PRE_PAID_REDUCE_FACTOR settings and functionality

core/settings.rb

@@ -36,7 +36,8 @@
     ['USERS_DEFAULT_LANG', "en_US", "Default locale for new users", 1, "str"],
     ['VCENTER_CPU_LIMIT_FREQ_PER_CORE', "{\"default\":2000}", "Frequency per Core limit for different Nodes(don't remove default)", 1, "object"],
     ['VCENTER_DRIVES_IOPS', "{\"HDD\":350,\"SSD\":1000}", "IOPs limits for Drive types", 1, "object"],
-    ['VNETS_TEMPLATES', "{}", "VNs Types to VNs Templates mapping(types must be upper case)", 1, "object"]
+    ['VNETS_TEMPLATES', "{}", "VNs Types to VNs Templates mapping(types must be upper case)", 1, "object"],
+    ['PRE_PAID_REDUCE_FACTOR', "{\"0\": 1}", "Reduce factor for Pre-Paid VMs depending on billing period", 1, "object"]
   ]
   required.each do | record |
     begin

service/objects/vm.rb

@@ -397,7 +397,8 @@ def calculate_showback stime_req, etime_req, _group_by_day = false
       }
     elsif bp.include? 'PRE' then
       curr = self['/VM/STIME'].to_i
-      delta = bp.split('_')[1].to_i * 86400
+      period = bp.split('_')[1].to_i
+      delta = period * 86400
 
       total = 0
 
@@ -412,6 +413,18 @@ def calculate_showback stime_req, etime_req, _group_by_day = false
         curr += delta
       end
 
+      reduce_factor = 1
+      reduce_factors = IONe::Settings['PRE_PAID_REDUCE_FACTOR'].keys_to_i!.sort.to_h
+
+      reduce_factors.each do | period_key, factor |
+        if period >= period_key then
+          reduce_factor = factor
+        else
+          break
+        end
+      end
+      reduce_factor = reduce_factor.to_f
+
       return {
         id: id, name: name,
         total_billed: total, reduce_factor: reduce_factor,