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    React Native

    Last updated: 2024-02-06 17:20:08
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      Feature Description

      After a user logs in to the application, the list of recent conversations can be displayed as in WeChat or QQ to make it easy to locate the target conversation. The conversation list features include getting the conversation list and processing the conversation list update. This document describes how to implement such features.

      Getting the Conversation List

      You can call getConversationList (Details) to get the conversation list. This API pulls locally cached conversations. If any server conversation is updated, the SDK will automatically sync the update and notify you in the V2TIMConversationListener callback.
      User conversations are returned in a list that stores V2TIMConversation objects. Currently, the IM SDK sorts conversations according to the following rules:
      The conversations obtained through this API are sorted based on the orderKey conversation object by default. The greater the orderKey value of a conversation, the higher position the conversation is in the list. The orderKey field is an integer that increases as the conversation is activated when a message is sent/received, a draft is set, or the conversation is pinned to the top.
      You can use getConversationList to implement one-time or paged pull as detailed below.

      One-time pull

      One-time pull is suitable for scenarios with a small number of conversations (up to 100). You can set the count of the pull to INT_MAX (which is generally greater than the number of conversations).
      Below is the sample code:
      const nextSeq = "0";
      const count = 100;
      const convList = await TencentImSDKPlugin.v2TIMManager
        .getConversationManager()
        .getConversationList(count, nextSeq);

      Paged pull

      If the number of conversations is great, paged pull is recommended to enhance the loading efficiency and save network traffic. The recommended number of conversations pulled per page is up to 100.
      Directions for paged pull:
      1. When you call getConversationList for the first time, set nextSeq to 0 (indicating to pull the conversation list from the beginning) and count to 50 (indicating to pull 50 conversation objects at a time).
      2. After the conversation list is pulled successfully for the first time, the V2TIMConversationResult callback of getConversationList will contain nextSeq (field for the next pull) and isFinish (indicating whether the conversation pull is completed).
      If isFinished is true, all the conversations have been pulled.
      If isFinished is false, there are more conversations that can be pulled. This does not mean that the next page of the conversation list will be pulled immediately. In common communications software, a paged pull is often triggered by a swipe operation.
      3. When the user continues to pull up the conversation list, if there are more conversations that can be pulled, you can continue to call the getConversationList API and pass in the nextSeq and count parameters (the values are from the V2TIMConversationResult object returned by the last pull) for the next pull.
      4. Repeat step 3 until isFinished is true.
      Below is the sample code:
      const nextSeq = "0";
      const count = 100;
      const convList = await TencentImSDKPlugin.v2TIMManager
        .getConversationManager()
        .getConversationList(count, nextSeq);
      const seq = convList.data.nextSeq;
      if (!convList.data.isFinished) {
        // If there are more conversations that can be pulled
      
        const convList = await TencentImSDKPlugin.v2TIMManager
          .getConversationManager()
          .getConversationList(count, seq);
      }

      Updating the Conversation List

      After the IM SDK is logged in successfully, the user goes online, or the network is disconnected and reconnected, the IM SDK will automatically update the conversation list. You can get the updated conversation list in the following steps:
      1. Add a conversation listener.
      2. Receive and process conversation changes.
      3. Remove the conversation listener. This step is optional and can be performed as needed.

      Adding a conversation listener

      Call addConversationListener (Details) to add a conversation listener to receive conversation change events.
      Below is the sample code:
      TencentImSDKPlugin.v2TIMManager
        .getConversationManager()
        .addConversationListener({
          onConversationChanged: (conversationList) => {},
          // Others                                                                                                                ));
        });

      Getting the notification of a conversation change

      You can listen for the event in V2TIMConversationListener (Details) to get the notification of a conversation list change.
      Currently, the IM SDK supports the following conversation change events:
      Event
      Description
      Suggestion
      onSyncServerStart
      Server conversation sync started.
      The SDK will automatically sync server conversations after a successful login or network reconnection. You can listen for such an event and display the event progress on the UI.
      onSyncServerFinish
      Server conversation sync was completed.
      If there is a conversation change, the change will be notified through the onNewConversation/onConversationChanged callback.
      onSyncServerFailed
      Server conversation sync failed.
      You can listen for such an event and display the event exception on the UI.
      onNewConversation
      A new conversation was added.
      When the user receives a one-to-one message from a new colleague or is invited to a new group, you can re-sort the conversations.
      onConversationChanged
      There is a conversation update
      When the unread count changes or the last message is updated, you can re-sort the conversations.
      onTotalUnreadMessageCountChanged
      Notification of a change in the total unread count of the conversation
      For more information, see unreadCount.
      Below is the sample code:
      // Listen for the conversation
      TencentImSDKPlugin.v2TIMManager
        .getConversationManager()
        .addConversationListener({
          onConversationChanged: (conversationList) => {},
          onNewConversation: (conv) => {},
          onSyncServerFailed: () => {},
          onSyncServerFinish: () => {},
          onSyncServerStart: () => {},
          onTotalUnreadMessageCountChanged: (count) => {},
        });

      Removing a conversation listener

      Call removeConversationListener (Details) to remove a conversation listener to stop receiving conversation change events. This step is optional and can be performed as needed.
      Below is the sample code:
      conversationManager.removeConversationListener(conversationListener);

      Sending a message without updating the lastMessage

      On the conversation list UI, it is usually necessary to display the preview and send time of the latest message in each conversation. In this case, you can use lastMessage of V2TIMConversation as the data source for implementation. However, in some cases, if you don't want some messages (such as system tips) to be displayed as the latest message in a conversation, you can set isExcludedFromLastMessage to false/no when calling sendMessage.
      For directions on how to send a message, see sendMessage.
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