Bootstrap copied BFF and local accounts with public Sendico contracts (#34)

backend/pkg/db/connection.go

@@ -0,0 +1,59 @@
+package db
+
+import (
+	"context"
+
+	mongoimpl "git.sendico.io/tech/sxchnge/bff/pkg/db/internal/mongo"
+	"git.sendico.io/tech/sxchnge/bff/pkg/merrors"
+	"git.sendico.io/tech/sxchnge/bff/pkg/mlogger"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/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   *mongo.Client
+	database string
+}
+
+func (c *MongoConnection) Client() *mongo.Client {
+	return c.client
+}
+
+func (c *MongoConnection) Database() *mongo.Database {
+	return c.client.Database(c.database)
+}
+
+func (c *MongoConnection) Disconnect(ctx context.Context) error {
+	return c.client.Disconnect(ctx)
+}
+
+func (c *MongoConnection) Ping(ctx context.Context) error {
+	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", "config")
+	}
+	if config.Driver != Mongo {
+		return nil, merrors.InvalidArgument("unsupported database driver: "+string(config.Driver), "config.driver")
+	}
+
+	client, _, settings, err := mongoimpl.ConnectClient(logger, config.Settings)
+	if err != nil {
+		return nil, err
+	}
+
+	return &MongoConnection{
+		client:   client,
+		database: settings.Database,
+	}, nil
+}