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main.py
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main.py
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import os
from datetime import date, datetime
from functools import wraps
from flask import Flask, abort, render_template, redirect, url_for, flash, session
from flask_bootstrap import Bootstrap5
from flask_ckeditor import CKEditor
from flask_gravatar import Gravatar
from flask_login import UserMixin, login_user, LoginManager, current_user, logout_user, login_required
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import Integer, String, Text, ForeignKey
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
from werkzeug.security import generate_password_hash, check_password_hash
from forms import CreatePostForm, NewPost, CommentForm
app = Flask(__name__)
app.config['SECRET_KEY'] = os.environ.get('FLASK_KEY')
ckeditor = CKEditor(app)
Bootstrap5(app)
login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'
# CREATE DATABASE
class Base(DeclarativeBase):
pass
app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get("DB_URI", "sqlite:///posts.db")
db = SQLAlchemy(model_class=Base)
db.init_app(app)
gravatar = Gravatar(app,
size=100,
rating='g',
default='retro',
force_default=False,
force_lower=False,
use_ssl=False,
base_url=None)
# CONFIGURE TABLES
class User(UserMixin, db.Model):
__tablename__ = "users"
id: Mapped[int] = mapped_column(Integer, primary_key=True)
email: Mapped[str] = mapped_column(String(100), unique=True, nullable=False)
password: Mapped[str] = mapped_column(String(100), nullable=False)
name: Mapped[str] = mapped_column(String(100), nullable=False)
posts = relationship("BlogPost", back_populates="author")
comments = relationship("Comment", back_populates="comment_author")
class BlogPost(db.Model):
__tablename__ = "blog_posts"
id: Mapped[int] = mapped_column(Integer, primary_key=True)
author_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)
author = relationship("User", back_populates="posts")
title: Mapped[str] = mapped_column(String(250), unique=True, nullable=False)
subtitle: Mapped[str] = mapped_column(String(250), nullable=False)
date: Mapped[str] = mapped_column(String(250), nullable=False)
body: Mapped[str] = mapped_column(Text, nullable=False)
img_url: Mapped[str] = mapped_column(String(250), nullable=False)
comments = relationship("Comment", back_populates="parent_post")
class Comment(db.Model):
__tablename__ = "comments"
id: Mapped[int] = mapped_column(Integer, primary_key=True)
author_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)
comment_author = relationship("User", back_populates="comments")
post_id: Mapped[int] = mapped_column(Integer, ForeignKey("blog_posts.id"), nullable=False)
parent_post = relationship("BlogPost", back_populates="comments")
text: Mapped[str] = mapped_column(Text, nullable=False)
# **************************CODE********************************
def admin_required(f):
@wraps(f)
def decorated_function(*args, **kwargs):
if 'user_id' not in session or session['user_id'] != 1:
# Forbidden
abort(403)
return f(*args, **kwargs)
return decorated_function
@app.route('/register', methods=['GET', 'POST'])
def register():
form = CreatePostForm()
if form.validate_on_submit():
hashed_password = generate_password_hash(password=form.password.data, method='pbkdf2:sha256',
salt_length=8)
if db.session.execute(db.select(User).filter(User.email == form.email.data)).scalars().all():
flash('Email already exists!!')
# Change this
return redirect(url_for('get_all_posts'))
new_user = User(name=form.name.data, email=form.email.data, password=hashed_password)
db.session.add(new_user)
db.session.commit()
return redirect(url_for('get_all_posts'))
return render_template("register.html", form=form)
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
@app.route('/login', methods=['GET', 'POST'])
def login():
error = ''
form = CreatePostForm()
email = form.email.data
password = form.password.data
user = User.query.filter_by(email=email).first()
if not user:
flash("The provided email is not registered!!")
# error = "User doesn't exist"
elif not check_password_hash(user.password, password):
error = 'Password Incorrect'
elif user and check_password_hash(user.password, password):
login_user(user=user)
flash("You were successfully logged in!!")
return redirect(url_for('get_all_posts'))
else:
error = 'Unsuccessful, Password did not match'
return render_template("login.html", error=error, form=form)
@app.route('/logout')
@login_required
def logout():
logout_user()
return redirect(url_for('login'))
@admin_required
@app.route('/')
def get_all_posts():
result = db.session.execute(db.select(BlogPost))
posts = result.scalars().all()
return render_template("index.html", all_posts=posts)
# TODO: Allow logged-in users to comment on posts
@app.route("/post/<int:post_id>", methods=["GET", "POST"])
def show_post(post_id):
comment_form = CommentForm()
requested_post = db.get_or_404(BlogPost, post_id)
comments = Comment.query.filter_by(post_id=post_id).all()
current_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
if comment_form.validate_on_submit():
if not current_user.is_authenticated:
flash("You need to be logged in to comment.")
return redirect(url_for('login'))
new_comment = Comment(
text=comment_form.comment.data,
comment_author=current_user,
parent_post=requested_post
)
db.session.add(new_comment)
db.session.commit()
return redirect(url_for('show_post', post_id=post_id))
return render_template("post.html", post=requested_post, form=comment_form, comments=comments,
current_user=current_user,time=current_time,gravatar=gravatar)
@admin_required
@app.route("/new-post", methods=["GET", "POST"])
def add_new_post():
form = NewPost()
if form.validate_on_submit():
new_post = BlogPost(
title=form.title.data,
subtitle=form.subtitle.data,
date=date.today().strftime("%Y-%m-%d"),
body=form.body.data,
author_id=form.author_id.data,
img_url=form.img_url.data
)
db.session.add(new_post)
db.session.commit()
return redirect(url_for('get_all_posts'))
return render_template('make-post.html', form=form)
@admin_required
@app.route("/edit-post/<int:post_id>", methods=["GET", "POST"])
def edit_post(post_id):
post = BlogPost.query.get_or_404(post_id)
edit_form = NewPost(obj=post)
if edit_form.validate_on_submit():
post.title = edit_form.title.data
post.subtitle = edit_form.subtitle.data
post.img_url = edit_form.img_url.data
post.author_id = edit_form.author_id.data
post.body = edit_form.body.data
db.session.commit()
return redirect(url_for('show_post', post_id=post_id))
return render_template("make-post.html", form=edit_form, is_edit=True)
@admin_required
@app.route("/delete/<int:post_id>")
def delete_post(post_id):
print(post_id)
post_to_delete = db.get_or_404(BlogPost, post_id)
db.session.delete(post_to_delete)
db.session.commit()
return redirect(url_for('get_all_posts'))
@app.route("/about")
def about():
return render_template("about.html")
@app.route("/contact")
def contact():
return render_template("contact.html")
if __name__ == "__main__":
with app.app_context():
db.create_all()
app.run(debug=False, port=5002)