class Middleman::Dependencies::Vertex

def ==(other)
  key == other.key
end

def full_path(root, file)
  File.expand_path(file, root)
end

def initialize(key, attributes)
  @key = key
  @attributes = attributes
end

def matches_resource?(_resource)
  false
end

def merge!(other)
  @attributes.merge!(other.attributes)
end

def relative_path(root, file)
  Pathname(File.expand_path(file)).relative_path_from(root).to_s
end

def serialize(attributes = {})
  {
    'key' => @key.to_s,
    'type' => type_id.to_s,
    'attrs' => @attributes.merge(attributes).stringify_keys
  }
end

def to_s
  "<Vertex type=#{type_id} key=#{key}>"
end

def type_id
  self.class.const_get :TYPE_ID
end

def valid?
  raise NotImplementedError
end