// 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.


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

using foxit;
using foxit.common;
using foxit.common.fxcrt;
using foxit.pdf;
using foxit.pdf.graphics;
using foxit.pdf.objects;
using foxit.addon;
using foxit.addon.optimization;
namespace optimizationCS
{
    class optimization
    {
        public class Optimization_Pause : PauseCallback
        {
            public Optimization_Pause(int pause_count_limit = 0, bool always_pause = false)
            {
               pause_count_ = 0;
		       pause_count_limit_ = pause_count_limit;
               always_pause_ = always_pause;
            }

            public override bool NeedToPauseNow()
            {
                if (always_pause_) return true;
                if (pause_count_ < pause_count_limit_)
                {
                    pause_count_++;
                    return true;
                }
                else
                {
                    pause_count_ = 0;
                    return false; // This is to test a case: valid PauseCallback but needParseNow() will always return FALSE.
                }
            }
            public void ClearCount()
            {
                pause_count_ = 0;
            }
            private int pause_count_limit_ = 0;
            private int pause_count_= 0;
            private bool always_pause_=false;
        }
        static void Main(string[] args)
        {
            string input_path = "../input_files/optimization/";
            string output_path = "../output_files/optimization/";
            System.IO.Directory.CreateDirectory(output_path);
            string sn = "Rew1vB0TqoMIxX444UcpScARWdhgJpsJfzmyMLR32a0+EgrCjp2NaQ==";
            string key = "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";
            // Initialize library
            ErrorCode error_code = Library.Initialize(sn, key);
            if (error_code != ErrorCode.e_ErrSuccess) { 
                Console.WriteLine("Library Initialize Error: {0}", error_code);
                return;
            }

            Console.WriteLine("Optimized Start : Image compression.");
            try
            {
                string input_file = input_path + "[Optimize]ImageCompression.pdf";
                using (PDFDoc doc = new PDFDoc(input_file))
                {
                    error_code = doc.Load(null);
                    if (error_code != ErrorCode.e_ErrSuccess)
                    {
                        Console.WriteLine("Document Load Error: {0}", error_code);
                        return;
                    }
                    using (Optimization_Pause pause = new Optimization_Pause(0, true))
                    using (OptimizerSettings settings = new OptimizerSettings())
                    {
                        settings.SetOptimizerOptions((int)foxit.addon.optimization.OptimizerSettings.OptimizerOptions.e_OptimizerCompressImages);
                        Progressive progressive = Optimizer.Optimize(doc, settings, pause);
                        Progressive.State progress_state = Progressive.State.e_ToBeContinued;
                        while (Progressive.State.e_ToBeContinued == progress_state)
                        {
                            progress_state = progressive.Continue();
                            int percent = progressive.GetRateOfProgress();
                            Console.WriteLine("Optimize progress percent: {0}%", percent);
                        }
                        if (Progressive.State.e_Finished == progress_state)
                        {
                            doc.SaveAs(output_path + "ImageCompression_Optimized.pdf", (int)PDFDoc.SaveFlags.e_SaveFlagRemoveRedundantObjects);
                        }
                    }
                }
            }
            catch (System.Exception e)
            {
                Console.WriteLine(e.Message);
                return;
            }

            Console.WriteLine("Optimized Finsih : Image compression.");

