models: Allow scheduled msgs to store rendered content.

This is required by the client to display a list of currently
scheduled messages.

zerver/actions/message_send.py

@@ -467,7 +467,11 @@ def do_schedule_messages(send_message_requests: Sequence[SendMessageRequest]) ->
         scheduled_message.recipient = send_request.message.recipient
         topic_name = send_request.message.topic_name()
         scheduled_message.set_topic_name(topic_name=topic_name)
+        rendering_result = render_markdown(
+            send_request.message, send_request.message.content, send_request.realm
+        )
         scheduled_message.content = send_request.message.content
+        scheduled_message.rendered_content = rendering_result.rendered_content
         scheduled_message.sending_client = send_request.message.sending_client
         scheduled_message.stream = send_request.stream
         scheduled_message.realm = send_request.realm

zerver/migrations/0435_scheduledmessage_rendered_content.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.5 on 2023-01-16 08:35
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("zerver", "0434_create_nobody_system_group"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="scheduledmessage",
+            name="rendered_content",
+            field=models.TextField(default=""),
+            preserve_default=False,
+        ),
+    ]

zerver/models.py

@@ -4326,6 +4326,7 @@ class ScheduledMessage(models.Model):
     recipient = models.ForeignKey(Recipient, on_delete=CASCADE)
     subject = models.CharField(max_length=MAX_TOPIC_NAME_LENGTH)
     content = models.TextField()
+    rendered_content = models.TextField()
     sending_client = models.ForeignKey(Client, on_delete=CASCADE)
     stream = models.ForeignKey(Stream, null=True, on_delete=CASCADE)
     realm = models.ForeignKey(Realm, on_delete=CASCADE)

zerver/tests/test_message_send.py

@@ -1385,6 +1385,7 @@ class ScheduledMessageTest(ZulipTestCase):
         message = self.last_scheduled_message()
         self.assert_json_success(result)
         self.assertEqual(message.content, "Test message 1")
+        self.assertEqual(message.rendered_content, "<p>Test message 1</p>")
         self.assertEqual(message.topic_name(), "Test topic")
         self.assertEqual(message.scheduled_timestamp, convert_to_UTC(defer_until))
         self.assertEqual(message.delivery_type, ScheduledMessage.SEND_LATER)
@@ -1405,6 +1406,7 @@ class ScheduledMessageTest(ZulipTestCase):
         message = self.last_scheduled_message()
         self.assert_json_success(result)
         self.assertEqual(message.content, "Test message 3")
+        self.assertEqual(message.rendered_content, "<p>Test message 3</p>")
         self.assertEqual(message.scheduled_timestamp, convert_to_UTC(defer_until))
         self.assertEqual(message.delivery_type, ScheduledMessage.SEND_LATER)