frc-frecon/frecon

# lib/frecon/controllers/dump_controller.rb
#
# Copyright (C) 2014 Christopher Cooper, Sam Craig, Tiger Huang, Vincent Mai, Sam Mercier, and Kristofer Rye
#
# This file is part of FReCon, an API for scouting at FRC Competitions, which is
# licensed under the MIT license.  You should have received a copy of the MIT
# license with this program.  If not, please see
# <http://opensource.org/licenses/MIT>.

require 'json'
require 'frecon/models'

module FReCon
    # Public: The Dump controller.
    class DumpController

        # Public: Creates a dump.
        #
        # Returns a String containing a dump of the database.
        def self.full(params)
            dump = {}

            ordered_descendants = Model.descendants.select do |model_or_instance|
                !!model_or_instance.name
            end.sort_by do |model|
                id_fields = model.fields.keys.select do |attribute|
                    attribute.ends_with?('_id') && attribute != '_id'
                end

                [id_fields.count, dump_compliant_name(model)]
            end

            ordered_descendants.each do |child|
                dump[dump_compliant_name(child)] = child.all
            end

            dump.to_json
        end

        # Public: Converts a Model's name to a dump-compliant name.
        #
        # Examples
        #
        #   DumpController.dump_compliant_name(FReCon::Team)
        #   # => 'teams'
        #
        # Returns a dump-compliant string.
        def self.dump_compliant_name(model)
            model.name.gsub(/FReCon::/, '').downcase.pluralize
        end

    end
end