1 files changed, 61 insertions, 0 deletions
diff --git a/app/models/analytics/usage_trends/measurement.rb b/app/models/analytics/usage_trends/measurement.rb
new file mode 100644
index 00000000000..ad0272699c2
--- /dev/null
+++ b/app/models/analytics/usage_trends/measurement.rb
@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+module Analytics
+  module UsageTrends
+    class Measurement < ApplicationRecord
+      self.table_name = 'analytics_instance_statistics_measurements'
+
+      enum identifier: {
+        projects: 1,
+        users: 2,
+        issues: 3,
+        merge_requests: 4,
+        groups: 5,
+        pipelines: 6,
+        pipelines_succeeded: 7,
+        pipelines_failed: 8,
+        pipelines_canceled: 9,
+        pipelines_skipped: 10,
+        billable_users: 11
+      }
+
+      validates :recorded_at, :identifier, :count, presence: true
+      validates :recorded_at, uniqueness: { scope: :identifier }
+
+      scope :order_by_latest, -> { order(recorded_at: :desc) }
+      scope :with_identifier, -> (identifier) { where(identifier: identifier) }
+      scope :recorded_after, -> (date) { where(self.model.arel_table[:recorded_at].gteq(date)) if date.present? }
+      scope :recorded_before, -> (date) { where(self.model.arel_table[:recorded_at].lteq(date)) if date.present? }
+
+      def self.identifier_query_mapping
+        {
+          identifiers[:projects] => -> { Project },
+          identifiers[:users] => -> { User },
+          identifiers[:issues] => -> { Issue },
+          identifiers[:merge_requests] => -> { MergeRequest },
+          identifiers[:groups] => -> { Group },
+          identifiers[:pipelines] => -> { Ci::Pipeline },
+          identifiers[:pipelines_succeeded] => -> { Ci::Pipeline.success },
+          identifiers[:pipelines_failed] => -> { Ci::Pipeline.failed },
+          identifiers[:pipelines_canceled] => -> { Ci::Pipeline.canceled },
+          identifiers[:pipelines_skipped] => -> { Ci::Pipeline.skipped }
+        }
+      end
+
+      # Customized min and max calculation, in some cases using the original scope is too slow.
+      def self.identifier_min_max_queries
+        {}
+      end
+
+      def self.measurement_identifier_values
+        identifiers.values
+      end
+
+      def self.find_latest_or_fallback(identifier)
+        with_identifier(identifier).order_by_latest.first || identifier_query_mapping[identifiers[identifier]].call
+      end
+    end
+  end
+end
+
+Analytics::UsageTrends::Measurement.prepend_if_ee('EE::Analytics::UsageTrends::Measurement')