Issue Summary

Currently the V2 descendants API does not return depth of each descendant in the response, making it hard to figure out which content to trigger recursive calls on.

Steps to Reproduce

Call /wiki/api/v2/<content-type>/{id}/descendants

Expected Results

Each descendant response contains depth of the descendant relative to the content on which API is called.

{
  "results": [
    {
      "id": "<string>",
      "status": "current",
      "title": "<string>",
      "parentId": "<string>",
      "childPosition": <number>,
      "type": "<string>",
      "depth": <number>
    }
  ],
  "_links": {
    "next": "<string>",
    "base": "<string>"
  }
} 

Actual Results

Response does not contain depth for each descendant:

{
  "results": [
    {
      "id": "<string>",
      "status": "current",
      "title": "<string>",
      "parentId": "<string>",
      "childPosition": <number>,
      "type": "<string>"
    }
  ],
  "_links": {
    "next": "<string>",
    "base": "<string>"
  }
} 

Workaround

Interpret the depth by evaluating relationship between parentId and id across the different descendant, starting with the top level content. This can be done by constructing the content tree and traversing it.