tencent cloud

chat.setMessageExtensions(message, extensions);

let promise = chat.setMessageExtensions(message, [{ key: 'a', value: '1' }, { key: 'b', value: '2' }]);
promise.then(function(imResponse) {
  // Set message extensions successfully
   const { extensions } = imResponse.data;
   extensions.forEach((item) => {
     const { code, key, value } = item;
     if (code === 23001) {
       // Key conflict detected. Please retry as needed based on the returned latest extension info
     }
   });
}).catch(function(imError) {
  // Failed to set message extensions
  console.warn('setMessageExtensions error:', imError);
});

chat.getMessageExtensions(message);

let promise = chat.getMessageExtensions(message);
promise.then(function(imResponse) {
  // Got message extensions successfully
   const { extensions } = imResponse.data;
   extensions.forEach((item) => {
     const { key, value } = item;
     // key - Message extension key
     // value - Value corresponding to the message extension key
   });
}).catch(function(imError) {
  // Failed to get message extensions
  console.warn('getMessageExtensions error:', imError);
});

chat.deleteMessageExtensions(message, keyList);

// Delete message extension key
let promise = chat.deleteMessageExtensions(message, ['a', 'b']);
promise.then(function(imResponse) {
   // Deleted message extensions successfully
   const { extensions } = imResponse.data;
   extensions.forEach((item) => {
     const { code, key, value } = item;
     if (code === 23001) {
       // Delete key conflict detected. Please retry as needed based on the returned latest extension info
     }
   });
}).catch(function(imError) {
  // Failed to delete message extensions
  console.warn('deleteMessageExtensions error:', imError);
});

// Clear all message extension keys
let promise = chat.deleteMessageExtensions(message);
promise.then(function(imResponse) {
   // Cleared message extensions successfully
   console.log('deleteMessageExtensions ok:', imResponse)
}).catch(function(imError) {
  // Failed to clear message extensions
  console.warn('deleteMessageExtensions error:', imError);
});

let onMessageExtensionsUpdated = function(event) {
  const { messageID, extensions } = event.data;
  // messageID - Message ID
  // extensions - Message extension information
  extensions.forEach((item) => {
   const { key, value } = item;
   // key - Message extension key
   // value - Value corresponding to the message extension key
  });
};
chat.on(TencentCloudChat.EVENT.MESSAGE_EXTENSIONS_UPDATED, onMessageExtensionsUpdated);

let onMessageExtensionsDeleted = function(event) {
  const { messageID, keyList } = event.data;
  // messageID - Message ID
  // keyList - List of deleted message extension keys
  keyList.forEach((key) => {
   // console.log(key)
  });
};
chat.on(TencentCloudChat.EVENT.MESSAGE_EXTENSIONS_DELETED, onMessageExtensionsDeleted);