add unread count to thread title in topic view and thread view

app/routes/topics.py

@@ -1,8 +1,8 @@
 from flask import (
     Blueprint, render_template, request, redirect, url_for, flash, session
     )
-from .users import login_required, mod_only
-from ..models import Users, Topics, Threads
+from .users import login_required, mod_only, get_active_user, is_logged_in
+from ..models import Users, Topics, Threads, Subscriptions
 from ..constants import InfoboxKind
 from slugify import slugify
 import time
@@ -62,9 +62,22 @@ def topic(slug):
     page_count = max(math.ceil(threads_count / THREADS_PER_PAGE), 1)
     page = max(1, min(int(request.args.get('page', default=1)), page_count))
 
+    threads_list = target_topic.get_threads(THREADS_PER_PAGE, page, sort_by)
+    subscriptions = {}
+    if is_logged_in():
+        for thread in threads_list:
+            subscription = Subscriptions.find({
+                'user_id': get_active_user().id,
+                'thread_id': thread['id'],
+                })
+            if subscription:
+                print(subscription.get_unread_count())
+                subscriptions[subscription.id] = subscription.get_unread_count()
+
     return render_template(
         "topics/topic.html",
-        threads_list = target_topic.get_threads(THREADS_PER_PAGE, page, sort_by),
+        threads_list = threads_list,
+        subscriptions = subscriptions,
         topic = target_topic,
         current_page = page,
         page_count = page_count