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# frozen_string_literal: true
require 'pagy'
class Pagy
class Countless < Pagy
INSTANCE_VARS_MIN = { items: 1, page: 1, outset: 0 }.freeze
# Merge and validate the options, do some simple arithmetic and set a few instance variables
def initialize(vars={}) # rubocop:disable Lint/MissingSuper
@vars = VARS.merge(vars.delete_if{|_,v| v.nil? || v == '' }) # default vars + cleaned vars (can be overridden)
INSTANCE_VARS_MIN.each do |k,min| # validate instance variables
raise VariableError.new(self), "expected :#{k} >= #{min}; got #{@vars[k].inspect}" \
unless @vars[k] && instance_variable_set(:"@#{k}", @vars[k].to_i) >= min
end
@offset = @items * (@page - 1) + @outset # pagination offset + outset (initial offset)
end
# Finalize the instance variables based on the fetched items
def finalize(fetched)
raise OverflowError.new(self), "page #{@page} got no items" \
if fetched.zero? && @page > 1
@pages = @last = (fetched > @items ? @page + 1 : @page) # set the @pages and @last
@items = fetched if fetched < @items && fetched.positive? # adjust items for last non-empty page
@from = fetched.zero? ? 0 : @offset + 1 - @outset # page begins from item
@to = fetched.zero? ? 0 : @offset + @items - @outset # page ends to item
@prev = (@page-1 unless @page == 1) # nil if no prev page
@next = @page == @last ? (1 if @vars[:cycle]) : @page + 1 # nil if no next page, 1 if :cycle
self
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems