// 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 Conversion 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 convert PDF files to Office(Word,
// Excel or PowerPoint) format files.

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

var sn = "bPxThFlBAYifO3yiW0C51bKbjPap1zHaf5aG5sX378TjFvB7Q0802A==";
var key = "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";

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

class FileReader {
  constructor() {
    this.file_ = null;
    this.file_path_ = "";
    this.hint_data_record_ = [];
  }

  LoadFile(file_path) {
    try {
      this.file_path_ = file_path;
      this.file_ = fs.openSync(file_path, 'r');
      return true;
    } catch (err) {
      console.error(err);
      return false;
    }
  }

  CloseFile() {
    fs.closeSync(this.file_);
  }

  GetSize() {
    try {
      let stats = fs.statSync(this.file_path_);
      return stats.size;
    } catch (err) {
      console.error(err);
      return 0;
    }
  }

  ReadBlock(offset, size_t) {
    try {
      let buffer = Buffer.alloc(size_t);
      fs.readSync(this.file_, buffer, 0, size_t, offset);
      return [true, buffer]
    } catch (err) {
      return [false, null];
    }
  }

  Release() {  }
}

class FileStream {  
  constructor() {
    this.file_ = null;
    this.ref_ = 1;
    this.cur_pos_ = 0;
    this.file_path_ = "";
  }
 
  LoadFile(file_path) {
    try {
      this.file_path_ = file_path;
      this.file_ = fs.openSync(file_path, 'w');
      return true;
    } catch (err) {
      console.error(err);
      return false;
    }
  }
 
  GetSize() {
    try {
      let stats = fs.statSync(this.file_path_);
      return stats.size;
    } catch (err) {
      console.error(err);
      return 0;
    }
  }
 
  Flush() {
     return true;
  }
 
  GetPosition() {
    return this.cur_pos_;
  }
 
  ReadBlock(offset, size_t) {
    try {
      let buffer = Buffer.alloc(size_t);
      fs.readSync(this.file_, buffer, 0, size_t, offset);
      return [true, buffer]
    } catch (err) {
      return [false, null];
    }
  }

 
  WriteBlock(buffer, offset, size) {
    try {
      if (!this.file_)
      return false;
      const write_size = fs.writeSync(this.file_, buffer, 0, size, offset);
      if (write_size == size) {
        this.cur_pos_ = offset + size;
        return true;
      } else {
        return false;
      }
    } catch (err) {
      console.error(err);
      return false;
    }
   }
  
  Retain() {
    this.ref_++;
  }
 
  IsEOF() {
    if (!this.file_)
       return 0;
    fs.seekSync(this.file, 0, fs.constants.SEEK_END);
    if (this.cur_pos < fs.statSync(this.file).size) {
      return false;
    }
    return true;
  }
 
  Release() {
 
  }
 };

class CustomConvertCallback {
  constructor() {

  }

  NeedToPause() {
    return true;
  }

  ProgressNotify(converted_count, total_count) {
  }
};

class CustomConvertCheckCallback {
  constructor() {

  }

  CheckUserPermissions(user_permissions) {
    return true;
  }
};

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 + "pdf2office/";
if (!fs.existsSync(output_directory))  {
  fs.mkdirSync(output_directory);
}

try {
  let library_path = "";   // Please ensure the path is valid.
  let engine_path = "";     //If you use engine to convert PDF to Office, please ensure the path is valid.
  FSDK.PDF2Office.Initialize(library_path, engine_path); //Please ensure the path is valid.

  let custom_check_callback = new CustomConvertCheckCallback();
  let convert_check_callback = new FSDK.ConvertCheckCallback(custom_check_callback);
  FSDK.PDF2Office.SetConvertCheckCallback(convert_check_callback);

