class HTML::Proofer::Checkable

def absolute_path 

def absolute_path
  path = file_path || @check.path
  File.expand_path path, Dir.pwd
end

def exists?

checks if a file exists relative to the current pwd 
def exists?
  File.exist? absolute_path
end

def external?

path is external to the file 
def external?
  !internal?
end

def file_path 

def file_path
  return if path.nil?
  if path =~ /^\// #path relative to root
    base = @check.src
  elsif File.exist? File.expand_path path, @check.src #relative links, path is a file
    base = File.dirname @check.path
  else #relative link, path is a directory
    base = @check.path
  end
  file = File.join base, path
  # implicit /index.html support, with support for tailing slashes
  file = File.join path, "index.html" if File.directory? File.expand_path file, @check.src
  file
end

def hash 

def hash
  parts.fragment
end

def ignore? 

def ignore?
  uri = URI.parse url
  %w( mailto ).include?(uri.scheme) || @check.additional_href_ignores.include?(href)
rescue URI::BadURIError
  false
rescue URI::InvalidURIError
  false
end

def initialize(obj, check) 

def initialize(obj, check)
  @src = obj['src']
  @href = obj['href']
  @alt = obj['alt']
  @name = obj['name']
  @id = obj['id']
  @check = check
  if @href && @check.options[:href_swap]
    @check.options[:href_swap].each do |link, replace|
      @href = @href.gsub(link, replace)
    end
  end
end

def internal?

path is an anchor 
def internal?
  url[0] == "#"
end

def parts 

def parts
   URI.parse url
end

def path 

def path
  parts.path
end

def remote?

path is to an external server 
def remote?
  uri = URI.parse url
  %w( http https ).include?(uri.scheme)
rescue URI::BadURIError
  false
rescue URI::InvalidURIError
  false
end

def url 

def url
  @src || @href || ""
end

def valid? 

def valid?
  begin
    URI.parse url
  rescue
    false
  end
end