Added probes filter to host page (#5157)

scripts/lua/modules/lua_utils.lua

@@ -618,6 +618,78 @@ end
 
 -- ##############################################
 
+function getProbesName(flowdevs)
+   local devips = {}
+
+   for dip, _ in pairsByValues(flowdevs, asc) do
+      local cached_device_name = snmp_cached_dev:create(dip)
+
+      if cached_device_name then
+         cached_device_name = cached_device_name["name"]
+      else
+         local hinfo = hostkey2hostinfo(dip)
+         local resname = hostinfo2label(hinfo)
+
+         if not isEmptyString(resname) then
+            cached_device_name = resname
+         end
+      end
+
+      devips[dip] = cached_device_name
+   end
+
+   return devips
+end
+
+-- ##############################################
+
+function printHostsDeviceFilterDropdown(base_url, page_params)
+   local snmp_cached_dev = require "snmp_cached_dev"
+   -- Getting probes
+   local flowdevs = interface.getFlowDevices() or {}
+   local ordering_fun = pairsByKeys
+   local cur_dev = _GET["deviceIP"]
+   local cur_dev_filter = ''
+   -- table.clone needed to modify some parameters while keeping the original unchanged
+   local dev_params = table.clone(page_params)
+   local devips = getProbesName(flowdevs)
+   local devips_order = ntop.getPref("ntopng.prefs.flow_table_probe_order") == "1" -- Order by Probe Name
+
+   if devips_order then
+      ordering_fun = pairsByValues
+   end
+
+   if not isEmptyString(cur_dev) then
+      cur_dev_filter = '<span class="fas fa-filter"></span>'
+   end
+
+   dev_params["deviceIP"] = nil
+
+   print[[
+      <button class="btn btn-link dropdown-toggle" data-bs-toggle="dropdown">]] print(i18n("flows_page.device_ip")) print[[]] print(cur_dev_filter) print[[<span class="caret"></span></button>\
+      <ul class="dropdown-menu dropdown-menu-end scrollable-dropdown" role="menu" id="flow_dropdown">\
+      <li><a class="dropdown-item" href="]] print(getPageUrl(base_url, dev_params)) print[[">]] print(i18n("flows_page.all_devices")) print[[</a></li>\]]
+   
+   for dev_ip, dev_resolved_name in ordering_fun(devips, asc) do
+      local dev_name = dev_ip
+      
+      dev_params["deviceIP"] = dev_name
+
+      if not isEmptyString(dev_resolved_name) and dev_resolved_name ~= dev_name then
+         dev_name = dev_name .. " ["..shortenString(dev_resolved_name).."]"
+      end
+
+      print[[
+      <li><a class="dropdown-item ]] print(dev_ip == cur_dev and 'active' or '') print[[" href="]] print(getPageUrl(base_url, dev_params)) print[[">]] print(i18n("flows_page.device_ip").." "..dev_name) print[[</a></li>\]]
+   end
+
+   print[[
+      </ul>\
+   ]]
+end
+
+-- ##############################################
+
 --
 -- Returns indexes to be used for string shortening. The portion of to_shorten between
 -- middle_start and middle_end will be inside the bounds.