Class: DSNode::Resource

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/ds_node/resource.rb

Defined Under Namespace

Classes: UnrecognizedFileType

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#extension ⇒ Object

Returns the value of attribute extension.



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# File 'app/models/ds_node/resource.rb', line 11

def extension
  @extension
end

#mime_type ⇒ Object

Returns the value of attribute mime_type.



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# File 'app/models/ds_node/resource.rb', line 11

def mime_type
  @mime_type
end

#new_file ⇒ Object

Returns the value of attribute new_file.



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# File 'app/models/ds_node/resource.rb', line 11

def new_file
  @new_file
end

Instance Method Details

#audio? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/ds_node/resource.rb', line 53

def audio?
  media_type == "a"
end

#file=(file) ⇒ Object 



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# File 'app/models/ds_node/resource.rb', line 16

def file= file
  # normalize when file is an HttpUploadedFile
  self.original_file_name ||= actual_file_name(file)
  file = actual_file(file)

  # queue for after_save hook
  self.new_file = file

  # initial processing
  set_mime_type
  set_type
  set_extension
  set_dimensions_and_duration

  self.file = to_thumbnail_file if needs_processing? # reenter if needed
end

#file_path ⇒ Object 



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# File 'app/models/ds_node/resource.rb', line 33

def file_path
  File.join "/assets", path, file_name
end

#full_path ⇒ Object 



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# File 'app/models/ds_node/resource.rb', line 37

def full_path
  File.join "public", file_path
end

#image? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/ds_node/resource.rb', line 45

def image?
  media_type == "i"
end

#needs_processing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/ds_node/resource.rb', line 61

def needs_processing?
  false
end

#pdf? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/ds_node/resource.rb', line 57

def pdf?
  media_type == "p"
end

#preferred_format ⇒ Object 



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# File 'app/models/ds_node/resource.rb', line 65

def preferred_format
  "jpg"
end

#to_thumbnail_file ⇒ Object 



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# File 'app/models/ds_node/resource.rb', line 69

def to_thumbnail_file
  result = Tempfile.new(["result", ".#{preferred_format}"])
  if video?
    Dir.mktmpdir do |dir|
      Dir.chdir dir do
        `mplayer -nosound -ss 1 -vf screenshot -frames 1 -vo png:z=9 #{new_file.path} 2>&1`
        `convert 00000001.png -resize #{resize_geometry} 00000001.jpg 2>&1`
        `mv 00000001.jpg #{result.path} 2>&1`
      end
    end
  else
    `convert #{new_file.path}[0] -resize #{resize_geometry} #{result.path} 2>&1`
  end
  result
end

#url ⇒ Object 



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# File 'app/models/ds_node/resource.rb', line 41

def url
  file_path
end

#video? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/ds_node/resource.rb', line 49

def video?
  media_type == "v"
end