Class: Saviour::LifeCycle::FileUpdater

Inherits:
Object
  • Object
show all
Defined in:
lib/saviour/life_cycle.rb

Instance Method Summary collapse

Constructor Details

#initialize(current_path, file, column, connection) ⇒ FileUpdater

Returns a new instance of FileUpdater.



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# File 'lib/saviour/life_cycle.rb', line 29

def initialize(current_path, file, column, connection)
  @file = file
  @column = column
  @current_path = current_path
  @connection = connection
end

Instance Method Details

#upload ⇒ Object 



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# File 'lib/saviour/life_cycle.rb', line 36

def upload
  dup_temp_path = SecureRandom.hex

  dup_file = proc do
    Config.storage.cp @current_path, dup_temp_path

    DbHelpers.run_after_commit(@connection) do
      Config.storage.delete dup_temp_path
    end

    DbHelpers.run_after_rollback(@connection) do
      Config.storage.mv dup_temp_path, @current_path
    end
  end

  @new_path = @file.write(
    before_write: ->(path) { dup_file.call if @current_path == path }
  )

  return unless @new_path

  if @current_path && @current_path != @new_path
    DbHelpers.run_after_commit(@connection) do
      Config.storage.delete(@current_path)
    end
  end

  # Delete the newly uploaded file only if it's an update in a different path
  if @current_path.nil? || @current_path != @new_path
    DbHelpers.run_after_rollback(@connection) do
      Config.storage.delete(@new_path)
    end
  end

  [@column, @new_path]
end

#uploader ⇒ Object 



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# File 'lib/saviour/life_cycle.rb', line 73

def uploader
  @file.uploader
end