Anmeldung und Kalendar

src/services/biometrics.ts

@@ -0,0 +1,66 @@
+import * as LocalAuthentication from "expo-local-authentication";
+
+class BiometricsService {
+  async isBiometricSupported(): Promise<boolean> {
+    try {
+      const compatible = await LocalAuthentication.hasHardwareAsync();
+      const enrolled = await LocalAuthentication.isEnrolledAsync();
+      return compatible && enrolled;
+    } catch (error) {
+      console.error("Biometric support check failed:", error);
+      return false;
+    }
+  }
+
+  async getBiometricType(): Promise<LocalAuthentication.AuthenticationType[]> {
+    try {
+      const types =
+        await LocalAuthentication.supportedAuthenticationTypesAsync();
+      return types;
+    } catch (error) {
+      console.error("Get biometric type failed:", error);
+      return [];
+    }
+  }
+
+  async authenticateWithBiometrics(): Promise<boolean> {
+    try {
+      const biometryType = await this.isBiometricSupported();
+
+      if (!biometryType) {
+        throw new Error("Biometric authentication not supported");
+      }
+
+      const result = await LocalAuthentication.authenticateAsync({
+        promptMessage: "Biometrische Authentifizierung",
+        cancelLabel: "Abbrechen",
+        fallbackLabel: "Passcode verwenden",
+        requireConfirmation: true,
+      });
+
+      return result.success;
+    } catch (error) {
+      console.error("Biometric authentication failed:", error);
+      return false;
+    }
+  }
+
+  async showBiometricPrompt(
+    reason: string = "Für sicheren Zugang authentifizieren"
+  ): Promise<boolean> {
+    try {
+      const isSupported = await this.isBiometricSupported();
+
+      if (!isSupported) {
+        throw new Error("Biometric authentication not available");
+      }
+
+      return await this.authenticateWithBiometrics();
+    } catch (error) {
+      console.error("Biometric prompt failed:", error);
+      return false;
+    }
+  }
+}
+
+export default new BiometricsService();