Class: Objectifier::MapValue

Inherits:
Object
  • Object
show all
Defined in:
lib/objectifier/map_value.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(scope = "", &block) ⇒ MapValue

Returns a new instance of MapValue.



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# File 'lib/objectifier/map_value.rb', line 7

def initialize(scope = "", &block)
  @scope = scope.to_s
  @rules = Hash.new
  instance_eval &block
end

Instance Attribute Details

#rules ⇒ Object (readonly)

Returns the value of attribute rules.



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# File 'lib/objectifier/map_value.rb', line 5

def rules
  @rules
end

Instance Method Details

#call(parameters) ⇒ Object

examine parameters and return a hash of massaged data or an error results



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# File 'lib/objectifier/map_value.rb', line 39

def call(parameters)

  if @scope.length > 0
    parameters = parameters.fetch(
      @scope,
      parameters.fetch(
        @scope.to_s,
        {}))
  end

  ok, errors = @rules.values.map do |rule|
    rule.call(parameters)
  end.partition do |result|
    result.success?
  end

  if errors.empty?
    values = ok.select(&:value?)

    if values.empty?
      SuccessResult.new(@scope)
    else
      ValueResult.new(
        @scope,
        Hash[values.map { |v| [ v.name, v.value ] }])
    end
  else
    errors.reduce(ErrorResult.new) { |total, err| total.merge(err) }.scope(@scope)
  end
end

#item(name, args) ⇒ Object 



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# File 'lib/objectifier/map_value.rb', line 23

def item(name, args)
  @rules[name.to_s] = ScalarValue.new(name, args)
  true
end

#items(name, args) ⇒ Object 



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# File 'lib/objectifier/map_value.rb', line 28

def items(name, args)
  @rules[name.to_s] = ArrayValue.new(name, args)
  true
end

#map(name, &block) ⇒ Object 



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# File 'lib/objectifier/map_value.rb', line 33

def map(name, &block)
  @rules[name.to_s] = MapValue.new(name, &block)
  true
end

#name ⇒ Object 



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# File 'lib/objectifier/map_value.rb', line 13

def name
  @scope
end

#required? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/objectifier/map_value.rb', line 17

def required?
  @rules.values.reduce(false) do |req, rule|
    req || rule.required?
  end
end