Sha256: aba5a8897c1e7c805f73833ad1e42087e0ef7fe909b67d5dff3b34940e9dc408
Contents?: true
Size: 1.52 KB
Versions: 18
Compression:
Stored size: 1.52 KB
Contents
module Paginate
class InvalidPage < ArgumentError
def initialize(page, page_num)
super "#{page.inspect} given as value, which translates to '#{page_num}' as page number"
end
end
class Collection < Array
attr_reader :current_page, :per_page, :total_entries, :total_pages
def initialize(page, per_page, total = nil)
@current_page = page.to_i
raise InvalidPage.new(page, @current_page) if @current_page < 1
@per_page = per_page.to_i
raise ArgumentError, "`per_page` setting cannot be less than 1 (#{@per_page} given)" if @per_page < 1
self.total_entries = total if total
end
def self.create(page, per_page, total = nil)
pager = new(page, per_page, total)
yield pager
pager
end
def out_of_bounds?
current_page > total_pages
end
def offset
(current_page - 1) * per_page
end
def previous_page
current_page > 1 ? (current_page - 1) : nil
end
def next_page
current_page < total_pages ? (current_page + 1) : nil
end
def total_entries=(number)
@total_entries = number.to_i
@total_pages = (@total_entries / per_page.to_f).ceil
end
def replace(array)
result = super
# The collection is shorter then page limit? Rejoice, because
# then we know that we are on the last page!
if total_entries.nil? and length < per_page and (current_page == 1 or length > 0)
self.total_entries = offset + length
end
result
end
end
end
Version data entries
18 entries across 18 versions & 2 rubygems