Class: ArchiveDownloadService

Inherits:
Object
  • Object
show all
Defined in:
app/services/archive_download_service.rb

Instance Method Summary collapse

Constructor Details

#initialize(model:, selection:) ⇒ ArchiveDownloadService

Returns a new instance of ArchiveDownloadService.



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# File 'app/services/archive_download_service.rb', line 2

def initialize(model:, selection:)
  @model = model
  @selection = sanitize selection
end

Instance Method Details

#filename ⇒ Object 



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# File 'app/services/archive_download_service.rb', line 7

def filename
  @filename ||= [
    sanitize(@model.slug),
    @selection
  ].compact.join("-") + ".zip"
end

#output_file ⇒ Object 



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# File 'app/services/archive_download_service.rb', line 14

def output_file
  @output_file ||= File.join(
    ModelFileUploader.find_storage(:downloads).directory,
    filename
  )
end

#prepare(delay: 0.seconds, queue: nil) ⇒ Object 



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# File 'app/services/archive_download_service.rb', line 36

def prepare(delay: 0.seconds, queue: nil)
  return if ready? || preparing?
  FileUtils.touch(temp_file)
  PrepareDownloadJob.set(wait: delay, queue: queue).perform_later(
    model_id: @model.id,
    selection: @selection
  )
end

#preparing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/services/archive_download_service.rb', line 32

def preparing?
  File.exist?(temp_file)
end

#ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/services/archive_download_service.rb', line 28

def ready?
  File.exist?(output_file)
end

#temp_file ⇒ Object 



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# File 'app/services/archive_download_service.rb', line 21

def temp_file
  @temp_file ||= File.join(
    ModelFileUploader.find_storage(:downloads).directory,
    Digest::SHA256.hexdigest(filename)
  )
end

#wait_until_ready ⇒ Object 



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# File 'app/services/archive_download_service.rb', line 45

def wait_until_ready
  loop do
    break if ready?
    sleep(1)
  end
end