In process

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+.idea/
+db/
+*.db

app.py

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+from datetime import datetime
+
+from flask import Flask, render_template, url_for, redirect, request, flash
+from flask_login import LoginManager, login_user, logout_user, current_user,login_required
+from flask_login import UserMixin
+from flask_sqlalchemy import SQLAlchemy
+from werkzeug.security import generate_password_hash, check_password_hash
+from flask_migrate import Migrate
+from forms import LoginForm, RegistrationForm
+import shortener
+from sqlalchemy import MetaData
+
+app = Flask(__name__)
+app.config.from_object('config')
+app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///list.db'
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+convention = {
+    "ix": 'ix_%(column_0_label)s',
+    "uq": "uq_%(table_name)s_%(column_0_name)s",
+    "ck": "ck_%(table_name)s_%(constraint_name)s",
+    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
+    "pk": "pk_%(table_name)s"
+}
+
+metadata = MetaData(naming_convention=convention)
+db = SQLAlchemy(app,metadata=metadata)
+login_manager = LoginManager()
+login_manager.init_app(app)
+login_manager.login_view = 'login'
+migrate = Migrate(app, db)
+
+
+
+@login_manager.user_loader
+def load_user(user_id):
+    return User.query.get(user_id)
+
+
+shortened_urls = {}
+
+
+class Article(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    full_url = db.Column(db.String, nullable=False)
+    short_url = db.Column(db.String, nullable=False)
+    date = db.Column(db.DateTime, default=datetime.utcnow)
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+
+    def __repr__(self):
+        return '<Article %r>' % self.id
+
+
+class User(db.Model, UserMixin):
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(64), index=True, unique=True)
+    password = db.Column(db.String(128))
+    role = db.Column(db.String(10), index=True)
+
+
+
+    def set_password(self, password):
+        self.password = generate_password_hash(password)
+
+    def check_password(self, password):
+        return check_password_hash(self.password, password)
+
+    def __repr__(self):
+        return '<User {}>'.format(self.username)
+
+
+@app.route("/", methods=['GET', 'POST'])
+def index():
+    if request.method == 'POST':
+        full_url = request.form['full_url']
+        short_url = shortener.generate_short_url()
+        while short_url in shortened_urls:
+            short_url = shortener.generate_short_url()
+        shortened_urls[short_url] = full_url
+        if current_user.is_authenticated:
+            article = Article(full_url=full_url, short_url=short_url,user_id=current_user.id)
+            try:
+                db.session.add(article)
+                db.session.commit()
+                return redirect('short_url')
+            except:
+                return 'При преобразовании возникла проблема'
+        flash('Для просмотра истории создания ваших ссылок необходимо войти или зарегистрироваться')
+        return render_template('nonreg.html',full_url=full_url,short_url=short_url)
+    return render_template('index.html')
+
+
+@app.route('/short_url')
+@login_required
+def short_url():
+    #article = Article.query.order_by(Article.date).all()
+    res = db.session.query(Article,User).join(Article, User.id == Article.user_id).all()
+    return render_template('short_url.html', res=res)
+
+
+@app.route('/login')
+def login():
+    if current_user.is_authenticated:
+        return redirect(url_for('index'))
+    title = "Авторизация"
+    login_form = LoginForm()
+    return render_template('login.html', page_title=title, form=login_form)
+
+
+@app.route('/process-login', methods=['POST'])
+def process_login():
+    form = LoginForm()
+    if form.validate_on_submit():
+        user = User.query.filter_by(username=form.username.data).first()
+        if user and user.check_password(form.password.data):
+            login_user(user)
+            flash('Вы вошли на сайт')
+            return redirect(url_for('index'))
+    flash('Неправильное имя пользователя или пароль')
+    return redirect(url_for('login'))
+
+
+@app.route('/logout')
+@login_required
+def logout():
+    logout_user()
+    flash('Вы успешно вышли')
+    return redirect(url_for('index'))
+
+@app.route('/register')
+def register():
+    if current_user.is_authenticated:
+        return redirect(url_for('index'))
+    form = RegistrationForm()
+    title = "Регистрация"
+    return render_template('registration.html',page_title=title, form=form)
+
+
+@app.route('/process-reg', methods=['POST'])
+def process_reg():
+    form = RegistrationForm()
+    if form.validate_on_submit():
+        new_user = User(username=form.username.data,role='user')
+        new_user.set_password(form.password.data)
+        db.session.add(new_user)
+        db.session.commit()
+        flash('Вы успешно зарегистрировались!')
+        return redirect(url_for('login'))
+    else:
+        for field, errors in form.errors.items():
+            for error in errors:
+                flash('Ошибка в поле "{}": - {}'.format(
+                    getattr(form, field).label.text,
+                    error
+                ))
+        return redirect(url_for('user.register'))
+
+
+@app.route('/<short_url>')
+def redirect_url(short_url):
+    try:
+        f = Article.query.filter_by(short_url=short_url).one()
+        if f.full_url:
+            return redirect(f.full_url)
+    except:
+        return 'Url not found'
+
+
+if __name__ == '__main__':
+    with app.app_context():  # <--- without these two lines,
+        db.create_all()  # <--- we get the OperationalError in the title
+        app.run(debug=True)

config.py

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+CSRF_ENABLED = True
+SECRET_KEY = 'you-will-never-guess'