// Copyright (C) 2003-2026, Foxit Software Inc..
// All Rights Reserved.
//
// http://www.foxitsoftware.com
//
// The following code is copyrighted and contains proprietary information and trade secrets of Foxit Software Inc..
// You cannot distribute any part of Foxit PDF SDK to any third party or general public,
// unless there is a separate license agreement with Foxit Software Inc. which explicitly grants you such rights.
//
// This file contains an example to demonstrate how to use Foxit PDF SDK to do optimize in PDF documents under a folder.


const FSDK = require("@fuxinsoft/foxit-pdf-sdk-node");
const fs = require('fs');
const os = require('os');
const path = require('path');
const util = require('util');

var sn = "Rew1vB0TqoMIxX444UcpScARWdhgJpsJfzmyMLR32a0+EgrCjp2NaQ==";
var key = "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";

const input_path = "../input_files/optimization/";
const output_path = "../output_files/";

class Optimization_Pause
{
    construct(pause_count_limit, always_pause) {
        this.pause_count_ = 0;
        this.pause_count_limit_ = pause_count_limit;
        this.always_pause_ = always_pause;  
    }

    NeedToPauseNow()
    {
        if (this.always_pause_) return true;
        if (this.pause_count_< this.pause_count_limit_)
        {
          this.pause_count_ ++;
            return true;
        } else{
          this.pause_count_ = 0;
            return false; // This is to test a case: valid PauseCallback but needParseNow() will always return FALSE.
        }
    }

    ClearCount()
    {
        this.pause_count_ = 0;
    }
};


let error_code = FSDK.Library.Initialize(sn, key);
if (FSDK.e_ErrSuccess != error_code) {
  if (FSDK.e_ErrInvalidLicense == error_code)
    console.log("[Failed] Current used Foxit PDF SDK key information is invalid.");
  else
    console.log("Library Initialize Error: %d", FSDK.e_ErrSuccess);
  return;
}

let output_directory = output_path + "optimization/";
if (!fs.existsSync(output_directory))  {
  fs.mkdirSync(output_directory);
}

console.log("Optimized Start : Image Compression.")
let input_file = input_path +  "[Optimize]ImageCompression.pdf";
try
{
    let doc = new FSDK.PDFDoc(input_file);
    let error_code = doc.Load("");
    if (error_code != FSDK.e_ErrSuccess) {
        console.log("The Doc [%s] Error: %d\n", input_path, error_code);
        return;
    }
    let pause = new Optimization_Pause(0, true);
    let settings = new FSDK.OptimizerSettings();
    let pause_callback = new FSDK.PauseCallback(pause);
    settings.SetOptimizerOptions(FSDK.OptimizerSettings.e_OptimizerCompressImages);
    let progressive = FSDK.Optimizer.Optimize(doc, settings, pause_callback);
    let progress_state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == progress_state) {
        progress_state = progressive.Continue();
        let percent = progressive.GetRateOfProgress();
        let res_string = `Optimize progress percent:${percent} %`;        
        console.log(res_string);
    }
    if (FSDK.Progressive.e_Finished == progress_state) {
        doc.SaveAs(output_directory + "ImageCompression_Optimized.pdf", FSDK.PDFDoc.e_SaveFlagRemoveRedundantObjects);
    }
} catch (e) {
  console.log(e); 
}
console.log("Optimized Finsih : Image Compression.")

console.log("Optimized Start : Clean up.")
input_file = input_path + "[Optimize]Cleanup.pdf";
try {
  let doc = new FSDK.PDFDoc(input_file);
  let error_code = doc.Load("");
  if (error_code != FSDK.e_ErrSuccess) {
    console.log("The Doc [%s] Error: %d\n", input_path, error_code);
    return 1;
  }
  let pause = new Optimization_Pause(0, true);
  let settings = new FSDK.OptimizerSettings();
  let pause_callback = new FSDK.PauseCallback(pause);
  settings.SetOptimizerOptions(FSDK.OptimizerSettings.e_OptimizerCleanUp);
  settings.SetCleanUpOptions(FSDK.OptimizerSettings.e_CleanUpRemoveInvalidBookmarks | FSDK.OptimizerSettings.e_CleanUpRemoveInvalidLinks
    | FSDK.OptimizerSettings.e_CleanUpUseFlateForNonEncodedStream | FSDK.OptimizerSettings.e_CleanUpUseFlateInsteadOfLZW);
  let progressive = FSDK.Optimizer.Optimize(doc, settings, pause_callback);
  let progress_state = FSDK.Progressive.e_ToBeContinued;
  while (FSDK.Progressive.e_ToBeContinued == progress_state) {
    progress_state = progressive.Continue();
    let percent = progressive.GetRateOfProgress();
    let res_string = `Optimize progress percent:${percent} %`;        
    console.log(res_string);
  }
  if (FSDK.Progressive.e_Finished == progress_state) {
    doc.SaveAs(output_directory + "Cleanup_Optimized.pdf", FSDK.PDFDoc.e_SaveFlagRemoveRedundantObjects);
  }
} catch (e) {
  console.log(e)  
}
console.log("Optimized Finsih : Clean up.")

console.log("Optimized Start : Discard Objects.")
input_file = input_path + "[Optimize]DiscardObjects.pdf";
try {
    let doc = new FSDK.PDFDoc(input_file);
    let error_code = doc.Load("");
    if (error_code != FSDK.e_ErrSuccess) {
        console.log("The Doc [%s] Error: %d\n", input_path, error_code);
        return 1;
    }
    let pause = new Optimization_Pause(0, true);
    let settings = new FSDK.OptimizerSettings();
    let pause_callback = new FSDK.PauseCallback(pause);
    settings.SetOptimizerOptions(FSDK.OptimizerSettings.e_OptimizerDiscardObjects);
    settings.SetDiscardObjectsOptions(FSDK.OptimizerSettings.e_DiscardObjectsBookmarks | FSDK.OptimizerSettings.e_DiscardObjectsEmbeddedPageThumbnails
        | FSDK.OptimizerSettings.e_DiscardObjectsEmbeddedPrintSettings | FSDK.OptimizerSettings.e_DiscardObjectsFlattenFormFields 
        | FSDK.OptimizerSettings.e_DiscardObjectsFormActions | FSDK.OptimizerSettings.e_DiscardObjectsJavaScriptActions);

    let progressive = FSDK.Optimizer.Optimize(doc, settings, pause_callback);
    let progress_state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == progress_state) {
      progress_state = progressive.Continue();
      let percent = progressive.GetRateOfProgress();
      let res_string = `Optimize progress percent:${percent} %`;        
      console.log(res_string);
    }
    if (FSDK.Progressive.e_Finished == progress_state) {
        doc.SaveAs(output_directory + "DiscardObjects_Optimized.pdf", FSDK.PDFDoc.e_SaveFlagRemoveRedundantObjects);
    }
}
catch (e) {
    console.log(e);
}
console.log("Optimized Finsih : Discard Objects.")
FSDK.Library.Release();
