Module: Eco::API::Common::ClassHelpers

Included in:
ClassHierarchy
Defined in:
lib/eco/api/common/class_helpers.rb

Instance Method Summary collapse

Instance Method Details

#class_resolver(name, klass) ⇒ Object 



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# File 'lib/eco/api/common/class_helpers.rb', line 6

def class_resolver(name, klass)
  define_singleton_method(name) { resolve_class(klass) }
  define_method(name) { self.class.resolve_class(klass) }
end

#new_class(name, inherits:, parent_space: nil) {|child_class| ... } ⇒ Class

If the class for name exists, it returns it. Otherwise it generates it.

Yields:

  • (child_class) —

    configure the new class

Yield Parameters:

  • child_class (Class) —

    the new class



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# File 'lib/eco/api/common/class_helpers.rb', line 46

def new_class(name, inherits:, parent_space: nil)
  name            = name.to_sym.freeze
  class_name      = to_constant(name)
  parent_space    = parent_space ? resolve_class(parent_space) : self
  full_class_name = "#{parent_space}::#{class_name}"

  unless target_class = resolve_class(full_class_name, exception: false)
    target_class = Class.new(inherits)
    parent_space.const_set class_name, target_class
  end

  target_class.tap do |klass|
    yield(klass) if block_given?
  end
end

#resolve_class(klass, exception: true) ⇒ Object 



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# File 'lib/eco/api/common/class_helpers.rb', line 11

def resolve_class(klass, exception: true)
  @resolved ||= {}
  @resolved[klass] ||=
    case klass
      when Class
        klass
      when String
        begin
          Kernel.const_get(klass)
        rescue NameError => e
          raise if exception
        end
      when Symbol
        resolve_class(self.send(klass))
      else
        raise "Unknown class: #{klass}" if exception
    end
end

#to_constant(key) ⇒ String

Helper to normalize key into a correct ruby constant name



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# File 'lib/eco/api/common/class_helpers.rb', line 33

def to_constant(key)
  str_name = key.to_s.strip.split(/[\-\_ ]/i).compact.map do |str|
    str.slice(0).upcase + str.slice(1..-1).downcase
  end.join("")
end