Module: Cistern::Attributes

Defined in:
lib/cistern/attributes.rb

Defined Under Namespace

Modules: ClassMethods, InstanceMethods

Constant Summary collapse

PROTECTED_METHODS = 
[:cistern, :service, :identity, :collection].freeze
TRUTHY = 
['true', '1'].freeze

Class Method Summary collapse

Class Method Details

.default_parser ⇒ Object 



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# File 'lib/cistern/attributes.rb', line 49

def self.default_parser
  @default_parser ||= ->(v, _opts) { v }
end

.parsers ⇒ Object 



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# File 'lib/cistern/attributes.rb', line 5

def self.parsers
  @parsers ||= {
    array:   ->(v, _) { [*v] },
    boolean: ->(v, _) { TRUTHY.include?(v.to_s.downcase) },
    float:   ->(v, _) { v && v.to_f },
    integer: ->(v, _) { v && v.to_i },
    string:  ->(v, opts) { (opts[:allow_nil] && v.nil?) ? v : v.to_s },
    time:    ->(v, _) { v.is_a?(Time) ? v : v && Time.parse(v.to_s) },
  }
end

.transforms ⇒ Object 



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# File 'lib/cistern/attributes.rb', line 16

def self.transforms
  @transforms ||= {
    squash: proc do |_k, _v, options|
      v      = Cistern::Hash.stringify_keys(_v)
      squash = options[:squash]

      if v.is_a?(::Hash) && squash.is_a?(Array)
        travel = lambda do |tree, path|
          if tree.is_a?(::Hash)
            travel.call(tree[path.shift], path)
          else
            tree
          end
        end

        travel.call(v, squash.dup)
      elsif v.is_a?(::Hash)
        squash_s = squash.to_s

        if v.key?(key = squash_s.to_sym)
          v[key]
        elsif v.key?(squash_s)
          v[squash_s]
        else
          v
        end
      else v
      end
    end,
    none: ->(_, v, _) { v }
  }
end