pulibrary / pdc_describe / 9091a1ae-29be-458c-984a-339d213919c4

class WorkValidator

  include Rails.application.routes.url_helpers

  attr_reader :work

  delegate :errors, :metadata, :resource, :ark, :doi, :user_entered_doi, :id, :group,

           :pre_curation_uploads, :post_curation_uploads, to: :work

  def initialize(work)

    @work = work

  end

  def valid?

    if work.none?

      validate_ids

    elsif work.draft?

      valid_to_draft

    else

      valid_to_submit

    end

  end

  def valid_to_draft(*)

    errors.add(:base, "Must provide a title") if resource.main_title.blank?

    validate_ark

    validate_creators

    validate_related_objects if resource.present? && !resource.related_objects.empty?

    errors.count == 0

  end

  def valid_to_complete(*args)

    validate_files

    valid_to_submit(args)

  end

  def valid_to_submit(*args)

    valid_to_draft(args)

    validate_metadata

    if errors.count == 0

      valid_datacite? # test if the datacite update will be valid

    end

    errors.count == 0

  end

  def valid_to_approve(user)

    if resource.doi.blank?

      errors.add :base, "DOI must be present for a work to be approved"

    end

    valid_to_submit(user)

    unless user.has_role? :group_admin, group

      errors.add :base, "Unauthorized to Approve"

    end

    validate_files

    if pre_curation_uploads.empty? && post_curation_uploads.empty?

      errors.add(:base, "You must include at least one file. <a href='#{work_file_upload_path(work)}'>Please upload one</a>")

    end

    errors.count == 0

  end

  def valid_datacite?

    datacite_serialization = resource.datacite_serialization

    datacite_serialization.valid?

    datacite_serialization.errors.each { |error| errors.add(:base, error) }

    errors.count == 0

  rescue ArgumentError => error

    argument_path = error.backtrace_locations.first.path

    argument_file = argument_path.split("/").last

    argument_name = argument_file.split(".").first

    errors.add(:base, "#{argument_name.titleize}: #{error.message}")

    false

  end

  private

    def validate_ark

      return if ark.blank?

      return false unless unique_ark

      first_save = id.blank?

      changed_value = metadata["ark"] != ark

      if first_save || changed_value

        errors.add(:base, "Invalid ARK provided for the Work: #{ark}") unless Ark.valid?(ark)

      end

    end

    def validate_related_objects

      return if resource.related_objects.empty?

      invalid = resource.related_objects.reject(&:valid?)

      if invalid.count.positive?

        related_object_errors = "Related Objects are invalid: "

        prev_errors = errors.to_a

        prev_related_object_errors = prev_errors.map { |e| e.include?(related_object_errors) }.reduce(:|)

        errors.add(:base, "#{related_object_errors}#{invalid.map(&:errors).join(', ')}") unless prev_related_object_errors

      end

    end

    def validate_creators

      if resource.creators.count == 0

        errors.add(:base, "Must provide at least one Creator")

      else

        resource.creators.each do |creator|

          if creator.orcid.present? && Orcid.invalid?(creator.orcid)

            errors.add(:base, "ORCID for creator #{creator.value} is not in format 0000-0000-0000-0000")

          end

        end

      end

    end

    def validate_required_metadata

      return if metadata.blank?

      errors.add(:base, "Must provide a title") if resource.main_title.blank?

      validate_creators

    end

    def validate_doi

      return true unless user_entered_doi

      return false unless unique_doi

      if /^10.\d{4,9}\/[-._;()\/:a-z0-9\-]+$/.match?(doi.downcase)

        response = Faraday.get("#{Rails.configuration.datacite.doi_url}#{doi}")

        errors.add(:base, "Invalid DOI: can not verify it's authenticity") unless response.success? || response.status == 302

      else

        errors.add(:base, "Invalid DOI: does not match format")

      end

      errors.count == 0

    end

    def unique_ark

      return true if ark.blank?

      other_record = Work.find_by_ark(ark)

      return true if other_record == work

      errors.add(:base, "Invalid ARK: It has already been applied to another work #{other_record.id}")

      false

    rescue ActiveRecord::RecordNotFound

      true

    end

    def validate_ids

      validate_doi

      unique_ark

    end

    def unique_doi

      other_record = Work.find_by_doi(doi)

      return true if other_record == work

      errors.add(:base, "Invalid DOI: It has already been applied to another work #{other_record.id}")

      false

    rescue ActiveRecord::RecordNotFound

      true

    end

    def validate_metadata

      return if metadata.blank?

      validate_required_metadata

      errors.add(:base, "Must provide a description") if resource.description.blank?

      errors.add(:base, "Must indicate the Publisher") if resource.publisher.blank?

      errors.add(:base, "Must indicate the Publication Year") if resource.publication_year.blank?

      errors.add(:base, "Must indicate at least one Rights statement") if resource.rights_many.count == 0

      errors.add(:base, "Must provide a Version number") if resource.version_number.blank?

      validate_related_objects

    end

    def validate_files

      return if @work.resource.migrated

      readme = Readme.new(work, nil)

      errors.add(:base, "You must include a README. <a href='#{work_readme_select_path(work)}'>Please upload one</a>") if readme.blank?

      if !work.files_location_upload?

      elsif work.uploads.length < 2

        errors.add(:base,

        "You must include one or more files if you are uploading files from your local environment. <a href='#{work_file_upload_path(work)}'>Please resubmit after uploading the file(s)</a>")

      end

    end

end