Fixed issue #2574 - Every night tickets are updated (system need to use SLAs).

app/models/calendar.rb

@@ -166,9 +166,7 @@ returns
       end
 
       # sync with public_holidays
-      if !public_holidays
+      self.public_holidays ||= {}
-        self.public_holidays = {}
-      end
 
       # remove old ical entries if feed has changed
       public_holidays.each do |day, meta|
@@ -180,13 +178,14 @@ returns
 
       # sync new ical feed dates
       events.each do |day, summary|
-        if !public_holidays[day]
+        public_holidays[day] ||= {}
-          public_holidays[day] = {}
-        end
 
         # ignore if already added or changed
         next if public_holidays[day].key?('active')
 
+        # entry already exists
+        next if summary == public_holidays[day][:summary]
+
         # create new entry
         public_holidays[day] = {
           active:  true,

app/models/observer/sla/ticket_rebuild_escalation.rb

@@ -4,6 +4,8 @@ class Observer::Sla::TicketRebuildEscalation < ActiveRecord::Observer
   observe 'sla', 'calendar'
 
   def after_commit(record)
+    return if _check(record)
+
     _rebuild(record)
   end
 
@@ -37,7 +39,7 @@ class Observer::Sla::TicketRebuildEscalation < ActiveRecord::Observer
     end
     return true if !changed
 
-    _rebuild(record)
+    false
   end
 
 end

spec/models/calendar_spec.rb

@@ -86,7 +86,7 @@ RSpec.describe Calendar, type: :model do
 
   describe '#sync' do
     subject(:calendar) do
-      create(:calendar, ical_url: Rails.root.join('test', 'data', 'calendar', 'calendar1.ics'))
+      create(:calendar, ical_url: Rails.root.join('test', 'data', 'calendar', 'calendar1.ics'), default: false)
     end
 
     before { travel_to Time.zone.parse('2017-08-24T01:04:44Z0') }
@@ -105,6 +105,27 @@ RSpec.describe Calendar, type: :model do
           expect { calendar.sync }
             .not_to change { calendar.public_holidays }
         end
+        it 'does not create a background job for escalation rebuild' do
+          calendar  # create and sync (1 inital background job is created)
+          expect { calendar.sync } # a second sync right after calendar create
+            .to not_change { Delayed::Job.count }
+        end
+      end
+
+      context 'and current date has changed but neither public_holidays nor iCal URL have changed (past cache expiry)' do
+        before do
+          calendar  # create and sync
+          travel 2.days
+        end
+
+        it 'is idempotent' do
+          expect { calendar.sync }
+            .not_to change { calendar.public_holidays }
+        end
+        it 'does not create a background job for escalation rebuild' do
+          expect { calendar.sync }
+            .not_to change { Delayed::Job.count }
+        end
       end
 
       context 'and current date has changed (past cache expiry)' do
@@ -122,6 +143,10 @@ RSpec.describe Calendar, type: :model do
             '2020-12-24' => { 'active' => true, 'summary' => 'Christmas1', 'feed' => Digest::MD5.hexdigest(calendar.ical_url) },
           )
         end
+
+        it 'does create a background job for escalation rebuild' do
+          expect { calendar.sync }.to change { Delayed::Job.count }.by(1)
+        end
       end
 
       context 'and iCal URL has changed' do