add archive model

app/models/archive.rb

@@ -0,0 +1,51 @@
+# == Schema Information
+#
+# Table name: archives
+#
+#  id           :bigint           not null, primary key
+#  content_type :string           not null
+#  month        :date
+#  status       :string           not null
+#  created_at   :datetime         not null
+#  updated_at   :datetime         not null
+#
+class Archive < ApplicationRecord
+  include AASM
+
+  RETENTION_DURATION = 1.week
+
+  has_and_belongs_to_many :groupe_instructeurs
+
+  has_one_attached :file
+
+  scope :stale, -> { where('updated_at < ?', (Time.zone.now - RETENTION_DURATION)) }
+  scope :for_groupe_instructeur, -> (groupe_instructeur) {
+    joins(:archives_groupe_instructeurs)
+      .where(
+        archives_groupe_instructeurs: { groupe_instructeur: groupe_instructeur }
+      )
+  }
+
+  enum content_type: {
+    everything: 'everything',
+    monthly:    'monthly'
+  }
+
+  enum status: {
+    pending: 'pending',
+    generated: 'generated'
+  }
+
+  aasm whiny_persistence: true, column: :status, enum: true do
+    state :pending, initial: true
+    state :generated
+
+    event :make_available do
+      transitions from: :pending, to: :generated
+    end
+  end
+
+  def available?
+    status == 'generated' && file.attached?
+  end
+end

app/models/instructeur.rb

@@ -25,6 +25,7 @@ class Instructeur < ApplicationRecord
   has_many :followed_dossiers, through: :follows, source: :dossier
   has_many :previously_followed_dossiers, -> { distinct }, through: :previous_follows, source: :dossier
   has_many :trusted_device_tokens, dependent: :destroy
+  has_many :archives
 
   has_one :user, dependent: :nullify