi_state;
+
+	if (!stasis_subscription_is_subscribed(sub) || ast_mwi_state_type() != stasis_message_type(msg)) {
+		return;
+	}
+
+	mwi_state = stasis_message_data(msg);
+	if (!mwi_state) {
+		return;
+	}
+
+	if (mwi_state->new_msgs > 0) {
+		ast_debug(1, "Sending inuse devstate change for MWI:%s\n", mwi_state->uniqueid);
+		ast_devstate_changed(AST_DEVICE_INUSE, AST_DEVSTATE_CACHABLE, "MWI:%s", mwi_state->uniqueid);
+	} else {
+		ast_debug(1, "Sending not inuse devstate change for MWI:%s\n", mwi_state->uniqueid);
+		ast_devstate_changed(AST_DEVICE_NOT_INUSE, AST_DEVSTATE_CACHABLE, "MWI:%s", mwi_state->uniqueid);
+	}
+}
+
+static int mwi_cached_cb(void *obj, void *arg, int flags)
+{
+	struct stasis_message *msg = obj;
+	mwi_update_cb(NULL, mwi_sub, msg);
+
+	return 0;
+}
+
+static int unload_module(void) {
+	mwi_sub = stasis_unsubscribe(mwi_sub);
+
+	return AST_MODULE_LOAD_SUCCESS;
+}
+
+static int load_module(void) {
+	RAII_VAR(struct ao2_container *, cached, NULL, ao2_cleanup);
+
+	if (!(mwi_sub = stasis_subscribe(ast_mwi_topic_all(), mwi_update_cb, NULL))) {
+		return AST_MODULE_LOAD_DECLINE;
+	}
+
+	cached = stasis_cache_dump(ast_mwi_state_cache(), NULL);
+	ao2_callback(cached, OBJ_NODATA, mwi_cached_cb, NULL);
+
+	return AST_MODULE_LOAD_SUCCESS;
+}
+
+AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "MWI Device State Subscriptions",
+		.load = load_module,
+		.unload = unload_module,
+		.load_pri = AST_MODPRI_DEVSTATE_PROVIDER,
+	       );

-- 
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Gerrit-Project: asterisk
Gerrit-Branch: 13
Gerrit-MessageType: newchange
Gerrit-Change-Id: I62a246c24f3d7d432e33e22d7a4a57c15c292fdd
Gerrit-Change-Number: 11023
Gerrit-PatchSet: 1
Gerrit-Owner: George Joseph <gjoseph at digium.com>
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