add method to return collection name and refactor database validator

gomongo/collection.go

@@ -55,14 +55,16 @@ type Collection[T any] interface {
 	ListIndexes(ctx context.Context) ([]Index, error)
 
 	Drop(ctx context.Context) error
+
+	Name() string
 }
 
 type collection[T any] struct {
 	mongoCollection *mongo.Collection
 }
 
 func NewCollection[T any](database *Database, collectionName string) (Collection[T], error) {
-	if database == nil || database.mongoDatabase == nil {
+	if err := validateDatabase(database); err != nil {
 		return nil, ErrConnectionNotInitialized
 	}
 
@@ -196,6 +198,11 @@ func (c *collection[T]) Drop(ctx context.Context) error {
 	return drop(ctx, c.mongoCollection)
 }
 
+// Name returns the name of a collection
+func (c *collection[T]) Name() string {
+	return c.mongoCollection.Name()
+}
+
 func validateReceivedID(id ID) error {
 	if id == nil {
 		return ErrEmptyID

gomongo/database.go

@@ -61,3 +61,11 @@ func pingMongoServer(cs *ConnectionSettings, mongoClient *mongo.Client, ctx cont
 
 	return mongoClient.Ping(ctx, nil)
 }
+
+func validateDatabase(database *Database) error {
+	if database == nil || database.mongoDatabase == nil {
+		return ErrConnectionNotInitialized
+	}
+
+	return nil
+}