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# Pagination is used to navigate paginateable collections module LHS::Pagination class Base DEFAULT_LIMIT = 100 delegate :_record, to: :data attr_accessor :data def initialize(data) self.data = data end # as standard in Rails' ActiveRecord count is not summing up, but using the number provided from data source def count total end def total data._raw.dig(*_record.total_key) end def limit data._raw.dig(*_record.limit_key) || DEFAULT_LIMIT end def offset data._raw.dig(*_record.pagination_key) || 0 end alias current_page offset alias start offset def pages_left total_pages - current_page end def next_offset(_step = 1) raise 'to be implemented in subclass' end def current_page raise 'to be implemented in subclass' end def first_page 1 end def last_page total_pages end def next? data._raw[:next].present? end def previous? data._raw[:previous].present? end def prev_page current_page - 1 end def next_page current_page + 1 end def limit_value limit end def total_pages (total.to_f / limit).ceil end def self.page_to_offset(page, _limit) page.to_i end end end
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10 entries across 10 versions & 1 rubygems