feat: Support WeChat iOS native third-party login.

ios/Classes/OcCasdoorFlutterSdkPlugin.h

@@ -0,0 +1,18 @@
+// Copyright 2022 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Flutter/Flutter.h>
+
+@interface CasdoorFlutterSdkPlugin : NSObject<FlutterPlugin>
+@end

ios/Classes/OcCasdoorFlutterSdkPlugin.m

@@ -0,0 +1,202 @@
+// Copyright 2022 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+#import "CasdoorFlutterSdkPlugin.h"
+#import <UIKit/UIKit.h>
+#import <WXApiObject.h>
+#import <WXApi.h>
+#import <WechatAuthSDK.h>
+@import WebKit;
+
+#define APP_ID @"wx049c70e6c2027b0b"
+#define UNIVERSAL_LINK @"https://testdomain.com"
+
+
+typedef void (^AuthResultCallback)(NSString *);
+@interface CasdoorFlutterSdkPlugin () <FlutterPlugin, WKNavigationDelegate, WXApiDelegate>
+@property (nonatomic, strong) WKWebView *webView;
+@property (nonatomic, copy) NSString *callbackURLScheme;
+@property (nonatomic, copy) AuthResultCallback authResultCallback;
+@end
+
+@implementation CasdoorFlutterSdkPlugin
+
+
+
+
++ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+    FlutterMethodChannel* channel = [FlutterMethodChannel
+                                     methodChannelWithName:@"casdoor_flutter_sdk"
+                                     binaryMessenger:[registrar messenger]];
+    CasdoorFlutterSdkPlugin* instance = [[CasdoorFlutterSdkPlugin alloc] init];
+    [registrar addMethodCallDelegate:instance channel:channel];
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        _webView = [[WKWebView alloc] init];
+        _webView.navigationDelegate = self;
+    }
+    return self;
+}
+
+- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
+    if ([call.method isEqualToString:@"authenticate"]) {
+        NSDictionary *arguments = call.arguments;
+        NSString *urlString = arguments[@"url"];
+        NSURL *url = [NSURL URLWithString:urlString];
+        NSString *callbackURLScheme = arguments[@"callbackUrlScheme"];
+
+        self.callbackURLScheme = callbackURLScheme;
+
+        __weak typeof(self) weakSelf = self;
+        self.authResultCallback = ^(NSString *authResult) {
+            result(authResult);
+        };
+
+        UIViewController *viewController = [[[UIApplication sharedApplication] delegate] window].rootViewController;
+        self.webView.frame = viewController.view.bounds;
+        self.webView.translatesAutoresizingMaskIntoConstraints = NO;
+        [viewController.view addSubview:self.webView];
+        [viewController.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|-0-[view]-0-|" options:0 metrics:nil views:@{@"view": self.webView}]];
+        [viewController.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[view]-0-|" options:0 metrics:nil views:@{@"view": self.webView}]];
+
+        NSURLRequest *req = [NSURLRequest requestWithURL:url];
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [weakSelf.webView loadRequest:req];
+        });
+    } else if ([call.method isEqualToString:@"cleanUpDanglingCalls"]) {
+        result(nil);
+    } else if ([call.method isEqualToString:@"getPlatformVersion"]) {
+        NSString *version = [NSString stringWithFormat:@"iOS %@", [[NSProcessInfo processInfo] operatingSystemVersionString]];
+        result(version);
+    } else if ([call.method isEqualToString:@"registerWXApi"]) {
+        NSDictionary *arguments = call.arguments;
+        NSString *app_id = arguments[@"app_id"];
+        NSString *universal_link = arguments[@"universal_link"];
+        // register WeChat
+        BOOL isWeChatRegistered = [WXApi registerApp:app_id universalLink:universal_link];
+        NSLog(@"Is WeChat Registered: %@",  isWeChatRegistered ? @"YES" : @"NO");
+    }else {
+        result(FlutterMethodNotImplemented);
+    }
+}
+
+- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
+    return  [WXApi handleOpenURL:url delegate:self];
+}
+
+- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
