Add macOS OAuth browser support and platform integration (#241)

Author: 0xFirekeeper

Assets/Thirdweb/Plugins/macOS.meta

@@ -0,0 +1,106 @@
+#import <Cocoa/Cocoa.h>
+#import <AuthenticationServices/AuthenticationServices.h>
+
+#include "../iOS/Common.h"
+
+typedef void (*ASWebAuthenticationSessionCompletionCallback)(void* sessionPtr, const char* callbackUrl, int errorCode, const char* errorMessage);
+
+@interface Thirdweb_ASWebAuthenticationSession : NSObject<ASWebAuthenticationPresentationContextProviding>
+
+@property (readonly, nonatomic) ASWebAuthenticationSession* session;
+
+@end
+
+@implementation Thirdweb_ASWebAuthenticationSession
+
+- (instancetype)initWithURL:(NSURL *)URL callbackURLScheme:(nullable NSString *)callbackURLScheme completionCallback:(ASWebAuthenticationSessionCompletionCallback)completionCallback
+{
+    self = [super init];
+    if (self)
+    {
+        _session = [[ASWebAuthenticationSession alloc] initWithURL:URL
+                                                callbackURLScheme:callbackURLScheme
+                                                completionHandler:^(NSURL * _Nullable callbackURL, NSError * _Nullable error)
+        {
+            if (error != nil)
+            {
+                NSLog(@"[ASWebAuthenticationSession:CompletionHandler] %@", error.description);
+            }
+
+            completionCallback((__bridge void*)self, toString(callbackURL.absoluteString), (int)error.code, toString(error.localizedDescription));
+        }];
+
+        if (@available(macOS 10.15, *))
+        {
+            _session.presentationContextProvider = self;
+        }
+    }
+    return self;
+}
+
+- (ASPresentationAnchor)presentationAnchorForWebAuthenticationSession:(ASWebAuthenticationSession *)session
+{
+    if (@available(macOS 10.15, *))
+    {
+        NSWindow* anchor = [NSApplication sharedApplication].keyWindow;
+        if (anchor == nil)
+        {
+            anchor = [NSApplication sharedApplication].mainWindow;
+        }
+        if (anchor == nil)
+        {
+            anchor = [NSApplication sharedApplication].windows.firstObject;
+        }
+        return anchor;
+    }
+    return nil;
+}
+
+@end
+
+extern "C"
+{
+    Thirdweb_ASWebAuthenticationSession* Thirdweb_ASWebAuthenticationSession_InitWithURL(
+        const char* urlStr, const char* urlSchemeStr, ASWebAuthenticationSessionCompletionCallback completionCallback)
+    {
+        NSURL* url = [NSURL URLWithString: toString(urlStr)];
+        NSString* urlScheme = toString(urlSchemeStr);
+
+        Thirdweb_ASWebAuthenticationSession* session = [[Thirdweb_ASWebAuthenticationSession alloc] initWithURL:url
+                                                                            callbackURLScheme:urlScheme
+                                                                            completionCallback:completionCallback];
+        return session;
+    }
+
+    int Thirdweb_ASWebAuthenticationSession_Start(void* sessionPtr)
+    {
+        Thirdweb_ASWebAuthenticationSession* session = (__bridge Thirdweb_ASWebAuthenticationSession*) sessionPtr;
+        BOOL started = [[session session] start];
+        return toBool(started);
+    }
+
+    void Thirdweb_ASWebAuthenticationSession_Cancel(void* sessionPtr)
+    {
+        Thirdweb_ASWebAuthenticationSession* session = (__bridge Thirdweb_ASWebAuthenticationSession*) sessionPtr;
+        [[session session] cancel];
+    }
+
+    int Thirdweb_ASWebAuthenticationSession_GetPrefersEphemeralWebBrowserSession(void* sessionPtr)
+    {
+        Thirdweb_ASWebAuthenticationSession* session = (__bridge Thirdweb_ASWebAuthenticationSession*) sessionPtr;
+        if (@available(macOS 10.15, *))
+        {
+            return toBool([[session session] prefersEphemeralWebBrowserSession]);
+        }
+        return 0;
+    }
+
+    void Thirdweb_ASWebAuthenticationSession_SetPrefersEphemeralWebBrowserSession(void* sessionPtr, int enable)
+    {
+        Thirdweb_ASWebAuthenticationSession* session = (__bridge Thirdweb_ASWebAuthenticationSession*) sessionPtr;
+        if (@available(macOS 10.15, *))
+        {
+            [[session session] setPrefersEphemeralWebBrowserSession:toBool(enable)];
+        }
+    }
+}

Assets/Thirdweb/Plugins/macOS/MacBrowser.mm

@@ -0,0 +1,17 @@
+# macOS OAuth Plugin
+
+The native bridge in this folder (`libMacBrowser.dylib`) is a universal binary (arm64 + x86_64) built from `MacBrowser.mm`.
+
+## Rebuild steps
+
+Run these commands from the repository root on macOS:
+
+```bash
+cd Assets/Thirdweb/Plugins/macOS
+clang++ -std=c++17 -ObjC++ -fmodules -Wall -Werror -arch arm64 -framework Cocoa -framework AuthenticationServices -dynamiclib MacBrowser.mm -o /tmp/libMacBrowser_arm64.dylib
+clang++ -std=c++17 -ObjC++ -fmodules -Wall -Werror -arch x86_64 -framework Cocoa -framework AuthenticationServices -dynamiclib MacBrowser.mm -o /tmp/libMacBrowser_x86_64.dylib
+lipo -create /tmp/libMacBrowser_arm64.dylib /tmp/libMacBrowser_x86_64.dylib -output libMacBrowser.dylib
+rm /tmp/libMacBrowser_arm64.dylib /tmp/libMacBrowser_x86_64.dylib
+```
+
+After rebuilding, re-run your Unity macOS build to make sure the new binary is picked up.

Assets/Thirdweb/Plugins/macOS/MacBrowser.mm.meta

@@ -37,6 +37,8 @@ public CrossPlatformUnityBrowser(string htmlOverride = null)
             _unityBrowser = new AndroidBrowser();
 #elif UNITY_IOS
             _unityBrowser = new IOSBrowser();
+#elif UNITY_STANDALONE_OSX
+            _unityBrowser = new MacBrowser();
 #else
             _unityBrowser = new InAppWalletBrowser(htmlOverride);
 #endif