Class: PageIterator

Inherits:
Object
  • Object
show all
Defined in:
lib/page_iterator.rb

Constant Summary collapse

DEFAULT_ITEMS_PER_PAGE = 
50

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(total_items, logfile, items_per_page = DEFAULT_ITEMS_PER_PAGE) ⇒ PageIterator

Returns a new instance of PageIterator.



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# File 'lib/page_iterator.rb', line 6

def initialize(total_items, logfile, items_per_page=DEFAULT_ITEMS_PER_PAGE)
  @total_items = total_items
  @items_per_page = items_per_page
  @logfile = logfile
  @current_page = current_page_from_file
end

Instance Attribute Details

#total_items ⇒ Object (readonly)

Returns the value of attribute total_items.



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# File 'lib/page_iterator.rb', line 4

def total_items
  @total_items
end

Instance Method Details

#each_remaining_page! ⇒ Object 



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# File 'lib/page_iterator.rb', line 49

def each_remaining_page!
  remaining_pages.each do |page| 
    yield page
    self.next!
  end
  self.next!
end

#next! ⇒ Object 



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# File 'lib/page_iterator.rb', line 27

def next!
  @current_page += 1
  log @current_page
end

#per_page ⇒ Object 



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# File 'lib/page_iterator.rb', line 13

def per_page
  @items_per_page
end

#previous! ⇒ Object 



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# File 'lib/page_iterator.rb', line 32

def previous!
  @current_page -= 1
  log @current_page
end

#remaining_items ⇒ Object 



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# File 'lib/page_iterator.rb', line 37

def remaining_items
  if @current_page > total_pages
    0
  else
    @total_items - (@current_page - 1) * @items_per_page
  end
end

#remaining_pages ⇒ Object 



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# File 'lib/page_iterator.rb', line 45

def remaining_pages
  @current_page..total_pages
end

#total_pages ⇒ Object 



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# File 'lib/page_iterator.rb', line 17

def total_pages
  pages = @total_items / @items_per_page
  if pages == 0
    1
  else
    last_page_items = @total_items % @items_per_page
    last_page_items > 0 ? pages + 1 : pages
  end
end