add super hacky "cache" for top posts

suchwow/routes/post.py

@@ -1,3 +1,5 @@
+import pickle
+from datetime import datetime
 from os import path, remove
 from io import BytesIO
 from base64 import b64encode
@@ -20,17 +22,42 @@ bp = Blueprint("post", "post")
 @bp.route("/posts/top")
 def top():
     top_posts = {}
+    pickle_file = path.join(config.DATA_FOLDER, 'top_posts.pkl')
+
+    try:
+        mtime_ts = path.getmtime(pickle_file)
+        mtime = datetime.fromtimestamp(mtime_ts)
+        now = datetime.now()
+        diff = now - mtime
+
+        # If pickled data file is less than an hour old, load it and render page
+        # Otherwise, determine balances, build json, store pickled data, and render page
+        if diff.seconds < 3600:
+            with open(pickle_file, 'rb') as f:
+                print('Loading pickled data for /posts/top')
+                pickled_data = pickle.load(f)
+                return render_template("post/top.html", posts=pickled_data)
+    except:
+        pass
+
+    print('Generating and pickling new data for /posts/top')
     posts = Post.select().where(Post.approved==True)
     for post in posts:
         transfers = []
         incoming = wownero.Wallet().incoming_transfers(post.account_index)
         if "transfers" in incoming:
             for xfer in incoming["transfers"]:
-                transfers.append(wownero.from_atomic(xfer["amount"]))
-        total = sum(transfers)
+                transfers.append(xfer["amount"])
+        total = wownero.from_atomic(sum(transfers))
         if total > 0:
             top_posts[float(total)] = post
-    return render_template("post/top.html", posts=sorted(top_posts.items(), reverse=True))
+
+    _t = sorted(top_posts.items(), reverse=True)[0:10]
+
+    with open(pickle_file, 'wb') as f:
+        f.write(pickle.dumps(_t))
+
+    return render_template("post/top.html", posts=_t)
 
 @bp.route("/post/<id>")
 def read(id):

suchwow/templates/post/top.html

@@ -5,7 +5,7 @@
 <div class="container" style="text-align:center;">
 
   <div class="title">
-    <h3>{% block title %}Top Posts{% endblock %}</h3>
+    <h3>{% block title %}Top 10 Posts{% endblock %}</h3>
   </div>
 
   {% if posts %}