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    Android&iOS&Windows&Mac

    Last updated: 2023-11-14 18:11:03
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      Function Description

      The message response function refers to interacting with a specific message, a typical scenario being emoji responses. Emoji responses are interactive responses using emoticons, and we can see the number of respondents and the list of respondents for each emoji.
      Currently, there are two common styles of message response display:
      Style one：
      Style two：
      
      
      
      
      
      
      When the user clicks on an emoji, it will jump to the emoji response detail interface:
      
      
      
      Users can paginate fetching user profile based on a specific emoji.
      
      You can implement emoji response capabilities based on SDK API:
      Call addMessageReaction interface to add an emoji to a message. After adding successfully, the current operating user will be stored under the emoji.
      Call removeMessageReaction interface to delete the added emoji. After deleting successfully, the current operating user will no longer be stored under the emoji.
      Call getMessageReactions interface to batch fetch the emoji list of multiple messages. Each emoji contains the total number of current users and the first N (default 10) user profiles.
      Call getAllUserListOfMessageReaction interface to paginate fetching the full list of user profiles using the message emoji.
      Listen to the onRecvMessageReactionsChanged callback to perceive the change of user profile of the emoji. The callback will carry the latest user profile of the emoji (including the total number of users and the first N user profiles).
      Note
      You need to buy Flagship Edition to use this feature.
      Supported only in 7.4 and later versions.

      Add message reaction

      Calling the addMessageReaction (Android / iOS & Mac / Windows) interface can add message reaction.
      Add message reaction interface input parameter explanation is as follows:
      Input Parameter
      Definition
      Description
      message
      Message object
      The message must be in a Sent successfully status.
      reactionID
      Message reaction ID
      In the emoticon response scenario, the reactionID is the emoticonID.
      Note
      1. A single message supports up to 10 reactions, and a single reaction supports up to 100 users.
      2. If the total count of reactions in a single message exceeds the maximum limit, the interface will report ERR_SVR_MSG_REACTION_COUNT_LIMIT error.
      3. If the total count of users in a single reaction exceeds the maximum limit, the interface will report ERR_SVR_MSG_REACTION_USER_COUNT_LIMIT error.
      4. If the reaction already contains the current operating user, the interface will report ERR_SVR_MSG_REACTION_ALREADY_CONTAIN_USER error.
      Sample code:
      Android
      iOS & Mac
      Windows
      V2TIMManager.getMessageManager().addMessageReaction(message, "emoji", new V2TIMCallback() {
          @Override
          public void onSuccess() {
             // add message reaction succ
          }
          @Override
          public void onError(int code, String desc) {
             // add message reaction failed
          }
      });
      [[V2TIMManager sharedInstance] addMessageReaction:message reactionID:@"emoji" succ:^{
          // add message reaction succ
      } fail:^(int code, NSString *desc) {
          // add message reaction failed
      }];
      class Callback final : public V2TIMCallback {
      public:
          using SuccessCallback = std::function<void()>;
          using ErrorCallback = std::function<void(int, const V2TIMString &)>;
          Callback() = default;
          ~Callback() override = default;
          void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) {
              success_callback_ = std::move(success_callback);
              error_callback_ = std::move(error_callback);
          }
          void OnSuccess() override {
              if (success_callback_) {
                  success_callback_();
              }
          }
          void OnError(int error_code, const V2TIMString &error_message) override {
              if (error_callback_) {
                  error_callback_(error_code, error_message);
              }
          }
      private:
          SuccessCallback success_callback_;
          ErrorCallback error_callback_;
      };
      
      auto *callback = new Callback{};
      callback->SetCallback(
          [=]() {
              // add message reaction succ
              delete callback;
          },
          [=](int error_code, const V2TIMString &error_message) {
              // add message reaction failed
              delete callback;
          });
      V2TIMManager::GetInstance()->GetMessageManager()->AddMessageReaction(message, "emoji", callback);

