Class: Bulldog::Attachment::Base

Inherits:
Maybe
  • Object
show all
Defined in:
lib/bulldog/attachment/base.rb

Direct Known Subclasses

Image, Pdf, Unknown, Video

Instance Attribute Summary

Attributes inherited from Maybe

#name, #record, #saved, #stream, #value

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Maybe

#==, #copy_for, handle, #interpolate_path, #interpolate_url, #load, #read_storable_attributes, #reflection, #reload, #saved?, #type

Constructor Details

#initialize(record, name, stream) ⇒ Base

Returns a new instance of Base.



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# File 'lib/bulldog/attachment/base.rb', line 13

def initialize(record, name, stream)
  super
  @examination_result = nil
end

Class Method Details

.try(record, name, stream) ⇒ Object

Return an instance of the record if the stream is valid, nil otherwise.



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# File 'lib/bulldog/attachment/base.rb', line 8

def self.try(record, name, stream)
  attachment = new(record, name, stream)
  attachment.send(:examine) ? attachment : nil
end

Instance Method Details

#content_type ⇒ Object

Return the content type of the data.



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# File 'lib/bulldog/attachment/base.rb', line 80

def content_type
  @content_type ||= stream.content_type
end

#destroy ⇒ Object

Called when the attachment is destroyed, or just before another attachment is saved in its place.



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# File 'lib/bulldog/attachment/base.rb', line 98

def destroy
  delete_files_and_empty_parent_directories
end

#examine ⇒ Object

Ensure the file examination has been run, and return the result.



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# File 'lib/bulldog/attachment/base.rb', line 113

def examine
  if @examination_result.nil?
    @examination_result = run_examination
  else
    @examination_result
  end
end

#file_name ⇒ Object

Return the original file name of the attached file.



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# File 'lib/bulldog/attachment/base.rb', line 73

def file_name
  @file_name ||= stream.file_name
end

#file_size ⇒ Object

Return the size of the attached file.



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# File 'lib/bulldog/attachment/base.rb', line 66

def file_size
  stream.size
end

#path(style_name = reflection.default_style) ⇒ Object

Return the path on the file system where the given style’s image is to be stored.



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# File 'lib/bulldog/attachment/base.rb', line 52

def path(style_name = reflection.default_style)
  interpolate_path(style_name)
end

#process(event_name, options = {}) ⇒ Object

Run the processors for the named event.

Return true if no errors were encountered, false otherwise.



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# File 'lib/bulldog/attachment/base.rb', line 23

def process(event_name, options={})
  reflection.events[event_name].each do |event|
    if (types = event.attachment_types)
      next unless types.include?(type)
    end
    processor_type = event.processor_type || default_processor_type
    processor_class = Processor.const_get(processor_type.to_s.camelize)
    processor = processor_class.new(self, options[:input] || stream.path)
    styles = reflection.styles
    names = options[:styles] || event.styles and
      styles = reflection.styles.slice(*names)
    processor.process(styles, options, &event.callback)
  end
  record.errors.empty?
end

#process!(event_name, options = {}, &block) ⇒ Object

Like #process, but raise ActiveRecord::RecordInvalid if there are any errors.



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# File 'lib/bulldog/attachment/base.rb', line 43

def process!(event_name, options={}, &block)
  process(event_name, options, &block) or
    raise ActiveRecord::RecordInvalid, record
end

#save ⇒ Object

Called when the attachment is saved.



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# File 'lib/bulldog/attachment/base.rb', line 87

def save
  return if saved?
  self.saved = true
  original_path = interpolate_path(:original)
  stream.write_to(original_path)
end

#unload ⇒ Object 



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# File 'lib/bulldog/attachment/base.rb', line 121

def unload
  super
  @examination_result = nil
end

#url(style_name = reflection.default_style) ⇒ Object

Return the URL where the given style’s image is to be found.



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# File 'lib/bulldog/attachment/base.rb', line 59

def url(style_name = reflection.default_style)
  interpolate_url(style_name)
end