Class: Dslh

Inherits:
Object
  • Object
show all
Defined in:
lib/dslh.rb,
lib/dslh/version.rb

Defined Under Namespace

Classes: Scope, ScopeBlock, ValidationError

Constant Summary collapse

INDENT_SPACES = 
'  '
VALID_OPTIONS = 
[
  :allow_duplicate,
  :allow_empty_args,
  :conv,
  :dump_old_hash_array_format,
  :exclude_key,
  :filename,
  :force_dump_braces,
  :ignore_methods,
  :initial_depth,
  :key_conv,
  :lineno,
  :root_identify,
  :schema,
  :schema_path,
  :scope_hook,
  :scope_vars,
  :time_inspecter,
  :use_braces_instead_of_do_end,
  :value_conv,
  :use_heredoc_for_multi_line,
]
VERSION = 
'0.4.11'

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Dslh

of class methods



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# File 'lib/dslh.rb', line 75

def initialize(options = {})
  invlid_options = options.keys - VALID_OPTIONS

  unless invlid_options.empty?
    raise ArgumentError, 'invalid option ' + invlid_options.map {|i| i.inspect }.join(',')
  end

  @options = {
    :time_inspecter => method(:inspect_time),
    :dump_old_hash_array_format => false,
    :force_dump_braces => false,
    :use_braces_instead_of_do_end => false,
    :use_heredoc_for_multi_line => false,
  }.merge(options)

  @options[:key_conv] ||= (@options[:conv] || proc {|i| i.to_s })
  @options[:value_conv] ||= @options[:conv]
end

Class Method Details

.deval(hash, options = {}, &block) ⇒ Object 



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# File 'lib/dslh.rb', line 66

def deval(hash, options = {}, &block)
  if [hash, options].any? {|i| not i.kind_of?(Hash) }
    raise TypeError, "wrong argument type #{options.class} (expected Hash)"
  end

  self.new(options).deval(hash, &block)
end

.eval(expr_or_options = nil, options = nil, &block) ⇒ Object 



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# File 'lib/dslh.rb', line 44

def eval(expr_or_options = nil, options = nil, &block)
  if options and not options.kind_of?(Hash)
    raise TypeError, "wrong argument type #{options.class} (expected Hash)"
  end

  expr = nil
  options ||= {}

  if expr_or_options
    case expr_or_options
    when String
      expr = expr_or_options
    when Hash
      options.update(expr_or_options)
    else
      raise TypeError, "wrong argument type #{expr_or_options.class} (expected String or Hash)"
    end
  end

  self.new(options).eval(expr, &block)
end

Instance Method Details

#deval(hash) ⇒ Object 



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# File 'lib/dslh.rb', line 182

def deval(hash)
  buf = StringIO.new
  depth = @options[:initial_depth] || 0
  deval0(hash, depth, buf, true)
  buf.string
end

#eval(expr = nil, &block) ⇒ Object 



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# File 'lib/dslh.rb', line 94

def eval(expr = nil, &block)
  retval = {}
  scope = Scope.new
  scope.instance_variable_set(:@__options__, @options)
  scope.instance_variable_set(:@__hash__, retval)
  @options[:scope_hook].call(scope) if @options[:scope_hook]

  (@options[:scope_vars] || {}).each do |name, value|
    scope.instance_variable_set("@#{name}", value)
  end

  if @options[:ignore_methods]
    ignore_methods = Array(@options[:ignore_methods])

    ignore_methods.each do |method_name|
      scope.instance_eval(<<-EOS)
        def #{method_name}(*args, &block)
          method_missing(#{method_name.to_s.inspect}, *args, &block)
        end
      EOS
    end
  end

  if expr
    eval_args = [expr]

    [:filename, :lineno].each do |k|
      eval_args << @options[k] if @options[k]
    end

    scope.instance_eval(*eval_args)
  else
    scope.instance_eval(&block)
  end

  if (schema = @options[:schema] || schema_path = @options[:schema_path])
    begin
      require 'kwalify'
    rescue LoadError
      raise 'cannot load "kwalify". please install "kwalify"'
    end

    if schema and not schema.kind_of?(String)
      raise TypeError, "wrong schema type #{schema.class} (expected String)"
    end

    if schema_path and not schema_path.kind_of?(String)
      raise TypeError, "wrong schema_path type #{schema_path.class} (expected String)"
    end

    schema = schema_path ? Kwalify::Yaml.load_file(schema_path) : Kwalify::Yaml.load(schema)
    validator = Kwalify::Validator.new(schema)

    if @options[:root_identify]
      new_retval = {}

      retval.each do |k, v|
        new_retval[k] = v.map {|_id, attrs|
          attrs.merge('_id' => _id)
        }
      end

      errors = validator.validate(new_retval)

      errors.each do |e|
        path = e.path.split('/', 4)[1..-1]
        root_key = path.shift
        _id = path.shift.to_i

        if _id_orig = new_retval.fetch(root_key, {})[_id]
          _id = _id_orig['_id'] || _id
        end

        path = '/' + ([root_key, _id] + path).join('/')
        e.path.replace(path)
      end
    else
      errors = validator.validate(retval)
    end

    unless errors.empty?
      raise ValidationError.new(errors, retval)
    end
  end

  return retval
end