Refactor caching logic and add support for a new feature

http/handler.go

@@ -2,6 +2,7 @@ package http
 
 import (
 	"net/http"
+	"os"
 
 	"github.com/labstack/echo/v4"
 	"github.com/siteworxpro/top-wallpaper/redis"
@@ -14,7 +15,10 @@ func Get(c echo.Context) error {
 		return c.String(http.StatusInternalServerError, "Internal Server Error: "+err.Error())
 	}
 
-	val, err := rc.Get(redis.CacheKey)
+	defer rc.Close()
+
+	nsfw := (c.QueryParam("nsfw") == "true" || c.QueryParam("nsfw") == "1") && os.Getenv("NSFW_MODE") == "true"
+	val, err := rc.Get(rc.GetCacheKey(nsfw))
 
 	if err != nil || val == "" {
 		return c.NoContent(http.StatusNoContent)