postTransformer.js

var posts = response.posts.map(post => {
    
    var reason = post.reason_title ? {
      type: post.reason_title.reason_enum,
      user: {
        id: post.reason_title.user.user_id,
        name: post.reason_title.user.name,
      }
    } : null;
    
    var follow_up_to = post.mobile_follow_up_to ? {
      id: post.mobile_follow_up_to.post_id,
      question: post.mobile_follow_up_to.q_text,
    } : null;
    
    return {
      id: post._id,
      question: post.q_text,
      answer: post.a_simple_text,
      allow_comments: post.allow_comments,
      asked_at: post.created_at,
      asked_by: { 
        id: post.creator_id,
        name: post.creator_name,
        photo: post.creator_pic_url,
      },
      answered_at: post.answered_at,
      answered_by: {
        id: post.user_id,
        name: post.user_name,
        photo: post.user_pic_url,
      },
      photos: post.photos,
      liked: post.liked,
      stats: {
        comments: post.num_comments,
        likes: post.num_likes,
        views: post.num_views,
      },
      reason,
      follow_up_to,
      tags: post.tags,
      updated_at: post.updated_at,
      permalink: post.full_link,
    }
  });