--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/thingfish/processor/pdf.rb	Wed Nov 16 13:11:39 2016 -0800
@@ -0,0 +1,62 @@
+# -*- ruby -*-
+#encoding: utf-8
+
+require 'pdf-reader'
+
+require 'strelka'
+require 'thingfish' unless defined?( Thingfish )
+require 'thingfish/processor' unless defined?( Thingfish::Processor )
+
+
+# Attach PDF metadata to the Adobe Portable Document Format.
+class Thingfish::Processor::PDF < Thingfish::Processor
+	extend Loggability
+
+	# Package version
+	VERSION = '0.1.0'
+
+	# Version control revision
+	REVISION = %q$Revision$
+
+
+	# Loggability API -- log to the :thingfish logger
+	log_to :thingfish
+
+	# The list of handled types
+	handled_types 'application/pdf'
+
+
+	### Synchronous processor API -- extract metadata from uploaded PDFs
+	###
+	def on_request( request )
+		reader   = ::PDF::Reader.new( request.body )
+		metadata = self.extract_pdf_metadata( reader )
+
+		request.add_metadata( metadata )
+	end
+
+
+	#########
+	protected
+	#########
+
+	### Normalize metadata from the PDFReader object and return it as a hash.
+	###
+	def extract_pdf_metadata( reader )
+		self.log.debug "Extracting PDF metadata..."
+
+		pdf_metadata = {
+			'pdf:version'   => reader.pdf_version,
+			'pdf:pagecount' => reader.page_count,
+		}.reject {|_,v| v.nil? }
+
+		reader.info.each_pair do |key, val|
+			pdf_metadata[ "pdf:#{key}" ] = val unless val.is_a?( ::PDF::Reader::Reference )
+		end
+
+		self.log.debug "  raw PDF metadata: %p" % [ pdf_metadata ]
+		return pdf_metadata
+	end
+
+end # class Thingfish::Processor::PDF
+