  // Convert PDF file to Word format file.
  let custom_callback = new CustomConvertCallback();
  let convert_callback = new FSDK.ConvertCallback(custom_callback);
  let setting_data = new FSDK.PDF2OfficeSettingData();
  let progressive = FSDK.PDF2Office.StartConvertToWord(input_path + "word.pdf", "", output_directory + "pdf2word_result.docx", setting_data, convert_callback);
  if (progressive.GetRateOfProgress() != 100) {
    let state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == state) {
      state = progressive.Continue();
    }
  }
  console.log("Convert PDF file to Word format file with path.");

  let custom_callback_word_stream = new CustomConvertCallback();
  let convert_callback_word_stream = new FSDK.ConvertCallback(custom_callback_word_stream);
  let custom_readercallback_word = new FileReader();
  let reader_callback_word = new FSDK.FileReaderCallback(custom_readercallback_word);
  let custom_streamcallback_word = new FileStream();
  let stream_callback_word = new FSDK.StreamCallback(custom_streamcallback_word);
  custom_readercallback_word.LoadFile(input_path + "word.pdf");
  custom_streamcallback_word.LoadFile(output_directory + "pdf2word_withstream_result.docx");
  progressive = FSDK.PDF2Office.StartConvertToWord(reader_callback_word, "", stream_callback_word, setting_data, convert_callback_word_stream);
  if (progressive.GetRateOfProgress() != 100) {
    let state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == state) {
      state = progressive.Continue();
    }
  }
  console.log("Convert PDF file to Word format file with stream.")

  // Convert PDF file to Excel format file.
  progressive = FSDK.PDF2Office.StartConvertToExcel(input_path + "excel.pdf", "", output_directory + "pdf2excel_result.xlsx", setting_data, convert_callback);
  if (progressive.GetRateOfProgress() != 100) {
    let state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == state) {
      state = progressive.Continue();
    }
  }
  console.log("Convert PDF file to Excel format file with path.")

  let custom_callback_excel_stream = new CustomConvertCallback();
  let convert_callback_excel_stream = new FSDK.ConvertCallback(custom_callback_excel_stream);
  let custom_readercallback_excel = new FileReader();
  let reader_callback_excel = new FSDK.FileReaderCallback(custom_readercallback_excel);
  let custom_streamcallback_excel = new FileStream();
  let stream_callback_excel = new FSDK.StreamCallback(custom_streamcallback_excel);
  custom_readercallback_excel.LoadFile(input_path + "excel.pdf");
  custom_streamcallback_excel.LoadFile(output_directory + "pdf2excel_withstream_result.xlsx");
  progressive = FSDK.PDF2Office.StartConvertToExcel(reader_callback_excel, "", stream_callback_excel,
                                               setting_data, convert_callback_excel_stream);
  if (progressive.GetRateOfProgress() != 100) {
    let state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == state) {
      state = progressive.Continue();
    }
  }
  console.log("Convert PDF file to Excel format file with stream.")

  // Convert PDF file to PowerPoint format file.
  progressive = FSDK.PDF2Office.StartConvertToPowerPoint(input_path + "powerpoint.pdf", "", output_directory + "pdf2powerpoint_result.pptx", setting_data, convert_callback);
  if (progressive.GetRateOfProgress() != 100) {
    let state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == state) {
      state = progressive.Continue();
    }
  }
  console.log("Convert PDF file to PowerPoint format file with path.")

  let custom_callback_ppt_stream = new CustomConvertCallback();
  let convert_callback_ppt_stream = new FSDK.ConvertCallback(custom_callback_ppt_stream);
  let custom_readercallback_ppt = new FileReader();
  let reader_callback_ppt = new FSDK.FileReaderCallback(custom_readercallback_ppt);
  let custom_streamcallback_ppt = new FileStream();
  let stream_callback_ppt = new FSDK.StreamCallback(custom_streamcallback_ppt);
  custom_readercallback_ppt.LoadFile(input_path + "powerpoint.pdf");
  custom_streamcallback_ppt.LoadFile(output_directory + "pdf2powerpoint_withstream_result.pptx");
  progressive = FSDK.PDF2Office.StartConvertToPowerPoint(reader_callback_ppt, "", stream_callback_ppt, setting_data, convert_callback_ppt_stream);
  if (progressive.GetRateOfProgress() != 100) {
    let state = FSDK.Progressive.e_ToBeContinued;
    while (FSDK.Progressive.e_ToBeContinued == state) {
      state = progressive.Continue();
    }
  }
  console.log("Convert PDF file to PowerPoint format file with stream.")
  FSDK.PDF2Office.Release();
} catch (e) {
  console.log(e);
} 
FSDK.Library.Release();





