fix bug

lib/src/manager/im_conversation_manager.dart

@@ -0,0 +1,94 @@
+import 'dart:convert';
+
+import 'package:flutter/services.dart';
+import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
+
+class ConversationManager {
+  MethodChannel _channel;
+  late ConversationListener conversationListener;
+
+  ConversationManager(this._channel);
+
+  void setConversationListener(ConversationListener listener) {
+    this.conversationListener = listener;
+    _channel.invokeMethod('setConversationListener', _buildParam({}));
+  }
+
+  Future<List<ConversationInfo>> getAllConversationList() {
+    return _channel
+        .invokeMethod('getAllConversationList', _buildParam({}))
+        .then((value) => _toList(value));
+  }
+
+  /// sourceID 若为单聊则为userID,若为群聊则为groupID
+  /// sessionType 若为单聊则为1,若为群聊则为2
+  Future<ConversationInfo> getSingleConversation(
+      {required String sourceID, required String sessionType}) {
+    return _channel
+        .invokeMethod('getOneConversation',
+            _buildParam({"sourceID": sourceID, "sessionType": sessionType}))
+        .then((value) => _toObj(value));
+  }
+
+  /// ["single_1234","group_3434"]
+  Future<List<ConversationInfo>> getMultipleConversation(
+      {required List<String> conversationIDList}) {
+    return _channel
+        .invokeMethod('getMultipleConversation',
+            _buildParam({"conversationIDList": conversationIDList}))
+        .then((value) => _toList(value));
+  }
+
+  void deleteConversation({required String conversationID}) {
+    _channel
+        .invokeMethod('deleteConversation',
+            _buildParam({"conversationID": conversationID}))
+        .then((value) => _printValue(value));
+  }
+
+  void setConversationDraft(
+      {required String conversationID, required String draftText}) {
+    _channel
+        .invokeMethod(
+            'setConversationDraft',
+            _buildParam(
+                {"conversationID": conversationID, "draftText": draftText}))
+        .then((value) => _printValue(value));
+  }
+
+  void pinConversation(
+      {required String conversationID, required bool isPinned}) {
+    _channel
+        .invokeMethod(
+            'pinConversation',
+            _buildParam(
+                {"conversationID": conversationID, "isPinned": isPinned}))
+        .then((value) => _printValue(value));
+  }
+
+  Future<dynamic> getTotalUnreadMsgCount() {
+    return _channel.invokeMethod('getTotalUnreadMsgCount', _buildParam({}));
+  }
+
+  static Map _buildParam(Map param) {
+    param["ManagerName"] = "conversationManager";
+    return param;
+  }
+
+  static List<ConversationInfo> _toList(String? value) {
+    var list = _formatJson(value);
+    if (null == list) return <ConversationInfo>[];
+    return (list as List).map((e) => ConversationInfo.fromJson(e)).toList();
+  }
+
+  static ConversationInfo _toObj(String value) =>
+      ConversationInfo.fromJson(_formatJson(value));
+
+  static dynamic _formatJson(value) {
+    return jsonDecode(_printValue(value));
+  }
+
+  static String _printValue(value) {
+    return value;
+  }
+}