feat: implement server persistence with services.json

cmd/server/main.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"os"
 	"sync"
 	"time"
 
@@ -12,17 +13,25 @@ import (
 )
 
 var (
-	services = []models.Service{
-		{Name: "auth-service"},
-		{Name: "payments-api"},
-		{Name: "user-db"},
-		{Name: "notifications"},
-		{Name: "front-web"},
-	}
-	mu sync.Mutex
+	services = []models.Service{}
+	mu       sync.Mutex
+	dataFile = "services.json"
 )
 
 func main() {
+	if err := loadServices(); err != nil {
+		log.Printf("⚠️ No se pudo cargar services.json, usando defaults: %v", err)
+		services = []models.Service{
+			{Name: "auth-service"},
+			{Name: "payments-api"},
+			{Name: "user-db"},
+			{Name: "notifications"},
+			{Name: "front-web"},
+		}
+	} else {
+		fmt.Printf("✅ %d servicios cargados desde disco\n", len(services))
+	}
+
 	http.HandleFunc("/services", handleServices)
 	http.HandleFunc("/lock", handleLock)
 	http.HandleFunc("/unlock", handleUnlock)
@@ -33,6 +42,27 @@ func main() {
 	}
 }
 
+func loadServices() error {
+	file, err := os.Open(dataFile)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	return json.NewDecoder(file).Decode(&services)
+}
+
+func saveServices() error {
+	file, err := os.Create(dataFile)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	encoder := json.NewEncoder(file)
+	encoder.SetIndent("", "  ")
+	return encoder.Encode(services)
+}
+
 func handleServices(w http.ResponseWriter, r *http.Request) {
 	mu.Lock()
 	defer mu.Unlock()
@@ -66,6 +96,10 @@ func handleLock(w http.ResponseWriter, r *http.Request) {
 			services[i].LockedBy = req.User
 			services[i].LockedAt = time.Now()
 
+			if err := saveServices(); err != nil {
+				log.Printf("Error guardando estado: %v", err)
+			}
+
 			w.WriteHeader(http.StatusOK)
 			return
 		}
@@ -103,6 +137,10 @@ func handleUnlock(w http.ResponseWriter, r *http.Request) {
 			services[i].LockedBy = ""
 			services[i].LockedAt = time.Time{}
 
+			if err := saveServices(); err != nil {
+				log.Printf("Error guardando estado: %v", err)
+			}
+
 			w.WriteHeader(http.StatusOK)
 			return
 		}