90 lines
2.3 KiB
Ruby
90 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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module Packages
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class BuildInfosFinder
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include ActiveRecord::ConnectionAdapters::Quoting
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MAX_PAGE_SIZE = 100
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def initialize(package_ids, params)
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@package_ids = package_ids
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@params = params
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end
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def execute
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return Packages::BuildInfo.none if @package_ids.blank?
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# This is a highly custom query that
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# will not be re-used elsewhere
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# rubocop: disable CodeReuse/ActiveRecord
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query = Packages::Package.id_in(@package_ids)
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.select('build_infos.*')
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.from([Packages::Package.arel_table, lateral_query.arel.lateral.as('build_infos')])
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.order('build_infos.id DESC')
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# We manually select build_infos fields from the lateral query.
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# Thus, we need to instruct ActiveRecord that returned rows are
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# actually Packages::BuildInfo objects
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Packages::BuildInfo.find_by_sql(query.to_sql)
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# rubocop: enable CodeReuse/ActiveRecord
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end
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private
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def lateral_query
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order_direction = last ? :asc : :desc
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# This is a highly custom query that
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# will not be re-used elsewhere
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# rubocop: disable CodeReuse/ActiveRecord
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where_condition = Packages::BuildInfo.arel_table[:package_id]
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.eq(Arel.sql("#{Packages::Package.table_name}.id"))
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build_infos = ::Packages::BuildInfo.without_empty_pipelines
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.where(where_condition)
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.order(id: order_direction)
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.limit(max_rows_per_package_id)
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# rubocop: enable CodeReuse/ActiveRecord
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apply_cursor(build_infos)
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end
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def max_rows_per_package_id
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limit = [first, last, max_page_size, MAX_PAGE_SIZE].compact.min
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limit += 1 if support_next_page
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limit
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end
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def apply_cursor(build_infos)
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if before
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build_infos.with_pipeline_id_greater_than(before)
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elsif after
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build_infos.with_pipeline_id_less_than(after)
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else
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build_infos
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end
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end
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def first
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@params[:first]
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end
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def last
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@params[:last]
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end
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def max_page_size
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@params[:max_page_size]
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end
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def before
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@params[:before]
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end
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def after
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@params[:after]
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end
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def support_next_page
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@params[:support_next_page]
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end
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end
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end
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