            Console.WriteLine("Optimized Start : Clean up.");
            try
            {
                string input_file = input_path + "[Optimize]Cleanup.pdf";
                using (PDFDoc doc = new PDFDoc(input_file))
                {
                    error_code = doc.Load(null);
                    if (error_code != ErrorCode.e_ErrSuccess)
                    {
                        Console.WriteLine("Document Load Error: {0}", error_code);
                        return;
                    }
                    using (Optimization_Pause pause = new Optimization_Pause(0, true))
                    using (OptimizerSettings settings = new OptimizerSettings())
                    {
                        settings.SetOptimizerOptions((int)foxit.addon.optimization.OptimizerSettings.OptimizerOptions.e_OptimizerCleanUp);
                        settings.SetCleanUpOptions((int)(foxit.addon.optimization.OptimizerSettings.CleanUpOptions.e_CleanUpRemoveInvalidBookmarks | foxit.addon.optimization.OptimizerSettings.CleanUpOptions.e_CleanUpRemoveInvalidLinks
                          | foxit.addon.optimization.OptimizerSettings.CleanUpOptions.e_CleanUpUseFlateForNonEncodedStream | foxit.addon.optimization.OptimizerSettings.CleanUpOptions.e_CleanUpUseFlateInsteadOfLZW));
                        Progressive progressive = Optimizer.Optimize(doc, settings, pause);
                        Progressive.State progress_state = Progressive.State.e_ToBeContinued;
                        while (Progressive.State.e_ToBeContinued == progress_state)
                        {
                            progress_state = progressive.Continue();
                            int percent = progressive.GetRateOfProgress();
                            Console.WriteLine("Optimize progress percent: {0}%", percent);
                        }
                        if (Progressive.State.e_Finished == progress_state)
                        {
                            doc.SaveAs(output_path + "Cleanup_Optimized.pdf", (int)PDFDoc.SaveFlags.e_SaveFlagRemoveRedundantObjects);
                        }
                    }
                }
            }
            catch (System.Exception e)
            {
                Console.WriteLine(e.Message);
                return;
            }

            Console.WriteLine("Optimized Finsih : Clean up.");

            Console.WriteLine("Optimized Start : Discard Objects.");
            try
            {
                string input_file = input_path + "[Optimize]DiscardObjects.pdf";
                using (PDFDoc doc = new PDFDoc(input_file))
                {
                    error_code = doc.Load(null);
                    if (error_code != ErrorCode.e_ErrSuccess)
                    {
                        Console.WriteLine("Document Load Error: {0}", error_code);
                        return;
                    }
                    using (Optimization_Pause pause = new Optimization_Pause(0, true))
                    using (OptimizerSettings settings = new OptimizerSettings())
                    {
                        settings.SetOptimizerOptions((int)foxit.addon.optimization.OptimizerSettings.OptimizerOptions.e_OptimizerDiscardObjects);
                        settings.SetDiscardObjectsOptions((int)(foxit.addon.optimization.OptimizerSettings.DiscardObjectsOptions.e_DiscardObjectsBookmarks | foxit.addon.optimization.OptimizerSettings.DiscardObjectsOptions.e_DiscardObjectsEmbeddedPageThumbnails
                          | foxit.addon.optimization.OptimizerSettings.DiscardObjectsOptions.e_DiscardObjectsEmbeddedPrintSettings | foxit.addon.optimization.OptimizerSettings.DiscardObjectsOptions.e_DiscardObjectsFlattenFormFields
                          | foxit.addon.optimization.OptimizerSettings.DiscardObjectsOptions.e_DiscardObjectsFormActions | foxit.addon.optimization.OptimizerSettings.DiscardObjectsOptions.e_DiscardObjectsJavaScriptActions));
                        Progressive progressive = Optimizer.Optimize(doc, settings, pause);
                        Progressive.State progress_state = Progressive.State.e_ToBeContinued;
                        while (Progressive.State.e_ToBeContinued == progress_state)
                        {
                            progress_state = progressive.Continue();
                            int percent = progressive.GetRateOfProgress();
                            Console.WriteLine("Optimize progress percent: {0}%", percent);
                        }
                        if (Progressive.State.e_Finished == progress_state)
                        {
                            doc.SaveAs(output_path + "DiscardObjects_Optimized.pdf", (int)PDFDoc.SaveFlags.e_SaveFlagRemoveRedundantObjects);
                        }
                    }
                }
            }
            catch (System.Exception e)
            {
                Console.WriteLine(e.Message);
                return;
            }

            Console.WriteLine("Optimized Finsih : Discard Objects.\n");

            Library.Release();
        }
    }
}
