Reworks experimental object-oriented alerts code

scripts/plugins/alerts/security/new_api_demo/alert_definitions/alert_host_new_api_demo.lua

@@ -2,11 +2,25 @@
 -- (C) 2019-20 - ntop.org
 --
 
+-- ##############################################
+
 local alert_keys = require "alert_keys"
+-- Import the classes library.
+local classes = require "classes"
+-- Make sure to import the Superclass!
+local alert = require "alert"
 
 -- ##############################################
 
-local NewHostAlert = { }
+local NewHostAlert = classes.class(alert)
+
+-- ##############################################
+
+NewHostAlert.meta = {
+   alert_key = alert_keys.user.alert_user_04,
+   i18n_title = "New Host API Demo",
+   icon = "fas fa-exclamation",
+}
 
 -- ##############################################
 
@@ -14,8 +28,10 @@ local NewHostAlert = { }
 -- @param one_param The first alert param
 -- @param another_param The second alert param
 -- @return A table with the alert built
-function NewHostAlert:set_params(one_param, another_param)
-   -- tprint("new create: "..self.def_script.alert_key)
+function NewHostAlert:init(one_param, another_param)
+   -- Optional, call to the `alert` constructor
+   self.super:init()
+
    self.alert_type_params = {
       one_param = one_param,
       another_param = another_param
@@ -30,9 +46,4 @@ end
 
 -- #######################################################
 
-return {
-  alert_key = alert_keys.user.alert_user_04,
-  i18n_title = "New Host API Demo",
-  icon = "fas fa-exclamation",
-  Alert = NewHostAlert
-}
+return NewHostAlert