Ошибки...

app/__init__.py

@@ -1,3 +1,6 @@
+import logging
+from logging.handlers import SMTPHandler, RotatingFileHandler
+import os
 from flask import Flask
 from flask_sqlalchemy import SQLAlchemy
 from flask_migrate import Migrate
@@ -11,4 +14,32 @@ migrate = Migrate(app, db)
 login = LoginManager(app)
 login.login_view = 'login'
 
-from app import routes, models
+if not app.debug:
+    if app.config['MAIL_SERVER']:
+        auth = None
+        if app.config['MAIL_USERNAME'] or app.config['MAIL_PASSWORD']:
+            auth = (app.config['MAIL_USERNAME'], app.config['MAIL_PASSWORD'])
+        secure = None
+        if app.config['MAIL_USE_TLS']:
+            secure = ()
+        mail_handler = SMTPHandler(
+            mailhost=(app.config['MAIL_SERVER'], app.config['MAIL_PORT']),
+            fromaddr='no-reply@' + app.config['MAIL_SERVER'],
+            toaddrs=app.config['ADMINS'], subject='Microblog Failure',
+            credentials=auth, secure=secure)
+        mail_handler.setLevel(logging.ERROR)
+        app.logger.addHandler(mail_handler)
+
+    if not os.path.exists('logs'):
+        os.mkdir('logs')
+    file_handler = RotatingFileHandler('logs/microblog.log', maxBytes=10240,
+                                       backupCount=10)
+    file_handler.setFormatter(logging.Formatter(
+        '%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'))
+    file_handler.setLevel(logging.INFO)
+    app.logger.addHandler(file_handler)
+
+    app.logger.setLevel(logging.INFO)
+    app.logger.info('Microblog startup')
+
+from app import routes, models, errors

app/errors.py

@@ -1,10 +1,12 @@
 from flask import render_template
 from app import app, db
 
+
 @app.errorhandler(404)
 def not_found_error(error):
     return render_template('404.html'), 404
 
+
 @app.errorhandler(500)
 def internal_error(error):
     db.session.rollback()

app/forms.py

@@ -1,6 +1,8 @@
 from flask_wtf import FlaskForm
-from wtforms import StringField, PasswordField, BooleanField, SubmitField
-from wtforms.validators import ValidationError, DataRequired, Email, EqualTo
+from wtforms import StringField, PasswordField, BooleanField, SubmitField, \
+    TextAreaField
+from wtforms.validators import ValidationError, DataRequired, Email, EqualTo, \
+    Length
 import sqlalchemy as sa
 from app import db
 from app.models import User
@@ -32,3 +34,20 @@ class RegistrationForm(FlaskForm):
             User.email == email.data))
         if user is not None:
             raise ValidationError('Please use a different email address.')
+
+
+class EditProfileForm(FlaskForm):
+    username = StringField('Username', validators=[DataRequired()])
+    about_me = TextAreaField('About me', validators=[Length(min=0, max=140)])
+    submit = SubmitField('Submit')
+
+    def __init__(self, original_username, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.original_username = original_username
+
+    def validate_username(self, username):
+        if username.data != self.original_username:
+            user = db.session.scalar(sa.select(User).where(
+                User.username == username.data))
+            if user is not None:
+                raise ValidationError('Please use a different username.')

app/models.py

@@ -1,4 +1,5 @@
 from datetime import datetime, timezone
+from hashlib import md5
 from typing import Optional
 import sqlalchemy as sa
 import sqlalchemy.orm as so
@@ -14,6 +15,9 @@ class User(UserMixin, db.Model):
     email: so.Mapped[str] = so.mapped_column(sa.String(120), index=True,
                                              unique=True)
     password_hash: so.Mapped[Optional[str]] = so.mapped_column(sa.String(256))
+    about_me: so.Mapped[Optional[str]] = so.mapped_column(sa.String(140))
+    last_seen: so.Mapped[Optional[datetime]] = so.mapped_column(
+        default=lambda: datetime.now(timezone.utc))
 
     posts: so.WriteOnlyMapped['Post'] = so.relationship(
         back_populates='author')
@@ -27,6 +31,10 @@ class User(UserMixin, db.Model):
     def check_password(self, password):
         return check_password_hash(self.password_hash, password)
 
