blob: e86e221e09206bf7d5e10dee87d3fc08d68fba4c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
module API
module Helpers
module Pagination
def paginate(relation)
relation.page(params[:page]).per(params[:per_page]).tap do |data|
add_pagination_headers(data)
end
end
private
def add_pagination_headers(paginated_data)
header 'X-Total', paginated_data.total_count.to_s
header 'X-Total-Pages', paginated_data.total_pages.to_s
header 'X-Per-Page', paginated_data.limit_value.to_s
header 'X-Page', paginated_data.current_page.to_s
header 'X-Next-Page', paginated_data.next_page.to_s
header 'X-Prev-Page', paginated_data.prev_page.to_s
header 'Link', pagination_links(paginated_data)
end
def pagination_links(paginated_data)
request_url = request.url.split('?').first
request_params = params.clone
request_params[:per_page] = paginated_data.limit_value
links = []
request_params[:page] = paginated_data.current_page - 1
links << %(<#{request_url}?#{request_params.to_query}>; rel="prev") unless paginated_data.first_page?
request_params[:page] = paginated_data.current_page + 1
links << %(<#{request_url}?#{request_params.to_query}>; rel="next") unless paginated_data.last_page? || paginated_data.out_of_range?
request_params[:page] = 1
links << %(<#{request_url}?#{request_params.to_query}>; rel="first")
request_params[:page] = paginated_data.total_pages
links << %(<#{request_url}?#{request_params.to_query}>; rel="last")
links.join(', ')
end
end
end
end
|
