class AzureBlob::Tags

def self.from_response(response)
  document = REXML::Document.new(response)
  tags = {}
  document.elements.each("Tags/TagSet/Tag") do |tag|
    key = tag.elements["Key"].text
    value = tag.elements["Value"].text
    tags[key] = value
  end
  new(tags)
end

def headers
  return {} if @tags.empty?
  {
    "x-ms-tags":
    @tags.map do |key, value|
      %(#{key}=#{value})
    end.join("&"),
  }
end

def initialize(tags = nil)
  @tags = tags || {}
end

def to_h
  @tags
end