refactor(scanner): make poll interval dynamic from database

- Add GetPollInterval() method to MediaScanner to read from database
- Add GetAutoScanEnabled() method to check if auto-scan is enabled
- Remove ScanPollIntervalSeconds from config (now DB-driven)
- Update NewMediaScanner signature to not require interval parameter
- Remove SCAN_POLL_INTERVAL_SECONDS from docker-compose env var

docker-compose.yml

@@ -10,7 +10,6 @@ services:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: ${DBPASS}
       COOKIE_SECURE: false # make true in production with HTTPS
-      SCAN_POLL_INTERVAL_SECONDS: 30
     volumes:
       - postgres_data:/var/lib/postgresql/data
       - ./database/schema:/docker-entrypoint-initdb.d

internal/config/config.go

@@ -19,7 +19,6 @@ type Config struct {
 	TestMode          bool
 	RateLimitEnabled  bool
 	RequestsPerMinute int
-	ScanPollIntervalSeconds int `env:"SCAN_POLL_INTERVAL_SECONDS" default:"30"`
 }
 
 func LoadConfig() *Config {
@@ -37,7 +36,6 @@ func LoadConfig() *Config {
 		TestMode:          getEnvBool("TEST_MODE", false),
 		RateLimitEnabled:  getEnvBool("RATE_LIMIT_ENABLED", true),
 		RequestsPerMinute: getEnvInt("REQUESTS_PER_MINUTE", 10),
-		ScanPollIntervalSeconds: getEnvInt("SCAN_POLL_INTERVAL_SECONDS", 30),
 	}
 }
 

internal/handlers/commonhandlers.go

@@ -16,7 +16,6 @@ type Handler struct {
 	db                *database.Queries
 	scanner           *services.MediaScanner
 	worker            *services.Worker
-	scheduler         *services.Scheduler
 	queueProcessor    *wsync.SyncQueueProcessor
 	queueCtx          context.Context
 	queueCancel       context.CancelFunc
@@ -34,7 +33,6 @@ type Handler struct {
 func NewHandler(db *database.Queries, connManager *wsync.ConnectionManager, queueProcessor *wsync.SyncQueueProcessor, cfg *config.Config) *Handler {
 	ctx, cancel := context.WithCancel(context.Background())
 	worker := services.NewWorker(3)
-	scheduler := services.NewScheduler(worker, db)
 
 	queueCtx, queueCancel := context.WithCancel(context.Background())
 
@@ -42,9 +40,8 @@ func NewHandler(db *database.Queries, connManager *wsync.ConnectionManager, queu
 
 	return &Handler{
 		db:                db,
-		scanner:           services.NewMediaScanner(db, cfg.ScanPollIntervalSeconds),
+		scanner:           services.NewMediaScanner(db),
 		worker:            worker,
-		scheduler:         scheduler,
 		queueProcessor:    queueProcessor,
 		queueCtx:          queueCtx,
 		queueCancel:       queueCancel,

internal/services/media_scanner.go

@@ -90,18 +90,12 @@ type MediaScanner struct {
 }
 
 // NewMediaScanner creates a new media scanner instance
-func NewMediaScanner(db *database.Queries, pollIntervalSeconds int) *MediaScanner {
+func NewMediaScanner(db *database.Queries) *MediaScanner {
 	watcher, err := fsnotify.NewWatcher()
 	if err != nil {
 		panic(fmt.Sprintf("Failed to create file watcher: %v", err))
 	}
 
-	pollInterval := 30 * time.Second
-
-	if pollInterval > 0 {
-		pollInterval = time.Duration(pollIntervalSeconds) * time.Second
-	}
-
 	return &MediaScanner{
 		db:               db,
 		watcher:          watcher,
@@ -111,10 +105,44 @@ func NewMediaScanner(db *database.Queries, pollIntervalSeconds int) *MediaScanne
 		libraryTypes:     make(map[string][]string),
 		logger:           NewScannerLogger(),
 		eventQueue:       make(chan string, 500),
-		pollInterval:     pollInterval,
 	}
 }
 
+func (s *MediaScanner) GetPollInterval() time.Duration {
+	if s.db == nil {
+		return 30 * time.Second
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	setting, err := s.db.GetSystemSetting(ctx, "scan_poll_interval_seconds")
+	if err != nil || setting == "" {
+		return 30 * time.Second
+	}
+	seconds, err := strconv.Atoi(setting)
+	if err != nil || seconds < 1 {
+		return 30 * time.Second
+	}
+	return time.Duration(seconds) * time.Second
+}
+
+func (s *MediaScanner) GetAutoScanEnabled() bool {
+	if s.db == nil {
+		return true // default to enabled
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	setting, err := s.db.GetSystemSetting(ctx, "auto_scan_enabled")
+	if err != nil || setting == "" {
+		return true
+	}
+	enabled, err := strconv.ParseBool(setting)
+	if err != nil {
+		return true
+	}
+	return enabled
+}
+
 func (s *MediaScanner) SetAdminID(adminID pgtype.UUID) {
 	s.adminID = adminID
 }
@@ -1654,26 +1682,32 @@ func (s *MediaScanner) handleFileDelete(ctx context.Context, filePath string) {
 }
 
 func (s *MediaScanner) StartPolling(ctx context.Context) {
-	if s.pollInterval <= 0 {
+	interval := s.GetPollInterval()
+	if interval <= 0 {
 		fmt.Println("Polling fallback disabled (interval = 0")
 		return
 	}
-	ticker := time.NewTicker(s.pollInterval)
-	defer ticker.Stop()
-	fmt.Printf("Polling fallback started with interval: %v\n", s.pollInterval)
+	fmt.Printf("Polling fallback started with interval: %v\n", interval)
+
 	for {
+		ticker := time.NewTicker(interval)
+		defer ticker.Stop()
+
 		select {
 		case <-ctx.Done():
 			fmt.Println("Polling fallback stopped")
 			return
 		case <-ticker.C:
-			fmt.Println("Running polling fallback sync...")
+			//Re-read interval each tick for dynamic updates
+			interval = s.GetPollInterval()
+			fmt.Printf("Running polling fallback sync (interval: %v)...\n", interval)
 			if err := s.SyncFilesystemWithDatabase(ctx); err != nil {
 				fmt.Printf("Polling sync error: %v\n", err)
 			}
 		}
 	}
 }
+
 func (s *MediaScanner) SyncFilesystemWithDatabase(ctx context.Context) error {
 	fmt.Println("[POLL-SYNC] Starting filesystem sync with database")
 	for _, folder := range s.folders {