From a3a7d7afa4e6923b9c5acc37bd510405bc002e09 Mon Sep 17 00:00:00 2001
From: "robin.de.croock" <decroock.robin@gmail.com>
Date: Mon, 24 Apr 2023 17:55:09 +0200
Subject: [PATCH] Allow sending scheduled messages through the slack API

---
 .../Component/Notifier/Bridge/Slack/SlackOptions.php   | 10 ++++++++++
 .../Component/Notifier/Bridge/Slack/SlackTransport.php |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/src/Symfony/Component/Notifier/Bridge/Slack/SlackOptions.php b/src/Symfony/Component/Notifier/Bridge/Slack/SlackOptions.php
index f6fe5d5411e18..dc7831d592b0a 100644
--- a/src/Symfony/Component/Notifier/Bridge/Slack/SlackOptions.php
+++ b/src/Symfony/Component/Notifier/Bridge/Slack/SlackOptions.php
@@ -87,6 +87,16 @@ public function asUser(bool $bool): static
         return $this;
     }
 
+    /**
+     * @return $this
+     */
+    public function postAt(\DateTime $timestamp): static
+    {
+        $this->options['post_at'] = $timestamp->getTimestamp();
+
+        return $this;
+    }
+
     /**
      * @return $this
      */
diff --git a/src/Symfony/Component/Notifier/Bridge/Slack/SlackTransport.php b/src/Symfony/Component/Notifier/Bridge/Slack/SlackTransport.php
index d8235f48aa8d8..39e570d419fba 100644
--- a/src/Symfony/Component/Notifier/Bridge/Slack/SlackTransport.php
+++ b/src/Symfony/Component/Notifier/Bridge/Slack/SlackTransport.php
@@ -76,6 +76,10 @@ protected function doSend(MessageInterface $message): SlackSentMessage
         $options['text'] = $message->getSubject();
 
         $apiMethod = $message->getOptions() instanceof UpdateMessageSlackOptions ? 'chat.update' : 'chat.postMessage';
+        if (\array_key_exists('post_at', $options)) {
+            $apiMethod = 'chat.scheduleMessage';
+        }
+
         $response = $this->client->request('POST', 'https://'.$this->getEndpoint().'/api/'.$apiMethod, [
             'json' => array_filter($options),
             'auth_bearer' => $this->accessToken,