Class: HashValidator::Validator::ArrayValidator

Inherits:
Base
  • Object
show all
Defined in:
lib/hash_validator/validators/array_validator.rb

Instance Attribute Summary

Attributes inherited from Base

#name

Instance Method Summary collapse

Methods inherited from Base

#presence_error_message

Constructor Details

#initialize ⇒ ArrayValidator

Returns a new instance of ArrayValidator.



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# File 'lib/hash_validator/validators/array_validator.rb', line 2

def initialize
  super('__array__')  # The name of the validator, underscored as it won't usually be directly invoked (invoked through use of validator)
end

Instance Method Details

#should_validate?(rhs) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hash_validator/validators/array_validator.rb', line 6

def should_validate?(rhs)
  return false unless rhs.is_a?(Array)
  return false unless rhs.size > 0
  return false unless rhs[0] == :array

  return true
end

#validate(key, value, specification, errors) ⇒ Object 



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# File 'lib/hash_validator/validators/array_validator.rb', line 14

def validate(key, value, specification, errors)
  # the first item in specification is always ":array"
  unless specification[0] == :array
    errors[key] = "Wrong array specification. The #{:array} is expected as first item."
    return
  end

  if specification.size > 2
    errors[key] = "Wrong size of array specification. Allowed is one or two items."
    return
  end

  unless value.is_a?(Array)
    errors[key] = "#{Array} required"
    return
  end

  # second item is optional
  return if specification.size < 2

  array_spec = specification[1]
  return if array_spec.nil? # array specification is optional

  if array_spec.is_a?(Numeric)
    array_spec = { size: array_spec }
  end

  unless array_spec.is_a?(Hash)
    errors[key] = "Second item of array specification must be #{Hash} or #{Numeric}."
    return
  end

  return if array_spec.empty?

  size_spec = array_spec[:size]

  size_spec_present = case size_spec
    when String
      !object.strip.empty?
    when NilClass
      false
    when Numeric
      true
    when Array, Hash
      !object.empty?
    else
      !!object
    end

  if size_spec_present
    unless value.size == size_spec
      errors[key] = "The required size of array is #{size_spec} but is #{value.size}."
      return
    end
  end

  allowed_keys = [:size]
  wrong_keys = array_spec.keys - allowed_keys

  return if wrong_keys.size < 1

  errors[key] = "Not supported specification for array: #{wrong_keys.sort.join(", ")}."
  return
end