Reworked applications and categories tabs (#)

scripts/lua/rest/v2/get/interface/l7/cat_data.lua

@@ -0,0 +1,52 @@
+--
+-- (C) 2013-21 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+local rest_utils = require "rest_utils"
+local categories_utils = require "categories_utils"
+
+local rc = rest_utils.consts.success.ok
+local res = {}
+
+local ifid = _GET["ifid"]
+
+if isEmptyString(ifid) then
+   rc = rest_utils.consts.err.invalid_interface
+   rest_utils.answer(rc)
+   return
+end
+
+interface.select(ifid)
+
+local ifstats = interface.getStats()
+if ifstats and ifstats.ndpi_categories then
+    local total_bytes = 0
+    for _, value in pairs(ifstats.ndpi_categories or {}) do
+        -- calculate the total
+        local bytes_in = value["bytes.rcvd"]
+        local bytes_out = value["bytes.sent"]
+        total_bytes = total_bytes + bytes_in + bytes_out
+    end
+    for protocol, value in pairs(ifstats.ndpi_categories or {}) do
+        local bytes_in = value["bytes.rcvd"]
+        local bytes_out = value["bytes.sent"]
+        res[#res + 1] = {
+            category = {
+                name = protocol,
+                id = value.category
+            },
+            bytes = {
+                rcvd = bytes_in,
+                sent = bytes_out,
+                total = bytes_in + bytes_out,
+                percentage = math.floor(1 + (bytes_in + bytes_out) * 100 / total_bytes)
+            },
+            applications_list = categories_utils.get_category_protocols_list(value.category)
+        }
+    end
+end
+
+rest_utils.answer(rc, res)