Class: Dimples::Pager

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/dimples/pager.rb

Constant Summary collapse

PER_PAGE = 
5

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, posts, options = {}) ⇒ Pager

Returns a new instance of Pager.



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# File 'lib/dimples/pager.rb', line 11

def initialize(url, posts, options = {})
  @url = url
  @posts = posts
  @per_page = options.fetch(:per_page, PER_PAGE)
  @page_prefix = options.fetch(:page_prefix, "page_")
  @page_count = (posts.length.to_f / @per_page.to_i).ceil

  step_to(1)
end

Instance Attribute Details

#current_page ⇒ Object (readonly)

Returns the value of attribute current_page.



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# File 'lib/dimples/pager.rb', line 9

def current_page
  @current_page
end

#next_page ⇒ Object (readonly)

Returns the value of attribute next_page.



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# File 'lib/dimples/pager.rb', line 9

def next_page
  @next_page
end

#page_count ⇒ Object (readonly)

Returns the value of attribute page_count.



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# File 'lib/dimples/pager.rb', line 9

def page_count
  @page_count
end

#previous_page ⇒ Object (readonly)

Returns the value of attribute previous_page.



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# File 'lib/dimples/pager.rb', line 9

def previous_page
  @previous_page
end

Instance Method Details

#current_page_url ⇒ Object 



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# File 'lib/dimples/pager.rb', line 45

def current_page_url
  (@current_page != 1) ? "#{@url}#{@page_prefix}#{@current_page}" : @url
end

#each(&block) ⇒ Object 



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# File 'lib/dimples/pager.rb', line 21

def each(&block)
  (1..@page_count).each { |index| block.yield step_to(index) }
end

#first_page_url ⇒ Object 



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# File 'lib/dimples/pager.rb', line 49

def first_page_url
  @url
end

#last_page_url ⇒ Object 



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# File 'lib/dimples/pager.rb', line 53

def last_page_url
  (@page_count != 1) ? "#{@url}#{@page_prefix}#{@page_count}" : @url
end

#next_page? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dimples/pager.rb', line 41

def next_page?
  @current_page + 1 <= @page_count
end

#next_page_url ⇒ Object 



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# File 'lib/dimples/pager.rb', line 63

def next_page_url
  "#{@url}#{@page_prefix}#{@next_page}" if @next_page
end

#posts_at(page) ⇒ Object 



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# File 'lib/dimples/pager.rb', line 33

def posts_at(page)
  @posts.slice((page - 1) * @per_page, @per_page)
end

#previous_page? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dimples/pager.rb', line 37

def previous_page?
  (@current_page - 1).positive?
end

#previous_page_url ⇒ Object 



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# File 'lib/dimples/pager.rb', line 57

def previous_page_url
  return unless @previous_page

  (@previous_page != 1) ? "#{@url}#{@page_prefix}#{@previous_page}" : @url
end

#step_to(page) ⇒ Object 



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# File 'lib/dimples/pager.rb', line 25

def step_to(page)
  @current_page = page
  @previous_page = previous_page? ? @current_page - 1 : nil
  @next_page = next_page? ? @current_page + 1 : nil

  @current_page
end

#to_context ⇒ Object 



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# File 'lib/dimples/pager.rb', line 67

def to_context
  {
    posts: posts_at(current_page),
    current_page: @current_page,
    page_count: @page_count,
    post_count: @posts.count,
    previous_page: @previous_page,
    next_page: @next_page,
    urls: {
      current_page: current_page_url,
      first_page: first_page_url,
      last_page: last_page_url,
      previous_page: previous_page_url,
      next_page: next_page_url
    }
  }
end