Sonny Software

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-- Script to change the metadata title and authors based on selected reference in Bookends
-- Will overwrite a PDF so use at your own risk

-- Note - requires ExifTool to be installed in /usr/local/bin
-- Note - requires a Bookends format to be created called 'path' with only the symbol 'm' in the 'field order' field

-- Created by Kyle Eggleton 2017-04-22

-- Get reference details

tell application "Bookends"
	set theID to «event ToySRUID» "Selection"
	set theAuthor to «event ToySRFLD» theID given string:"authors"
	set theTitle to «event ToySRFLD» theID given string:"title"
	set theFile to «event ToySGUID» theID given «class RRTF»:"false", string:"path"
end tell

-- Unencode the URL encoded string returned from Bookends

set theUnencodedPath to do shell script "encoded_string=" & theFile & "
printf -v encoded_string \"%b\" \"${encoded_string//\\%/\\x}\"
echo $encoded_string"
set AppleScript's text item delimiters to {"file://"}
set thePath to text item 2 of theUnencodedPath

-- Set the metadata fields

do shell script "/usr/local/bin/exiftool -title=" & quoted form of theTitle & " -author=" & quoted form of theAuthor & " -overwrite_original " & quoted form of thePath