Add a basic description method to GovukGuix::DataSnapshot

This is for use when rendering these in a view.

1 files changed, 18 insertions, 0 deletions

diff --git a/app/models/govuk_guix/data_snapshot.rb b/app/models/govuk_guix/data_snapshot.rb
index ec40cc4..bdfcd7e 100644
--- a/app/models/govuk_guix/data_snapshot.rb
+++ b/app/models/govuk_guix/data_snapshot.rb
@@ -40,4 +40,22 @@ class GovukGuix::DataSnapshot < ApplicationRecord
     foreign_key: 'govuk_guix_revision_commit_hash'
   )
   belongs_to :backend, polymorphic: true, optional: true
+
+  def description
+    extracts_by_database = manifest['extracts']
+
+    dates = extracts_by_database.flat_map do |_, extracts|
+      extracts.map do |extract|
+        extract['datetime']
+      end
+    end
+
+    all_services = extracts_by_database.flat_map do |_, extracts|
+      extracts.map do |extract|
+        extract['services']
+      end
+    end
+
+    "#{dates.uniq.join(', ')}: #{all_services.join(', ')}"
+  end
 end