add qr codes to posts

requirements.txt

@@ -5,3 +5,5 @@ peewee
 gunicorn
 six
 praw
+qrcode
+Pillow

suchwow/routes/post.py

@@ -1,4 +1,7 @@
 from os import path, remove
+from io import BytesIO
+from base64 import b64encode
+from qrcode import make as qrcode_make
 from flask import render_template, Blueprint, request, session, flash
 from flask import send_from_directory, redirect, url_for, current_app
 from werkzeug.utils import secure_filename
@@ -31,6 +34,8 @@ def top():
 
 @bp.route("/post/<id>")
 def read(id):
+    _address_qr = BytesIO()
+    qr_code = None
     if Post.filter(id=id):
         wallet = wownero.Wallet()
         post = Post.get(id=id)
@@ -41,6 +46,9 @@ def read(id):
         if wallet.connected:
             address = wallet.get_address(account=post.account_index)
             transfers = wallet.transfers(account=post.account_index)
+            qr_uri = f'wownero:{address}?tx_description=suchwow%20post%20{post.id}'
+            address_qr = qrcode_make(qr_uri).save(_address_qr)
+            qr_code = b64encode(_address_qr.getvalue()).decode()
         else:
             address = "?"
             transfers = "?"
@@ -48,7 +56,8 @@ def read(id):
             "post/read.html",
             post=post,
             address=address,
-            transfers=transfers
+            transfers=transfers,
+            qr_code=qr_code
         )
     else:
         flash("No meme there, brah")

suchwow/templates/post/read.html

@@ -24,6 +24,9 @@
       <!-- Payments -->
       <h2>Payments</h2>
       <p style="word-break:break-all;">Vote for this post by sending WOW to the following address:<br><i>{{ address }}</i></p>
+      {% if qr_code %}
+        <img src="data:image/png;base64,{{ qr_code }}" width=180 class="center"><br /><br />
+      {% endif %}
       <h5>WOW Received</h5>
       {% if transfers.in %}
         <ul>