Chapter 10: User avatars (10c)

app/models.py

@@ -1,7 +1,8 @@
 from datetime import datetime
+import hashlib
 from werkzeug.security import generate_password_hash, check_password_hash
 from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
-from flask import current_app
+from flask import current_app, request
 from flask_login import UserMixin, AnonymousUserMixin
 from . import db, login_manager
 
@@ -166,6 +167,12 @@ def ping(self):
         self.last_seen = datetime.utcnow()
         db.session.add(self)
 
+    def gravatar(self, size=100, default='identicon', rating='g'):
+        url = 'https://secure.gravatar.com/avatar'
+        hash = hashlib.md5(self.email.lower().encode('utf-8')).hexdigest()
+        return '{url}/{hash}?s={size}&d={default}&r={rating}'.format(
+            url=url, hash=hash, size=size, default=default, rating=rating)
+
     def __repr__(self):
         return '<User %r>' % self.username
 

app/static/styles.css

@@ -0,0 +1,8 @@
+.profile-thumbnail {
+    position: absolute;
+}
+.profile-header {
+    min-height: 260px;
+    margin-left: 280px;
+}
+

app/templates/base.html

@@ -6,6 +6,7 @@
 {{ super() }}
 <link rel="shortcut icon" href="{{ url_for('static', filename='favicon.ico') }}" type="image/x-icon">
 <link rel="icon" href="{{ url_for('static', filename='favicon.ico') }}" type="image/x-icon">
+<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='styles.css') }}">
 {% endblock %}
 
 {% block navbar %}
@@ -30,7 +31,10 @@
             <ul class="nav navbar-nav navbar-right">
                 {% if current_user.is_authenticated %}
                 <li class="dropdown">
-                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Account <b class="caret"></b></a>
+                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">
+                        <img src="{{ current_user.gravatar(size=18) }}">
+                        Account <b class="caret"></b>
+                    </a>
                     <ul class="dropdown-menu">
                         <li><a href="{{ url_for('auth.change_password') }}">Change Password</a></li>
                         <li><a href="{{ url_for('auth.change_email_request') }}">Change Email</a></li>

app/templates/user.html

@@ -4,27 +4,30 @@
 
 {% block page_content %}
 <div class="page-header">
-    <h1>{{ user.username }}</h1>
-    {% if user.name or user.location %}
-    <p>
-        {% if user.name %}{{ user.name }}{% endif %}
-        {% if user.location %}
-            from <a href="http://maps.google.com/?q={{ user.location }}">{{ user.location }}</a>
-        {% endif %}
-    </p>
-    {% endif %}
-    {% if current_user.is_administrator() %}
-    <p><a href="mailto:{{ user.email }}">{{ user.email }}</a></p>
-    {% endif %}
-    {% if user.about_me %}<p>{{ user.about_me }}</p>{% endif %}
-    <p>Member since {{ moment(user.member_since).format('L') }}. Last seen {{ moment(user.last_seen).fromNow() }}.</p>
-    <p>
-        {% if user == current_user %}
-        <a class="btn btn-default" href="{{ url_for('.edit_profile') }}">Edit Profile</a>
+    <img class="img-rounded profile-thumbnail" src="{{ user.gravatar(size=256) }}">
+    <div class="profile-header">
+        <h1>{{ user.username }}</h1>
+        {% if user.name or user.location %}
+        <p>
+            {% if user.name %}{{ user.name }}<br>{% endif %}
+            {% if user.location %}
+                from <a href="http://maps.google.com/?q={{ user.location }}">{{ user.location }}</a><br>
+            {% endif %}
+        </p>
         {% endif %}
         {% if current_user.is_administrator() %}
-        <a class="btn btn-danger" href="{{ url_for('.edit_profile_admin', id=user.id) }}">Edit Profile [Admin]</a>
+        <p><a href="mailto:{{ user.email }}">{{ user.email }}</a></p>
         {% endif %}
-    </p>
+        {% if user.about_me %}<p>{{ user.about_me }}</p>{% endif %}
+        <p>Member since {{ moment(user.member_since).format('L') }}. Last seen {{ moment(user.last_seen).fromNow() }}.</p>
+        <p>
+            {% if user == current_user %}
+            <a class="btn btn-default" href="{{ url_for('.edit_profile') }}">Edit Profile</a>
+            {% endif %}
+            {% if current_user.is_administrator() %}
+            <a class="btn btn-danger" href="{{ url_for('.edit_profile_admin', id=user.id) }}">Edit Profile [Admin]</a>
+            {% endif %}
+        </p>
+    </div>
 </div>
 {% endblock %}

tests/test_user_model.py

@@ -156,3 +156,20 @@ def test_ping(self):
         last_seen_before = u.last_seen
         u.ping()
         self.assertTrue(u.last_seen > last_seen_before)
+
+    def test_gravatar(self):
+        u = User(email='[email protected]', password='cat')
+        with self.app.test_request_context('/'):
+            gravatar = u.gravatar()
+            gravatar_256 = u.gravatar(size=256)
+            gravatar_pg = u.gravatar(rating='pg')
+            gravatar_retro = u.gravatar(default='retro')
+        with self.app.test_request_context('/', base_url='https://example.com'):
+            gravatar_ssl = u.gravatar()
+        self.assertTrue('http://www.gravatar.com/avatar/' +
+                        'd4c74594d841139328695756648b6bd6'in gravatar)
+        self.assertTrue('s=256' in gravatar_256)
+        self.assertTrue('r=pg' in gravatar_pg)
+        self.assertTrue('d=retro' in gravatar_retro)
+        self.assertTrue('https://secure.gravatar.com/avatar/' +
+                        'd4c74594d841139328695756648b6bd6' in gravatar_ssl)