      Remove message reaction

      Calling the removeMessageReaction (Android / iOS & Mac/ Windows) interface can add message reaction.
      Remove message reaction interface input parameter explanation is as follows:
      Input Parameter
      Definition
      Description
      message
      Message object
      The message must be in a Sent successfully status.
      reactionID
      Message reaction ID
      In the emoticon response scenario, the reactionID is the emoticonID.
      Note
      If the reaction does not exist, the interface will report ERR_SVR_MSG_REACTION_NOT_EXISTS error.
      If the reaction does not contain the current user, the interface will report ERR_SVR_MSG_REACTION_NOT_CONTAIN_USER error.
      Sample code:
      Android
      iOS & Mac
      Windows
      V2TIMManager.getMessageManager().removeMessageReaction(message, "emoji", new V2TIMCallback() {
          @Override
          public void onSuccess() {
             // remove message reaction succ
          }
          @Override
          public void onError(int code, String desc) {
             // remove message reaction failed
          }
      });
      [[V2TIMManager sharedInstance] removeMessageReaction:message reactionID:@"emoji" succ:^{
          // remove message reaction succ
      } fail:^(int code, NSString *desc) {
          // remove message reaction failed
      }];
      class Callback final : public V2TIMCallback {
      public:
          using SuccessCallback = std::function<void()>;
          using ErrorCallback = std::function<void(int, const V2TIMString &)>;
          Callback() = default;
          ~Callback() override = default;
          void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) {
              success_callback_ = std::move(success_callback);
              error_callback_ = std::move(error_callback);
          }
          void OnSuccess() override {
              if (success_callback_) {
                  success_callback_();
              }
          }
          void OnError(int error_code, const V2TIMString &error_message) override {
              if (error_callback_) {
                  error_callback_(error_code, error_message);
              }
          }
      private:
          SuccessCallback success_callback_;
          ErrorCallback error_callback_;
      };
      
      auto *callback = new Callback{};
      callback->SetCallback(
          [=]() {
              // remove message reaction succ
              delete callback;
          },
          [=](int error_code, const V2TIMString &error_message) {
              // remove message reaction failed
              delete callback;
          });
      V2TIMManager::GetInstance()->GetMessageManager()->RemoveMessageReaction(message, "emoji", callback);

      Get message reactions

      Calling thegetMessageReactions (Android / iOS & Mac/ Windows) interface can get multiple message reactions.
      Get message reactions interface input parameter explanation is as follows:
      Input Parameter
      Definition
      Description
      messageList
      Message object list
      Supports up to 20 messages at a time.
      maxUserCountPerReaction
      Each Reaction returns the maximum user profile quantity
      The value range is 【0,10】. Every reaction only supports returning the first 10 user profile at most. If you need more user profile, you can call the getAllUserListOfMessageReaction interface to pull in pages.
      Get message reactions information resultV2TIMMessageReactionResult object explanation is as follows:
      Input Parameter
      Definition
      Description
      resultCode
      Result code
      0：indicates success.
      Non-zero: indicates failure.
      resultInfo
      Result info
      result info.
      msgID
      Unique ID of the message
      Unique ID of the message.
      reactionList
      Message reaction list
      Message reaction V2TIMMessageReaction object list.
      The detailed explanation of the V2TIMMessageReaction object is as follows:
      Input Parameter
      Definition
      Description
      reactionID
      Message reaction id
      In the emoticon response scenario, the reactionID is the emoticonID.
      totalUserCount
      Total user count
      The total count of users which have added reaction with the same ID to a message.
      partialUserList
      
