feat(barcode): Implement cache

services/barcode.go

@@ -2,9 +2,12 @@ package services
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"image/png"
+	"log"
 	"slices"
+	"time"
 
 	"github.com/boombuler/barcode"
 	"github.com/boombuler/barcode/code128"
@@ -23,10 +26,22 @@ type DefaultBarcodeService struct {
 }
 
 func (b *DefaultBarcodeService) GenerateBarcode(format string, content string, width int, height int) (bytes.Buffer, error) {
+	ctx := context.Background()
+
 	if !b.IsTypeSupported(format) {
 		return bytes.Buffer{}, fmt.Errorf("unsupported barcode type: %s", format)
 	}
 
+	if b.RedisClient != nil {
+		cachedBarcode, err := b.RedisClient.Get(ctx, fmt.Sprintf("barcode:%s:%s:%d:%d", format, content, width, height)).Result()
+		if err == nil {
+			log.Printf("Cache hit for barcode:%s:%s:%d:%d", format, content, width, height)
+			buf := bytes.Buffer{}
+			buf.Write([]byte(cachedBarcode))
+			return buf, nil
+		}
+	}
+
 	var generatedCode barcode.Barcode
 	var err error
 
@@ -62,6 +77,13 @@ func (b *DefaultBarcodeService) GenerateBarcode(format string, content string, w
 		return bytes.Buffer{}, err
 	}
 
+	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()
+		if err != nil {
+			return bytes.Buffer{}, err
+		}
+	}
+
 	return buf, nil
 }