48 lines
1.4 KiB
Ruby
48 lines
1.4 KiB
Ruby
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# frozen_string_literal: true
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module Gitlab
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module Pagination
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module Keyset
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# A Page models the pagination information for a particular page of the collection
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class Page
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# Default number of records for a page
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DEFAULT_PAGE_SIZE = 20
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# Maximum number of records for a page
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MAXIMUM_PAGE_SIZE = 100
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attr_accessor :lower_bounds, :end_reached
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attr_reader :order_by
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def initialize(order_by: {}, lower_bounds: nil, per_page: DEFAULT_PAGE_SIZE, end_reached: false)
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@order_by = order_by.symbolize_keys
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@lower_bounds = lower_bounds&.symbolize_keys
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@per_page = per_page
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@end_reached = end_reached
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end
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# Number of records to return per page
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def per_page
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return DEFAULT_PAGE_SIZE if @per_page <= 0
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[@per_page, MAXIMUM_PAGE_SIZE].min
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end
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# Determine whether this page indicates the end of the collection
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def end_reached?
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@end_reached
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end
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# Construct a Page for the next page
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# Uses identical order_by/per_page information for the next page
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def next(lower_bounds, end_reached)
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dup.tap do |next_page|
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next_page.lower_bounds = lower_bounds&.symbolize_keys
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next_page.end_reached = end_reached
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end
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end
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end
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end
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end
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end
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