65 lines
2 KiB
Ruby
65 lines
2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Gitlab
|
|
module Pagination
|
|
class OffsetHeaderBuilder
|
|
attr_reader :request_context, :per_page, :page, :next_page, :prev_page, :total, :total_pages
|
|
|
|
delegate :params, :header, :request, to: :request_context
|
|
|
|
def initialize(request_context:, per_page:, page:, next_page:, prev_page: nil, total:, total_pages:)
|
|
@request_context = request_context
|
|
@per_page = per_page
|
|
@page = page
|
|
@next_page = next_page
|
|
@prev_page = prev_page
|
|
@total = total
|
|
@total_pages = total_pages
|
|
end
|
|
|
|
def execute(exclude_total_headers: false, data_without_counts: false)
|
|
header 'X-Per-Page', per_page.to_s
|
|
header 'X-Page', page.to_s
|
|
header 'X-Next-Page', next_page.to_s
|
|
header 'X-Prev-Page', prev_page.to_s
|
|
header 'Link', pagination_links(data_without_counts)
|
|
|
|
return if exclude_total_headers || data_without_counts
|
|
|
|
header 'X-Total', total.to_s
|
|
header 'X-Total-Pages', total_pages.to_s
|
|
end
|
|
|
|
private
|
|
|
|
def pagination_links(data_without_counts)
|
|
[].tap do |links|
|
|
links << %(<#{page_href(page: prev_page)}>; rel="prev") if prev_page
|
|
links << %(<#{page_href(page: next_page)}>; rel="next") if next_page
|
|
links << %(<#{page_href(page: 1)}>; rel="first")
|
|
|
|
links << %(<#{page_href(page: total_pages)}>; rel="last") unless data_without_counts
|
|
end.join(', ')
|
|
end
|
|
|
|
def base_request_uri
|
|
@base_request_uri ||= URI.parse(request.url).tap do |uri|
|
|
uri.host = Gitlab.config.gitlab.host
|
|
uri.port = Gitlab.config.gitlab.port
|
|
end
|
|
end
|
|
|
|
def build_page_url(query_params:)
|
|
base_request_uri.tap do |uri|
|
|
uri.query = query_params
|
|
end.to_s
|
|
end
|
|
|
|
def page_href(next_page_params = {})
|
|
query_params = params.merge(**next_page_params, per_page: params[:per_page]).to_query
|
|
|
|
build_page_url(query_params: query_params)
|
|
end
|
|
end
|
|
end
|
|
end
|