feature：complete lsky image upload

Author: hackycy

lib/utils/strategy/impl/lsky_image_upload.dart

@@ -0,0 +1,59 @@
+import 'dart:convert';
+
+import 'package:dio/dio.dart';
+import 'package:flutter_picgo/api/lsky_api.dart';
+import 'package:flutter_picgo/model/lsky_config.dart';
+import 'package:flutter_picgo/model/uploaded.dart';
+import 'package:flutter_picgo/resources/pb_type_keys.dart';
+import 'package:flutter_picgo/utils/image_upload.dart';
+import 'dart:io';
+
+import 'package:flutter_picgo/utils/strategy/image_upload_strategy.dart';
+import 'package:flutter_picgo/utils/strings.dart';
+
+class LskyImageUpload implements ImageUploadStrategy {
+  @override
+  Future<Uploaded> delete(Uploaded uploaded) async {
+    return uploaded;
+  }
+
+  @override
+  Future<Uploaded> upload(File file, String renameImage) async {
+    String configStr = await ImageUploadUtils.getPBConfig(PBTypeKeys.lsky);
+    if (isBlank(configStr)) {
+      throw LskyError(error: '读取配置文件错误！请重试');
+    }
+    LskyConfig config = LskyConfig.fromJson(json.decode(configStr));
+    FormData formData = FormData.fromMap({
+      "image": await MultipartFile.fromFile(file.path, filename: renameImage),
+    });
+    var result = await LskyApi.upload(config.token, config.host, formData);
+    if (result['code'] == 200) {
+      var uploadedItem =
+          Uploaded(-1, '${result['data']['url']}', PBTypeKeys.lsky, info: '');
+      await ImageUploadUtils.saveUploadedItem(uploadedItem);
+      return uploadedItem;
+    } else {
+      throw new LskyError(error: '${result['msg']}');
+    }
+  }
+}
+
+class LskyError implements Exception {
+  LskyError({
+    this.error,
+  });
+
+  dynamic error;
+
+  String get message => (error?.toString() ?? '');
+
+  @override
+  String toString() {
+    var msg = 'LskyError $message';
+    if (error is Error) {
+      msg += '\n${error.stackTrace}';
+    }
+    return msg;
+  }
+}

lib/utils/strategy/upload_strategy_factory.dart

@@ -3,6 +3,7 @@ import 'package:flutter_picgo/utils/strategy/impl/aliyun_image_upload.dart';
 import 'package:flutter_picgo/utils/strategy/impl/gitee_image_upload.dart';
 import 'package:flutter_picgo/utils/strategy/impl/github_image_upload.dart';
 import 'package:flutter_picgo/utils/strategy/image_upload_strategy.dart';
+import 'package:flutter_picgo/utils/strategy/impl/lsky_image_upload.dart';
 import 'package:flutter_picgo/utils/strategy/impl/niupic_image_upload.dart';
 import 'package:flutter_picgo/utils/strategy/impl/qiniu_image_upload.dart';
 import 'package:flutter_picgo/utils/strategy/impl/smms_image_upload.dart';
@@ -39,6 +40,9 @@ class UploadStrategyFactory {
       } else if (type == PBTypeKeys.niupic) {
         /// 牛图网
         cache[type] = new NiupicImageUpload();
+      } else if (type == PBTypeKeys.lsky) {
+        /// 兰空
+        cache[type] = new LskyImageUpload();
       }
     }
     return cache[type];