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. Try again according to the latest extension information returned as needed.
     }
   });
}).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` - key in the message extension
     // `value` - value of the key in the message extension
   });
}).catch(function(imError){
  // Failed to get message extensions
  console.warn('getMessageExtensions error:', imError);
});

chat.deleteMessageExtensions(message, keyList);

// Delete message extension keys
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) {
       // `key` conflict. Try again according to the latest extension information returned as needed.
     }
   });
}).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) {
   // Message extensions cleared successfully
   console.log('deleteMessageExtensions ok:', imResponse)
}).catch(function(imError){
  // Failed to clear the message extensions
  console.warn('deleteMessageExtensions error:', imError);
});

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

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