Class: Bulkrax::ApplicationParser Abstract

Inherits:
Object
  • Object
show all
Defined in:
app/parsers/bulkrax/application_parser.rb

Overview

This class is abstract.

Subclass the Bulkrax::ApplicationParser to create a parser that handles a specific format (e.g. CSV, Bagit, XML, etc).

An abstract class that establishes the API for Bulkrax’s import and export parsing.

Direct Known Subclasses

CsvParser, OaiDcParser, XmlParser

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(importerexporter) ⇒ ApplicationParser

Returns a new instance of ApplicationParser.



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# File 'app/parsers/bulkrax/application_parser.rb', line 37

def initialize(importerexporter)
  @importerexporter = importerexporter
  @headers = []
end

Instance Attribute Details

#headers ⇒ Object

rubocop:disable Metrics/ClassLength



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# File 'app/parsers/bulkrax/application_parser.rb', line 8

def headers
  @headers
end

#importerexporter ⇒ Object Also known as: importer, exporter

rubocop:disable Metrics/ClassLength



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# File 'app/parsers/bulkrax/application_parser.rb', line 8

def importerexporter
  @importerexporter
end

Class Method Details

.export_supported? ⇒ TrueClass, FalseClass

TODO:

Convert to ‘class_attribute :export_supported, default: false, instance_predicate: true` and `self << class; alias export_supported? export_supported; end`

Returns this parser does or does not support exports.

Returns:

  • (TrueClass, FalseClass) —

    this parser does or does not support exports.



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# File 'app/parsers/bulkrax/application_parser.rb', line 26

def self.export_supported?
  false
end

.import_supported? ⇒ TrueClass, FalseClass

TODO:

Convert to ‘class_attribute :import_supported, default: false, instance_predicate: true` and `self << class; alias import_supported? import_supported; end`

Returns this parser does or does not support imports.

Returns:

  • (TrueClass, FalseClass) —

    this parser does or does not support imports.



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# File 'app/parsers/bulkrax/application_parser.rb', line 33

def self.import_supported?
  true
end

.parser_fields ⇒ Object

TODO:

Convert to ‘class_attribute :parser_fiels, default: {}`



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# File 'app/parsers/bulkrax/application_parser.rb', line 19

def self.parser_fields
  {}
end

Instance Method Details

#base_path(type = 'import') ⇒ String

Base path for imported and exported files

Parameters:

  • (String)

Returns:

  • (String) —

    the base path for files that this parser will “parse”



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# File 'app/parsers/bulkrax/application_parser.rb', line 291

def base_path(type = 'import')
  # account for multiple versions of hyku
  is_multitenant = ENV['HYKU_MULTITENANT'] == 'true' || ENV['SETTINGS__MULTITENANCY__ENABLED'] == 'true'
  is_multitenant ? File.join(Bulkrax.send("#{type}_path"), ::Site.instance..name) : Bulkrax.send("#{type}_path")
end

#calculate_type_delay(type) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 237

def calculate_type_delay(type)
  return 2.minutes if type == 'file_set'
  return 1.minute if type == 'work'
  return 0
end

#collection_entry_class ⇒ Object

This method is abstract.

Subclass and override #collection_entry_class to implement behavior for the parser.

Raises:

  • (NotImplementedError) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 54

def collection_entry_class
  raise NotImplementedError, 'must be defined'
end

#collections_total ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 417

def collections_total
  0
end

#create_collections ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 162

def create_collections
  create_objects(['collection'])
end

#create_entry_and_job(current_record, type, identifier = nil) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 257

def create_entry_and_job(current_record, type, identifier = nil)
  identifier ||= current_record[source_identifier]
  new_entry = find_or_create_entry(send("#{type}_entry_class"),
                                   identifier,
                                   'Bulkrax::Importer',
                                   record_raw_metadata(current_record))
  new_entry.status_info('Pending', importer.current_run)
  if record_deleted?(current_record)
    "Bulkrax::Delete#{type.camelize}Job".constantize.send(perform_method, new_entry, current_run)
  elsif record_remove_and_rerun?(current_record) || remove_and_rerun
    delay = calculate_type_delay(type)
    "Bulkrax::DeleteAndImport#{type.camelize}Job".constantize.set(wait: delay).send(perform_method, new_entry, current_run)
  else
    "Bulkrax::Import#{type.camelize}Job".constantize.send(perform_method, new_entry.id, current_run.id)
  end
end

#create_file_sets ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 170

def create_file_sets
  create_objects(['file_set'])
end

#create_objects(types_array = nil) ⇒ Object

Parameters:

  • types (Array<Symbol>) —

    the types of objects that we’ll create.

