重新映射json对象以进行消息传递

Question

我正在尝试将Twitter直接消息数据重新映射到mongodb的对话中。

"events": [
        {
            "type": "message_create",
            "id": "1023372540847312900",
            "created_timestamp": "1532826001737",
            "message_create": {
                "target": {
                    "recipient_id": "605675237"
                },
                "sender_id": "1020464064684806146",
                "source_app_id": "268278",
                "message_data": {
                    "text": "all right mate thank you too",
                    "entities": {
                        "hashtags": [],
                        "symbols": [],
                        "user_mentions": [],
                        "urls": []
                    }
                }
            }
        },
        {
            "type": "message_create",
            "id": "1023372444210524164",
            "created_timestamp": "1532825978697",
            "message_create": {
                "target": {
                    "recipient_id": "1020464064684806146"
                },
                "sender_id": "605675237",
                "message_data": {
                    "text": "Okay thank you mate, this is distinquish",
                    "entities": {
                        "hashtags": [],
                        "symbols": [],
                        "user_mentions": [],
                        "urls": []
                    }
                }
            }
        },
        {
            "type": "message_create",
            "id": "1023372325150965765",
            "created_timestamp": "1532825950311",
            "message_create": {
                "target": {
                    "recipient_id": "1020464064684806146"
                },
                "sender_id": "69565292",
                "message_data": {
                    "text": "Hello strow bree how are you",
                    "entities": {
                        "hashtags": [],
                        "symbols": [],
                        "user_mentions": [],
                        "urls": []
                    }
                }
            }
        },
        {
            "type": "message_create",
            "id": "1023245595790778372",
            "created_timestamp": "1532795735677",
            "message_create": {
                "target": {
                    "recipient_id": "605675237"
                },
                "sender_id": "1020464064684806146",
                "source_app_id": "268278",
                "message_data": {
                    "text": "Once at a social gathering, Gladstone said to Disraeli",
                    "entities": {
                        "hashtags": [],
                        "symbols": [],
                        "user_mentions": [],
                        "urls": []
                    }
                }
            }
        },
        {
            "type": "message_create",
            "id": "1023245133637140484",
            "created_timestamp": "1532795625491",
            "message_create": {
                "target": {
                    "recipient_id": "1020464064684806146"
                },
                "sender_id": "605675237",
                "message_data": {
                    "text": "On Krat's main screen appeared the holo image of a man, and several dolphins. From the man's shape, Krat could tell it was a female, probably their leader.    \"...stupid creatures unworthy of the name `sophonts.'  Foolish, pre-sentient upspring of errant masters.  We slip away from all your armed might, laughing at your clumsiness!  We slip away as we always will, you pathetic creatures. And now that we have a real head start",
                    "entities": {
                        "hashtags": [],
                        "symbols": [],
                        "user_mentions": [],
                        "urls": []
                    }
                }
            }
        }
    ],
    "apps": {
        "268278": {
            "id": "268278",
            "name": "Twitter Web Client",
            "url": "http://twitter.com"
        }
    }
}

我正在尝试将此数据更改为此；

[{
    members: [ '605675237', '1020464064684806146' ],
    messages: [
        { author: '605675237', body: 'On Krats main screen appeared the holo image of a man, and several dolphins. From the mans shape, Krat could tell it was a female, probably their leader ...stupid creatures unworthy of the name sophonts  Foolish, pre-sentient upspring of errant masters.  We slip away from all your armed might, laughing at your clumsiness!  We slip away as we always will, you pathetic creatures. And now that we have a real head start' },
        { author: '1020464064684806146', body: 'Once at a social gathering, Gladstone said to Disraeli' }
        { author: '605675237', body: 'Okay thank you mate, this is distinquish' }
        { author: '1020464064684806146', body: 'all right mate thank you too' },
    ]
},
{
    members: ['69565292', '1020464064684806146'],
    messages: [
        { author: '69565292', body: 'Hello strow bree how are you' }
    ]
}]

user_id1必须是sender_id，user_id2必须是收件人_id，但实际上，我可能必须按sender_id和收件人_id对twitter DM对象进行分组。

我怎样才能轻松解决这个问题的任何建议？

也许我们可以使用Lodash或Underscore轻松解决此重新映射。

Answer 1

解决方案是按用户ID对消息进行分组，我从ID创建了一个散列以使其适合对象：

const normalized = {};
data.events.forEach(event => {
  // Just of easier access
  const message = event.message_create;

  // Create a temp hash which identify 2 user conversation.
  // The hash is just the 2 ids with a `|` separated them
  const hashedUsers = [message.sender_id, message.target.recipient_id].sort().join('|');

  // The end object you wanted
  const normalizedMessage = {
    author: message.sender_id,
    body: message.message_data.text
  };

  // Check if we already have this 2 users conversations, create a list of their messages
  if (!normalized.hasOwnProperty(hashedUsers)) {
    normalized[hashedUsers] = [normalizedMessage];
  } else {
    normalized[hashedUsers].push(normalizedMessage);
  }
});


// Now we have a normalized object, the keys are the hash we created and the values are their messages
// so we can create the object you wanted:
const output = []
Object.entries(normalized).forEach(([key, value]) => {
  output.push({
    members: key.split('|'),
    messages: value
  })
})