Class: JsonApiPaginator

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(result_set, data) ⇒ JsonApiPaginator

Returns a new instance of JsonApiPaginator.



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

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

Instance Attribute Details

Returns the value of attribute links.



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

def links
  @links
end

#meta ⇒ Object (readonly)

Returns the value of attribute meta.



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

def meta
  @meta
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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

def params
  @params
end

#result_set ⇒ Object (readonly)

Returns the value of attribute result_set.



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

def result_set
  @result_set
end

Instance Method Details

#current_page ⇒ Object 



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

def current_page
  (params['page']['number'] || 1).to_i
end

#first ⇒ Object 



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# File 'lib/json_api_paginator.rb', line 21

def first
  links['first'] ? result_set.links.fetch_link('first') : nil
end

#last ⇒ Object 



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# File 'lib/json_api_paginator.rb', line 25

def last
  links['last'] ? result_set.links.fetch_link('last') : nil
end

#next ⇒ Object 



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

def next
  links['next'] ? result_set.links.fetch_link('next') : nil
end

#next_page ⇒ Object 



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# File 'lib/json_api_paginator.rb', line 56

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

#per_page ⇒ Object 



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# File 'lib/json_api_paginator.rb', line 44

def per_page
  params['page']['size'].to_i
end

#prev ⇒ Object 



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

def prev
  links['prev'] ? result_set.links.fetch_link('prev') : nil
end

#previous_page ⇒ Object 



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# File 'lib/json_api_paginator.rb', line 52

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

#total_entries ⇒ Object Also known as: total_count 



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# File 'lib/json_api_paginator.rb', line 39

def total_entries
  meta['total_count'].to_i || per_page * total_pages
end

#total_pages ⇒ Object 



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# File 'lib/json_api_paginator.rb', line 29

def total_pages
  if links['last']
    uri = result_set.links.link_url_for('last')
    last_params = params_for_uri(uri)
    last_params['page']['number'].to_i
  else
    current_page
  end
end