Implement saving and loading for account data, currently a basic json file

pkg/server/server.go

@@ -6,37 +6,84 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/mdiluz/rove/pkg/accounts"
 	"github.com/mdiluz/rove/pkg/game"
 )
 
+const (
+	// PersistentData will allow the server to load and save it's state
+	PersistentData = iota
+
+	// EphemeralData will let the server neither load or save out any of it's data
+	EphemeralData
+)
+
 // Server contains the relevant data to run a game server
 type Server struct {
 	port int
 
-	accountant *Accountant
+	accountant *accounts.Accountant
 	world      *game.World
 
 	router *mux.Router
+
+	persistence int
 }
 
-// NewServer sets up a new server
-func NewServer(port int) *Server {
-	return &Server{
-		port:       port,
-		accountant: NewAccountant(),
-		world:      game.NewWorld(),
+// ServerOption defines a server creation option
+type ServerOption func(s *Server)
+
+// OptionPort sets the server port for hosting
+func OptionPort(port int) ServerOption {
+	return func(s *Server) {
+		s.port = port
 	}
 }
 
+// OptionPersistentData sets the server data to be persistent
+func OptionPersistentData() ServerOption {
+	return func(s *Server) {
+		s.persistence = PersistentData
+	}
+}
+
+// NewServer sets up a new server
+func NewServer(opts ...ServerOption) *Server {
+
+	// Set up the default server
+	s := &Server{
+		port:        8080,
+		accountant:  accounts.NewAccountant(),
+		world:       game.NewWorld(),
+		persistence: EphemeralData,
+	}
+
+	// Apply all options
+	for _, o := range opts {
+		o(s)
+	}
+
+	return s
+}
+
 // Initialise sets up internal state ready to serve
-func (s *Server) Initialise() {
+func (s *Server) Initialise() error {
 	// Set up the world
 	s.world = game.NewWorld()
 	fmt.Printf("World created\n\t%+v\n", s.world)
 
+	// Load the accounts if requested
+	if s.persistence == PersistentData {
+		if err := s.accountant.Load(); err != nil {
+			return err
+		}
+	}
+
 	// Create a new router
 	s.SetUpRouter()
 	fmt.Printf("Routes Created\n")
+
+	return nil
 }
 
 // Run executes the server
@@ -47,3 +94,15 @@ func (s *Server) Run() {
 		log.Fatal(err)
 	}
 }
+
+// Close closes up the server
+func (s *Server) Close() error {
+
+	// Save the accounts if requested
+	if s.persistence == PersistentData {
+		if err := s.accountant.Save(); err != nil {
+			return err
+		}
+	}
+	return nil
+}