tab/app/controllers/transactions_controller.rb

class TransactionsController < ApplicationController
  load_and_authorize_resource
  skip_before_filter :verify_authenticity_token, only: :create

  before_action :authenticate_user!, except: :create
  before_action :authenticate_user_or_client!, only: :create
  respond_to :js, only: :create

  def index
    @transactions = Transaction.all
  end

  def new
    @transaction = Transaction.new
  end

  def create
    transaction = Transaction.new(transaction_params)
    if transaction.save
      head :created
    else
      render json: transaction.errors.full_messages, status: :unprocessable_entity
    end
  end

  private

  def transaction_params
    t = params.require(:transaction)
          .permit(:debtor, :creditor, :message, :euros, :cents)

    {
      debtor: User.find_by(name: t[:debtor]) || User.zeus,
      creditor: User.find_by(name: t[:creditor]) || User.zeus,
      issuer: current_client || current_user,
      amount: (t[:euros].to_f*100 + t[:cents].to_f).to_i,
      message: t[:message]
    }
  end
end