fix serverAuthCode in ios

Author: Thaina

.gitignore

@@ -1,6 +1,7 @@
+**/.DS_Store
+
 .gradle/
 .idea/
-.vscode/
 bin/
 build/
 *.iml

.vscode/settings.json

@@ -0,0 +1,55 @@
+{
+    "files.exclude": {
+        "**/.DS_Store": true,
+        "**/.git": true,
+        "**/.gitmodules": true,
+        "**/*.booproj": true,
+        "**/*.pidb": true,
+        "**/*.suo": true,
+        "**/*.user": true,
+        "**/*.userprefs": true,
+        "**/*.unityproj": true,
+        "**/*.dll": true,
+        "**/*.exe": true,
+        "**/*.pdf": true,
+        "**/*.mid": true,
+        "**/*.midi": true,
+        "**/*.wav": true,
+        "**/*.gif": true,
+        "**/*.ico": true,
+        "**/*.jpg": true,
+        "**/*.jpeg": true,
+        "**/*.png": true,
+        "**/*.psd": true,
+        "**/*.tga": true,
+        "**/*.tif": true,
+        "**/*.tiff": true,
+        "**/*.3ds": true,
+        "**/*.3DS": true,
+        "**/*.fbx": true,
+        "**/*.FBX": true,
+        "**/*.lxo": true,
+        "**/*.LXO": true,
+        "**/*.ma": true,
+        "**/*.MA": true,
+        "**/*.obj": true,
+        "**/*.OBJ": true,
+        "**/*.asset": true,
+        "**/*.cubemap": true,
+        "**/*.flare": true,
+        "**/*.mat": true,
+        "**/*.meta": true,
+        "**/*.prefab": true,
+        "**/*.unity": true,
+        "build/": true,
+        "Build/": true,
+        "Library/": true,
+        "library/": true,
+        "obj/": true,
+        "Obj/": true,
+        "ProjectSettings/": true,
+        "temp/": true,
+        "Temp/": true
+    },
+    "dotnet.defaultSolution": "TestGoogleSignIn.sln"
+}

Editor.meta

@@ -0,0 +1,21 @@
+#if UNITY_EDITOR
+using System.IO;
+
+using UnityEngine;
+
+using UnityEditor.AssetImporters;
+
+[ScriptedImporter(1, "plist")]
+public class PListImporter : ScriptedImporter
+{
+	public override void OnImportAsset(AssetImportContext ctx)
+	{
+		if(ctx.mainObject is TextAsset)
+			return;
+
+		var subAsset = new TextAsset(File.ReadAllText(ctx.assetPath));
+		ctx.AddObjectToAsset("text", subAsset);
+		ctx.SetMainObject(subAsset);
+	}
+}
+#endif

Editor/iOS.meta

@@ -0,0 +1,67 @@
+#if UNITY_EDITOR
+using UnityEngine;
+
+using UnityEditor;
+using UnityEditor.iOS.Xcode;
+
+using UnityEditor.Build;
+using UnityEditor.Build.Reporting;
+
+using System;
+using System.IO;
+using System.Linq;
+using System.Collections.Generic;
+
+public class PListProcessor : IPostprocessBuildWithReport
+{
+    public int callbackOrder => 99999;
+
+    public void OnPostprocessBuild(BuildReport report)
+    {
+#if UNITY_IOS
+		string projectBundleId = PlayerSettings.GetApplicationIdentifier(BuildTargetGroup.iOS);
+		var plistFiles = AssetDatabase.FindAssets("glob:\"**/*.plist\"").Select((guid) => {
+			var doc = new PlistDocument();
+			doc.ReadFromFile(AssetDatabase.GUIDToAssetPath(guid));
+			return doc;
+		}).Where((doc) => {
+			return doc.root.values.TryGetValue("BUNDLE_ID",out var element) && element.AsString() == projectBundleId;
+		}).ToArray();
+
+		if(!(plistFiles?.Length > 0))
+			return;
+
+		var google = plistFiles.FirstOrDefault();
+
+		if(!(google.root.values.TryGetValue("CLIENT_ID",out var CLIENT_ID) && CLIENT_ID?.AsString() is string clientID && clientID.EndsWith("googleusercontent.com")))
+			throw new KeyNotFoundException("CLIENT_ID");
+		if(!(google.root.values.TryGetValue("REVERSED_CLIENT_ID",out var REVERSED_CLIENT_ID) && REVERSED_CLIENT_ID?.AsString() is string reversedClientID && reversedClientID.StartsWith("com.googleusercontent")))
+			throw new KeyNotFoundException("REVERSED_CLIENT_ID");
+
+		string plistPath = Path.Combine( report.summary.outputPath, "Info.plist" );
+
+		var info = new PlistDocument();
+		info.ReadFromFile(plistPath);
+
+		info.root.SetString("GIDClientID",clientID);
+		var CFBundleURLTypes = (info.root.values.TryGetValue("CFBundleURLTypes",out var element) ? element.AsArray() : null) ?? info.root.CreateArray("CFBundleURLTypes");
+		if(!(CFBundleURLTypes?.values?.Count > 0 && CFBundleURLTypes.values.OfType<PlistElementDict>().Select((dict) => dict.values.TryGetValue("CFBundleURLSchemes",out var value) ? value?.AsArray() : null).OfType<PlistElementArray>().SelectMany((array) => array.values).Any((item) => item?.AsString() == reversedClientID)))
+		{
+			var dict = CFBundleURLTypes.AddDict();
+			dict.SetString("CFBundleTypeRole","Editor");
+			dict.CreateArray("CFBundleURLSchemes").AddString(reversedClientID);
+		}
+
+		if(google.root.values.TryGetValue("WEB_CLIENT_ID",out var WEB_CLIENT_ID) && WEB_CLIENT_ID?.AsString() is string webClientID && !string.IsNullOrWhiteSpace(webClientID))
+		{
+			if(webClientID.EndsWith("googleusercontent.com"))
+				info.root.SetString("GIDServerClientID",webClientID);
+			else throw new ArgumentException("WebClientID");
+		}
+
+		info.WriteToFile(plistPath);
+#endif
+    }
+}
+
+#endif

