Module: Cul::Hydra::Models::Common

Extended by:
ActiveSupport::Concern
Included in:
AdministrativeSet, Concept, DcDocument, GenericAggregator, GenericObject, GenericResource, METSStructuredAggregator, Resource, ResourceAggregator
Defined in:
app/models/concerns/cul/hydra/models/common.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#cmodel_pid(klass) ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 74

def cmodel_pid(klass)
  klass.pid_namespace + ":" + klass.name.split("::")[-1]
end

#datastreams_in_fedora ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 78

def datastreams_in_fedora
  mds = {}
  self.datastreams_xml['datastream'].each do |ds|
    dsid = ds["dsid"]
    ds.merge!({:pid => self.pid, :dsID => dsid, :dsLabel => ds["label"]})
    if dsid == "RELS-EXT"
      mds.merge!({dsid => ActiveFedora::RelsExtDatastream.new(ds)})
    else
      if self.class.ds_specs.has_key? dsid
        mds.merge!({dsid => self.class.ds_specs[dsid][0].new(ds)})
      else
        mds.merge!({dsid => ActiveFedora::Datastream.new(ds)})
      end
    end
    mds[dsid].new_object = false
  end
  mds
end

#get_representative_generic_resource(force_use_of_non_pid_identifier = false) ⇒ GenericResource

Return a representative file resource for the object This method generally shouldn’t be called with any parameters (unless we’re doing testing)

Parameters:

  • force_use_of_non_pid_identifier (Boolean) (defaults to: false) —

    switch to require use of application id in struct map parsing

Returns:



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 186

def get_representative_generic_resource(force_use_of_non_pid_identifier=false)
  return self if self.is_a?(GenericResource)

  # if there's an explicit assignment of representative image, return it
  assigned_image = get_singular_rel(:schema_image)
  return ActiveFedora::Base.find(assigned_image.split('/')[-1]) if assigned_image

  return nil unless self.is_a?(Cul::Hydra::Models::Aggregator) # Only Aggregators have struct metadata
  # If we're here, then the object was not a Generic resource.
  # Try to get child info from a structMat datastream, and fall back to
  # the first :cul_member_of child if a structMap isn't present

  # Check for the presence of a structMap and get first GenericResource in that structMap
  if self.has_struct_metadata?
    begin
      struct = Cul::Hydra::Datastreams::StructMetadata.from_xml(self.datastreams['structMetadata'].content)
    rescue Rubydora::FedoraInvalidRequest => e
      Rails.logger.error "Error: Problem accessing struct datastream data in #{self.pid}" # More specific error notice
      raise e
    end
    ng_div = struct.first_ordered_content_div #Nokogiri node response
    found_struct_div = (! ng_div.nil?)
  else
    found_struct_div = false
  end

  if found_struct_div
    content_ids = ng_div.attr('CONTENTIDS').split(' ') # Get all space-delimited content ids
    child_obj = nil

    # Try to do a PID lookup first
    unless force_use_of_non_pid_identifier
      content_ids.each do |content_id|
        next unless content_id.match(/^([A-Za-z0-9]|-|\.)+:(([A-Za-z0-9])|-|\.|~|_|(%[0-9A-F]{2}))+$/) # Don't do a lookup on identifiers that can't possibly be valid PID (otherwise we'd encounter an error)
        child_obj ||= ActiveFedora::Base.exists?(content_id) ? ActiveFedora::Base.find(content_id) : nil
      end
    end

    # Then fall back to identifier lookup
    if child_obj.nil?
      child_pid = nil
      content_ids.each do |content_id|
        child_pid ||= Cul::Hydra::RisearchMembers.get_pid_for_identifier(content_id)
        if force_use_of_non_pid_identifier && child_pid && content_id == child_pid
          # This really only runs when we're doing testing, if we want to specifically ensure that we're searching by a non-pid identifier
          child_pid = nil
        end
      end

      if child_pid
        child_obj = ActiveFedora::Base.find(child_pid)
      end
    end

    if child_obj
      # Recursion!  Woo!
      return child_obj.get_representative_generic_resource(force_use_of_non_pid_identifier)
    else
      #Rails.logger.error "No object for dc:identifier in #{content_ids.inspect}"
      return nil
    end
  else
    # If there isn't a structMap, just get the first child
    member_pids = Cul::Hydra::RisearchMembers.get_direct_member_pids(self.pid, true)
    logger.warn "Warning: #{self.pid} is a member of itself!" if member_pids.include?(self.pid)
    if member_pids.first
      child_obj = ActiveFedora::Base.find(member_pids.first)
      return child_obj.get_representative_generic_resource
    else
      #Rails.logger.error "No child objects or resources for #{self.pid}"
      return nil
    end
  end
rescue ActiveFedora::ObjectNotFoundError
  logger.warn "#{get_singular_rel(:schema_image)} not found in repository for #{self.pid}"
  return nil
end

#get_singular_rel(predicate) ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 292

def get_singular_rel(predicate)
  property = relationships(predicate).first
  return nil unless property
  return (property.kind_of? RDF::Literal) ? property.value : property
end

#has_desc? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/concerns/cul/hydra/models/common.rb', line 101

def has_desc?
  has_desc = false
  begin
    has_desc = self.datastreams.include? "descMetadata"
    has_desc = has_desc and self.inner_object.datastreams["descMetadata"].content.length > 0
    has_desc = has_desc and self.datastreams["descMetadata"].term_values(:identifier).length > 0
  rescue
    has_desc = false
  end
  has_desc
end

#initialize(attrs = nil) ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 68

def initialize(attrs = nil)
  attrs = {} if attrs.nil?
  attrs[:namespace] = self.class.pid_namespace unless attrs[:namespace]
  super
end

#label=(new_label) ⇒ Object

A Fedora object label can only contain a string value of up to 255 characters. If we try to set a longer value, it causes errors upon object save. Truncate labels to 255 characters. Note: this method maps to a method_missing hanlder that converts input into a String, so we use the super method first, and then post-process the output of that super method call.



