Search & replace PDF text or images in Swift

//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

import PDFNet
import Foundation

//-----------------------------------------------------------------------------------------
// The sample code illustrates how to use the ContentReplacer class to make using
// 'template' pdf documents easier.
//-----------------------------------------------------------------------------------------

func runContentReplacerTest() -> Int {
    return autoreleasepool {
        let input_path: String = (Bundle.main.resourcePath)! + ("/")
        let output_path: String = URL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]).appendingPathComponent("").path
        
        var ret: Int = 0
        
        
        // The following example illustrates how to replace an image in a certain region,
        // and how to change template text.
        do {
            try PTPDFNet.catchException {
                let doc: PTPDFDoc = PTPDFDoc(filepath: input_path + ("BusinessCardTemplate.pdf"))
                doc.initSecurityHandler()
                
                // first, replace the image on the first page
                let replacer: PTContentReplacer = PTContentReplacer()
                let page: PTPage = doc.getPage(1)
                let img: PTImage = PTImage.create(doc.getSDFDoc(), filename: input_path + ("peppers.jpg"))
                replacer.addImage(page.getMediaBox(), replacement_image: img.getSDFObj())
                // next, replace the text place holders on the second page
                replacer.add("NAME", replacement_text: "John Smith")
                replacer.add("QUALIFICATIONS", replacement_text: "Philosophy Doctor")
                replacer.add("JOB_TITLE", replacement_text: "Software Developer")
                replacer.add("ADDRESS_LINE1", replacement_text: "#100 123 Software Rd")
                replacer.add("ADDRESS_LINE2", replacement_text: "Vancouver, BC")
                replacer.add("PHONE_OFFICE", replacement_text: "604-730-8989")
                replacer.add("PHONE_MOBILE", replacement_text: "604-765-4321")
                replacer.add("EMAIL", replacement_text: "info@pdftron.com")
                replacer.add("WEBSITE_URL", replacement_text: "http://www.pdftron.com")
                // finally, apply
                replacer.process(page)
                
                doc.save(toFile: URL(fileURLWithPath: output_path).appendingPathComponent("BusinessCard.pdf").path, flags: 0)
            }
        } catch let e as NSError {
            print("\(e)")
            ret = 1
        }
        
        // The following example illustrates how to replace text in a given region
        do {
            try PTPDFNet.catchException {
                // Open the document that was saved in the previous code sample
                let doc: PTPDFDoc = PTPDFDoc(filepath: input_path + ("newsletter.pdf"))
                doc.initSecurityHandler()
                
                let replacer: PTContentReplacer = PTContentReplacer()
                let page: PTPage = doc.getPage(1)
                let target_region: PTPDFRect = page.getMediaBox()
                replacer.addText(target_region, replacement_text: "hello hello hello hello hello hello hello hello hello hello")
                replacer.process(page)
                
                doc.save(toFile: URL(fileURLWithPath: output_path).appendingPathComponent("ContentReplaced.pdf").path, flags: 0)
                
                print("Done.")
            }
        } catch let e as NSError {
            print("\(e)")
            ret = 1
        }
        
        return ret
    }
}