Editor/iOS/PListImporter.cs

@@ -34,7 +34,8 @@ internal NativeFuture(IntPtr ptr) : base(ptr) {
 
     public GoogleSignInUser Result {
       get {
-        IntPtr ptr = GoogleSignInImpl.GoogleSignIn_Result(SelfPtr());
+        HandleRef self = SelfPtr();
+        IntPtr ptr = GoogleSignInImpl.GoogleSignIn_Result(self);
         if (ptr == IntPtr.Zero) {
           return null;
         }
@@ -54,7 +55,7 @@ public GoogleSignInUser Result {
 
         user.IdToken = GoogleSignInImpl.GoogleSignIn_GetIdToken(userPtr);
 
-        user.AuthCode = GoogleSignInImpl.GoogleSignIn_GetServerAuthCode(userPtr);
+        user.AuthCode = GoogleSignInImpl.GoogleSignIn_GetServerAuthCode(self);
 
         string url = GoogleSignInImpl.GoogleSignIn_GetImageUrl(userPtr);
         if (url?.Length > 0) {

Editor/iOS/PListImporter.cs.meta

@@ -55,6 +55,7 @@ void UnpauseUnityPlayer() {
 struct SignInResult {
   int result_code;
   bool finished;
+  NSString* serverAuthCode;
 };
 
 std::unique_ptr<SignInResult> currentResult_;
@@ -243,6 +244,7 @@ bool GoogleSignIn_Configure(void *unused, bool useGameSignIn,
                                 hint:[GoogleSignInHandler sharedInstance]->loginHint
                                 completion:^(GIDSignInResult *result, NSError *error) {
         GIDGoogleUser *user = result.user;
+        currentResult_.get()->serverAuthCode = result.serverAuthCode;
         [[GoogleSignInHandler sharedInstance] signIn:[GIDSignIn sharedInstance] didSignInForUser:user withError:error];
     }];
     result = currentResult_.get();
@@ -322,10 +324,10 @@ static size_t CopyNSString(NSString *src, char *dest, size_t len) {
   return src ? src.length + 1 : 0;
 }
 
-size_t GoogleSignIn_GetServerAuthCode(GIDGoogleUser *guser, char *buf,
+size_t GoogleSignIn_GetServerAuthCode(SignInResult *result, char *buf,
                                       size_t len) {
-  NSString *val = [guser.configuration serverClientID];
-return CopyNSString(val, buf, len);
+    NSString *val = result->serverAuthCode;
+    return CopyNSString(val, buf, len);
 }
 
 size_t GoogleSignIn_GetDisplayName(GIDGoogleUser *guser, char *buf,

Editor/iOS/PListProcessor.cs

@@ -39,6 +39,37 @@ Add UPM dependency with branch tag `https://github.com/Thaina/google-signin-unit
 }
 ```
 
+Also, [New version of iOS recommend](https://developers.google.com/identity/sign-in/ios/quick-migration-guide#google_sign-in_sdk_v700) that we should set `GIDClientID` and `GIDServerClientID` into Info.plist
+
+So I have add an editor tool `PListProcessor` that look for plist files in the project, extract `CLIENT_ID` and `WEB_CLIENT_ID` property of the plist which contain the `BUNDLE_ID` with the same name as bundle identifier of the project
+
+The plist file in the project should be downloaded from Google Cloud Console credential page
+
+Select iOS credential and download at ⬇
+
+```xml
+<!-- This plist was the default format downloaded from your google cloud console -->
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CLIENT_ID</key> 
+	<string>{YourCloudProjectID}-yyyyyYYYYyyyyYYYYYYYYYYYYYYyyyyyy.apps.googleusercontent.com</string>
+	<key>REVERSED_CLIENT_ID</key>
+	<string>com.googleusercontent.apps.{YourCloudProjectID}-yyyyyYYYYyyyyYYYYYYYYYYYYYYyyyyyy</string>
+	<key>PLIST_VERSION</key>
+	<string>1</string>
+	<key>BUNDLE_ID</key>
+	<string>com.{YourCompany}.{YourProductName}</string>
+<!-- Optional, These 2 line below should be added manually if you need ServerAuthCode -->
+  <key>WEB_CLIENT_ID</key>
+  <string>{YourCloudProjectID}-zzzZZZZZZZZZZZZZZzzzzzzzzzzZZZzzz.apps.googleusercontent.com</string>
+</dict>
+</plist>
+```
+
+Document below is original README, some information might be outdated
+
 # Google Sign-In Unity Plugin
 _Copyright (c) 2017 Google Inc. All rights reserved._