#306

backend/app/services/material_sync_suppression_registrar.rb

@@ -0,0 +1,37 @@
+class MaterialSyncSuppressionRegistrar
+  def self.create! attributes, created_by_user:
+    new(attributes, created_by_user:).create!
+  end
+
+  def initialize attributes, created_by_user:
+    @attributes = attributes
+    @created_by_user = created_by_user
+  end
+
+  def create!
+    suppression = nil
+
+    MaterialSyncSuppression.transaction do
+      suppression = MaterialSyncSuppression.create!(
+          @attributes.merge(created_by_user: @created_by_user))
+      discard_existing_materials!(suppression)
+    end
+
+    suppression
+  end
+
+  private
+
+  def discard_existing_materials! suppression
+    Material.unscoped
+            .kept
+            .where(normalized_source_key: suppression.normalized_source_key)
+            .find_each do |material|
+      MaterialVersionRecorder.ensure_snapshot!(material, created_by_user: @created_by_user)
+      material.discard!
+      MaterialVersionRecorder.record!(material:,
+                                      event_type: :discard,
+                                      created_by_user: @created_by_user)
+    end
+  end
+end