Applescript or workflow to extract text from PDF and rename PDF with the results

Question

Hi Everyone,
I get supplied hundreds of PDFs which each contain a stock code, but the PDFs themselves are not named consistantly, or they are supplied as multi-page PDFs.
What I need to do is name each PDF with the code which is in the text on the PDF.
It would work like this in an ideal world:
1. Split PDF into single pages
2. Extract text from PDF
3. Rename PDF using the extracted text
I'm struggling with part 3!
I can get a textfile with just the code (using a call to BBEDIT I'm extracting the code)
I did think about using a variable for the name, but the rename functions doesn't let me use variables.

Answer 1

Hello
You may also try the following applescript script, which is a wrapper of rubycocoa script. It will ask you choose source pdf files and destination directory. Then it will scan text of each page of pdf files for the predefined pattern and save the page as new pdf file with the name as extracted by the pattern in the destination directory. Those pages which do not contain string matching the pattern are ignored. (Ignored pages, if any, are reported in the result of script.)
Currently the regex pattern is set to:
/HB-.._[0-9]{6}/
which means HB- followed by two characters and _ and 6 digits.
Minimally tested under 10.6.8.
Hope this may help,
H
_main()
on _main()
    script o
        property aa : choose file with prompt ("Choose pdf files.") of type {"com.adobe.pdf"} ¬
            default location (path to desktop) with multiple selections allowed
        set my aa's beginning to choose folder with prompt ("Choose destination folder.") ¬
            default location (path to desktop)
        set args to ""
        repeat with a in my aa
            set args to args & a's POSIX path's quoted form & space
        end repeat
        considering numeric strings
            if (system info)'s system version < "10.9" then
                set ruby to "/usr/bin/ruby"
            else
                set ruby to "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby"
            end if
        end considering
        do shell script ruby & " <<'EOF' - " & args & "
require 'osx/cocoa'
include OSX
require_framework 'PDFKit'
outdir = ARGV.shift.chomp('/')
ARGV.select {|f| f =~ /\\.pdf$/i }.each do |f|
    url = NSURL.fileURLWithPath(f)
    doc = PDFDocument.alloc.initWithURL(url)
    path = doc.documentURL.path
    pcnt = doc.pageCount
    (0 .. (pcnt - 1)).each do |i|
        page = doc.pageAtIndex(i)
        page.string.to_s =~ /HB-.._[0-9]{6}/
        name = $&
        unless name
            puts \"no matching string in page #{i + 1} of #{path}\"
            next # ignore this page
        end
        doc1 = PDFDocument.alloc.initWithData(page.dataRepresentation) # doc for this page
        unless doc1.writeToFile(\"#{outdir}/#{name}.pdf\")
            puts \"failed to save page #{i + 1} of #{path}\"
        end
    end
end
EOF"
    end script
    tell o to run
end _main