+    def avatar(self, size):
+        digest = md5(self.email.lower().encode('utf-8')).hexdigest()
+        return f'https://www.gravatar.com/avatar/{digest}?d=identicon&s={size}'
+
 
 @login.user_loader
 def load_user(id):

app/routes.py

@@ -1,12 +1,20 @@
+from datetime import datetime, timezone
 from urllib.parse import urlsplit
 from flask import render_template, flash, redirect, url_for, request
 from flask_login import login_user, logout_user, current_user, login_required
 import sqlalchemy as sa
 from app import app, db
-from app.forms import LoginForm, RegistrationForm
+from app.forms import LoginForm, RegistrationForm, EditProfileForm
 from app.models import User
 
 
+@app.before_request
+def before_request():
+    if current_user.is_authenticated:
+        current_user.last_seen = datetime.now(timezone.utc)
+        db.session.commit()
+
+
 @app.route('/')
 @app.route('/index')
 @login_required
@@ -62,3 +70,31 @@ def register():
         flash('Congratulations, you are now a registered user!')
         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': 'Test post #1'},
+        {'author': user, 'body': 'Test post #2'}
+    ]
+    return render_template('user.html', user=user, posts=posts)
+
+
+@app.route('/edit_profile', methods=['GET', 'POST'])
+@login_required
+def edit_profile():
+    form = EditProfileForm(current_user.username)
+    if form.validate_on_submit():
+        current_user.username = form.username.data
+        current_user.about_me = form.about_me.data
+        db.session.commit()
+        flash('Your changes have been saved.')
+        return redirect(url_for('edit_profile'))
+    elif request.method == 'GET':
+        form.username.data = current_user.username
+        form.about_me.data = current_user.about_me
+    return render_template('edit_profile.html', title='Edit Profile',
+                           form=form)

app/templates/404.html

@@ -1,6 +1,6 @@
 {% extends "base.html" %}
 
 {% block content %}
-    <h1>File Not Found</h1>
+    <h1>Not Found</h1>
     <p><a href="{{ url_for('index') }}">Back</a></p>
 {% endblock %}

app/templates/_post.html

@@ -1,6 +1,6 @@
-<table>
-  <tr valign="top">
-    <td><img src="{{ post.author.avatar(36) }}"></td>
-    <td>{{ post.author.username }} says:<br>{{ post.body }}</td>
-  </tr>
-</table>
+    <table>
+        <tr valign="top">
+            <td><img src="{{ post.author.avatar(36) }}"></td>
+            <td>{{ post.author.username }} says:<br>{{ post.body }}</td>
+        </tr>
+    </table>

app/templates/base.html

@@ -14,6 +14,7 @@
             {% 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 %}
         </div>

app/templates/user.html

@@ -8,14 +8,14 @@
                 <h1>User: {{ user.username }}</h1>
                 {% if user.about_me %}<p>{{ user.about_me }}</p>{% endif %}
                 {% if user.last_seen %}<p>Last seen on: {{ user.last_seen }}</p>{% endif %}
+                {% if user == current_user %}
+                <p><a href="{{ url_for('edit_profile') }}">Edit your profile</a></p>
+                {% endif %}
             </td>
         </tr>
     </table>
-{% if user == current_user %}
-  <p><a href="{{ url_for('edit_profile') }}">Edit your profile</a></p>
-{% endif %}
     <hr>
     {% for post in posts %}
-      {% include '_post.html' %}
+        {% include '_post.html' %}
     {% endfor %}
 {% endblock %}