FEAT: Initial Upload Page

cms/internal/services/s3.go

@@ -0,0 +1,48 @@
+package services
+
+import (
+	"context"
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/service/s3"
+)
+
+var S3Client S3
+
+type S3 interface {
+	GetPresignedURL(ctx context.Context, key, contentType string, expiry time.Duration) (string, error)
+	DoesFileExist(ctx context.Context, key string) (bool, error)
+}
+
+type S3Concrete struct {
+	S3Client *s3.Client
+	Bucket   string
+}
+
+func (svc S3Concrete) GetPresignedURL(ctx context.Context, key, contentType string, expiry time.Duration) (string, error) {
+	presignClient := s3.NewPresignClient(svc.S3Client)
+
+	request, err := presignClient.PresignPutObject(ctx, &s3.PutObjectInput{
+		Bucket:      &svc.Bucket,
+		Key:         &key,
+		ContentType: &contentType,
+	}, s3.WithPresignExpires(expiry))
+	if err != nil {
+		return "", err
+	}
+
+	return request.URL, nil
+}
+
+func (svc S3Concrete) DoesFileExist(ctx context.Context, key string) (bool, error) {
+	_, error := svc.S3Client.HeadObject(ctx, &s3.HeadObjectInput{
+		Bucket: &svc.Bucket,
+		Key:    &key,
+	})
+
+	if error != nil {
+		return false, error
+	}
+
+	return true, nil
+}