      Partial user list
      The partial user list which have added reaction with the same ID to a message.
      The count of users depends on the maxUserCountPerReaction value set when calling the getMessageReactions interface.
      reactedByMyself
      Whether I have used this reaction
      This field returns true if I use the reaction.
      Sample code:
      Android
      iOS & Mac
      Windows
      V2TIMManager.getMessageManager().getMessageReactions(msgList, 5, 
          new V2TIMValueCallback<List<V2TIMMessageReactionResult>>() {
          @Override
          public void onSuccess(List<V2TIMMessageReactionResult> v2TIMMessageReactionResults) {
              // get message reactions succ
              for (V2TIMMessageReactionResult reactionResult : v2TIMMessageReactionResults) {
                  int resultCode = reactionResult.getResultCode();
                  String resultInfo = reactionResult.getResultInfo();
                  List<V2TIMMessageReaction> reactionList = reactionResult.getReactionList();
                  for (V2TIMMessageReaction reaction : reactionList) {
                      String reactionID = reaction.getReactionID();
                      int totalUserCount = reaction.getTotalUserCount();
                      List<V2TIMUserInfo> partialUserList = reaction.getPartialUserList();
                  }
              }
          }
          @Override
          public void onError(int code, String desc) {
              // get message reactions failed
          }
      });
      [[V2TIMManager sharedInstance] getMessageReactions:msgList maxUserCountPerReaction:5 
          succ:^(NSArray<V2TIMMessageReactionResult *> *resultList) {
          // get message reactions succ
          for (V2TIMMessageReactionResult *result in resultList) {
              int32_t resultCode = result.resultCode;
              NSString *resultInfo = result.resultInfo;
              NSArray *reactionList = result.reactionList;
              for (V2TIMMessageReaction *reaction in reactionList) {
                  NSString *reactionID = reaction.reactionID;
                  uint32_t totalUserCount = reaction.totalUserCount;
                  NSArray *partialUserList = reaction.partialUserList;
              }
          }
      } fail:^(int code, NSString *desc) {
          // get message reactions failed
      }];
      template <class T>
      class ValueCallback final : public V2TIMValueCallback<T> {
      public:
          using SuccessCallback = std::function<void(const T &)>;
          using ErrorCallback = std::function<void(int, const V2TIMString &)>;
          ValueCallback() = defalt;
          ~ValueCallback() override = default;
          void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) {
              success_callback_ = std::move(success_callback);
              error_callback_ = std::move(error_callback);
          }
          void OnSuccess(const T &value) override {
              if (success_callback_) {
                  success_callback_(value);
              }
          }
          void OnError(int error_code, const V2TIMString &error_message) override {
              if (error_callback_) {
                  error_callback_(error_code, error_message);
              }
          }
      private:
          SuccessCallback success_callback_;
          ErrorCallback error_callback_;
      };
      
      auto *callback = new ValueCallback<V2TIMMessageReactionResultVector>{};
      callback->SetCallback(
          [=](const V2TIMMessageReactionResultVector &messageReactionResultList) {
              // get message reactions succ
              delete callback;
          },
          [=](int error_code, const V2TIMString &error_message) {
              // get message reactions failed
              delete callback;
          });
      V2TIMMessageVector message_list;
      message_list.PushBack(message);
      V2TIMManager::GetInstance()->GetMessageManager()->GetMessageReactions(message_list, 5, callback);

