module SerialFetcher

# File lib/serial_fetcher.rb, line 11
def self.configure
  self.configuration ||= Configuration.new
  yield(configuration) if block_given?
end

# File lib/serial_fetcher.rb, line 17
def self.fetch(params, schema={})
  config = self.configuration ||= Configuration.new
  fetcher = config.fetcher

  raise "You must provide a fetcher method." if fetcher.nil?
  raise "You must provide a hash for params." if params.nil?
  raise "You must provide the key id for the basic resource to be fetched." if schema[:id].nil?

  params.keys.each_with_object({}) do |k, res|
    key_id = schema[k]
    if key_id
      param_name = key_id.to_s
      res[key_id] = fetcher.(param_name, params[k])
    else
      if /.*_id/.match(k.to_s)
        param_name = k.to_s.split('_id').first
        res[param_name.to_sym] = fetcher.(param_name, params[k])
      end
    end
  end
end