old-pruning-excersise/lib/api/app.rb

require 'json'
require 'sinatra/base'
require 'sinatra/custom_logger'
require_relative '../http/query'
require_relative '../exceptions'

module Pruning
  module API
    # Handles general concers regarding API calls
    class App < Sinatra::Base
      before { content_type :json }
      after  { serialise_response }
      set :show_exceptions, true

      error Pruning::Exceptions::UnexpectedError do
        status 500
      end

      error Pruning::Exceptions::OriginCannotFindTheResource do
        status 404
      end

      get '/' do
        'Try /tree/:name?indicator_ids[]=32&indicator_ids[]=31'
      end

      private

      def serialise_response
        return unless content_type == 'application/json'
        response.body = [JSON(response.body)]
      end

      def query
        Pruning::HTTP::Query.new(params)
      end
    end
  end
end