Class: Dao::Validations::Validator

Inherits:
Object
  • Object
show all
Includes:
Common
Defined in:
lib/dao/validations/validator.rb

Constant Summary collapse

NotBlank = 
proc{|value| !value.to_s.strip.empty?}
Cleared = 
'Cleared'.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Common

#validates_all_of, #validates_any_of, #validates_as_email, #validates_as_phone, #validates_as_url, #validates_case_of, #validates_confirmation_of, #validates_inclusion_of, #validates_length_of, #validates_presence_of, #validates_type_of, #validates_value_of, #validates_word_count_of

Constructor Details

#initialize(*args, &block) ⇒ Validator

Returns a new instance of Validator.



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# File 'lib/dao/validations/validator.rb', line 37

def initialize(*args, &block)
  @object = args.shift
  @options = Map.options_for(args)

  if args.size == 1 and @object and @object.is_a?(Hash)
    object_keys = @object.keys.map{|key| key.to_s}
    option_keys = %w( object validations errors status )

    object_is_options = !object_keys.empty? && (object_keys - option_keys).empty?

    if object_is_options
      @options = Map.for(@object)
      @object = nil
    end
  end
  
  @object ||= (@options[:object] || Map.new)
  @validations ||= (@options[:validations] || Map.new)
  @errors ||= (@options[:errors] || Errors.new)
  @status ||= (@options[:status] || Status.new)

  unless @object.respond_to?(:validator)
    @object.send(:extend, Dao::Validations)
    @object.validator = self
  end

  @errors.object = @object

  #@object.extend(InstanceExec) unless @object.respond_to?(:instance_exec)
end

Instance Attribute Details

#errors ⇒ Object

Returns the value of attribute errors.



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# File 'lib/dao/validations/validator.rb', line 29

def errors
  @errors
end

#object ⇒ Object

Returns the value of attribute object.



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# File 'lib/dao/validations/validator.rb', line 26

def object
  @object
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/dao/validations/validator.rb', line 27

def options
  @options
end

#status ⇒ Object

Returns the value of attribute status.



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# File 'lib/dao/validations/validator.rb', line 30

def status
  @status
end

#validations ⇒ Object

Returns the value of attribute validations.



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# File 'lib/dao/validations/validator.rb', line 28

def validations
  @validations
end

Class Method Details

.mixin(*args, &block) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 19

def mixin(*args, &block)
  new(*args, &block).tap do |validator|
    validator.mixin = true
  end
end

Instance Method Details

#_run_validations(errors, list) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 224

def _run_validations(errors, list)
  Array(list).each do |validations|
    validations.each do |keys, chain|
      chain.each do |callback|
        next unless callback and callback.respond_to?(:to_proc)

        number_of_errors = errors.size
        value = attributes.get(keys)

        returned =
          catch(:validation) do
            args = Dao.args_for_arity([value, attributes], callback.arity)

            prefixing(keys) do
              object.instance_exec(*args, &callback)
            end
          end

        errors_added = errors.size > number_of_errors

        case returned
          when Hash
            map = Map.for(returned)
            valid = map[:valid]
            message = map[:message]
          when TrueClass, FalseClass
            valid = returned
            message = nil
          else
            valid = !errors_added
            message = nil
        end

        valid = false if errors_added

        message ||= callback.options[:message]
        message ||= (value.to_s.strip.empty? ? 'is blank' : 'is invalid')

        if not valid
          errors.add_from_source(keys, callback, message)
        else
          errors.delete_from_source(keys, callback)
        end
      end
    end
  end
end

#extract_attributes!(object = @object) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 68

def extract_attributes!(object = @object)
  attributes =
    case
      when object.respond_to?(:attributes)
        object.attributes
      when object.instance_variable_defined?('@attributes')
        object.instance_variable_get('@attributes')
      when object.is_a?(Map)
        object
      when object.respond_to?(:to_map)
        Map.new(object.to_map)
      when object.is_a?(Hash)
        Map.new(object)
      when object.respond_to?(:to_hash)
        Map.new(object.to_hash)
      else
        raise ArgumentError.new("found no attributes on #{ object.inspect }(#{ object.class.name })")
    end

  @attributes =
    case attributes
      when Map
        attributes
      when Hash
        Map.new(attributes)
      else
        raise(ArgumentError.new("#{ attributes.inspect } (#{ attributes.class })"))
    end

  @attributes
end

#forcing_validity!(boolean = true) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 294

def forcing_validity!(boolean = true)
  @forcing_validity = !!boolean
end

#forcing_validity? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dao/validations/validator.rb', line 290

def forcing_validity?
  defined?(@forcing_validity) and @forcing_validity
end

#get(key) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 160

def get(key)
  attributes.get(key_for(key))
end

#has(key) ⇒ Object Also known as: has? 