+    return [WXApi handleOpenURL:url delegate:self];
+}
+
+- (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserActivity *)userActivity restorationHandler:(void(^)(NSArray<id<UIUserActivityRestoring>> * __nullable restorableObjects))restorationHandler {
+    return [WXApi handleOpenUniversalLink:userActivity delegate:self];
+}
+
+-(void) onReq:(BaseReq*)reqonReq {
+
+}
+
+-(void) onResp:(BaseResp*)resp {
+    /*
+    enum WXErrCode {
+    WXSuccess = 0, 成功
+    WXErrCodeCommon = -1, 普通错误类型
+    WXErrCodeUserCancel = -2, 用户点击取消并返回
+    WXErrCodeSentFail = -3, 发送失败
+    WXErrCodeAuthDeny = -4, 授权失败
+    WXErrCodeUnsupport = -5, 微信不支持
+    };
+    */
+    if (resp.errCode == 0) { //Success
+        NSLog(@"Login Success.");
+        SendAuthResp *resp2 = (SendAuthResp *)resp;
+        NSLog(@"code: %@", resp2.code);
+
+    }else{ //Failed
+        NSLog(@"error %@", resp.errStr);
+        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Login failed." message:[NSString stringWithFormat:@"reason: %@", resp.errStr] preferredStyle:UIAlertControllerStyleAlert];
+
+        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancle" style:UIAlertActionStyleCancel handler:nil];
+        UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"Confirm" style:UIAlertActionStyleDefault handler:nil];
+
+        [alertController addAction:cancelAction];
+        [alertController addAction:confirmAction];
+
+        UIViewController *rootViewController = UIApplication.sharedApplication.keyWindow.rootViewController;
+        [rootViewController presentViewController:alertController animated:YES completion:nil];
+    }
+}
+
+#pragma mark - WKNavigationDelegate
+
+- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
+
+    NSURL *callbackUrl = navigationAction.request.URL;
+    if (callbackUrl.scheme && [callbackUrl.scheme isEqualToString:self.callbackURLScheme]) {
+
+        NSLog(@"callbackUrl: %@", callbackUrl);
+
+        self.authResultCallback(callbackUrl.absoluteString);
+
+        decisionHandler(WKNavigationActionPolicyCancel);
+        [webView removeFromSuperview];
+        return;
+    } else if ([navigationAction.request.URL.absoluteString containsString:@"https://open.weixin.qq.com"]) {
+
+        BOOL isInstalled = [WXApi isWXAppInstalled];
+        NSLog(@"Is WeChat Installed: %@",  isInstalled ? @"YES" : @"NO");
+        if ([WXApi isWXAppInstalled]) {
+
+            // Open the log before register, and you can troubleshoot problems based on the log later
+//            [WXApi startLogByLevel:WXLogLevelDetail logBlock:^(NSString *log) {
+//                NSLog(@"WeChatSDK: %@", log);
+//            }];
+//
+//            // Call the self-test function
+//            [WXApi checkUniversalLinkReady:^(WXULCheckStep step, WXCheckULStepResult* result) {
+//                NSLog(@"%@, %u, %@, %@", @(step), result.success, result.errorInfo, result.suggestion);
+//            }];
+
+            SendAuthReq *req = [[SendAuthReq alloc]init];
+            req.scope = @"snsapi_userinfo";
+            req.state = @"wx_oauth_authorization_state";
+            [WXApi sendReq:req completion:nil];
+
+
+            decisionHandler(WKNavigationActionPolicyCancel);
+            [webView removeFromSuperview];
+        }else{
+            // If WeChat is not installed, do nothing, use the scan code of the website to log in.
+        }
+
+        NSLog(@"Clicked on a link containing 'https://open.weixin.qq.com'");
+        return;
+    } else if ([navigationAction.request.URL.absoluteString containsString:@"https://openauth.alipay.com"]) {
+        // If we click on Alipay as a third-party login, write the implementation part here.
+//        decisionHandler(WKNavigationActionPolicyCancel);
+//        [webView removeFromSuperview];
+        NSLog(@"Clicked on a link containing 'https://openauth.alipay.com'");
+        return;
+    }
+
+    decisionHandler(WKNavigationActionPolicyAllow);
+}
+
+@end
+
+