feat:#10 added new minimal backend

datamanager/backend/core/app.go

@@ -0,0 +1,55 @@
+package core
+
+import (
+	"datamanager/backend/dbx"
+	"datamanager/backend/tools/hook"
+)
+
+type App interface {
+	// DB returns the default app database instance.
+	DB() *dbx.DB
+	OnTerminate() *hook.Hook[*TerminateEvent]
+	ResetBootstrapState() error
+}
+
+func NewBaseApp(config BaseAppConfig) App {
+
+	app := &BaseApp{
+		isDev:       config.IsDev,
+		dataDir:     config.DataDir,
+		db:          *dbx.NewDB("neo4j", "password"),
+		onTerminate: &hook.Hook[*TerminateEvent]{},
+	}
+	return app
+}
+
+type BaseApp struct {
+	// configurable parameters
+	isDev       bool
+	dataDir     string
+	db          dbx.DB
+	onTerminate *hook.Hook[*TerminateEvent]
+}
+
+func (app *BaseApp) DB() *dbx.DB {
+	db := app.db
+
+	return &db
+}
+
+func (app *BaseApp) ResetBootstrapState() error {
+
+	if app.DB() != nil {
+		if err := app.db.Close(); err != nil {
+			return err
+		}
+	}
+
+	// replace the db instance with nil
+	app.db = dbx.DB{}
+	return nil
+}
+
+func (app *BaseApp) OnTerminate() *hook.Hook[*TerminateEvent] {
+	return app.onTerminate
+}