add scanning

src/lib/app-settings.ts

@@ -0,0 +1,38 @@
+import { getDb } from './db'
+
+interface ScanConfig {
+  schedule: string
+  enabled: boolean
+  lastScanAt: number | null
+}
+
+function getSetting(key: string): string | null {
+  const db = getDb()
+  const row = db
+    .prepare('SELECT value FROM app_settings WHERE key = ?')
+    .get(key) as { value: string } | undefined
+  return row?.value ?? null
+}
+
+function setSetting(key: string, value: string): void {
+  const db = getDb()
+  db.prepare('INSERT OR REPLACE INTO app_settings (key, value) VALUES (?, ?)').run(key, value)
+}
+
+export function getScanConfig(): ScanConfig {
+  const schedule = getSetting('scan_schedule') ?? '0 * * * *'
+  const enabled = getSetting('scan_enabled') !== 'false'
+  const lastRanRaw = getSetting('scan_last_ran')
+  const lastScanAt =
+    lastRanRaw && lastRanRaw.length > 0 ? parseInt(lastRanRaw, 10) : null
+  return { schedule, enabled, lastScanAt }
+}
+
+export function updateScanConfig(schedule: string, enabled: boolean): void {
+  setSetting('scan_schedule', schedule)
+  setSetting('scan_enabled', enabled ? 'true' : 'false')
+}
+
+export function setScanLastRan(ts: number): void {
+  setSetting('scan_last_ran', String(ts))
+}