module ActiveFedora

  #This class represents a Fedora datastream
  class Datastream < Rubydora::Datastream
    extend Deprecation
    attr_writer :digital_object
    attr_accessor :last_modified

    def initialize(digital_object=nil, dsid=nil, options={})
      ## When you use the versions feature of rubydora (0.5.x), you need to have a 3 argument constructor
      super
    end

    def inspect
      "#<#{self.class} @pid=\"#{digital_object ? pid : nil}\" @dsid=\"#{dsid}\" @controlGroup=\"#{controlGroup}\" changed=\"#{changed?}\" @mimeType=\"#{mimeType}\" >"
    end

    #compatibility method for rails' url generators. This method will 
    #urlescape escape dots, which are apparently
    #invalid characters in a dsid.
    def to_param
      dsid.gsub(/\./, '%2e')
    end
    
    # Test whether this datastream been modified since it was last saved
    # Deprecated
    def dirty?
      changed?
    end
    deprecation_deprecate :dirty?
    
    # @abstract Override this in your concrete datastream class. 
    # @return [boolean] does this datastream contain metadata (not file data)
    def metadata?
      false
    end
    
    # Deprecated
    def dirty
      changed?
    end
    deprecation_deprecate :dirty
    
    # Deprecated
    def dirty=(value)
      if value
        content_will_change! # an innocent hack to pretend something has changed
      else
        changed_attributes.clear
      end
    end
    deprecation_deprecate :dirty=

    def new_object?
      new?
    end
    deprecation_deprecate :new_object?

    def validate_content_present
      has_content?
    end
    
    def save
      super
      self
    end

    def create
      super
      self
    end

    # serializes any changed data into the content field
    def serialize!
    end
    # Populate a Datastream object based on the "datastream" node from a FOXML file
    # @param [ActiveFedora::Datastream] tmpl the Datastream object that you are building
    # @param [Nokogiri::XML::Node] node the "foxml:datastream" node from a FOXML file
    def self.from_xml(tmpl, node)
      Deprecation.deprecated_method_warning(self, :from_xml)
      tmpl.controlGroup= node['CONTROL_GROUP']
      tmpl
    end
    
    def solrize_profile # :nodoc:
      profile_hash = {}
      profile.each_pair do |property,value|
        if property =~ /Date/
          value = Time.parse(value) unless value.is_a?(Time)
          value = value.xmlschema
        end
        profile_hash[property] = value
      end
      profile_hash
    end
    
    def profile_from_hash(profile_hash)
      profile_hash.each_pair do |key,value|
        profile[key] = value.to_s
      end
    end
    
    def to_solr(solr_doc = Hash.new)
      solr_doc
    end
  end
  
  class DatastreamConcurrencyException < Exception # :nodoc:
  end
end