class Lookbook::KeyValueTagParser

def call
  text.strip.match(KEY_VALUE_REGEX) do |matches|
    key = matches[1]
    value = begin
      YAML.safe_load(matches[2] || "~")
    rescue ::Psych::SyntaxError
      raise ArgumentError, "Invalid YAML in tag text '#{@text}'"
    end
    return [key, value]
  end
  raise ArgumentError, "Could not parse key:value pair from '#{@text}'"
end

def initialize(text)
  @text = text.to_s
end