add edit thread routes

app/routes/threads.py

@@ -90,13 +90,26 @@ def reply(thread_id):
 @login_required
 @ownership_or_mod_required
 def edit(thread_id):
-    return 'stub'
+    thread = Threads.find({'id': thread_id})
+    if not thread:
+        abort(404)
+    return render_template('threads/edit.html', thread=thread)
 
 @bp.post('/<int:thread_id>/edit/')
 @login_required
 @ownership_or_mod_required
 def edit_post(thread_id):
-    return 'stub'
+    thread = Threads.find({'id': thread_id})
+    if not thread:
+        abort(404)
+    new_title = request.form.get('title', '').strip()
+    if not new_title:
+        abort(400)
+
+    if new_title != thread.title:
+        thread.update({'title': new_title})
+
+    return redirect(url_for('.thread_by_id', thread_id=thread_id))
 
 @bp.post('/<int:thread_id>/subscribe/')
 @login_required
@@ -168,14 +181,11 @@ def new_post():
 
     user = get_active_user()
     if not user.can_post_to_thread_or_topic(topic):
-        abort(404)
+        abort(403)
 
-    title = request.form.get('title')
+    title = request.form.get('title', '').strip()
     if not title:
-        abort(404)
-
-    if not title.strip():
-        abort(404)
+        abort(400)
 
     title = title.strip()