backend/README.md

@@ -16,6 +16,7 @@ pip install flask-sqlalchemy
 pip install flask-migrate
 pip install flask-login
 pip install email-validator
+pip install pydenticon
 ...
 pip freeze > requirements.txt
 ```

backend/app/models.py

@@ -1,9 +1,12 @@
+import os
 from datetime import datetime, timezone
 from typing import Optional
 import sqlalchemy as sa
 import sqlalchemy.orm as so
-from app import db, login
 from werkzeug.security import generate_password_hash, check_password_hash
+import pydenticon, hashlib, base64
+
+from app import db, login
 from flask_login import UserMixin
 
 class User(UserMixin, db.Model):
@@ -17,6 +20,33 @@ class User(UserMixin, db.Model):
         self.password_hash = generate_password_hash(password)
     def check_password(self, password):
         return check_password_hash(self.password_hash, password)
+    def gen_avatar(self, write_png=True):
+        foreground = [ "rgb(45,79,255)",
+               "rgb(254,180,44)",
+               "rgb(226,121,234)",
+               "rgb(30,179,253)",
+               "rgb(232,77,65)",
+               "rgb(49,203,115)",
+               "rgb(141,69,170)" ]
+        background = "rgb(22,22,22)"
+
+        digest = hashlib.md5(self.email.lower().encode('utf-8')).hexdigest()
+        basedir = os.path.abspath(os.path.dirname(__file__))
+        pngloc = os.path.join(basedir, 'usercontent', 'identicon', str(digest) + '.png')
+        icongen = pydenticon.Generator(5, 5, digest=hashlib.md5, foreground=foreground, background=background)
+        pngicon = icongen.generate(self.email, 120, 120, padding=(10, 10, 10, 10), inverted=False, output_format="png")
+        if write_png:
+            pngfile = open(pngloc, "wb")
+            pngfile.write(pngicon)
+            pngfile.close()
+        else:
+            return str(base64.b64encode(pngicon))[2:-1]
+    def avatar(self):
+        digest = hashlib.md5(self.email.lower().encode('utf-8')).hexdigest()
+        basedir = os.path.abspath(os.path.dirname(__file__))
+        pngloc = os.path.join(basedir, 'usercontent', 'identicon', digest + '.png')
+        return pngloc
+
     def __repr__(self):
         return '<User {}>'.format(self.username)
 

backend/app/routes.py

@@ -57,8 +57,17 @@ def register():
         user.set_password(form.password.data)
         db.session.add(user)
         db.session.commit()
+        user.gen_avatar()
         flash('User has been created.')
         return redirect(url_for('login'))
     return render_template('register.html', title='Register', form=form)
 
-
+@app.route('/user/<username>')
+@login_required
+def user(username):
+    user = db.first_or_404(sa.select(User).where(User.username == username))
+    posts = [
+        {'author': user, 'body': 'Test1'},
+        {'author': user, 'body': 'Test2?'}
+    ]
+    return render_template('user.html', user=user, posts=posts)

backend/app/templates/_post.html

@@ -0,0 +1,6 @@
+	<table>
+		<tr valign="top">
+			<td><img width="60" height=="60" src="data:image/png;base64,{{ user.gen_avatar(write_png=False) }}"></td>
+			<td>{{ post.author.username }} says:<br>{{ post.body }}</td>
+		</tr>
+	</table>

backend/app/templates/base.html

@@ -15,6 +15,7 @@
 			{% if current_user.is_anonymous %}
 			<a href="{{ url_for('login') }}">login</a>
 			{% else %}
+			<a href="{{ url_for('user', username=current_user.username) }}">Profile</a>
 			<a href="{{ url_for('logout') }}">logout</a>
 			{% endif %}
 

backend/app/templates/user.html

@@ -0,0 +1,15 @@
+{% extends "base.html" %}
+
+{% block content %}
+	<table>
+		<tr valign="top">
+			<td><img src="data:image/png;base64,{{ user.gen_avatar(write_png=False) }}"></td>
+			<td><h1>User: {{ user.username }}</h1></td>
+		</tr>
+	</table>
+	<hr>
+	{% for post in posts %}
+		{% include '_post.html' %}
+	{% endfor %}
+{% endblock %}
+

backend/requirements.txt

@@ -14,6 +14,8 @@ itsdangerous==2.2.0
 Jinja2==3.1.4
 Mako==1.3.5
 MarkupSafe==2.1.5
+pillow==10.4.0
+pydenticon==0.3.1
 python-dotenv==1.0.1
 SQLAlchemy==2.0.31
 typing_extensions==4.12.2