Class: ArchivesSpaceOAIRepository

Inherits:
OAI::Provider::Model
  • Object
show all
Defined in:
backend/app/lib/oai/aspace_oai_repository.rb

Defined Under Namespace

Classes: FormatOptions

Constant Summary collapse

DELETES_PER_PAGE = 
100
RESOLVE = 
[
  'digital_object',
  'linked_agents',
  'repository',
  'resource',
  'subjects',
  'top_container',
  'top_container::container_profile'
] + AppConfig[:record_inheritance_resolves]

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.available_record_types ⇒ Object 



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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 9

def self.available_record_types
  {
    'oai_dc' => FormatOptions.new([Resource, ArchivalObject], 25),
    'oai_dcterms' => FormatOptions.new([Resource, ArchivalObject], 25),
    'oai_marc' => FormatOptions.new([Resource, ArchivalObject], 25),
    'oai_mods' => FormatOptions.new([Resource, ArchivalObject], 25),
    'oai_ead' => FormatOptions.new([Resource], 1)
  }
end

.delete_lookups ⇒ Object

If a given record type supports deletes, we’ll need a way to look up its tombstone records. Since we only know the URIs of those tombstones, we’re pretty much stuck doing slow lookups.



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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 32

def self.delete_lookups
  {
    Resource => Tombstone.where { Sequel.like(:uri, '%/resources/%') },
    ArchivalObject => Tombstone.where { Sequel.like(:uri, '%/archival_objects/%') },
  }
end

Instance Method Details

#earliest ⇒ Object 



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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 52

def earliest
  Time.at(0).utc
end

#fetch_single_record(uri, options = {}) ⇒ Object

Raises:

  • (OAI::IdException) 


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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 108

def fetch_single_record(uri, options = {})
  tombstone = Tombstone.filter(:uri => uri).first

  unless tombstone.nil?
    return OAIDeletion.new(tombstone)
  end

  metadata_prefix = options.fetch(:metadata_prefix)

  format_options = options_for_type(metadata_prefix)
  parsed_ref = JSONModel.parse_reference(uri)

  raise OAI::IdException.new if parsed_ref.nil?

  model = format_options.record_types.find {|model| model.my_jsonmodel.record_type == parsed_ref.fetch(:type)}

  raise OAI::IdException.new unless model

  repo_uri = parsed_ref.fetch(:repository) { raise OAI::IdException.new }
  raise OAI::IdException.new if repo_uri.nil?

  repo_id = JSONModel.parse_reference(repo_uri).fetch(:id) { raise OAI::IdException.new }

  RequestContext.open(:repo_id => repo_id) do
    obj = add_visibility_restrictions(model.filter(:id => parsed_ref[:id])).first

    raise OAI::IdException.new unless obj

    ArchivesSpaceOAIRecord.new(obj, fetch_jsonmodels(model, [obj])[0])
  end
end

#find(selector, options = {}) ⇒ Object 



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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 140

def find(selector, options = {})
  if selector.is_a?(String)
    return fetch_single_record(selector, options)
  end

  resumption_token = if options.has_key?(:resumption_token)
                       ArchivesSpaceResumptionToken.parse(options.fetch(:resumption_token), ArchivesSpaceOAIRepository.available_record_types)
                     else
                       ArchivesSpaceResumptionToken.new(options, ArchivesSpaceOAIRepository.available_record_types)
                     end

  if resumption_token.state == ArchivesSpaceResumptionToken::PRODUCING_RECORDS_STATE
    records = produce_next_record_set(resumption_token, options)

    if records.is_a?(OAI::Provider::PartialResult) && records.records.empty?
      # We didn't match any records, but there might still be some deletes of interest...
      produce_next_delete_set(records.token, options)
    else
      records
    end
  elsif resumption_token.state == ArchivesSpaceResumptionToken::PRODUCING_DELETES_STATE
    produce_next_delete_set(resumption_token, options)
  else
    raise OAI::ResumptionTokenException.new
  end
end

#get_oai_config_values ⇒ Object 



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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 19

def get_oai_config_values
  @oai_config          = OAIConfig.all.first
  @repo_set_codes      = @oai_config[:repo_set_codes] ? JSON.parse(@oai_config[:repo_set_codes]) : []
  @sponsor_set_names   = @oai_config[:sponsor_set_names] ? JSON.parse(@oai_config[:sponsor_set_names]) : []
  @repo_description    = @oai_config[:repo_set_description]
  @sponsor_description = @oai_config[:sponsor_set_description]
  @repo_set_name       = @oai_config[:repo_set_name]
  @sponsor_set_name    = @oai_config[:sponsor_set_name]
end

#latest ⇒ Object 



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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 56

def latest
  Time.now.utc
end

#set_enabled?(set) ⇒ Boolean

returns true if set is enabled in at least one repository

Returns:

  • (Boolean) 


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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 92

def set_enabled?(set)
  sets_in_repos = Repository.exclude(:publish => 0)
                            .exclude(:oai_is_disabled => 1)
                            .select(:oai_sets_available)
                            .map {|r| JSON::parse(r[:oai_sets_available]) rescue [] }

  # if oai_sets_available array is blank, then all sets are enabled for that repository.
  # if a repository is restricted to certain sets, then those set_ids will be in the oai_sets_available array.
  # So, we're looking to see if there is at least one repository with an empty set OR this set_id in the oai_sets_available array.
  set_id = BackendEnumSource.id_for_value("archival_record_level", set.name).to_s

  repos_enabling_set = sets_in_repos.select {|r| r.length == 0 || r.include?(set_id)}

  return repos_enabling_set.length > 0
end

#sets ⇒ Object 



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# File 'backend/app/lib/oai/aspace_oai_repository.rb', line 60

def sets
  available_levels = BackendEnumSource.values_for("archival_record_level")
  get_oai_config_values

  # ANW-674:
  # Get set values from OAIConfig table instead of config file
  config_sets = []

  if @repo_set_codes.any? && !available_levels.include?(@repo_set_name)
    repo_oai_set = OAI::Set.new({:name => @repo_set_name,
                                 :spec => @repo_set_name,
                                 :description => build_set_description(@repo_description)})

    config_sets.push(repo_oai_set)
  end

  if @sponsor_set_names.any? && !available_levels.include?(@sponsor_set_name)
    repo_sponsor_set = OAI::Set.new({:name => @sponsor_set_name,
                                     :spec => @sponsor_set_name,
                                     :description => build_set_description(@sponsor_description)})

    config_sets.push(repo_sponsor_set)
  end

  level_sets = available_levels.map {|level|
    OAI::Set.new(:name => level, :spec => level)
  }

  config_sets + level_sets.select {|s| set_enabled?(s) }
end