Class: Effective::AssetReplacer

Inherits:
Object
  • Object
show all
Includes:
ActiveStorage::Blob::Analyzable
Defined in:
app/models/effective/asset_replacer.rb

Constant Summary collapse

BATCH_SIZE = 
500
TIMEOUT = 
120

Instance Method Summary collapse

Instance Method Details

#replace!(skip_existing: false) ⇒ Object 



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# File 'app/models/effective/asset_replacer.rb', line 16

def replace!(skip_existing: false)
  verify!

  attachments = attachments_to_process().to_a

  while(true)
    wait_for_active_job!

    puts "\nEnqueuing #{attachments.length} attachments with ids #{attachments.first.id} to #{attachments.last.id}"

    attachments.each do |attachment|
      asset = attachment.asset
      attachable = attachment.attachable
      next if asset.blank? || attachable.blank?

      box = attachment.box.singularize
      boxes = attachment.box

      one = attachable.respond_to?(box) && attachable.send(box).kind_of?(ActiveStorage::Attached::One)
      many = attachable.respond_to?(boxes) && attachable.send(boxes).kind_of?(ActiveStorage::Attached::Many)
      box = (one ? box : boxes)

      if skip_existing
        existing = Array(attachable.send(box))

        if existing.any? { |obj| obj.respond_to?(:filename) && obj.filename.to_s == asset.file_name }
          puts("Skipping existing #{attachable.class.name} #{attachable.id} #{box} #{asset.file_name}.")
          next
        end
      end

      Effective::AssetReplacerJob.perform_later(attachment, box)
    end

    attachments = attachments_to_process().where.not(id: attachments.map(&:id))
    break if attachments.to_a.blank?

    GC.start
  end

  puts "\nAll Done. Have a great day."
  true
end

#replace_attachment!(attachment, box) ⇒ Object

This is called on the background by the AssetReplacerJob



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# File 'app/models/effective/asset_replacer.rb', line 61

def replace_attachment!(attachment, box)
  raise('expected an Effective::Attachment') unless attachment.kind_of?(Effective::Attachment)
  puts("Processing attachment ##{attachment.id}")

  asset = attachment.asset
  attachable = attachment.attachable

  attachable.replacing_asset = true if attachable.respond_to?(:replacing_asset=)

  Timeout.timeout(TIMEOUT) do
    attachable.send(box).attach(
      io: URI.open(asset.url),
      filename: CGI.unescape(asset.file_name.to_s),
      content_type: asset.content_type.presence,
      identify: (asset.content_type.blank?)
    )

    attachment.update_column(:replaced, true)
  end

  true
end

#reset! ⇒ Object 



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# File 'app/models/effective/asset_replacer.rb', line 123

def reset!
  Effective::Attachment.update_all(replaced: false)
end

#verify! ⇒ Object 



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# File 'app/models/effective/asset_replacer.rb', line 84

def verify!
  raise('expected effective assets') unless defined?(Effective::Asset)
  raise('expected active storage') unless defined?(ActiveStorage)

  unless Effective::Attachment.new.respond_to?(:replaced?)
    raise('please add a replaced boolean to Effective::Attachment. add_column :attachments, :replaced, :boolean')
  end

  (Effective::Attachment.all.pluck(:attachable_type, :box).uniq).each do |name, boxes|
    next if name.blank? || boxes.blank?

    box = boxes.singularize

    klass = name.safe_constantize
    raise("invalid class #{klass}") unless klass.present?

    instance = klass.new

    if instance.respond_to?(:effective_assets)
      raise("please remove acts_as_asset_box() from #{klass.name}")
    end

    unless instance.respond_to?(box) || instance.respond_to?(boxes)
      raise("expected #{klass.name} to has_one_attached :#{box} or has_many_attached :#{boxes}")
    end

    one = instance.respond_to?(box) && instance.send(box).kind_of?(ActiveStorage::Attached::One)
    many = instance.respond_to?(boxes) && instance.send(boxes).kind_of?(ActiveStorage::Attached::Many)

    unless one.present? || many.present?
      raise("expected #{klass.name} to has_one_attached :#{box} or has_many_attached :#{boxes}")
    end
  end

  puts 'All attachment classes verified.'

  true
end