Function courseArenaLadder

app/core/urls.js:27–34

({ level, courseInstance })

  },

  courseArenaLadder ({ level, courseInstance }) {
    level = level?.attributes || level
    courseInstance = courseInstance?.attributes || courseInstance
    if (!level || !courseInstance) {
      return
    }
    return `/play/ladder/${level.slug}/course/${courseInstance._id}`
  },

  courseLevel ({ level, courseInstance }) {
    let url = `/play/level/${level.get('slug')}?course=${courseInstance.get(