1 files changed, 27 insertions, 0 deletions
diff --git a/static/js/components/chat.js b/static/js/components/chat.js
new file mode 100644
index 0000000..8286a37
--- /dev/null
+++ b/static/js/components/chat.js
@@ -0,0 +1,27 @@
+const runChat = async () => {
+  const frenId =
+    new URLSearchParams(document.location.search).get("fren_id") ??
+    document.getElementById("fren_id").value;
+  const html = await fetch(`/chat/messages?fren_id=${frenId}`).then((r) =>
+    r.text(),
+  );
+
+  const { scrollTop, scrollHeight } = document.getElementById(
+    "chat-container",
+  ) ?? { scrollTop: 0 };
+  const isAtEdge = scrollTop === scrollHeight || scrollTop === 0;
+  document.getElementById("messages").innerHTML = html;
+  if (isAtEdge) {
+    document.getElementById("chat-container").scrollTop =
+      document.getElementById("chat-container").scrollHeight;
+  } else {
+    // save the position.
+    document.getElementById("chat-container").scrollTop = scrollTop;
+  }
+};
+
+setTimeout(() => {
+  if (document.location.pathname === "/chat") {
+    runChat().then(() => setInterval(runChat, 5_000));
+  }
+}, 200);