将具有属性的数组映射到具有不同属性的数组

我需要这样做:

发件人:

[  {
      id: 1
      content: "hello"
      senderId: 1234
    },
    {
      id : 2
      content: "how are you"
      senderId: 1234
    },
]

[
    {
        _id: 1,
        text: 'hello',
        user: {
            _id: 1234,
        },
    },
    {
        _id: 2,
        text: 'how are you',
        user: {
            _id: 1234,
        },
    },
]

说明:

我对javascript(以及“新的”javascript用法,如ES6)非常陌生。我正在react native上写一个应用程序。我在firebase上使用mobx。

import {observable, computed} from 'mobx';
import {Fb} from '../firebase/firebase';
import {map, toJS} from 'mobx';
import {Config} from '../config/config';

class Message{
  id : string
  content : string
  senderId : string
}

class MessagesStore {
  @observable messages = []
  idConversation : string

  constructor(idConversation) {
    this.idConversation = idConversation
    Fb.messages.child(idConversation).on('value', (snapshot) => {
      value = snapshot.val();
      let message = new Message()
      message.id = value.id
      message.content = value.content
      message.senderId = value.senderId
      this.messages.push(message)
    });
  }

  @computed get allMessages(){
    return this.messages
  }

  @computed get json() {
    return toJS(this.messages);
  }
}
...

问题是我想在UI中使用一个库来聊天( https://github.com/FaridSafi/react-native-gifted-chat )

  this.setState({
         messages: [
           {
             _id: 1,
             text: 'Hello developer',
             createdAt: new Date(),
             user: {
               _id: 2,
               name: 'React Native',
               avatar: 'https://facebook.github.io/react/img/logo_og.png',
             },
           },
         ],
       })
    )

我将此代码放入:

messagesStore.messages.observe(() => ...

我的问题是:如何将我的消息数组(messagesStore.messages)映射到lib所需的数组。例如,我需要映射消息属性 到 文本 身份证件 到