Applescript isDone() integration

I have an Applescript who measure the phisical size of each pdf in the target folder an create a csv file. I need to add a check if the files are finished writing to disk before to start to measure each file. I founded this code who may help but I need someone to integrate it in my Applescript: (* isDone() Checks if a file has finished writing to disk. Parameters: File2Check: file path, alias, posix path LastFileSize: initialize with -1; seed each subsequent call with the return of the previous LastFileSize Returns: 2 item list: item 1 - true or false item 2 - the CurrentFileSize as integer++ (++ returns -1 if file does not exist) Examples: isDone("path:to:[login to view URL]", -1) --> {false, 6207} == file not done. isDone("path:to:[login to view URL]", 39402708) --> {false, -1} == file write aborted??? isDone("path:to:[login to view URL]", LastFileSize) --> {true, 564689207} == file is done. written by Jeff Case 2004 *) property StillGrowing : null property CurrentFileSize : null --property File2Check : "JData:Downloads:[login to view URL]" --property LastFileSize : -1 on run {File2Check, LastFileSize} tell application "Finder" if alias File2Check exists then else return {false, -1} end if end tell set File2Check to File2Check as Unicode text set StillOpen to isOpen(File2Check) isGrowing(File2Check, LastFileSize) if StillGrowing is false then return {true, CurrentFileSize} else return {false, CurrentFileSize} end if if StillOpen is false and StillGrowing is false then return {true, CurrentFileSize} else return {false, CurrentFileSize} end if end run on isOpen(File2Check) -- check the "open" status of the file -- thanks to captnswing for the 'lsof' command -- works on SMB transfers set ItzOpen to ((do shell script ("echo `lsof " & (quoted form of (POSIX path of (File2Check))) & " | wc -l`")) as integer) if ItzOpen = 0 then return false else return true end if end isOpen on isGrowing(File2Check, LastFileSize) -- parse the return of "ls" for the current file size - NOT the Finder -- sometimes it reports back as 0 even though some data has written -- so this waits for a valid "size" report from "ls" -- "ls" more responsive and reliable than a Finder query set CurrentFileSize to 0 repeat while CurrentFileSize is 0 set LSreturn to do shell script ("ls -l " & (quoted form of (POSIX path of alias (File2Check)))) set AppleScript's text item delimiters to " " set CurrentFileSize to (text item 4 of LSreturn) set AppleScript's text item delimiters to " " set CurrentFileSize to ((text item 1 of CurrentFileSize) as string) as integer set AppleScript's text item delimiters to "" end repeat set AppleScript's text item delimiters to "" if CurrentFileSize > LastFileSize then set StillGrowing to true else set StillGrowing to false end if end isGrowing