func()

in api.go [39:79]

• 38 lines of code
• 7 McCabe index (conditional complexity)

func (h apiHandlers) getStats(c *gin.Context) {
	cacheValue, _ := c.Get(cache.CACHE_MIDDLEWARE_KEY)
	cache := *cacheValue.(*persistence.CacheStore)

	const cacheKey = "shop-stats"
	var stats *Stats
	err := cache.Get(cacheKey, &stats)
	switch err {
	case nil:
		contextLogger(c).Debug("serving stats from cache")
		c.JSON(http.StatusOK, stats)
		if tx := apm.TransactionFromContext(c.Request.Context()); tx != nil {
			tx.Context.SetLabel("served_from_cache", "true")
		}
		return
	case persistence.ErrCacheMiss:
		// fetch and cache below
		if tx := apm.TransactionFromContext(c.Request.Context()); tx != nil {
			tx.Context.SetLabel("served_from_cache", "false")
		}
		break
	default:
		err := errors.Wrap(err, "failed to get stats from cache")
		c.AbortWithError(http.StatusInternalServerError, err)
		return
	}

	stats, err = getStats(c.Request.Context(), h.db)
	if err != nil {
		err := errors.Wrap(err, "failed to query stats")
		c.AbortWithError(http.StatusInternalServerError, err)
		return
	}
	if err := cache.Set(cacheKey, stats, time.Minute); err != nil {
		err := errors.Wrap(err, "failed to cache stats")
		c.AbortWithError(http.StatusInternalServerError, err)
		return
	}
	contextLogger(c).Debug("cached stats")
	c.JSON(http.StatusOK, stats)
}