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 187

def create_objects(types_array = nil)
  index = 0
  (types_array || %w[collection work file_set relationship]).each do |type|
    if type.eql?('relationship')
      ScheduleRelationshipsJob.set(wait: 5.minutes).perform_later(importer_id: importerexporter.id)
      next
    end
    send(type.pluralize).each do |current_record|
      next unless record_has_source_identifier(current_record, index)
      break if limit_reached?(limit, index)
      seen[current_record[source_identifier]] = true
      create_entry_and_job(current_record, type)
      increment_counters(index, "#{type}": true)
      index += 1
    end
    importer.record_status
  end
  true
rescue StandardError => e
  set_status_info(e)
end

#create_relationships ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 174

def create_relationships
  create_objects(['relationship'])
end

#create_works ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 166

def create_works
  create_objects(['work'])
end

#entry_class ⇒ Object

This method is abstract.

Subclass and override #entry_class to implement behavior for the parser.

Raises:

  • (NotImplementedError) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 44

def entry_class
  raise NotImplementedError, 'must be defined'
end

#exporter? ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 322

def exporter?
  importerexporter.is_a?(Bulkrax::Exporter)
end

#file_set_entry_class ⇒ Object

This method is abstract.

Subclass and override #file_set_entry_class to implement behavior for the parser.

Raises:

  • (NotImplementedError) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 60

def file_set_entry_class
  raise NotImplementedError, 'must be defined'
end

#file_sets_total ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 421

def file_sets_total
  0
end

#find_or_create_entry(entryclass, identifier, type, raw_metadata = nil) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 386

def find_or_create_entry(entryclass, identifier, type, raw_metadata = nil)
  # limit entry search to just this importer or exporter. Don't go moving them
  entry = importerexporter.entries.where(
    identifier: identifier
  ).first
  entry ||= entryclass.new(
    importerexporter_id: importerexporter.id,
    importerexporter_type: type,
    identifier: identifier
  )
  entry.raw_metadata = raw_metadata
  # Setting parsed_metadata specifically for the id so we can find the object via the
  # id in a delete.  This is likely to get clobbered in a regular import, which is fine.
  entry.parsed_metadata = { id: raw_metadata['id'] } if raw_metadata&.key?('id')
  entry.save!
  entry
end

#generated_metadata_mapping ⇒ String

Returns:

  • (String) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 94

def generated_metadata_mapping
  @generated_metadata_mapping ||= 'generated'
end

#get_field_mapping_hash_for(key) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Raises:

  • (StandardError) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 123

def get_field_mapping_hash_for(key)
  return instance_variable_get("@#{key}_hash") if instance_variable_get("@#{key}_hash").present?

  mapping = importerexporter.field_mapping.is_a?(Hash) ? importerexporter.field_mapping : {}
  instance_variable_set(
    "@#{key}_hash",
    mapping&.with_indifferent_access&.select { |_, h| h.key?(key) }
  )
  raise StandardError, "more than one #{key} declared: #{instance_variable_get("@#{key}_hash").keys.join(', ')}" if instance_variable_get("@#{key}_hash").length > 1

  instance_variable_get("@#{key}_hash")
end

#import_file_path ⇒ String

Path for the import

Returns:

  • (String) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 466

def import_file_path
  @import_file_path ||= real_import_file_path
end

#importer? ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 317

def importer?
  importerexporter.is_a?(Bulkrax::Importer)
end

#invalid_record(message) ⇒ Object

rubocop:disable Rails/SkipsModelValidations



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# File 'app/parsers/bulkrax/application_parser.rb', line 355

def invalid_record(message)
  current_run.invalid_records ||= ""
  current_run.invalid_records += message
  current_run.save
  ImporterRun.increment_counter(:failed_records, current_run.id)
  ImporterRun.decrement_counter(:enqueued_records, current_run.id) unless ImporterRun.find(current_run.id).enqueued_records <= 0 # rubocop:disable Style/IdenticalConditionalBranches
end

#limit_reached?(limit, index) ⇒ TrueClass, FalseClass

Parameters:

  • limit (Integer) —

    limit set on the importerexporter

  • index (Integer) —

    index of current iteration

Returns:

  • (TrueClass, FalseClass) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 329

def limit_reached?(limit, index)
  return false if limit.nil? || limit.zero? # no limit
  index >= limit
end

#model_field_mappings ⇒ Array<String>

Returns:

  • (Array<String>) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 137

def model_field_mappings
  model_mappings = Bulkrax.field_mappings[self.class.to_s]&.dig('model', :from) || []
  model_mappings |= ['model']

  model_mappings
end

#new_entry(entryclass, type) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 379

def new_entry(entryclass, type)
  entryclass.new(
    importerexporter_id: importerexporter.id,
    importerexporter_type: type
  )
end

#path_for_import ⇒ String

Path where we’ll store the import metadata and files

this is used for uploaded and cloud files

Returns:

