[VA] Add charts page (#7783)

scripts/lua/modules/vulnerability_scan/vs_utils.lua

@@ -39,6 +39,7 @@ package.path = dirs.installdir .. "/scripts/lua/modules/vulnerability_scan/?.lua
 require "lua_utils" -- used by tprint (debug)
 
 local host_to_scan_key          = "ntopng.prefs.host_to_scan"
+local host_scannned_count_key    = "ntopng.prefs.host_to_scan.count_scanned"
 local host_scan_queue_key       = "ntopng.vs_scan_queue"
 local scanned_hosts_changes_key = "ntopng.alerts.scanned_hosts_changes"
 
@@ -404,10 +405,45 @@ function vs_utils.save_host_to_scan(scan_type, host, scan_result, last_scan_time
       result = 2 --aleready_present
    end
 
+   local counts = vs_utils.update_ts_counters()
+
+   
+
    --ntop.setCache(host_to_scan_key, json.encode(saved_hosts))
    return result
 end
 
+function vs_utils.update_ts_counters() 
+   local hosts_details = vs_utils.retrieve_hosts_to_scan()
+
+   local count_cve         = 0
+   local hosts_scanned
+   local open_ports_count  = 0
+   local hosts_count       = 0
+
+   for _,item in ipairs(hosts_details) do 
+      
+      hosts_count = hosts_count + 1
+      open_ports_count = open_ports_count + item.num_open_ports
+      count_cve = count_cve + item.num_vulnerabilities_found
+
+   end
+
+   local count = ntop.getCache(host_scannned_count_key)
+   if (not isEmptyString(count)) then
+      hosts_scanned = tonumber(count)
+   end
+
+   local response = {
+      cve_count = count_cve,
+      scanned_hosts = hosts_scanned,
+      open_ports = open_ports_count,
+      hosts_count = hosts_count
+   }
+
+   return response
+end
+
 -- **********************************************************
 
 -- Function to retrieve hosts list to scan
@@ -590,6 +626,8 @@ function vs_utils.scan_host(scan_type, host, ports, scan_id)
    
    if scan_result then
       scan_result = vs_utils.scan_status.ok
+
+      ntop.incrCache(host_scannned_count_key)
    end
    if debug_print then
       traceError(TRACE_NORMAL,TRACE_CONSOLE,"End scan Host ".. host .. ", result: " .. result .. "\n")