Apply highlights in chat even when notify is none

When notify is none, the buffer should not appear in the hotlist even
for a highlight. However, when switching to the buffer, we want the line
to be highlighted. To achieve this use a tag added to highlight_tags on
the buffer.

3 files changed, 11 insertions, 1 deletions

diff --git a/slack/shared.py b/slack/shared.py
index 1661a04..eeb6df5 100644
--- a/slack/shared.py
+++ b/slack/shared.py
@@ -29,6 +29,7 @@ class Shared:
         self.config: SlackConfig
         self.uncaught_errors: List[UncaughtError] = []
         self.standard_emojis: Dict[str, Emoji]
+        self.highlight_tag = "highlight"
 
 
 shared = Shared()
diff --git a/slack/slack_buffer.py b/slack/slack_buffer.py
index 9554db1..adad7b7 100644
--- a/slack/slack_buffer.py
+++ b/slack/slack_buffer.py
@@ -203,6 +203,12 @@ class SlackBuffer(ABC):
         name, buffer_props = await self.get_name_and_buffer_props()
         full_name = self.get_full_name(name)
 
+        buffer_props["highlight_tags"] = (
+            f"{buffer_props['highlight_tags']},{shared.highlight_tag}"
+            if buffer_props.get("highlight_tags")
+            else shared.highlight_tag
+        )
+
         if switch:
             buffer_props["display"] = "1"
 
diff --git a/slack/slack_message.py b/slack/slack_message.py
index c51c8b4..ddb2ceb 100644
--- a/slack/slack_message.py
+++ b/slack/slack_message.py
@@ -383,7 +383,10 @@ class SlackMessage:
         elif priority == MessagePriority.LOW:
             return None
         elif priority == MessagePriority.NONE:
-            return "notify_none"
+            tags = ["notify_none"]
+            if self.should_highlight(False):
+                tags.append(shared.highlight_tag)
+            return ",".join(tags)
         else:
             assert_never(priority)