Class: HaveAPI::ValidatorChain

Inherits:
Object
  • Object
show all
Defined in:
lib/haveapi/validator_chain.rb

Overview

A chain of validators for one input parameter.

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ ValidatorChain

Returns a new instance of ValidatorChain.



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# File 'lib/haveapi/validator_chain.rb', line 4

def initialize(args)
  @validators = []
  @required = false

  find_validators(args) do |validator|
    obj = validator.use(args)
    next unless obj.useful?

    @required = true if obj.is_a?(Validators::Presence)
    @validators << obj
  end
end

Instance Method Details

#add_or_replace(name, opt) ⇒ Object

Adds validator that takes option name with configuration in opt. If such validator already exists, it is reconfigured with newly provided opt.

If opt is nil, the validator is removed.



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# File 'lib/haveapi/validator_chain.rb', line 22

def add_or_replace(name, opt)
  args = { name => opt }

  unless (v_class = find_validator(args))
    raise "validator for '#{name}' not found"
  end

  exists = @validators.detect { |v| v.is_a?(v_class) }
  obj = exists

  if exists
    if opt.nil?
      @validators.delete(exists)

    else
      exists.reconfigure(name, opt)
      @validators.delete(exists) unless exists.useful?
    end

  else
    obj = v_class.use(args)
    @validators << obj if obj.useful?
  end

  return unless v_class == Validators::Presence

  @required = !opt.nil? && obj.useful?
end

#describe ⇒ Object 



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# File 'lib/haveapi/validator_chain.rb', line 56

def describe
  ret = {}
  @validators.each do |v|
    ret[v.class.name] = v.describe
  end

  ret
end

#required? ⇒ Boolean

Returns true if validator Validators::Presence is used.

Returns:



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# File 'lib/haveapi/validator_chain.rb', line 52

def required?
  @required
end

#validate(value, params) ⇒ Object

Validate value using all configured validators. It returns either true if the value passed all validators or an array of errors.



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# File 'lib/haveapi/validator_chain.rb', line 68

def validate(value, params)
  ret = []

  @validators.each do |validator|
    next if validator.validate(value, params)

    ret << format(validator.message, value:)
  end

  ret.empty? ? true : ret
end