Make messages look better and publish multiple for push events

For push events, publish one message per commit pushed, up to a limit of
15.

src/main.rs

@@ -105,28 +105,22 @@ async fn ensure_matrix_room_joined(matrix_client: &Client, room_id: &OwnedRoomOr
     room.ok_or_else(|| anyhow!("Unable to join room {}", room_id))
 }
 
-fn build_gitlab_message(event: &GitlabEvent) -> String {
+fn build_gitlab_messages(event: &GitlabEvent) -> Vec<String> {
     let project = event.project();
-    let r = event.r#ref();
-    let refname = if r.starts_with("refs/") {
-        let parts = r.split('/').collect::<Vec<_>>();
-        if parts.len() > 2 {
-            parts.into_iter().skip(2).collect::<Vec<_>>().join("/").to_string()
-        } else {
-            drop(parts);
-            r.to_string()
-        }
-    } else {
-        r.to_string()
-    };
-    format!(
-        "*{}* {} **{}** [{}]({})",
-        project.path_with_namespace,
-        refname,
-        event.user(),
-        event.title(),
-        event.url()
-    )
+    let refname = event::parse_ref(event.r#ref());
+    event
+        .titles()
+        .iter()
+        .map(|title| {
+            format!(
+                "\\[{}\\] `{}` *{}* {}",
+                project.path_with_namespace,
+                refname,
+                event.user(),
+                title,
+            )
+        })
+        .collect()
 }
 
 async fn handle_gitlab_event(
@@ -145,10 +139,11 @@ async fn handle_gitlab_event(
     }
 
     let room = ensure_matrix_room_joined(matrix_client, room_id).await?;
-    let msg = build_gitlab_message(&event);
-    debug!("Sending message to {}: {}", room_id, msg);
-    let msg_content = RoomMessageEventContent::text_markdown(&msg);
-    room.send(msg_content, None).await?;
+    for msg in build_gitlab_messages(&event) {
+        debug!("Sending message to {}: {}", room_id, msg);
+        let msg_content = RoomMessageEventContent::text_markdown(&msg);
+        room.send(msg_content, None).await?;
+    }
     Ok(())
 }