46 lines
1.1 KiB
Ruby
46 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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module Api::Pagination
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extend ActiveSupport::Concern
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PAGINATION_PARAMS = %i(limit).freeze
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protected
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def pagination_max_id
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pagination_collection.last.id
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end
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def pagination_since_id
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pagination_collection.first.id
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end
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def set_pagination_headers(next_path = nil, prev_path = nil)
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links = []
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links << [next_path, [%w(rel next)]] if next_path
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links << [prev_path, [%w(rel prev)]] if prev_path
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response.headers['Link'] = LinkHeader.new(links).to_s unless links.empty?
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end
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def require_valid_pagination_options!
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render json: { error: 'Pagination values for `offset` and `limit` must be positive' }, status: 400 if pagination_options_invalid?
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end
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def pagination_params(core_params)
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params
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.slice(*PAGINATION_PARAMS)
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.permit(*PAGINATION_PARAMS)
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.merge(core_params)
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end
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private
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def insert_pagination_headers
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set_pagination_headers(next_path, prev_path)
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end
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def pagination_options_invalid?
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params.slice(:limit, :offset).values.map(&:to_i).any?(&:negative?)
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end
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end
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