adding validated services? patching forcad_local.py

OmCTF-2025/services/block_game/backend/utils/utils.go

@@ -0,0 +1,73 @@
+package utils
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+
+	"omctf.ru/block-game-backend/codegen/ent/level"
+	"omctf.ru/block-game-backend/codegen/ent/predicate"
+	"omctf.ru/block-game-backend/codegen/ent/user"
+	"omctf.ru/block-game-backend/db"
+)
+
+func BailInternalServerError(w http.ResponseWriter, err error) {
+	http.Error(w, "Unexpected error", http.StatusInternalServerError)
+	log.Printf("Unexpected error occured: %v\n", err)
+}
+
+func RespondWithJSON(w http.ResponseWriter, o any) {
+	data, err := json.Marshal(o)
+	if err != nil {
+		BailInternalServerError(w, err)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(data)
+}
+
+func GetJSONBody[T any](r *http.Request) (*T, error) {
+	var req T
+	err := json.NewDecoder(r.Body).Decode(&req)
+	if err != nil {
+		return nil, fmt.Errorf("invalid request body: %w", err)
+	}
+	return &req, nil
+}
+
+func MustMarshal(value any) json.RawMessage {
+	data, err := json.Marshal(value)
+	if err != nil {
+		log.Panicf("Can't marshal value %v: %s", value, err)
+	}
+	return data
+}
+
+func LevelAccessibleBy(userId int) predicate.Level {
+	return level.Or( // one of
+		level.HasOwnerWith(user.ID(userId)),          // user owns the level
+		level.HasInvitedPlayersWith(user.ID(userId)), // or user is invited to the level
+		level.VisibilityEQ(level.VisibilityPublic),   // or it's public
+	)
+}
+
+const (
+	CleanUpDelay = time.Hour * 1
+)
+
+func OccasionallyCleanUp() {
+	ticker := time.NewTicker(CleanUpDelay / 4)
+	for range ticker.C {
+		cnt, err := db.Client.Level.Delete().Where(
+			level.CreatedAtLT(time.Now().Add(-CleanUpDelay)),
+		).Exec(context.Background())
+		if err != nil {
+			log.Printf("Error during levels clean up: %s", err)
+		}
+		log.Printf("Cleaned up %d levels", cnt)
+	}
+}