improved page layouts and added stats_utils for pie charts (#4653)

scripts/lua/rest/v1/get/host/l7/stats.lua

@@ -7,6 +7,7 @@ package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
 
 require "lua_utils"
 local rest_utils = require("rest_utils")
+local stats_utils = require("stats_utils")
 
 --
 -- Read statistics about nDPI application protocols for a hsot
@@ -63,19 +64,7 @@ tot = stats["bytes.sent"] + stats["bytes.rcvd"]
 
 local _ifstats = computeL7Stats(stats, show_breed, show_ndpi_category)
 
--- Print up to this number of entries
-local max_num_entries = 5
-
--- Print entries whose value >= 3% of the total
-local threshold = (tot * 3) / 100
-
-local num = 0
-local accumulate = 0
-
 for key, value in pairsByValues(_ifstats, rev) do
-   if(value < threshold) then
-      break
-   end
 
    local duration = 0
 
@@ -89,24 +78,8 @@ for key, value in pairsByValues(_ifstats, rev) do
       duration = duration,
    }
 
-   accumulate = accumulate + value
-   num = num + 1
-
-   if(num == max_num_entries) then
-      break
-   end
 end
 
-if(tot == 0) then
-   tot = 1
-end
+local collapsed = stats_utils.collapse_stats(res, 5, 3 --[[ threshold ]])
 
--- In case there is some leftover do print it as "Other"
-if(accumulate < tot) then
-   res[#res + 1] = {
-      label = i18n("other"),
-      value = (tot-accumulate),
-   }
-end
-
-rest_utils.answer(rc, res)
+rest_utils.answer(rc, collapsed)