Revert "Migrates alerts to an object-oriented implementation"

This reverts commit fbc283f12f.

scripts/lua/modules/alert_definitions/alert_flow_risk.lua

@@ -2,64 +2,29 @@
 -- (C) 2019-20 - ntop.org
 --
 
--- ##############################################
-
-local alert_keys = require "alert_keys"
-local status_keys = require "flow_keys"
-package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
-
-local flow_risk_utils = require "flow_risk_utils"
--- Import the classes library.
-local classes = require "classes"
--- Make sure to import the Superclass!
-local alert = require "alert"
-
--- ##############################################
-
-local alert_flow_risk = classes.class(alert)
-
--- ##############################################
-
-alert_flow_risk.meta = {
-   status_key = status_keys.ntopng.status_flow_risk,
-   alert_key = alert_keys.ntopng.alert_flow_risk,
-   i18n_title = "alerts_dashboard.flow_risk",
-   icon = "fas fa-exclamation",
-}
-
--- ##############################################
+-- #######################################################
 
 -- @brief Prepare an alert table used to generate the alert
+-- @param alert_severity A severity as defined in `alert_severities`
 -- @param risk_id Integer nDPI flow risk identifier
 -- @return A table with the alert built
-function alert_flow_risk:init(risk_id)
-   -- Call the parent constructor
-   self.super:init()
-
-   self.alert_type_params = {
-      risk_id = risk_id
+local function createFlowRisk(risk_id)
+   local built = {
+      alert_type_params = {
+	 risk_id = risk_id
+      },
    }
+
+   return built
 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_flow_risk.format(ifid, alert, alert_type_params)
-   -- No need to do special formatting of flow risk here, risks are already formatted
-   -- inside the flow details page
-   local res = i18n("alerts_dashboard.flow_risk")
+local alert_keys = require "alert_keys"
 
-   if((alert_type_params ~= nil) and alert_type_params.risk_id) then
-      res = flow_risk_utils.risk_id_2_i18n(alert_type_params.risk_id)
-   end
-
-   return res
-end
-
--- #######################################################
-
-return alert_flow_risk
+return {
+  alert_key = alert_keys.ntopng.alert_flow_risk,
+  i18n_title = "alerts_dashboard.flow_risk",
+  icon = "fas fa-exclamation",
+  creator = createFlowRisk,
+}