Initialize Schnappix Photo Booth application with custom UVC camera, silent Wi-Fi IPP printing, local gallery storage, and kiosk screen pinning support

src/services/settings.ts

@@ -0,0 +1,48 @@
+import * as FileSystem from 'expo-file-system';
+
+export interface AppSettings {
+  countdownDuration: number; // in seconds
+  printerIp: string;
+  adminPassword: string;
+  kioskModeEnabled: boolean;
+}
+
+const SETTINGS_FILE = `${FileSystem.documentDirectory}settings.json`;
+
+const DEFAULT_SETTINGS: AppSettings = {
+  countdownDuration: 3,
+  printerIp: '192.168.1.100',
+  adminPassword: '1234',
+  kioskModeEnabled: false,
+};
+
+/**
+ * Load settings from persistent storage.
+ */
+export async function loadSettings(): Promise<AppSettings> {
+  try {
+    const fileInfo = await FileSystem.getInfoAsync(SETTINGS_FILE);
+    if (fileInfo.exists) {
+      const content = await FileSystem.readAsStringAsync(SETTINGS_FILE);
+      const parsed = JSON.parse(content);
+      return { ...DEFAULT_SETTINGS, ...parsed };
+    }
+  } catch (e) {
+    console.error('Failed to load settings, using defaults:', e);
+  }
+  return DEFAULT_SETTINGS;
+}
+
+/**
+ * Save settings to persistent storage.
+ */
+export async function saveSettings(settings: AppSettings): Promise<void> {
+  try {
+    const content = JSON.stringify(settings, null, 2);
+    await FileSystem.writeAsStringAsync(SETTINGS_FILE, content);
+    console.log('Settings saved successfully:', content);
+  } catch (e) {
+    console.error('Failed to save settings:', e);
+    throw e;
+  }
+}