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module TaliaCore
module DataTypes
# Class to manage PDF data type
class PdfData < FileRecord
# return the mime_type for a file
def extract_mime_type(location)
'application/pdf'
end
# Create the PDF data from a PDF writer. This method needs a block
# which will be called with the writer object
def create_from_writer(writer_opts = {})
activate_pdf
writer = PDF::Writer.new(writer_opts) do |pdf|
yield(pdf)
end
filename = File.join(Dir.tmpdir, "#{rand 10E16}.pdf")
writer.save_as(filename)
self.create_from_file('', filename, true) # set to delete tempfile on create
self
end
private
# Little helper method - no need to load the pdf classes unless needed,
# but if called every time round it will slow things down (in Rails it will).
def self.activate_pdf
return if(@pdf_active)
require 'pdf/writer'
@pdf_active = true
end
def activate_pdf
self.class.activate_pdf
end
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems