Refactor error handling and improve code readability

http/handler.go

@@ -1,9 +1,10 @@
 package http
 
 import (
+	"net/http"
+
 	"github.com/labstack/echo/v4"
 	"github.com/siteworxpro/top-wallpaper/redis"
-	"net/http"
 )
 
 func Get(c echo.Context) error {

main.go

@@ -14,6 +14,10 @@ import (
 	"github.com/siteworxpro/top-wallpaper/redis"
 )
 
+type contextKey string
+
+const ContextKeyLogger contextKey = "logger"
+
 func main() {
 
 	ctx, fn := context.WithCancel(context.Background())
@@ -23,7 +27,8 @@ func main() {
 
 	if err != nil {
 		log.Error("Could not initialize Redis client: ", err)
-		os.Exit(1)
+
+		return
 	}
 
 	e := echo.New()
@@ -56,7 +61,7 @@ func main() {
 	}
 
 	ctx = redis.WithContext(ctx, rc)
-	ctx = context.WithValue(ctx, "logger", e.Logger)
+	ctx = context.WithValue(ctx, ContextKeyLogger, e.Logger)
 
 	go reddit.Fetch(ctx)
 

reddit/client.go

@@ -60,15 +60,16 @@ func GetLatestImage(httpGet func(url string) (*http.Response, error)) (string, e
 	if err != nil {
 		return "", err
 	}
-	defer func(Body io.ReadCloser) {
-		_ = Body.Close()
-	}(response.Body)
+	defer response.Body.Close()
 
 	if response.StatusCode != http.StatusOK {
 		return "", fmt.Errorf("error fetching reddit data: %s", response.Status)
 	}
 
 	jsonBytes, err := io.ReadAll(response.Body)
+	if err != nil {
+		return "", err
+	}
 
 	redditData := redditResponse{}
 	err = json.Unmarshal(jsonBytes, &redditData)

reddit/fetcher.go

@@ -2,9 +2,6 @@ package reddit
 
 import (
 	"context"
-	"github.com/labstack/echo/v4"
-	"github.com/siteworxpro/top-wallpaper/redis"
-	"github.com/siteworxpro/top-wallpaper/resize"
 	"io"
 	"net/http"
 	"net/url"
@@ -12,6 +9,10 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/labstack/echo/v4"
+	"github.com/siteworxpro/top-wallpaper/redis"
+	"github.com/siteworxpro/top-wallpaper/resize"
 )
 
 func Fetch(ctx context.Context) {
@@ -50,6 +51,11 @@ func Fetch(ctx context.Context) {
 		default:
 
 			val, err := rc.Get(redis.CacheKey)
+			if err != nil {
+				l.Error("Error fetching from Redis: ", err)
+				break
+			}
+
 			if val != "" {
 				l.Info("Reddit image fetched from cache...")
 
@@ -76,11 +82,11 @@ func Fetch(ctx context.Context) {
 					Timeout: 10 * time.Second,
 				}
 
-				response, err := httpClient.Do(request)
+				response, e := httpClient.Do(request)
 
-				if err != nil {
-					l.Error("Error fetching image from Reddit: ", err)
-					return nil, err
+				if e != nil {
+					l.Error("Error fetching image from Reddit: ", e)
+					return nil, e
 				}
 
 				if response.StatusCode != http.StatusOK {
@@ -94,6 +100,11 @@ func Fetch(ctx context.Context) {
 				return response, nil
 			})
 
+			if err != nil {
+				l.Error("Error getting latest image URL: ", err)
+				break
+			}
+
 			response, err := http.Get(latestImageVal)
 			if err != nil {
 				l.Error("Error fetching image from Reddit: ", err)
@@ -119,6 +130,11 @@ func Fetch(ctx context.Context) {
 			imageData := string(imageDataBytes)
 			resized, err := resize.Shrink(imageData, uint(size), 70)
 
+			if err != nil {
+				l.Error("Error resizing image: ", err)
+				break
+			}
+
 			err = rc.Set(redis.CacheKey, resized, 10*time.Minute)
 			if err != nil {
 				l.Warn("could not cache image")

redis/client.go

@@ -4,10 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/redis/go-redis/v9"
 	"os"
 	"strconv"
 	"time"
+
+	"github.com/redis/go-redis/v9"
 )
 
 type contextKey string

resize/resize.go

@@ -3,10 +3,11 @@ package resize
 import (
 	"bytes"
 	"fmt"
-	"github.com/nfnt/resize"
 	i "image"
 	"image/jpeg"
 	_ "image/png"
+
+	"github.com/nfnt/resize"
 )
 
 func Shrink(image string, maxSize uint, quality int) (string, error) {