Class: MiniDefender::Validator

Inherits:
Object
  • Object
show all
Defined in:
lib/mini_defender/validator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(rules, data) ⇒ Validator

Returns a new instance of Validator.



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# File 'lib/mini_defender/validator.rb', line 7

def initialize(rules, data)
  @rules = rules
  @data = data.flatten_keys(keep_roots: true)
  @errors = nil
  @validated = {}
  @coerced = {}
  @expander = RulesExpander.new
  @factory = RulesFactory.new
  @array_patterns = @expander.array_patterns(rules)
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/mini_defender/validator.rb', line 5

def data
  @data
end

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/mini_defender/validator.rb', line 5

def errors
  @errors
end

#rules ⇒ Object (readonly)

Returns the value of attribute rules.



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# File 'lib/mini_defender/validator.rb', line 5

def rules
  @rules
end

Instance Method Details

#coerced ⇒ Object 



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# File 'lib/mini_defender/validator.rb', line 130

def coerced
  validate! if @errors.nil?
  @coerced_compacted = compact_expanded(@coerced)
end

#fails? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mini_defender/validator.rb', line 121

def fails?
  !passes?
end

#neighbor_values(key, level = 1) ⇒ Array

Returns:

  • (Array) 


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# File 'lib/mini_defender/validator.rb', line 142

def neighbor_values(key, level = 1)
  neighbors(key, level).values
end

#neighbors(key, level = 1) ⇒ Hash

Returns:

  • (Hash) 


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# File 'lib/mini_defender/validator.rb', line 136

def neighbors(key, level = 1)
  pattern = leveled_search_pattern(key, level)
  @data.filter { |k, _| k.match?(pattern) }
end

#passes? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mini_defender/validator.rb', line 116

def passes?
  validate if @errors.nil?
  @errors.empty?
end

#validate ⇒ Object 



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# File 'lib/mini_defender/validator.rb', line 18

def validate
  unless @errors.nil?
    return
  end

  @errors = {}

  data_rules = @rules.to_h do |k, set|
    [k, @factory.init_set(set)]
  end

  # Set default values for missing data key compared to rules
  defaults_rules = data_rules.filter { |k, set| set.any? { |r| r.defaults?(self) } }
  defaults_rules.each do |key_pattern, set|
    # If element is not inside an array
    unless key_pattern.match?(/\*/)
      if missing_value?(@data[key_pattern])
        @data[key_pattern] = set.map { |r| r.default_value(self) }.reject(&:nil?).first
      end

      next
    end

    parent, sep, child_key = key_pattern.rpartition('*')
    parent += sep

    # If parent or a sibling exists, add the default value
    pattern = Regexp.new("\\A#{parent.gsub('*', '\d')}\\z")
    additions = {}
    @data.each do |k, _|
      unless k.match?(pattern)
        next
      end

      current_child_key = "#{k}#{child_key}"

      unless missing_value?(@data[current_child_key])
        next
      end

      additions[current_child_key] = set.map { |r| r.default_value(self) }.reject(&:nil?).first
    end

    @data.merge!(additions)
  end

  data_rules = @expander.expand(data_rules, @data)
  data_rules.each do |k, rule_set|
    @errors[k] = []

    value_included = true
    required = rule_set.any? { |r| r.implicit?(self) }

    unless @data.key?(k)
      if required
        @errors[k] << 'This field is missing.'
      end

      next
    end

    value = coerced = @data[k]
    force_coerce = false

    rule_set.each do |rule|
      next unless rule.active?(self)

      value_included &= !rule.excluded?(self)

      if rule.passes?(k, coerced, self)
        coerced = rule.coerce(coerced)
        force_coerce = rule.force_coerce?
      else
        @errors[k] << rule.error_message(k, coerced, self)
      end
    end

    if force_coerce
      value = coerced
    end

    if @errors[k].empty? && value_included
      @validated[k] = value
      @coerced[k] = coerced
    end
  end

  @errors.reject! { |_, v| v.empty? }
end

#validate! ⇒ Object 



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# File 'lib/mini_defender/validator.rb', line 108

def validate!
  validate if @errors.nil?

  unless @errors.empty?
    raise ValidationError.new('Data validation failed', @errors)
  end
end

#validated ⇒ Object 



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# File 'lib/mini_defender/validator.rb', line 125

def validated
  validate! if @errors.nil?
  @validated_compacted ||= compact_expanded(@validated)
end