Add alert gateway_unreachable

scripts/lua/modules/alert_definitions/other/alert_gateway_unreachable.lua

@@ -0,0 +1,60 @@
+--
+-- (C) 2019-22 - ntop.org
+--
+
+-- ##############################################
+
+local other_alert_keys = require "other_alert_keys"
+
+local format_utils = require "format_utils"
+
+-- Import the classes library.
+local classes = require "classes"
+-- Make sure to import the Superclass!
+local alert = require "alert"
+local alert_entities = require "alert_entities"
+
+-- ##############################################
+
+local alert_gateway_unreachable = classes.class(alert)
+
+-- ##############################################
+
+alert_gateway_unreachable.meta = {
+  alert_key = other_alert_keys.alert_gateway_unreachable,
+  i18n_title = "alerts_dashboard.gateway_unreachable",
+  icon = "fas fa-fw fa-plug",
+  entities = {
+    alert_entities.system
+  },
+}
+
+-- ##############################################
+
+-- @brief Prepare an alert table used to generate the alert
+-- @param ps_name A string with the name of the periodic activity
+-- @param max_duration_ms The maximum duration taken by this periodic activity to run, in milliseconds
+-- @return A table with the alert built
+function alert_gateway_unreachable:init(name)
+   -- Call the parent constructor
+   self.super:init()
+
+   self.alert_type_params = {
+      name = name,
+   }
+end
+
+-- #######################################################
+
+-- @brief Format an alert into a human-readable string
+-- @param ifid The integer interface id of the generated alert
+-- @param alert The alert description table, including alert data such as the generating entity, timestamp, granularity, type
+-- @param alert_type_params Table `alert_type_params` as built in the `:init` method
+-- @return A human-readable string
+function alert_gateway_unreachable.format(ifid, alert, alert_type_params)
+  return(i18n("alert_messages.gateway_unreachable", {
+    name = alert_type_params.name,
+  }))
+end
+
+return alert_gateway_unreachable