fix: Update timezone to get wday from working_hours (#5605)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/models/working_hour.rb

@@ -40,7 +40,10 @@ class WorkingHour < ApplicationRecord
   validate :open_all_day_and_closed_all_day
 
   def self.today
-    find_by(day_of_week: Date.current.wday)
+    # While getting the day of the week, consider the timezone as well. `first` would 
+    # return the first working hour from the list of working hours available per week.
+    inbox = first.inbox
+    find_by(day_of_week: Time.zone.now.in_time_zone(inbox.timezone).to_date.wday)
   end
 
   def open_at?(time)

spec/models/working_hour_spec.rb

@@ -88,4 +88,18 @@ RSpec.describe WorkingHour do
                          'Validation failed: open_all_day and closed_all_day cannot be true at the same time')
     end
   end
+
+  context 'when on monday 9am in Sydney timezone' do
+    let(:inbox) { create(:inbox) }
+
+    before do
+      Time.zone = 'Australia/Sydney'
+      inbox.update(timezone: 'Australia/Sydney')
+      travel_to '10.10.2022 9:00 AEDT'
+    end
+
+    it 'is considered working hour' do
+      expect(described_class.today.open_now?).to be true
+    end
+  end
 end

spec/services/contacts/filter_service_spec.rb

@@ -167,6 +167,7 @@ describe ::Contacts::FilterService do
 
       context 'with x_days_before filter' do
         before do
+          Time.zone = 'UTC'
           el_contact.update(last_activity_at: (Time.zone.today - 4.days))
           cs_contact.update(last_activity_at: (Time.zone.today - 5.days))
           en_contact.update(last_activity_at: (Time.zone.today - 2.days))

spec/services/conversations/filter_service_spec.rb

@@ -309,6 +309,7 @@ describe ::Conversations::FilterService do
 
       context 'with x_days_before filter' do
         before do
+          Time.zone = 'UTC'
           en_conversation_1.update!(last_activity_at: (Time.zone.today - 4.days))
           en_conversation_2.update!(last_activity_at: (Time.zone.today - 5.days))
           user_2_assigned_conversation.update!(last_activity_at: (Time.zone.today - 2.days))