Patch for Mantis v2.25 & PHP8, resolves 8 open issues with this plugin

GoogleOauth.php

@@ -49,7 +49,32 @@ function resources() {
 		return '
 			<meta name="redirectUri" content="' . plugin_config_get( 'redirect_uri' ) . '" />
 			<meta name="clientId" content="' . plugin_config_get( 'clientId' ) . '" />
-			<script type="text/javascript" src="plugins/GoogleOauth/pages/assets/js/plugin.js"></script>
+			<style>
+			#plugin_googleoauth {
+				margin-top:20px;
+				padding-top:20px;
+				border-top: 1px solid #CCC;
+				text-align:right;
+				}
+				#plugin_googleoauth a {
+						background: url('.plugin_file("google_signin_normal.png").');
+						background-size:contain;
+						background-repeat:no-repeat;
+						text-indent: 100%;
+						white-space: nowrap;
+						overflow: hidden;
+						display: inline-block;
+						height: 46px;
+						width: 191px;
+						margin-right:25px;
+				}
+				#plugin_googleoauth a:hover {
+						background: url('.plugin_file("google_signin_pressed.png").');
+						background-size:contain;
+						background-repeat:no-repeat;
+				}
+			</style>
+			<script type="text/javascript" src="'.plugin_file("plugin.js").'"></script>
 		';
 	}
 }

files/plugin.js

@@ -0,0 +1,16 @@
+$(document).ready(function () {
+    //allow admin to set password directly
+    //include input for new password
+    var redirectUri = $("meta[name='redirectUri']").attr('content');
+    var clientId = $("meta[name='clientId']").attr('content');
+    // (disabled) Send all the params
+    //var url = window.location.href
+    //var state = ( url.match(/\?(.+)$/) || [,''])[1];
+    // Send just the return param value
+    var urlParams = new URLSearchParams(window.location.search);
+    var state = urlParams.get('return') || '';
+    var html = '<div id="plugin_googleoauth">\
+        <a href="https://accounts.google.com/o/oauth2/auth?response_type=code&redirect_uri=' + redirectUri + '&client_id=' + clientId + '&scope=https://www.googleapis.com/auth/userinfo.profile+https://www.googleapis.com/auth/userinfo.email&access_type=offline&prompt=consent&state=' + state + '">Sign in with google</a>\
+        </div>';
+    $(html).insertAfter('#login-form');
+});

pages/config_update.php

@@ -6,7 +6,10 @@
 
 plugin_config_set('clientId', strip_tags(gpc_get_string('prefClientID')));
 plugin_config_set('clientSecret', strip_tags(gpc_get_string('prefClientSecret')));
-plugin_config_set('redirect_uri', config_get('path')."plugins/GoogleOauth/pages/redirect.php");
+
+$redirecturi = config_get('path');
+if(substr($redirecturi, -1) == '/') $redirecturi = rtrim($redirecturi,'/');
+plugin_config_set('redirect_uri', $redirecturi.plugin_page( 'redirect'));
 
 form_security_purge( 'plugin_GoogleOauth_config_update' );
 print_successful_redirect( plugin_page( 'config', true ) );

pages/redirect.php

@@ -8,9 +8,9 @@
 $client = new Google_Client();
 
 $client->setApplicationName("MantisBT Google authentication module");
-$client->setClientId(config_get(plugin_GoogleOauth_clientId));
-$client->setClientSecret(config_get(plugin_GoogleOauth_clientSecret));
-$client->setRedirectUri(config_get(plugin_GoogleOauth_redirect_uri));
+$client->setClientId(config_get( 'plugin_GoogleOauth_clientId' ));
+$client->setClientSecret(config_get( 'plugin_GoogleOauth_clientSecret' ));
+$client->setRedirectUri(config_get( 'plugin_GoogleOauth_redirect_uri'));
 
 $objOAuthService = new Google_Service_Oauth2($client);