feat(services): Logging

services/barcode.go

@@ -8,7 +8,6 @@ import (
 	"image/color"
 	"image/draw"
 	"image/png"
-	"log"
 	"slices"
 	"time"
 
@@ -17,6 +16,7 @@ import (
 	"github.com/boombuler/barcode/ean"
 	"github.com/boombuler/barcode/qr"
 	"github.com/redis/go-redis/v9"
+	"go.uber.org/zap"
 )
 
 type BarcodeService interface {
@@ -26,19 +26,26 @@ type BarcodeService interface {
 
 type DefaultBarcodeService struct {
 	RedisClient *redis.Client
+	Logger      *zap.SugaredLogger
 }
 
 func (b *DefaultBarcodeService) GenerateBarcode(format string, content string, width int, height int, padding int) (bytes.Buffer, error) {
 	ctx := context.Background()
+	logger := b.Logger.Named("GenerateBarcode")
 
 	if !b.IsTypeSupported(format) {
+		logger.Errorw("Unsupported barcode type", "type", format)
 		return bytes.Buffer{}, fmt.Errorf("unsupported barcode type: %s", format)
 	}
 
+	logger = logger.With("type", format, "content", content, "width", width, "height", height, "padding", padding)
+	cacheKey := fmt.Sprintf("barcode:%s:%s:%d:%d:%d", format, content, width, height, padding)
+
 	if b.RedisClient != nil {
-		cachedBarcode, err := b.RedisClient.Get(ctx, fmt.Sprintf("barcode:%s:%s:%d:%d:%d", format, content, width, height, padding)).Result()
+		logger.Debugw("Checking cache for barcode", "key", cacheKey)
+		cachedBarcode, err := b.RedisClient.Get(ctx, cacheKey).Result()
 		if err == nil {
-			log.Printf("Cache hit for barcode:%s:%s:%d:%d", format, content, width, height)
+			logger.Infow("Barcode found in cache", "key", cacheKey)
 			buf := bytes.Buffer{}
 			buf.Write([]byte(cachedBarcode))
 			return buf, nil
@@ -73,6 +80,7 @@ func (b *DefaultBarcodeService) GenerateBarcode(format string, content string, w
 	bg := image.NewRGBA(image.Rect(0, 0, width, height))
 	white := color.RGBA{255, 255, 255, 255}
 	draw.Draw(bg, bg.Bounds(), &image.Uniform{white}, image.Point{}, draw.Src)
+	logger.Debug("Created white background")
 
 	// Calculate the new size for the barcode to fit within the padding
 	newWidth := width - 2*padding
@@ -81,24 +89,32 @@ func (b *DefaultBarcodeService) GenerateBarcode(format string, content string, w
 	// Scale the barcode to the new size
 	scaledCode, err := barcode.Scale(generatedCode, newWidth, newHeight)
 	if err != nil {
+		logger.Errorw("Failed to scale barcode", "error", err)
 		return bytes.Buffer{}, err
 	}
+	logger.Debug("Scaled barcode")
 
 	// Draw the barcode on top of the white background with padding
 	draw.Draw(bg, scaledCode.Bounds().Add(image.Point{padding, padding}), scaledCode, image.Point{}, draw.Over)
+	logger.Debug("Drew barcode on background")
 
 	var buf bytes.Buffer
 	err = png.Encode(&buf, bg)
 	if err != nil {
+		logger.Errorw("Failed to encode barcode to PNG", "error", err)
 		return bytes.Buffer{}, err
 	}
+	logger.Debug("Encoded barcode to PNG")
 
 	if b.RedisClient != nil {
-		err = b.RedisClient.Set(ctx, fmt.Sprintf("barcode:%s:%s:%d:%d", format, content, width, height), buf.String(), 10*time.Minute).Err()
+		err = b.RedisClient.Set(ctx, cacheKey, buf.String(), 10*time.Minute).Err()
+		logger.Debugw("Cached barcode", "key", cacheKey)
 		if err != nil {
+			logger.Errorw("Failed to cache barcode", "error", err)
 			return bytes.Buffer{}, err
 		}
 	}
+	logger.Info("Generated barcode")
 
 	return buf, nil
 }