module DataTable extend ActiveSupport::Concern def apply_filter(user, params) p AjaxRequest.new(params) selection_to_json(user, user.transactions) end private class AjaxRequest def initialize(params) # Parsing according to https://datatables.net/manual/server-side @draw = params.require(:draw).to_i @start = params.require(:start).to_i @length = params.require(:length).to_i @columns = Hash.new params.require(:columns).each do |i, column| @columns[column.require(:data).to_sym] = { name: column[:name], searchable: column[:searchable] == 'true', orderable: column[:orderable] == 'true', search_value: column.require(:search)[:value] } end end end def selection_to_json(user, selection) { data: selection.map { |transaction| { amount: transaction.signed_amount_for(user), origin: transaction.origin, message: transaction.message, peer: transaction.peer_of(user).try(:name), time: transaction.created_at } } } end end