Add FaceID support

Author: dms

android/src/main/java/com/hieuvp/fingerprint/ReactNativeFingerprintScannerModule.java

@@ -111,7 +111,7 @@ public void isSensorAvailable(final Promise promise) {
         if (errorMessage != null) {
             promise.reject(errorMessage, errorMessage);
         } else {
-            promise.resolve(true);
+            promise.resolve("Fingerprint");
         }
     }
 }

ios/ReactNativeFingerprintScanner.h

@@ -3,7 +3,8 @@
 #else // React Native < 0.40
 #import "RCTBridgeModule.h"
 #endif
+#import <LocalAuthentication/LocalAuthentication.h>
 
 @interface ReactNativeFingerprintScanner : NSObject <RCTBridgeModule>
-
+	- (NSString *_Nonnull)getBiometryType:(LAContext *_Nonnull)context;
 @end

ios/ReactNativeFingerprintScanner.m

@@ -6,8 +6,6 @@
 #import "RCTUtils.h"
 #endif
 
-#import <LocalAuthentication/LocalAuthentication.h>
-
 @implementation ReactNativeFingerprintScanner
 
 RCT_EXPORT_MODULE();
@@ -18,7 +16,7 @@ @implementation ReactNativeFingerprintScanner
     NSError *error;
 
     if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {
-        callback(@[[NSNull null], @true]);
+        callback(@[[NSNull null], [self getBiometryType:context]]);
     } else {
         NSString *errorReason;
 
@@ -118,4 +116,13 @@ @implementation ReactNativeFingerprintScanner
     }
 }
 
+- (NSString *)getBiometryType:(LAContext *)context
+{
+    if (@available(iOS 11, *)) {
+        return context.biometryType == LABiometryTypeFaceID ? @"Face ID" : @"Touch ID";
+    }
+
+    return @"Touch ID";
+}
+
 @end

src/isSensorAvailable.android.js

@@ -6,7 +6,7 @@ const { ReactNativeFingerprintScanner } = NativeModules;
 export default () => {
   return new Promise((resolve, reject) => {
     ReactNativeFingerprintScanner.isSensorAvailable()
-      .then(() => resolve(true))
+      .then((biometryType) => resolve(biometryType))
       .catch(error => reject(createError(error.message)));
   });
 }

src/isSensorAvailable.ios.js

@@ -5,9 +5,9 @@ const { ReactNativeFingerprintScanner } = NativeModules;
 
 export default () => {
   return new Promise((resolve, reject) => {
-    ReactNativeFingerprintScanner.isSensorAvailable(error => {
+    ReactNativeFingerprintScanner.isSensorAvailable((error, biometryType) => {
       if (error) return reject(createError(error.message));
-      resolve(true);
+      resolve(biometryType);
     });
   });
 }