Module: Lookbook::Params

Defined in:
lib/lookbook/params.rb

Class Method Summary collapse

Class Method Details

.build_param(param, default: nil, **opts) ⇒ Object 



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# File 'lib/lookbook/params.rb', line 6

def build_param(param, default: nil, **opts)
  input, options_str = param.text.present? ? param.text.split(" ", 2) : [nil, ""]
  type = param.types&.first
  options = if options_str.present? && options_str.end_with?(".json")
    json_path = if options_str.start_with?(".")
      File.expand_path(options_str, File.dirname(param.object.files.first[0]))
    else
      Rails.root.join(options_str)
    end
    JSON.parse(File.read(json_path))
  else
    YAML.safe_load(options_str || "~")
  end
  input ||= guess_input(type, default)
  type ||= guess_type(input, default)
  {
    name: param.name,
    input: input_text?(input) ? "text" : input,
    input_type: (input if input_text?(input)),
    options: options,
    type: type,
    default: default
  }
end

.cast(value, type = "String") ⇒ Object 



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# File 'lib/lookbook/params.rb', line 48

def cast(value, type = "String")
  case type.downcase
  when "symbol"
    value.presence&.delete_prefix(":")&.to_sym
  when "hash"
    result = safe_parse_yaml(value, {})
    unless result.is_a? Hash
      Lookbook.logger.debug "Failed to parse '#{value}' into a Hash"
      result = {}
    end
    result
  when "array"
    result = safe_parse_yaml(value, [])
    unless result.is_a? Array
      Lookbook.logger.debug "Failed to parse '#{value}' into an Array"
      result = []
    end
    result
  when "datetime"
    begin
      result = DateTime.parse(value)
    rescue Date::Error
      Lookbook.logger.debug "Failed to parse '#{value}' into a DateTime"
      result = DateTime.now
    end
    result
  else
    begin
      type_class = "ActiveModel::Type::#{type}".constantize
      type_class.new.cast(value)
    rescue NameError
      raise ArgumentError, "'#{type}' is not a valid param type to cast to."
    end
  end
end

.parse_method_param_str(param_str) ⇒ Object 



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# File 'lib/lookbook/params.rb', line 31

def parse_method_param_str(param_str)
  return nil if param_str[0].nil? || param_str[1].nil?
  name = param_str[0].chomp(":")
  value = param_str[1]&.strip
  value = case value
  when "nil"
    nil
  else
    if value&.first == ":"
      value.delete_prefix(":").to_sym
    else
      YAML.safe_load(value)
    end
  end
  [name, value]
end