Class: JSONAPI::Consumer::Paginating::Paginator

Inherits:
Object
  • Object
show all
Defined in:
lib/jsonapi/consumer/paginating/paginator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(result_set, data) ⇒ Paginator

Returns a new instance of Paginator.



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 12

def initialize(result_set, data)
  @params = params_for_uri(result_set.uri)
  @result_set = result_set
  @links = data["links"]
end

Instance Attribute Details

Returns the value of attribute links.



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 10

def links
  @links
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 10

def params
  @params
end

#result_set ⇒ Object (readonly)

Returns the value of attribute result_set.



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 10

def result_set
  @result_set
end

Instance Method Details

#current_page ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 62

def current_page
  params.fetch(page_param, 1).to_i
end

#first ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 26

def first
  result_set.links.fetch_link("first")
end

#last ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 30

def last
  result_set.links.fetch_link("last")
end

#next ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 18

def next
  result_set.links.fetch_link("next")
end

#next_page ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 74

def next_page
  current_page < total_pages ? (current_page + 1) : nil
end

#offset ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 52

def offset
  per_page * (current_page - 1)
end

#out_of_bounds? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 66

def out_of_bounds?
  current_page > total_pages
end

#per_page ⇒ Object Also known as: limit_value 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 56

def per_page
  params.fetch(per_page_param) do
    result_set.length
  end.to_i
end

#prev ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 22

def prev
  result_set.links.fetch_link("prev")
end

#previous_page ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 70

def previous_page
  current_page > 1 ? (current_page - 1) : nil
end

#total_count ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 50

def total_count; total_entries; end

#total_entries ⇒ Object

this number may be off



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 47

def total_entries
  per_page * total_pages
end

#total_pages ⇒ Object 



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# File 'lib/jsonapi/consumer/paginating/paginator.rb', line 34

def total_pages
  if links["last"]
    uri = result_set.links.link_url_for("last")
    last_params = params_for_uri(uri)
    last_params.fetch(page_param) do
      current_page
    end.to_i
  else
    current_page
  end
end