73 lines
2.5 KiB
Ruby
73 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Pagination
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class GitalyKeysetPager
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attr_reader :request_context, :project
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delegate :params, to: :request_context
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def initialize(request_context, project)
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@request_context = request_context
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@project = project
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end
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# It is expected that the given finder will respond to `execute` method with `gitaly_pagination: true` option
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# and supports pagination via gitaly.
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def paginate(finder)
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return paginate_via_gitaly(finder) if keyset_pagination_enabled?
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return paginate_first_page_via_gitaly(finder) if paginate_first_page?
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branches = ::Kaminari.paginate_array(finder.execute)
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Gitlab::Pagination::OffsetPagination
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.new(request_context)
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.paginate(branches)
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end
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private
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def keyset_pagination_enabled?
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Feature.enabled?(:branch_list_keyset_pagination, project, default_enabled: :yaml) && params[:pagination] == 'keyset'
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end
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def paginate_first_page?
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Feature.enabled?(:branch_list_keyset_pagination, project, default_enabled: :yaml) && (params[:page].blank? || params[:page].to_i == 1)
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end
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def paginate_via_gitaly(finder)
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finder.execute(gitaly_pagination: true).tap do |records|
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apply_headers(records)
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end
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end
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# When first page is requested, we paginate the data via Gitaly
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# Headers are added to immitate offset pagination, while it is the default option
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def paginate_first_page_via_gitaly(finder)
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finder.execute(gitaly_pagination: true).tap do |records|
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total = project.repository.branch_count
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per_page = params[:per_page].presence || Kaminari.config.default_per_page
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Gitlab::Pagination::OffsetHeaderBuilder.new(
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request_context: request_context, per_page: per_page, page: 1, next_page: 2,
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total: total, total_pages: total / per_page + 1
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).execute
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end
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end
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def apply_headers(records)
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if records.count == params[:per_page]
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Gitlab::Pagination::Keyset::HeaderBuilder
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.new(request_context)
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.add_next_page_header(
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query_params_for(records.last)
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)
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end
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end
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def query_params_for(record)
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# NOTE: page_token is name for now, but it could be dynamic if we have other gitaly finders
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# that is based on something other than name
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{ page_token: record.name }
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end
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end
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end
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end
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