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# File 'lib/dao/validations/validator.rb', line 168

def has(key)
  attributes.has(key_for(key))
end

#key_for(*key) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 156

def key_for(*key)
  prefix + Array(key).flatten.compact
end

#pop_prefix ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 148

def pop_prefix
  stack.prefixes.pop
end

#prefix ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 152

def prefix
  stack.prefixes.flatten.compact
end

#prefixing(*prefix, &block) ⇒ Object Also known as: validating 



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# File 'lib/dao/validations/validator.rb', line 132

def prefixing(*prefix, &block)
  prefix = Array(prefix).flatten.compact
  push_prefix(prefix)
  begin
    block.call(*[prefix].slice(0, block.arity))
  ensure
    pop_prefix
  end
end

#push_prefix(prefix) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 143

def push_prefix(prefix)
  prefix = Array(prefix).flatten.compact
  stack.prefixes.push(prefix)
end

#reset ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 308

def reset
  errors.clear!
  status.update(:ok)
  forcing_validity!(false)
  validated!(false)
  self
end

#run_validations(list = validations_list) ⇒ Object Also known as: run_validations!, validate 



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# File 'lib/dao/validations/validator.rb', line 196

def run_validations(list = validations_list)
  loop do
    stack.validations.push(Map.new)

    _run_validations(errors, list)

    added = stack.validations.pop
    break if added.empty?
    list = [added]
  end

  if status.ok? and !errors.empty?
    status.source = errors
    status.update(412)
  end

  if status == 412 and status.source == errors and errors.empty?
    status.update(200)
  end

  errors
ensure
  validated!(true)
end

#set(key, val) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 164

def set(key, val)
  attributes.set(key_for(key), val)
end

#stack ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 128

def stack
  @stack ||= Map[:validations, [], :prefixes, []]
end

#valid! ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 286

def valid!
  @forcing_validity = true
end

#valid?(*args) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dao/validations/validator.rb', line 298

def valid?(*args)
  if forcing_validity?
    true
  else
    options = Map.options_for!(args)
    run_validations
    errors.empty? and status.ok?
  end
end

#validate! ⇒ Object

Raises:



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# File 'lib/dao/validations/validator.rb', line 281

def validate!
  raise Error.new("#{ object.class.name } is invalid!") unless valid?
  object
end

#validated!(boolean = true) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 277

def validated!(boolean = true)
  @validated = !!boolean
end

#validated? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dao/validations/validator.rb', line 272

def validated?
  @validated = false unless defined?(@validated)
  @validated
end

#validates(*args, &block) ⇒ Object Also known as: add 



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# File 'lib/dao/validations/validator.rb', line 100

def validates(*args, &block)
  block = args.pop if args.last.respond_to?(:call)
  block ||= NotBlank
  callback = Callback.new(options, &block)
  options = Map.options_for!(args)
  key = key_for(args)
  validations = stack.validations.last || self.validations
  validations[key] ||= Callback::Chain.new
  validations[key].add(callback)
  callback
end

#validates_each(*args, &block) ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 113

def validates_each(*args, &block)
  options = Map.options_for!(args)
  key = key_for(args)

  args.push(options)

  validates(*args) do |list|
    Array(list).each_with_index do |item, index|
      args = Dao.args_for_arity([item], block.arity)
      validates(index, &block)
    end
    true
  end
end

#validations_list ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 192

def validations_list
  validations_search_path.map{|object| object.validator.validations}.uniq
end

#validations_search_path ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 174

def validations_search_path
  @validations_search_path ||= (
    if mixin?
      list = [
        object.respond_to?(:validator) ? object : nil,
        object.class.ancestors.map{|ancestor| ancestor.respond_to?(:validator) ? ancestor : nil}
      ]
      list.flatten!
      list.compact!
      list.reverse!
      list.uniq!
      list
    else
      [self]
    end
  )
end

#validator ⇒ Object 



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# File 'lib/dao/validations/validator.rb', line 10

def validator
  self
end

#validator=(validator) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/dao/validations/validator.rb', line 14

def validator=(validator)
  raise NotImplementedError
end