如何在javascript中动态构建json数组

Question

我从 wit.ai 收到一个带有一些快速回复元素的 json 对象，如下所示：

 "msg": "So glad to have you back.  What do you want me to do?  
 "action_id": "6fd7f2bd-db67-46d2-8742-ec160d9261c1",
 "confidence": 0.08098269709064443,
 "quickreplies": [
   "News?",
   "Subscribe?",
   "Contribute?",
   "Organize?"
 ],
 "type": "msg"

然后我需要将它们转换为稍微不同的格式，因为它们被传递到 FaceBook Messenger，如下面的代码中所述。 Wit 只公开“msg”和“quickreplies”。你能提出一个好的方法来做到这一点吗？据我了解，它在“console.log(element)”之后。

      if (quickreplies){
        // got simple array of quickreplies
        // need to format quickreplies for FB:
                                  //  "quick_replies":[
                                  //     {
                                  //       "content_type":"text",
                                  //       "title":"Red",
                                  //       "payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_RED"
                                  //     },
                                  //     {
                                  //       "content_type":"text",
                                  //       "title":"Green",
                                  //       "payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_GREEN"
                                  //     }
        console.log('we got quickreplies, here they are:');
        var quick_replies = []; // ??
        quickreplies.forEach(function(element) {
          console.log(element)

        });
      }
      else (console.log('no quickreplies'));                               

在上面的例子中，最终结果应该是这样的：

 "recipient":{
    "id":"USER_ID"
  },
  "message":{
    "text":"Pick a color:",
    "quick_replies":[
      {
        "content_type":"text",
        "title":"Red",
        "payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_RED"
      },
      {
        "content_type":"text",
        "title":"Green",
        "payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_GREEN"
      }
    ]
  }

Answer 1

我不确定这是否是一个混乱的过程，但没有“JSON 对象”这样的东西。一种处理JSON.parse 返回的数据对象的方式与处理任何其他对象的方式相同。当然，在发送到 FB 之前，数据对象必须使用JSON.stringify 转换为 JSON 字符串格式。这可能在某些代码库中自动发生，具体取决于数据的发送方式。

这是一个准备 quick-replies 数组的示例 - 我只是为有效负载选择了一个示例结构并使用它。 quick_replies 数组仍然是一个对象，尚未转换为 JSON 字符串。

编辑纯文本payload的格式，如第一个text only example for quick replies所示，表示payload是一个字符串。以下代码已更新以满足此要求。

// test values for quickreplies:

var quickreplies= [ "News?", "Subscribe?", "Contribute?", "Organize?" ];

/********

     convert quickreplies to quick_replies array
     using an example payload of:

     { "text" : "text string",       // button text
       "index" : index,              // index into quickreply for button
       "other": "tbd"                // anything else needed in a reply
     }

*********/
var quick_replies;
if (quickreplies) {
    console.log('we got quickreplies, here they are:');
    quick_replies = quickreplies.map( function(element, index) {

        var payload = {
                text: element,
                index: index,
                other: "tbd"    // example value only.
        };
        var payloadString = JSON.stringify( payload);
        console.log(element);
        var quick_reply = {
            content_type: "text",
            title: element,
            payload: payloadString
        };
        console.log("** converted to : " + JSON.stringify(quick_reply));
    });
    quickreplies=null; // housekeeping
}
else {
    console.log('no quickreplies');
    quick_replies = undefined; // or [] ?
}