      Get all user list of message reaction

      Calling thegetAllUserListOfMessageReaction (Android / iOS & Mac / Windows) interface can get all user list of message reaction.
      Get all user list of message reaction interface input parameter explanation is as follows:
      Input Parameter
      Definition
      Description
      message
      Message object
      The message must be in a Sent successfully status.
      reactionID
      Message reaction ID
      In the emoticon response scenario, the reactionID is the emoticonID.
      nextSeq
      The next pulling-by-page cursor
      Pass 0 for the first time, and pass the nextSeq returned by succ for subsequent pagination.
      count
      The maximum count of users fetched per page
      Up to 100.
      Sample code:
      Android
      iOS & Mac
      Windows
      int nextSeq = 0;
      int count = 100;
      V2TIMManager.getMessageManager().getAllUserListOfMessageReaction(message, "emoji", nextSeq, count, 
          new V2TIMValueCallback<V2TIMMessageReactionUserResult>() {
          @Override
          public void onSuccess(V2TIMMessageReactionUserResult v2TIMMessageReactionUserResult) {
              // get all user list of message reaction succ
              // nextSeq：next pull sequence
          }
          @Override
          public void onError(int code, String desc) {
              // get all user list of message reaction failed
          }
      });
      uint32_t nextSeq = 0;
      uint32_t count = 100;
      [[V2TIMManager sharedInstance] getAllUserListOfMessageReaction:message reactionID:@"emoji" nextSeq:nextSeq count:count 
         succ:^(NSArray<V2TIMUserInfo *> *userList, uint32_t nextSeq, BOOL isFinished) {
          // get all user list of message reaction succ
          // nextSeq：next pull sequence
      } fail:^(int code, NSString *desc) {
          // get all user list of message reaction failed
      }];
      template <class T>
      class ValueCallback final : public V2TIMValueCallback<T> {
      public:
          using SuccessCallback = std::function<void(const T &)>;
          using ErrorCallback = std::function<void(int, const V2TIMString &)>;
          ValueCallback() = defalt;
          ~ValueCallback() override = default;
          void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) {
              success_callback_ = std::move(success_callback);
              error_callback_ = std::move(error_callback);
          }
          void OnSuccess(const T &value) override {
              if (success_callback_) {
                  success_callback_(value);
              }
          }
          void OnError(int error_code, const V2TIMString &error_message) override {
              if (error_callback_) {
                  error_callback_(error_code, error_message);
              }
          }
      private:
          SuccessCallback success_callback_;
          ErrorCallback error_callback_;
      };
      
      auto *callback = new ValueCallback<V2TIMMessageReactionUserResult>{};
      callback->SetCallback(
          [=](const V2TIMMessageReactionUserResult &messageReactionUserResult) {
              // get all user list of message reaction succ
              delete callback;
          },
          [=](int error_code, const V2TIMString &error_message) {
              // get all user list of message reaction failed
              delete callback;
          });
      V2TIMManager::GetInstance()->GetMessageManager()->GetAllUserListOfMessageReaction(message, "emoji", 0, 100, callback);

      Message reaction information change notification

      If you have added an advanced message event listener in advance by calling addAdvancedMsgListener, you will receive the onRecvMessageReactionsChanged (Android / iOS & Mac / Windows) callback when the message reaction information is updated. It should be noted that this callback is an incremental callback for message Reaction, and it will only carry the changed Reaction information. When the totalUserCount field value in the changed Reaction information is 0, it means that no users are using this Reaction, and you can remove the display of this Reaction on the UI.
      Sample code:
      Android
      iOS & Mac
      Windows
      V2TIMManager.getMessageManager().addAdvancedMsgListener(new V2TIMAdvancedMsgListener() {
          @Override
          public void onRecvMessageReactionsChanged(List<V2TIMMessageReactionChangeInfo> changeInfos) {
             // receive message reactions changed notify
             String msgID = changeInfo.getMessageID();
             // changed reaction list
             List<V2TIMMessageReaction> reactionList = changeInfo.getReactionList();
          }
      });
      [[V2TIMManager sharedInstance] addAdvancedMsgListener:self];
      - (void)onRecvMessageReactionsChanged:(NSArray<V2TIMMessageReactionChangeInfo *> *)changeList {
           // receive message reactions changed notify
          for (V2TIMMessageReactionChangeInfo *changeInfo in changeList) {
              NSString *msgID = changeInfo.msgID;
              // changed reaction list
              NSArray *reactionList = changeInfo.reactionList;
          }
      }
      V2TIMManager::GetInstance()->GetMessageManager()->AddAdvancedMsgListener(this);
      void OnRecvMessageReactionsChanged(const V2TIMMessageReactionChangeInfoVector &changeInfos) override {
           // receive message reactions changed notify
           for (size_t i = 0; i < changeInfos.Size(); i++) {
               V2TIMMessageReactionChangeInfo reactionChangeInfo = changeInfos[i];
               V2TIMString msgID = reactionChangeInfo.msgID;
               // changed reaction list
               V2TIMMessageReactionVector reactionList = reactionChangeInfo.reactionList;
           }
       }
      
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