compute right nb of free seats for event reservation

also: copy nb_total_places to n+1 instances when creating recurrent
availabilities

app/models/event.rb

@@ -98,7 +98,7 @@ class Event < ActiveRecord::Base
          else
            nil
          end
-    r = Recurrence.new(every: recurrence, on: on, starts: availability.start_at+1.day, until: recurrence_end_at)
+    r = Recurrence.new(every: recurrence, on: on, starts: availability.start_at + 1.day, until: recurrence_end_at)
     r.events.each do |date|
       days_diff = availability.end_at.day - availability.start_at.day
       start_at = DateTime.new(
@@ -110,7 +110,7 @@ class Event < ActiveRecord::Base
         availability.start_at.sec,
         availability.start_at.zone
       )
-      start_at = dst_correction(availability.start_at,start_at)
+      start_at = dst_correction(availability.start_at, start_at)
       end_date = date + days_diff.days
       end_at = DateTime.new(
         end_date.year,
@@ -121,7 +121,7 @@ class Event < ActiveRecord::Base
         availability.end_at.sec,
         availability.end_at.zone
       )
-      end_at = dst_correction(availability.start_at,end_at)
+      end_at = dst_correction(availability.start_at, end_at)
       ei = EventImage.new(attachment: event_image.attachment) if event_image
       efs = event_files.map do |f|
         EventFile.new(attachment: f.attachment)

app/models/reservation.rb

@@ -244,8 +244,11 @@ class Reservation < ActiveRecord::Base
   end
 
   def total_booked_seats
-    total = 0
-    total = nb_reserve_places if slots.first.canceled_at
+    # cases:
+    # - machine/training/space reservation => 1 slot = 1 seat (currently not covered by this function)
+    # - event reservation => seats = nb_reserve_place (normal price) + tickets.booked (other prices)
+    total = nb_reserve_places
+    total = 0 if slots.first.canceled_at
     total += tickets.map(&:booked).map(&:to_i).reduce(:+) if tickets.count.positive?
 
     total

app/services/availabilities/create_availabilities_service.rb

@@ -20,7 +20,8 @@ class Availabilities::CreateAvailabilitiesService
         machine_ids: availability.machine_ids,
         training_ids: availability.training_ids,
         space_ids: availability.space_ids,
-        tag_ids: availability.tag_ids
+        tag_ids: availability.tag_ids,
+        nb_total_places: availability.nb_total_places
       ).save!
     end
   end