Module: ActiveItem::Pagination

Defined in:
lib/active_item/pagination.rb

Defined Under Namespace

Classes: PaginatedResult

Constant Summary collapse

DEFAULT_PER_PAGE = 
25
MAX_PER_PAGE = 
100

Class Method Summary collapse

Class Method Details

.paginate_array(items, cursor = nil, per_page: DEFAULT_PER_PAGE) ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/active_item/pagination.rb', line 8

def self.paginate_array(items, cursor = nil, per_page: DEFAULT_PER_PAGE)
  per_page = [[per_page.to_i, 1].max, MAX_PER_PAGE].min

  if cursor && !cursor.empty?
    cursor_time, cursor_id = cursor.split('|', 2)
    items = items.drop_while { |i| ([(i.created_at || ''), i.id] <=> [cursor_time, cursor_id]) >= 0 }
  end

  page_items = items.first(per_page)
  has_more = items.length > per_page
  last = page_items.last
  next_cursor = has_more && last ? "#{last.created_at}|#{last.id}" : nil

  PaginatedResult.new(items: page_items, next_cursor: next_cursor, per_page: per_page)
end