Class: Paperdragon::Task

Inherits:
Object
  • Object
show all
Defined in:
lib/paperdragon/task.rb

Overview

Gives a simple API for processing multiple versions of a single attachment.

Each processing method will return the updated metadata hash. You still have to save that hash back to the model.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attachment, upload = nil) {|_self| ... } ⇒ Task

Returns a new instance of Task.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/paperdragon/task.rb', line 7

def initialize(attachment, upload=nil)
  @attachment = attachment
  @upload     = upload
  @metadata   = attachment.metadata.dup # DISCUSS: keep this dependency?

  yield self if block_given?
end

Instance Attribute Details

#metadata ⇒ Object (readonly)

Returns the value of attribute metadata.



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# File 'lib/paperdragon/task.rb', line 15

def metadata
  @metadata
end

Instance Method Details

#delete!(*styles) ⇒ Object 



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# File 'lib/paperdragon/task.rb', line 48

def delete!(*styles)
  styles = @attachment.metadata.keys if styles.size == 0

  styles.each do |style|
    file(style).delete!
    @metadata.delete(style)
  end

  @metadata
end

#metadata_hash ⇒ Object

semi-private, might be removed.



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# File 'lib/paperdragon/task.rb', line 16

def metadata_hash # semi-private, might be removed.
  metadata.to_hash
end

#process!(style, &block) ⇒ Object

process!(style, [*args,] &block) :

version = CoverGirl::Photo.new(@model, style, *args)
metadata = version.process!(upload, &block)
merge! {style => metadata}



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# File 'lib/paperdragon/task.rb', line 24

def process!(style, &block)
  version = file(style, upload)
  new_uid = new_uid_for(style, version) # new uid when overwriting existing attachment.

  @metadata.merge!(style => version.process!(upload, new_uid, &block))
end

#rename!(style, fingerprint, &block) ⇒ Object 



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# File 'lib/paperdragon/task.rb', line 41

def rename!(style, fingerprint, &block)
  version = file(style)
  new_uid = @attachment.rebuild_uid(version, fingerprint)

  @metadata.merge!(style => version.rename!(new_uid, &block))
end

#reprocess!(style, fingerprint = nil, original = nil, &block) ⇒ Object

fingerprint optional => filename is gonna remain the same original nil => use [:original]



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# File 'lib/paperdragon/task.rb', line 33

def reprocess!(style, fingerprint=nil, original=nil, &block)
  @original ||= file(:original) # this is cached per task instance.
  version     = file(style)
  new_uid     = @attachment.rebuild_uid(version, fingerprint)

  @metadata.merge!(style => version.reprocess!(new_uid, @original, &block))
end