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 59

def label=(new_label)
  super(new_label)
  super(self.label[0,255])
end

#rdf_type ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 64

def rdf_type
  relationships[:rdf_type]
end

#rdf_types! ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 46

def rdf_types!
  self.class.rdf_types.each do |type|
    add_relationship(:rdf_type, type.to_s)
  end
  @metadata_is_dirty = true
  self.save
end

#route_as ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 97

def route_as
  "default"
end

#set_singular_rel(predicate, value, literal = false) ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 298

def set_singular_rel(predicate, value, literal=false)
  raise "#{predicate} is a singular property" if value.respond_to? :each
  clear_relationship(predicate)
  add_relationship(predicate, value, literal) unless value.nil? || value.empty?
end

#set_size_labels(solr_doc = {}) ⇒ Object

set the index type label and any RI-based fields



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 114

def set_size_labels(solr_doc={})
  solr_doc["index_type_label_ssi"] = [self.index_type_label]
end

#thumbnail_info ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 288

def thumbnail_info
  {:asset=>("cul_hydra/crystal/kmultiple.png"),:mime_type=>"image/png"}
end

#to_solr(solr_doc = Hash.new, opts = {}) ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 118

def to_solr(solr_doc = Hash.new, opts={})
  solr_doc = super(solr_doc, opts)

  if has_desc?
    solr_doc["descriptor_ssi"] = ["mods"]
  else
    solr_doc["descriptor_ssi"] = ["dublin core"]
  end
  # if no mods, pull some values from DC
  if (solr_doc["title_display_ssm"].nil? or solr_doc["title_display_ssm"].length == 0)
    if self.datastreams["DC"].term_values(:dc_title).first
      solr_doc["title_display_ssm"] = self.datastreams["DC"].term_values(:dc_title)
    else
      solr_doc["title_display_ssm"] = self.datastreams["DC"].term_values(:dc_identifier).reject {|dcid| dcid.eql? self.id}
    end
    solr_doc["title_si"] = self.datastreams["DC"].term_values(:dc_title).first
    if self.datastreams["DC"].term_values(:dc_relation).first
      self.datastreams["DC"].term_values(:dc_relation).each {|val|
        if val =~ /clio:/
          solr_doc["clio_ssim"] ||= []
          solr_doc["clio_ssim"] << val.split(':')[-1]
        end
      }
    end
  end
  if (solr_doc["identifier_ssim"].nil? or solr_doc["identifier_ssim"].length == 0)
      solr_doc["identifier_ssim"] = self.datastreams["DC"].term_values(:dc_identifier).reject {|dcid| dcid.eql? self.id}
  end
  if (solr_doc["title_display_ssm"].length > 1)
    solr_doc["title_display_ssm"].uniq!
  end

  if solr_doc["contributor_ssim"].present?
    if solr_doc["contributor_ssim"].is_a?(Array)
      solr_doc["contributor_first_si"] = solr_doc["contributor_ssim"].first
    else
      solr_doc["contributor_first_si"] = solr_doc["contributor_ssim"]
    end
  end


  solr_doc["format_ssi"] = [self.route_as]

  set_size_labels(solr_doc)

  solr_doc.each_pair {|key, value|
    if value.is_a? Array
      value.each {|v| v.strip! unless v.nil? }
    elsif value.is_a? String
      value.strip!
    end
  }
  solr_doc[:structured_bsi] = 'false' unless solr_doc.has_key? :structured_bsi

  representative_child = get_representative_generic_resource
  solr_doc['representative_generic_resource_pid_ssi'] = representative_child.pid unless representative_child.nil?

  # Index URI form of pid to facilitate solr joins
  solr_doc['fedora_pid_uri_ssi'] = 'info:fedora/' + self.pid if self.pid.present?
  solr_doc['datastreams_ssim'] = self.datastreams.keys.map {|k| k.to_s }.sort

  solr_doc
end

#update_datastream_attributes(params = {}, opts = {}) ⇒ Object 



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# File 'app/models/concerns/cul/hydra/models/common.rb', line 264

def update_datastream_attributes(params={}, opts={})
  logger.debug "Common.update_datastream_attributes"
  result = params.dup
  params.each_pair do |dsid, ds_params|
    if datastreams.include?(dsid)
      verify_params = ds_params.dup
      changed = false
      verify_params.each { |pointer, values|
        changed ||= value_changed?(datastreams[dsid],pointer,values)
      }
      if changed
        logger.debug "Common.update_datastream_attributes calling update_indexed_attributes"
        result[dsid] = datastreams[dsid].update_indexed_attributes(ds_params)
      else
        result[dsid] = no_update(ds_params)
      end
      logger.debug "change detected? #{changed} digital_object? #{datastreams[dsid].changed?}"
    else
      result.delete(dsid)
    end
  end
  return result
end