  • (String) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 300

def path_for_import
  @path_for_import = File.join(base_path, importerexporter.path_string)
  FileUtils.mkdir_p(@path_for_import) unless File.exist?(@path_for_import)
  @path_for_import
end

#perform_method ⇒ String

Returns:

  • (String) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 145

def perform_method
  if self.validate_only
    'perform_now'
  else
    'perform_later'
  end
end

#rebuild_entries(types_array = nil) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 209

def rebuild_entries(types_array = nil)
  index = 0
  (types_array || %w[collection work file_set relationship]).each do |type|
    # works are not gurneteed to have Work in the type

    importer.entries.where(rebuild_entry_query(type, parser_fields['entry_statuses'])).find_each do |e|
      seen[e.identifier] = true
      e.status_info('Pending', importer.current_run)
      if remove_and_rerun
        delay = calculate_type_delay(type)
        "Bulkrax::DeleteAndImport#{type.camelize}Job".constantize.set(wait: delay).send(perform_method, e, current_run)
      else
        "Bulkrax::Import#{type.camelize}Job".constantize.send(perform_method, e.id, current_run.id)
      end
      increment_counters(index)
      index += 1
    end
  end
end

#rebuild_entry_query(type, statuses) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 229

def rebuild_entry_query(type, statuses)
  type_col = Bulkrax::Entry.arel_table['type']
  status_col = Bulkrax::Entry.arel_table['status_message']

  query = (type == 'work' ? type_col.does_not_match_all(%w[collection file_set]) : type_col.matches(type.camelize))
  query.and(status_col.in(statuses))
end

#record(identifier, _opts = {}) ⇒ Object

TODO:

  • review this method - is it ever used?



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# File 'app/parsers/bulkrax/application_parser.rb', line 405

def record(identifier, _opts = {})
  return @record if @record

  @record = entry_class.new(self, identifier)
  @record.build
  return @record
end

#record_deleted?(record) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 247

def record_deleted?(record)
  return false unless record.key?(:delete)
  ActiveModel::Type::Boolean.new.cast(record[:delete])
end

#record_has_source_identifier(record, index) ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 341

def record_has_source_identifier(record, index)
  if record[source_identifier].blank?
    if Bulkrax.fill_in_blank_source_identifiers.present?
      record[source_identifier] = Bulkrax.fill_in_blank_source_identifiers.call(self, index)
    else
      invalid_record("Missing #{source_identifier} for #{record.to_h}\n")
      false
    end
  else
    true
  end
end

#record_raw_metadata(record) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 243

def record_raw_metadata(record)
  record.to_h
end

#record_remove_and_rerun?(record) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 252

def record_remove_and_rerun?(record)
  return false unless record.key?(:remove_and_rerun)
  ActiveModel::Type::Boolean.new.cast(record[:remove_and_rerun])
end

#records(_opts = {}) ⇒ Object

This method is abstract.

Subclass and override #records to implement behavior for the parser.

Raises:

  • (NotImplementedError) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 66

def records(_opts = {})
  raise NotImplementedError, 'must be defined'
end

#related_children_parsed_mapping ⇒ String

Returns:

  • (String)

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 118

def related_children_parsed_mapping
  @related_children_parsed_mapping ||= get_field_mapping_hash_for('related_children_field_mapping')&.keys&.first || 'children'
end

#related_children_raw_mapping ⇒ String, NilClass

Returns:

  • (String, NilClass)

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 112

def related_children_raw_mapping
  @related_children_raw_mapping ||= get_field_mapping_hash_for('related_children_field_mapping')&.values&.first&.[]('from')&.first
end

#related_parents_parsed_mapping ⇒ String

Returns:

  • (String)

See Also:

  • #related_parents_field_mapping


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# File 'app/parsers/bulkrax/application_parser.rb', line 106

def related_parents_parsed_mapping
  @related_parents_parsed_mapping ||= get_field_mapping_hash_for('related_parents_field_mapping')&.keys&.first || 'parents'
end

#related_parents_raw_mapping ⇒ String, NilClass

Returns:

  • (String, NilClass)

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 100

def related_parents_raw_mapping
  @related_parents_raw_mapping ||= get_field_mapping_hash_for('related_parents_field_mapping')&.values&.first&.[]('from')&.first
end

#required_elements ⇒ Array<String>

Returns:

  • (Array<String>) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 365

def required_elements
  matched_elements = ((importerexporter.mapping.keys || []) & (Bulkrax.required_elements || []))
  unless matched_elements.count == Bulkrax.required_elements.count
    missing_elements = Bulkrax.required_elements - matched_elements
    error_alert = "Missing mapping for at least one required element, missing mappings are: #{missing_elements.join(', ')}"
    raise StandardError, error_alert
  end
  if Bulkrax.fill_in_blank_source_identifiers
    Bulkrax.required_elements
  else
    Bulkrax.required_elements + [source_identifier]
  end
end

#retrieve_cloud_files(_files, _importer) ⇒ Object

Optional, define if using browse everything for file upload



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# File 'app/parsers/bulkrax/application_parser.rb', line 275

def retrieve_cloud_files(_files, _importer); end

#setup_export_file ⇒ Object

This method is abstract.

