Add `service` script and make timout optional for EventConsumer ctor (#1775)

* Change. Pass pid file first. Because there really no need pass timeout.
Add. `fsc` script to be able shutdown MWI and Call Flow subscribe services.

* Change. rename `fsc` to `service`.

* Change. Use `stop` command instead of `shutdown`

resources/install/scripts/app/voicemail/resources/scripts/mwi_subscribe.lua

@@ -7,9 +7,8 @@ local Database      = require "resources.functions.database"
 local cache         = require "resources.functions.cache"
 local mwi_notify    = require "app.voicemail.resources.functions.mwi_notify"
 
-local sleep    = 60000
+local service_name = "mwi"
 local pid_file = scripts_dir .. "/run/mwi_subscribe.tmp"
-local shutdown_event = "CUSTOM::fusion::mwi::shutdown"
 
 local vm_message_count do
 
@@ -85,7 +84,7 @@ end
 
 end
 
-local events = EventConsumer.new(sleep, pid_file)
+local events = EventConsumer.new(pid_file)
 
 -- FS shutdown
 events:bind("SHUTDOWN", function(self, name, event)
@@ -93,13 +92,16 @@ events:bind("SHUTDOWN", function(self, name, event)
 	return self:stop()
 end)
 
--- shutdown command
-if shutdown_event then
-	events:bind(shutdown_event, function(self, name, event)
-		log.notice("shutdown")
+-- Control commands from FusionPBX
+events:bind("CUSTOM::fusion::service::" .. service_name, function(self, name, event)
+	local command = event:getHeader('service-command')
+	if command == "stop" then
+		log.notice("get stop command")
 		return self:stop()
-	end)
-end
+	end
+
+	log.warningf('Unknown service command: %s', command or '<NONE>')
+end)
 
 -- MWI SUBSCRIBE
 events:bind("MESSAGE_QUERY", function(self, name, event)

resources/install/scripts/call_flow_subscribe.lua

@@ -27,11 +27,10 @@ end
 
 end
 
-local sleep    = 60000
+local service_name = "flow"
 local pid_file = scripts_dir .. "/run/call_flow_subscribe.tmp"
-local shutdown_event = "CUSTOM::fusion::flow::shutdown"
 
-local events = EventConsumer.new(sleep, pid_file)
+local events = EventConsumer.new(pid_file)
 
 -- FS shutdown
 events:bind("SHUTDOWN", function(self, name, event)
@@ -39,13 +38,16 @@ events:bind("SHUTDOWN", function(self, name, event)
 	return self:stop()
 end)
 
--- shutdown command
-if shutdown_event then
-	events:bind(shutdown_event, function(self, name, event)
-		log.notice("shutdown")
+-- Control commands from FusionPBX
+events:bind("CUSTOM::fusion::service::" .. service_name, function(self, name, event)
+	local command = event:getHeader('service-command')
+	if command == "stop" then
+		log.notice("get stop command")
 		return self:stop()
-	end)
-end
+	end
+
+	log.warningf('Unknown service command: %s', command or '<NONE>')
+end)
 
 -- FS receive SUBSCRIBE to BLF from device
 events:bind("PRESENCE_PROBE", function(self, name, event)

resources/install/scripts/resources/functions/event_consumer.lua

@@ -432,10 +432,13 @@ local EventConsumer = class(EventEmitter) do
 local default_timeout       = 60000
 local default_poll_interval = 60000 * 30
 
-function EventConsumer:__init(timeout, pid_file)
+function EventConsumer:__init(pid_file, timeout)
 	self.__base.__init(self)
 
-	if pid_file then timeout = timeout or default_timeout end
+	if pid_file then
+		assert(type(pid_file) == 'string')
+		timeout = timeout or default_timeout
+	end
 
 	if timeout then assert(timeout > 0) end
 
@@ -444,19 +447,14 @@ function EventConsumer:__init(timeout, pid_file)
 	self._consumer = freeswitch.EventConsumer()
 	self._timeout  = timeout
 	self._timers   = TimeEvents.new()
-	self._pid      = api:execute("create_uuid") or tostring(api:getTime())
-	self._pid_file = pid_file
-
 	if pid_file then
-		local pid_path = basename(self._pid_file)
-		mkdir(pid_path)
-		assert(file.write(self._pid_file, self._pid))
+		self._pid      = api:execute("create_uuid") or tostring(api:getTime())
+		self._pid_file = pid_file
 	end
 
 	if self._timeout then
 		self:onInterval(self._timeout, function(self)
 			if not self:_check_pid_file() then return self:stop() end
-			self:emit('TIMEOUT')
 		end)
 	end
 
@@ -479,6 +477,14 @@ function EventConsumer:_check_pid_file()
 	return true
 end
 
+function EventConsumer:_reset_pid_file()
+	if self._pid_file then
+		local pid_path = basename(self._pid_file)
+		mkdir(pid_path)
+		assert(file.write(self._pid_file, self._pid))
+	end
+end
+
 function EventConsumer:bind(event_name, cb)
 	if not self._bound[event_name] then
 		local name, class = split_event(event_name)
@@ -502,6 +508,8 @@ function EventConsumer:bind(event_name, cb)
 end
 
 function EventConsumer:_run()
+	self:_reset_pid_file()
+
 	self._running = true
 
 	-- set some huge default interval

resources/install/scripts/service

@@ -0,0 +1,14 @@
+-- File to conrol FusionPBX Lua services/monitors
+-- @usage: 
+--  # stop `call_flow_subscribe` monitor
+--  fs_cli -x "lua service flow stop"
+--  # stop `mwi_subscribe` monitor
+--  fs_cli -x "lua service mwi stop"
+
+local destination = assert(argv[1], "No service name")
+local command     = assert(argv[2], "No command")
+
+local event = freeswitch.Event("CUSTOM", "fusion::service::"  .. destination);
+event:addHeader('service-command', command)
+
+event:fire()