billing docs service

api/billing/documents/internal/docstore/store.go

@@ -0,0 +1,67 @@
+package docstore
+
+import (
+	"context"
+	"strings"
+
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+)
+
+// Driver identifies the document storage backend.
+type Driver string
+
+const (
+	DriverLocal Driver = "local_fs"
+	DriverS3    Driver = "s3"
+	DriverMinio Driver = "minio"
+)
+
+// Config configures the document storage backend.
+type Config struct {
+	Driver Driver       `yaml:"driver"`
+	Local  *LocalConfig `yaml:"local"`
+	S3     *S3Config    `yaml:"s3"`
+}
+
+// LocalConfig configures local filesystem storage.
+type LocalConfig struct {
+	RootPath string `yaml:"root_path"`
+}
+
+// S3Config configures S3/Minio storage.
+type S3Config struct {
+	Endpoint        string `yaml:"endpoint"`
+	Region          string `yaml:"region"`
+	Bucket          string `yaml:"bucket"`
+	AccessKeyEnv    string `yaml:"access_key_env"`
+	SecretKeyEnv    string `yaml:"secret_access_key_env"`
+	AccessKey       string `yaml:"access_key"`
+	SecretAccessKey string `yaml:"secret_access_key"`
+	UseSSL          bool   `yaml:"use_ssl"`
+	ForcePathStyle  bool   `yaml:"force_path_style"`
+}
+
+// Store defines storage operations for generated documents.
+type Store interface {
+	Save(ctx context.Context, key string, data []byte) error
+	Load(ctx context.Context, key string) ([]byte, error)
+}
+
+// New creates a document store based on config.
+func New(logger mlogger.Logger, cfg Config) (Store, error) {
+	switch strings.ToLower(string(cfg.Driver)) {
+	case string(DriverLocal):
+		if cfg.Local == nil {
+			return nil, merrors.InvalidArgument("docstore: local config missing")
+		}
+		return NewLocalStore(logger, *cfg.Local)
+	case string(DriverS3), string(DriverMinio):
+		if cfg.S3 == nil {
+			return nil, merrors.InvalidArgument("docstore: s3 config missing")
+		}
+		return NewS3Store(logger, *cfg.S3)
+	default:
+		return nil, merrors.InvalidArgument("docstore: unsupported driver")
+	}
+}