Class: Paginator

Inherits:

Object

• Object
• Paginator

show all

Defined in:

lib/paginator.rb

Constant Summary

VERSION =

'0.1.0'

Instance Method Summary (collapse)

• - (Paginator) initialize(collection, per_page = 10) constructor

  Returns an instance of Paginator.

• - (Object) method_missing(method, *args, &block)
• - (Array<Object>) page(page)

  Returns an array of objects for page.

• - (Range) pages

  The total number of paginated pages.

• - (Boolean) respond_to?(method, with_private = false)

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# File 'lib/paginator.rb', line 8

def initialize collection, per_page = 10
  @collection = collection
  @per_page   = per_page
end

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# File 'lib/paginator.rb', line 36

def method_missing method, *args, &block
  if @collection.respond_to? method
    singleton_class.instance_eval do
      define_method(method) { |*args, &block|  @collection.send method, *args, &block }
    end

    @collection.send method, *args, &block
  else
    super
  end
end

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# File 'lib/paginator.rb', line 16

def page page
  startpoint = (@per_page * page) - @per_page 
  endpoint   = (@per_page * page) - 1
  @collection[startpoint..endpoint]
end

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# File 'lib/paginator.rb', line 24

def pages
  remainder = @collection.size % @per_page 
  
  if @collection.size == 0
    1..1
  elsif remainder == 0
    1..@collection.size / @per_page
  elsif remainder > 0
    1..(@collection.size / @per_page) + 1
  end
end

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# File 'lib/paginator.rb', line 48

def respond_to? method, with_private = false
  super || @collection.respond_to?(method, with_private)
end