implement remove refresh token

Author: tuxtux59

android/src/main/java/com/reactnativecryptr/CryptrModule.kt

@@ -104,6 +104,17 @@ class CryptrModule(reactContext: ReactApplicationContext) : ReactContextBaseJava
       }
     }
 
+    @ReactMethod(isBlockingSynchronousMethod = true)
+    fun removeRefresh(successCallback: Callback, errorCallback: Callback) {
+       val editor: SharedPreferences.Editor = this.sharedPreferences.edit();
+      editor.remove(REFRESH_TOKEN_KEY);
+      if(editor.commit()) {
+        successCallback.invoke("Refresh removed");
+      } else {
+        errorCallback.invoke("Error while removing refresh");
+      }
+    }
+
     @ReactMethod(isBlockingSynchronousMethod = true)
     fun startSecuredView(
       uri: String,

ios/Cryptr.m

@@ -62,6 +62,27 @@ - (void)openInSafari:(NSURL *)URL {
     }
 }
 
+RCT_EXPORT_METHOD(removeRefresh:(RCTResponseSenderBlock)callback
+                              errorCallback:(RCTResponseSenderBlock)errorCallback)
+{
+    NSDictionary* removeQuery = @{
+      (__bridge id)kSecClass : (__bridge id)kSecClassGenericPassword,
+      (__bridge id)kSecAttrAccount : REFRESH_TOKEN_KEY,
+      (__bridge id)kSecReturnData : (__bridge id)kCFBooleanTrue
+    };
+
+    OSStatus removeStatus = SecItemDelete((__bridge CFDictionaryRef)removeQuery);
+
+    if (removeStatus == noErr) {
+        callback(@[@"Refresh removed"]);
+    }
+
+    else {
+        NSError* error = [NSError errorWithDomain:[[NSBundle mainBundle] bundleIdentifier] code:removeStatus userInfo: nil];
+        errorCallback(@[@"An error occured while removing value"]);
+    }
+}
+
 RCT_EXPORT_METHOD(getRefresh:(RCTResponseSenderBlock)callback
                               errorCallback:(RCTResponseSenderBlock)errorCallback)
 {

src/models/Cryptr.tsx

@@ -16,6 +16,10 @@ interface CryptrInterface {
     successCallback?: (data: any) => any,
     errorCallback?: (error: any) => any
   ) => any;
+  removeRefresh: (
+    successCallback?: (data: any) => any,
+    errorCallback?: (error: any) => any
+  ) => any;
   setRefresh: (
     refreshToken: string,
     successCallback?: (data: any) => any,

src/models/CryptrProvider.tsx

@@ -164,26 +164,33 @@ const CryptrProvider: React.FC<ProviderProps> = ({
     const { revoked_at, slo_code } = json;
     if (revoked_at) {
       setUnAuthenticated();
-      if (slo_code) {
-        let sloUrl = sloAfterRevokeTokenUrl(config, slo_code);
-        if (Platform.OS === 'android') {
-          Cryptr.startSecuredView(
-            sloUrl,
-            (_data: any) => {
-              callback && callback(json);
-            },
-            (error: any) => {
-              setError(error);
-              errorCallback && errorCallback(error);
+      Cryptr.removeRefresh(
+        (_data: any) => {
+          if (slo_code) {
+            let sloUrl = sloAfterRevokeTokenUrl(config, slo_code);
+            if (Platform.OS === 'android') {
+              Cryptr.startSecuredView(
+                sloUrl,
+                (_d: any) => {
+                  callback && callback(json);
+                },
+                (error: any) => {
+                  setError(error);
+                  errorCallback && errorCallback(error);
+                }
+              );
             }
-          );
+          } else {
+            if (callback) callback(json);
+          }
+        },
+        (error: any) => {
+          errorCallback && errorCallback(error);
         }
-      } else {
-        if (callback) callback(json);
-      }
+      );
     } else {
       setUnloading();
-      if (callback) callback(json);
+      if (errorCallback) errorCallback(json);
     }
   };
 
@@ -259,7 +266,11 @@ const CryptrProvider: React.FC<ProviderProps> = ({
         }
       },
       (error: any) => {
-        setError(error);
+        dispatch({
+          type: CryptrReducerActionKind.UNAUTHENTICATED,
+          payload: { error: error },
+        });
+        errorCallback && errorCallback(error);
       }
     );
   };