From 9b0f8936192bd2ea909a753a956b6884d1f475d5 Mon Sep 17 00:00:00 2001
From: Yuriy Bakhtin <yurybakh@gmail.com>
Date: Fri, 15 Sep 2023 16:19:10 +0200
Subject: [PATCH] Wrap URLs in email messages to "go" app

---
 protected/humhub/components/mail/Message.php | 27 +++++++-
 protected/humhub/config/common.php           |  1 +
 protected/humhub/libs/GoAppService.php       | 70 ++++++++++++++++++++
 3 files changed, 97 insertions(+), 1 deletion(-)
 create mode 100644 protected/humhub/libs/GoAppService.php

diff --git a/protected/humhub/components/mail/Message.php b/protected/humhub/components/mail/Message.php
index d1d5297b5a..893e3eabea 100644
--- a/protected/humhub/components/mail/Message.php
+++ b/protected/humhub/components/mail/Message.php
@@ -8,12 +8,37 @@
 
 namespace humhub\components\mail;
 
+use humhub\libs\GoAppService;
+use yii\symfonymailer\Message as BaseMessage;
+
 /**
  * Message
  *
  * @since 1.2
  * @author Luke
  */
-class Message extends \yii\symfonymailer\Message
+class Message extends BaseMessage
 {
+    private ?GoAppService $goAppService = null;
+
+    /**
+     * @inheritdoc
+     */
+    public function setHtmlBody($html): BaseMessage
+    {
+        return BaseMessage::setHtmlBody($this->getGoAppService()->processLinks($html));
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function setTextBody($text): BaseMessage
+    {
+        return BaseMessage::setTextBody($this->getGoAppService()->processUrls($text));
+    }
+
+    private function getGoAppService(): GoAppService
+    {
+        return $this->goAppService ?? new GoAppService();
+    }
 }
diff --git a/protected/humhub/config/common.php b/protected/humhub/config/common.php
index 41be2ba7d1..725e3a18ab 100644
--- a/protected/humhub/config/common.php
+++ b/protected/humhub/config/common.php
@@ -253,6 +253,7 @@ $config = [
             // Marketplace / New Version Check
             'apiEnabled' => true,
             'apiUrl' => 'https://api.humhub.com',
+            'goUrl' => 'https://go.humhub.com',
         ],
         'search' => [
             'zendLucenceDataDir' => '@runtime/searchdb',
diff --git a/protected/humhub/libs/GoAppService.php b/protected/humhub/libs/GoAppService.php
new file mode 100644
index 0000000000..65b8446323
--- /dev/null
+++ b/protected/humhub/libs/GoAppService.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * @link https://www.humhub.org/
+ * @copyright Copyright (c) HumHub GmbH & Co. KG
+ * @license https://www.humhub.com/licences
+ */
+
+namespace humhub\libs;
+
+use Yii;
+
+/**
+ * Service to handle URLs to "go" app in order to open then in mobile app
+ *
+ * @since 1.15
+ * @author Luke
+ */
+class GoAppService
+{
+    private ?string $appUrl;
+    private ?string $sitePattern;
+    private ?string $hid = null;
+
+    public function __construct()
+    {
+        $this->appUrl = Yii::$app->params['humhub']['goUrl'] ?? null;
+
+        $baseUrl = Yii::$app->settings->get('baseUrl');
+        $this->sitePattern = is_string($baseUrl) ? preg_quote($baseUrl, '#') : null;
+
+        $installationId = Yii::$app->getModule('admin')->settings->get('installationId');
+        $this->hid = is_string($installationId) && strlen($installationId) > 5
+            ? substr($installationId, 0, 3) . substr($installationId, -3)
+            : null;
+    }
+
+    public function isEnabled(): bool
+    {
+        return is_string($this->appUrl) && is_string($this->hid) && is_string($this->sitePattern);
+    }
+
+    public function processUrls(string $text): ?string
+    {
+        return $this->isEnabled()
+            ? preg_replace_callback('#' . $this->sitePattern . '[^\s]+#i', [$this, 'callbackReplaceUrl'], $text)
+            : $text;
+    }
+
+    private function callbackReplaceUrl($matches)
+    {
+        return $this->buildUrl($matches[0]);
+    }
+
+    public function processLinks($text): ?string
+    {
+        return $this->isEnabled()
+            ? preg_replace_callback('#(<a.+?href=")(' . $this->sitePattern . '.+?)(".*?>)#i', [$this, 'callbackReplaceLink'], $text)
+            : $text;
+    }
+
+    private function callbackReplaceLink($matches)
+    {
+        return $matches[1] . $this->buildUrl($matches[2]) . $matches[3];
+    }
+
+    public function buildUrl(string $url): string
+    {
+        return $this->appUrl . '?url=' . urlencode($url) . '&hid=' . $this->hid;
+    }
+}