Subclass and override #setup_export_file to implement behavior for the parser.

Raises:

  • (NotImplementedError) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 307

def setup_export_file
  raise NotImplementedError, 'must be defined' if exporter?
end

#source_identifier ⇒ Symbol

importing (e.g. is not this application that mounts this Bulkrax engine).

Returns:

  • (Symbol) —

    the name of the identifying property in the source system from which we’re

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 75

def source_identifier
  @source_identifier ||= get_field_mapping_hash_for('source_identifier')&.values&.first&.[]('from')&.first&.to_sym || :source_identifier
end

#total ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 413

def total
  0
end

#untar(file_to_untar) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 442

def untar(file_to_untar)
  Dir.mkdir(importer_unzip_path) unless File.directory?(importer_unzip_path)
  command = "tar -xzf #{Shellwords.escape(file_to_untar)} -C #{Shellwords.escape(importer_unzip_path)}"
  result = system(command)
  raise "Failed to extract #{file_to_untar}" unless result
end

#unzip(file_to_unzip) ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 430

def unzip(file_to_unzip)
  return untar(file_to_unzip) if file_to_unzip.end_with?('.tar.gz')

  Zip::File.open(file_to_unzip) do |zip_file|
    zip_file.each do |entry|
      entry_path = File.join(importer_unzip_path, entry.name)
      FileUtils.mkdir_p(File.dirname(entry_path))
      zip_file.extract(entry, entry_path) unless File.exist?(entry_path)
    end
  end
end

#valid_import? ⇒ TrueClass, FalseClass

Override to add specific validations

Returns:

  • (TrueClass, FalseClass) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 336

def valid_import?
  true
end

#visibility ⇒ String

The visibility of the record. Acceptable values are: “open”, “embaro”, “lease”, “authenticated”, “restricted”. The default is “open”

Returns:

  • (String)

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 158

def visibility
  @visibility ||= self.parser_fields['visibility'] || 'open'
end

#work_entry_class ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 48

def work_entry_class
  entry_class
end

#work_identifier ⇒ Symbol

Returns the name of the identifying property for the system which we’re importing into (e.g. the application that mounts this Bulkrax engine).

Returns:

  • (Symbol) —

    the name of the identifying property for the system which we’re importing into (e.g. the application that mounts this Bulkrax engine)

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 82

def work_identifier
  @work_identifier ||= get_field_mapping_hash_for('source_identifier')&.keys&.first&.to_sym || :source
end

#work_identifier_search_field ⇒ Symbol

Returns the solr property of the source_identifier. Used for searching. defaults to work_identifier value + “_sim”.

Returns:

  • (Symbol) —

    the solr property of the source_identifier. Used for searching. defaults to work_identifier value + “_sim”

See Also:



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# File 'app/parsers/bulkrax/application_parser.rb', line 89

def work_identifier_search_field
  @work_identifier_search_field ||= Array.wrap(get_field_mapping_hash_for('source_identifier')&.values&.first&.[]('search_field'))&.first&.to_s || "#{work_identifier}_sim"
end

#write ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 425

def write
  write_files
  zip
end

#write_files ⇒ Object

This method is abstract.

Subclass and override #write_files to implement behavior for the parser.

Raises:

  • (NotImplementedError) 


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# File 'app/parsers/bulkrax/application_parser.rb', line 312

def write_files
  raise NotImplementedError, 'must be defined' if exporter?
end

#write_import_file(file) ⇒ Object

Parameters:

  • file (#path, #original_filename) —

    the file object that with the relevant data for the import.



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# File 'app/parsers/bulkrax/application_parser.rb', line 279

def write_import_file(file)
  path = File.join(path_for_import, file.original_filename)
  FileUtils.mv(
    file.path,
    path
  )
  path
end

#zip ⇒ Object 



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# File 'app/parsers/bulkrax/application_parser.rb', line 449

def zip
  FileUtils.mkdir_p(exporter_export_zip_path)

  Dir["#{exporter_export_path}/**"].each do |folder|
    zip_path = "#{exporter_export_zip_path.split('/').last}_#{folder.split('/').last}.zip"
    FileUtils.rm_rf("#{exporter_export_zip_path}/#{zip_path}")

    Zip::File.open(File.join("#{exporter_export_zip_path}/#{zip_path}"), create: true) do |zip_file|
      Dir["#{folder}/**/**"].each do |file|
        zip_file.add(file.sub("#{folder}/", ''), file)
      end
    end
  end
end