Module: SlackRubyBotServer::Api::Helpers::CursorHelpers

Extended by:
ActiveSupport::Concern
Defined in:
lib/slack-ruby-bot-server/api/helpers/cursor_helpers.rb

Instance Method Summary collapse

Instance Method Details

#paginate_and_sort_by_cursor(coll, options = {}, &block) ⇒ Object 



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# File 'lib/slack-ruby-bot-server/api/helpers/cursor_helpers.rb', line 31

def paginate_and_sort_by_cursor(coll, options = {}, &block)
  Hashie::Mash.new(paginate_by_cursor(sort(coll, options), &block))
end

#paginate_by_cursor(coll, &_block) ⇒ Object

apply cursor-based pagination to a collection returns a hash:

results: (paginated collection subset)
next: (cursor to the next page)



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# File 'lib/slack-ruby-bot-server/api/helpers/cursor_helpers.rb', line 11

def paginate_by_cursor(coll, &_block)
  raise 'Both cursor and offset parameters are present, these are mutually exclusive.' if params.key?(:offset) && params.key?(:cursor)
  results = { results: [], next: nil }
  size = (params[:size] || 10).to_i
  if params.key?(:offset)
    skip = params[:offset].to_i
    coll = coll.skip(skip)
  end
  # some items may be skipped with a block
  query = block_given? ? coll : coll.limit(size)
  query.scroll(params[:cursor]) do |record, next_cursor|
    record = yield(record) if block_given?
    results[:results] << record if record
    results[:next] = next_cursor.to_s
    break if results[:results].count >= size
  end
  results[:total_count] = coll.count if params[:total_count] && coll.respond_to?(:count)
  results
end