service backend

api/pkg/db/connection.go

@@ -0,0 +1,65 @@
+package db
+
+import (
+	"context"
+
+	mongoimpl "github.com/tech/sendico/pkg/db/internal/mongo"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	mongoDriver "go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/readpref"
+)
+
+// Connection represents a low-level database connection lifecycle.
+type Connection interface {
+	Disconnect(ctx context.Context) error
+	Ping(ctx context.Context) error
+}
+
+// MongoConnection provides direct access to the underlying mongo client.
+type MongoConnection struct {
+	client   *mongoDriver.Client
+	database string
+}
+
+func (c *MongoConnection) Client() *mongoDriver.Client {
+	return c.client
+}
+
+func (c *MongoConnection) Database() *mongoDriver.Database {
+	return c.client.Database(c.database)
+}
+
+func (c *MongoConnection) Disconnect(ctx context.Context) error {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	return c.client.Disconnect(ctx)
+}
+
+func (c *MongoConnection) Ping(ctx context.Context) error {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	return c.client.Ping(ctx, readpref.Primary())
+}
+
+// ConnectMongo returns a low-level MongoDB connection without constructing repositories.
+func ConnectMongo(logger mlogger.Logger, config *Config) (*MongoConnection, error) {
+	if config == nil {
+		return nil, merrors.InvalidArgument("database configuration is nil")
+	}
+	if config.Driver != Mongo {
+		return nil, merrors.InvalidArgument("unsupported database driver: " + string(config.Driver))
+	}
+
+	client, _, settings, err := mongoimpl.ConnectClient(logger, config.Settings)
+	if err != nil {
+		return nil, err
+	}
+
+	return &MongoConnection{
+		client:   client,
+		database: settings.Database,
+	}, nil
+}