feat: add sla events table (#9126)

* feat: add sla events table

* chore: refactor to EE namespace

* chore: refactor

* chore: fix spec

* chore: add references to account,inbox,sla_policy

* chore: update specs

* chore: update spec to check backfilling id's

* Update spec/enterprise/models/sla_event_spec.rb

enterprise/app/models/applied_sla.rb

@@ -22,6 +22,8 @@ class AppliedSla < ApplicationRecord
   belongs_to :sla_policy
   belongs_to :conversation
 
+  has_many :sla_events, dependent: :destroy
+
   validates :account_id, uniqueness: { scope: %i[sla_policy_id conversation_id] }
   before_validation :ensure_account_id
 

enterprise/app/models/sla_event.rb

@@ -0,0 +1,52 @@
+# == Schema Information
+#
+# Table name: sla_events
+#
+#  id              :bigint           not null, primary key
+#  event_type      :integer
+#  meta            :jsonb
+#  created_at      :datetime         not null
+#  updated_at      :datetime         not null
+#  account_id      :bigint           not null
+#  applied_sla_id  :bigint           not null
+#  conversation_id :bigint           not null
+#  inbox_id        :bigint           not null
+#  sla_policy_id   :bigint           not null
+#
+# Indexes
+#
+#  index_sla_events_on_account_id       (account_id)
+#  index_sla_events_on_applied_sla_id   (applied_sla_id)
+#  index_sla_events_on_conversation_id  (conversation_id)
+#  index_sla_events_on_inbox_id         (inbox_id)
+#  index_sla_events_on_sla_policy_id    (sla_policy_id)
+#
+class SlaEvent < ApplicationRecord
+  belongs_to :account
+  belongs_to :inbox
+  belongs_to :conversation
+  belongs_to :sla_policy
+  belongs_to :applied_sla
+
+  enum event_type: { frt: 0, nrt: 1, rt: 2 }
+
+  before_validation :ensure_applied_sla_id, :ensure_account_id, :ensure_inbox_id, :ensure_sla_policy_id
+
+  private
+
+  def ensure_applied_sla_id
+    self.applied_sla_id ||= AppliedSla.find_by(conversation_id: conversation_id)&.last&.id
+  end
+
+  def ensure_account_id
+    self.account_id ||= conversation&.account_id
+  end
+
+  def ensure_inbox_id
+    self.inbox_id ||= conversation&.inbox_id
+  end
+
+  def ensure_sla_policy_id
+    self.sla_policy_id ||= applied_sla&.sla_policy_id
+  end
+end