kmpdfkit_demo/lib/cpdf_converter.dart

///  cpdf_converter.dart
///
///  Copyright © 2014-2023 PDF Technologies, Inc. All Rights Reserved.
///
///  THIS SOURCE CODE AND ANY ACCOMPANYING DOCUMENTATION ARE PROTECTED BY INTERNATIONAL COPYRIGHT LAW
///  AND MAY NOT BE RESOLD OR REDISTRIBUTED. USAGE IS BOUND TO THE ComPDFKit LICENSE AGREEMENT.
///  UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS SUBJECT TO CIVIL AND CRIMINAL PENALTIES.
///  This notice may not be removed from this file.

import 'dart:collection';

import 'package:flutter/services.dart';
import 'package:kmpdfkit_conversion_flutter/models/task_result.dart';
import 'models/task_status.dart';
import 'models/convert_type.dart';
import 'models/options/options.dart';
import 'package:path/path.dart' as p;

typedef TaskResultCallback = Function(TaskResult result);

class CPDFConverter {
  static const EventChannel _channel =
      EventChannel('com.compdfkit.conversion.flutter.convert');

  static const MethodChannel _sdkGlobalChannel =
      MethodChannel('com.compdfkit.conversion.flutter.convert.sdk.info');

  static const _methodChannel =
      MethodChannel('com.compdfkit.conversion.flutter.convert.method');

  static Future<String> init(String key, String secret) async {
    String request = await _sdkGlobalChannel
        .invokeMethod('conversion_init', {"key": key, "secret": secret});
    return request;
  }

  ///get conversion sdk version info
  static Future<String> getSDKBuildTag() async {
    var sdkBuildTag = await _sdkGlobalChannel.invokeMethod('sdk_build_tag');
    return sdkBuildTag;
  }

  static Future<String> getSDKVersion() async {
    var sdkVersion = await _sdkGlobalChannel.invokeMethod('sdk_version');
    return sdkVersion;
  }

  static Future<String> getOutputPath() async {
    var outPutPath =
        await _sdkGlobalChannel.invokeMethod('request_convert_output_path');
    return outPutPath;
  }

  /// Submit the conversion task
  /// taskId : unique value
  /// filePath : PDF file path
  /// password : pdf file password
  /// convertType : Converted format type
  static convert(
      {required String taskId,
      required String filePath,
      String password = "",
      required ConvertType convertType,
      required String outputPath,
      required Options options,
      required TaskResultCallback callback}) {
    HashMap<String, dynamic> map = HashMap();
    map['convertType'] = convertType.name;
    map['filePath'] = filePath;
    map['taskId'] = taskId;
    map['outputDir'] = outputPath;
    map['fileName'] = p.basenameWithoutExtension(filePath);
    map["password"] = password;
    map.addAll(options.map);
    _channel.receiveBroadcastStream(map).listen((event) {
      Map<dynamic, dynamic> result = event;
      int statusCode = result['status'];
      int progress = result['progress'];
      String? outputPath = result['outputPath'];
      String taskId = result['taskId'];
      callback(TaskResult(
          taskId, getConvertStatusByCode(statusCode), progress, outputPath));
    });
  }

  static void cancelTask() {
    _methodChannel.invokeMethod('cancel_task');
  }
}