add responding to thread

app/routes/threads.py

@@ -52,6 +52,24 @@ def thread(slug):
     )
 
 
+@bp.post("/<slug>")
+@login_required
+def reply(slug):
+    thread = Threads.find({"slug": slug})
+    if not thread:
+        return "no"
+    user = get_active_user()
+    if user.is_guest():
+        return "no"
+    if thread.locked() and not user.is_mod():
+        return "no"
+
+    post_content = request.form['post_content']
+    post = create_post(thread.id, user.id, post_content)
+
+    return redirect(url_for(".thread", slug=slug, after=post.id, _anchor="latest-post"))
+
+
 @bp.get("/create")
 @login_required
 def create():