add media service

internal/application/usecases/upload.go

@@ -0,0 +1,50 @@
+package usecases
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"path/filepath"
+	"time"
+
+	"lendry-erp/media/internal/application/dto"
+	"lendry-erp/media/internal/infrastructure/images"
+	"lendry-erp/media/internal/infrastructure/storage"
+)
+
+type UploadUseCase struct {
+	storage   storage.Storage
+	processor images.Processor
+}
+
+func NewUploadUseCase(s storage.Storage, p images.Processor) *UploadUseCase {
+	return &UploadUseCase{
+		storage:   s,
+		processor: p,
+	}
+}
+
+func (u *UploadUseCase) Execute(ctx context.Context, input dto.UploadMediaRequest) (*dto.UploadMediaResponse, error) {
+	// 1. Сжатие и обработка изображения
+	finalBytes, contentType, err := u.processor.Process(input.Data, input.Mode)
+	if err != nil {
+		return nil, fmt.Errorf("process image: %w", err)
+	}
+
+	// 2. Генерация уникального имени файла
+	ext := filepath.Ext(input.OriginalName)
+	if ext == "" {
+		ext = ".jpg"
+	}
+	objectName := fmt.Sprintf("%d%s", time.Now().UnixNano(), ext)
+
+	// 3. Загрузка потока байтов в MinIO
+	if err := u.storage.UploadStream(ctx, objectName, bytes.NewReader(finalBytes), contentType); err != nil {
+		return nil, fmt.Errorf("upload to storage: %w", err)
+	}
+
+	return &dto.UploadMediaResponse{
+		FileName: objectName,
+		Size:     int64(len(finalBytes)),
+	}, nil
+}