AppleScript Email Attachment not working in handler

Question

We have a working AppleScript that creates an email with an attachment and it works fine in the Script Editor. However, we cannot get the attachment to work in the handler used in our macOS app. Difficult to find doc and figure out the difference between activate and send commands. Thanks for any help you can provide.

Here is the AppleScript

set recipientAddress to "joe@joe.com"
set recipientName to "Joe"
set theSubject to "Estimate"
set theContent to "This is your Estimate. Please call with any questions."
set theAttachment to "/Users/iMac/Library/Containers/com.jzmobile.JZMac/Data/Documents/PDF1"

tell application "Mail"
    set outgoingMessage to make new outgoing message with properties {subject:theSubject, content:theContent, visible:true}
    tell outgoingMessage
        make new to recipient with properties {name:recipientName, address:recipientAddress}
        tell content of outgoingMessage
            make new attachment with properties {file name:theAttachment}
        end tell
    end tell
    activate
end tell

Here is the Handler:

var script: NSAppleScript = { 
        let script = NSAppleScript(source: """

    -- This is our handler definition
    on sendMyEmail(theSubject, theContent, recipientName, recipientAddress, attachment)
        tell application "Mail"

            -- Create an email
            set outgoingMessage to make new outgoing message ¬
            with properties {subject:theSubject, content:theContent, visible:true}

            -- Set the recipient
            tell outgoingMessage
                make new to recipient ¬
                with properties {name:recipientName, address:recipientAddress}
            tell content of outgoingMessage
                make new attachment with properties {file name:attachment}

            #activate
            end tell
               -- Send the message
            send 
            end tell

        end tell
        #activate

    end sendMyEmail
    """  
            )!  
        let success = script.compileAndReturnError(nil)  
        assert(success)  
        return script  
    }() 

@objc func runScript() {

    let parameters = NSAppleEventDescriptor.list()  
    parameters.insert(NSAppleEventDescriptor(string: subject), at: 0)  
    parameters.insert(NSAppleEventDescriptor(string: "Some content of the email"), at: 0)  
    parameters.insert(NSAppleEventDescriptor(string: "John Smith"), at: 0)  
    parameters.insert(NSAppleEventDescriptor(string: "john@email.com"), at: 0)  
    parameters.insert(NSAppleEventDescriptor(string: attachmentFileURL), at: 0)

    let event = NSAppleEventDescriptor(  
        eventClass: AEEventClass(kASAppleScriptSuite),  
        eventID: AEEventID(kASSubroutineEvent),  
        targetDescriptor: nil,  
        returnID: AEReturnID(kAutoGenerateReturnID),  
        transactionID: AETransactionID(kAnyTransactionID)  
    )  

    // this line sets the name of the target handler
    event.setDescriptor(NSAppleEventDescriptor(string: "sendMyEmail"), forKeyword: AEKeyword(keyASSubroutineName))

    // this line adds the parameter list we constructed above  
    event.setDescriptor(parameters, forKeyword: AEKeyword(keyDirectObject))  

    var error: NSDictionary? = nil  
    _ = self.script.executeAppleEvent(event, error: &error) as NSAppleEventDescriptor?  

    print ("runScript",self.script)

}

Answer 1

Passing a path string will not work; the sandbox will block it. You must pass a file object (alias/POSIX file).

The sandbox will also restrict your own app's ability to access arbitrary file system locations.