Class: RequestHandler::SortOptionHandler

Inherits:
OptionHandler show all
Defined in:
lib/request_handler/sort_option_handler.rb

Instance Method Summary collapse

Methods inherited from OptionHandler

#initialize

Constructor Details

This class inherits a constructor from RequestHandler::OptionHandler

Instance Method Details

#allowed_option(name) ⇒ Object 



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# File 'lib/request_handler/sort_option_handler.rb', line 36

def allowed_option(name)
  allowed_options_type&.call(name)
rescue Dry::Types::ConstraintError
  raise OptionNotAllowedError, name.to_sym => 'is not an allowed sort option'
end

#duplicates?(options) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/request_handler/sort_option_handler.rb', line 42

def duplicates?(options)
  !options.uniq!(&:field).nil?
end

#fetch_options ⇒ Object

Raises:



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# File 'lib/request_handler/sort_option_handler.rb', line 14

def fetch_options
  raise ExternalArgumentError, sort_options: 'the query paramter must not be empty' if empty_param?('sort')
  params.fetch('sort') { '' }.split(',')
end

#parse_option(option) ⇒ Object

Raises:



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# File 'lib/request_handler/sort_option_handler.rb', line 27

def parse_option(option)
  raise ExternalArgumentError, sort_options: 'must not contain a space' if option.include? ' '
  if option.start_with?('-')
    [option[1..-1], :desc]
  else
    [option, :asc]
  end
end

#parse_options(options) ⇒ Object 



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# File 'lib/request_handler/sort_option_handler.rb', line 19

def parse_options(options)
  options.map do |option|
    name, order = parse_option(option)
    allowed_option(name)
    SortOption.new(name, order)
  end
end

#run ⇒ Object

Raises:



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# File 'lib/request_handler/sort_option_handler.rb', line 7

def run
  return [] unless params.key?('sort')
  sort_options = parse_options(fetch_options)
  raise ExternalArgumentError, sort_options: 'must be unique' if duplicates?(sort_options)
  sort_options
end