openfoodnetwork/lib/reporting/queries/query_builder.rb

# frozen_string_literal: true

module Reporting
  module Queries
    class QueryBuilder < QueryInterface
      include Joins
      include Tables
      include MaskData

      attr_reader :grouping_fields

      def initialize(model, grouping_fields = proc { [] })
        @grouping_fields = instance_exec(&grouping_fields)

        super(model.arel_table)
      end

      def selecting(lambda)
        fields = instance_exec(&lambda).map{ |key, value| value.as(key.to_s) }

        reflect query.project(*fields)
      end

      def scoped_to_orders(orders_relation)
        reflect query.where(
          line_item_table[:order_id].in(Arel.sql(orders_relation.to_sql))
        )
      end

      def scoped_to_line_items(line_items_relation)
        reflect query.where(
          line_item_table[:id].in(Arel.sql(line_items_relation.to_sql))
        )
      end

      def with_managed_orders(orders_relation)
        reflect query.
          outer_join(managed_orders_alias).
          on(
            managed_orders_alias[:id].eq(line_item_table[:order_id]).
            and(managed_orders_alias[:distributor_id].in(Arel.sql(orders_relation.to_sql)))
          )
      end

      def grouped_in_sets(group_sets)
        reflect query.group(*instance_exec(&group_sets))
      end

      def ordered_by(ordering_fields)
        reflect query.order(*instance_exec(&ordering_fields))
      end

      def distinct_results(fields = nil)
        return reflect query.distinct if fields.blank?

        reflect query.distinct_on(fields)
      end

      def variant_full_name
        display_name = variant_table[:display_name]
        display_as = variant_table[:display_as]
        options_text = variant_table[:unit_presentation]

        unit_to_display = coalesce(nullify_empty_strings(display_as), options_text)
        # rubocop:disable Rails/OutputSafety
        combined_description = sql_concat(display_name, raw("' ('"), unit_to_display, raw("')'"))
        # rubocop:enable Rails/OutputSafety

        Case.new.
          when(nullify_empty_strings(display_name).eq(nil)).then(unit_to_display).
          when(nullify_empty_strings(unit_to_display).not_eq(nil)).then(combined_description).
          else(display_name)
      end

      private

      def summary_row_title
        I18n.t("total", scope: i18n_scope)
      end

      def i18n_scope
        "admin.reports"
      end
    end
  end
end