Migrated periodicity update alert into flow alert

scripts/lua/modules/alert_definitions/flow/alert_periodicity_changed.lua

@@ -0,0 +1,70 @@
+--
+-- (C) 2019-21 - ntop.org
+--
+
+-- ##############################################
+
+local flow_alert_keys = require "flow_alert_keys"
+-- Import the classes library.
+local classes = require "classes"
+-- Make sure to import the Superclass!
+local alert = require "alert"
+local json = require "dkjson"
+
+-- ##############################################
+
+local alert_periodicity_changed = classes.class(alert)
+
+-- ##############################################
+
+alert_periodicity_changed.meta = {
+   alert_key = flow_alert_keys.flow_alert_periodicity_changed,
+   i18n_title = "alerts_dashboard.alert_periodicity_update",
+   icon = "fas fa-fw fa-arrows-alt-h",
+}
+
+-- ##############################################
+
+-- @brief Prepare an alert table used to generate the alert
+-- @param last_error A table containing the last lateral movement error, e.g.,
+--                   {"event":"create","shost":"192.168.2.153","dhost":"224.0.0.68","dport":1968,"vlan_id":0,"l4":17,"l7":0,"first_seen":1602488355,"last_seen":1602488355,"num_uses":1}
+-- @return A table with the alert built
+function alert_periodicity_changed:init(last_error, created_or_removed)
+   -- Call the parent constructor
+   self.super:init()
+
+   self.alert_type_params = {
+      error_msg = last_error,
+      created_or_removed = created_or_removed
+   }
+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_periodicity_changed.format(ifid, alert, alert_type_params)
+   -- Extracting info field
+   local info = ""
+   local href = ""
+
+   if alert.json then
+      info = json.decode(alert["json"])
+      if not isEmptyString(info["info"]) then
+         info = "[" .. info["info"] .. "]"
+      else
+         info = ""
+      end   
+   end
+
+   href = '<a href="/lua/pro/enterprise/periodicity_map.lua"><i class="fas fa-lg fa-clock"></i></a>'
+
+   return(i18n("alerts_dashboard.periodicity_changed_descr", { info = info, href = href }))
+end
+
+-- #######################################################
+
+return alert_periodicity_changed