tencent cloud

/// Sample API call
V2TIMMessage *message = [[V2TIMManager sharedInstance] createTextMessage:@"Group message read receipt"];
// Specify that the message requires a read receipt
message.needReadReceipt = YES;
// Send the message
[[V2TIMManager sharedInstance] sendMessage:message receiver:nil groupID:@"groupA" priority:V2TIM_PRIORITY_NORMAL onlineUserOnly:NO offlinePushInfo:nil progress:nil succ:nil fail:nil];

class SendCallback final : public V2TIMSendCallback {
public:
    using SuccessCallback = std::function<void(const V2TIMMessage&)>;
    using ErrorCallback = std::function<void(int, const V2TIMString&)>;
    using ProgressCallback = std::function<void(uint32_t)>;

    SendCallback() = default;
    ~SendCallback() override = default;

    void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
                     ProgressCallback progress_callback) {
        success_callback_ = std::move(success_callback);
        error_callback_ = std::move(error_callback);
        progress_callback_ = std::move(progress_callback);
    }

    void OnSuccess(const V2TIMMessage& message) override {
        if (success_callback_) {
            success_callback_(message);
        }
    }
    void OnError(int error_code, const V2TIMString& error_message) override {
        if (error_callback_) {
            error_callback_(error_code, error_message);
        }
    }
    void OnProgress(uint32_t progress) override {
        if (progress_callback_) {
            progress_callback_(progress);
        }
    }

private:
    SuccessCallback success_callback_;
    ErrorCallback error_callback_;
    ProgressCallback progress_callback_;
};

V2TIMMessage message = V2TIMManager::GetInstance()->GetMessageManager()->CreateTextMessage(u8"Group message read receipt");
// Specify that the message requires a read receipt
message.setNeedReadReceipt(true);

auto callback = new SendCallback{};
callback->SetCallback([=](const V2TIMMessage& message) { delete callback; },
                      [=](int error_code, const V2TIMString& error_message) { delete callback; },
                      [=](uint32_t progress) {});

V2TIMManager::GetInstance()->GetMessageManager()->SendMessage(
    message, "groupA", {}, V2TIMMessagePriority::V2TIM_PRIORITY_DEFAULT, false, {}, callback);

/// Sample API call
/// Suppose the user has read the `msg` message
if (!msg.isSelf && msg.needReadReceipt) {
    [[V2TIMManager sharedInstance] sendMessageReadReceipts:@[msg] succ:^{
        // Read receipt for the message sent successfully
    } fail:^(int code, NSString *desc) {
        // Failed to send a read receipt for the message
    }];
}

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(
    [=]() {
        // Read receipt for the message sent successfully
        delete callback;
    },
    [=](int error_code, const V2TIMString& error_message) {
        // Failed to send a read receipt for the message
        delete callback;
    });

// Suppose the user has read the `message` message
if (!message.isSelf && message.needReadReceipt) {
    V2TIMMessageVector messageList;
    messageList.PushBack(message);
    V2TIMManager::GetInstance()->GetMessageManager()->SendMessageReadReceipts(messageList, callback);
}

/// Sample API call
[[V2TIMManager sharedInstance] addAdvancedMsgListener:self];
- (void)onRecvMessageReadReceipts:(NSArray<V2TIMMessageReceipt *> *)receiptList {
    for(V2TIMMessageReceipt *receipt in receiptList) {
        // Message ID
        NSString *msgID = receipt.msgID;
        // ID of the other party of the one-to-one message
        NSString * userID = receipt.userID;
        // Read status of the other party of the one-to-one message
        BOOL isPeerRead = receipt.isPeerRead;
        // Group ID
        NSString * groupID = receipt.groupID;
        // Latest read count of the group message
        uint64_t readCount = receipt.readCount;
        // Latest unread count of the group message
        uint64_t unreadCount = receipt.unreadCount;
    }
}

class AdvancedMsgListener final : public V2TIMAdvancedMsgListener {
public:
    void OnRecvMessageReadReceipts(const V2TIMMessageReceiptVector& receiptList) override {
        for (size_t i = 0; i < receiptList.Size(); ++i) {
            const V2TIMMessageReceipt& receipt = receiptList[i];
            // Message ID
            V2TIMString msgID = receipt.msgID;
            // ID of the other party of the one-to-one message
            V2TIMString userID = receipt.userID;
            // Read status of the other party of the one-to-one message
            bool isPeerRead = receipt.isPeerRead;
            // Latest read count of the group message
            int32_t readCount = receipt.readCount;
            // Latest unread count of the group message
            int32_t unreadCount = receipt.unreadCount;
        }
    }
    // Other members ...
};

// Note that `advancedMsgListener` should not be released before the IM SDK is uninitialized,
// otherwise the message callback cannot be called.
AdvancedMsgListener advancedMsgListener;
V2TIMManager::GetInstance()->GetMessageManager()->AddAdvancedMsgListener(&advancedMsgListener);