Pagination with angular-paginate-anything and kaminari

base_controller.rb

class Api::BaseController < ApplicationController
    include Rivalry::OrganizationScope
    respond_to :json

    private 
    def self.paginated_action(options = {})
        before_filter(options) do |controller|
            if request.headers['Range-Unit'] == 'items' &&
                    request.headers['Range'].present?

                requested_from = nil
                requested_to = nil

                if request.headers['Range'] =~ /(\d+)-(\d*)/
                    requested_from, requested_to = $1.to_i, ($2.present? ? $2.to_i : Float::INFINITY)
                end

                if (requested_from > requested_to)
                  response.status = 416
                  headers['Content-Range'] = "*/#{total_items}"
                  render text: 'invalid pagination range'
                  return false
                end

                @kp_per_page = requested_to - requested_from + 1
                @kp_page = requested_to / @kp_per_page + 1
            end
        end

        after_filter(options) do |controller|
            results = instance_variable_get("@#{controller_name}") # ex @users
            if(results.length > 0)
                response.status = 206
                headers['Accept-Ranges'] = 'items'
                headers['Range-Unit'] = 'items'

                total_items = results.total_count
                current_page = results.current_page
                per = @kp_per_page

                requested_from = (results.current_page - 1) * per
                available_to = (results.length - 1) + requested_from

                headers['Content-Range'] = "#{requested_from}-#{available_to}/#{total_items < Float::INFINITY ? total_items : '*'}"
            else 
                response.status = 204
                headers['Content-Range'] = "*/0"
            end
        end
    end
end

users.html

<div class='paginated_container' ng-controller='PaginatedUserListCtrl'>
    <bgf-pagination url='users_url' url-params='user_params' collection='users' per-page="10"></bgf-pagination>
    <table>
    <tbody>
        <tr ng-repeat="user in users">
            <td>{{user.name}}</td>
        </tr>
    </tbody>
    </table>
</div>

users.js

angular.module('vijedi').
    .controller('PaginatedUserListCtrl', ['$scope', function($scope) {
        $scope.users_url = '/api/users/.json'; # defined here in case the url needs to be manipulated
        $scope.user_params = {
            status: 'active'
        };
    }])

users_controller.rb

class Api::UsersController < Api::BaseController
    paginated_action only: [:index]

    def index
        @users = User.by_name.where(status: params[:status]) # needs to be assigned so the lookup in the filter works 
            .page(@kp_page)
            .per(@kp_per_page)

        respond_with @users
    end
end