main.py

import os
from flask import Flask, render_template, redirect, url_for, flash, request, abort
from flask_bootstrap import Bootstrap
from flask_ckeditor import CKEditor
from datetime import date
from werkzeug.security import generate_password_hash, check_password_hash
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.orm import relationship
from flask_login import UserMixin, login_user, LoginManager, login_required, current_user, logout_user
from forms import CreatePostForm, RegisterForm, LoginForm, CommentForm
from flask_gravatar import Gravatar
from functools import wraps
import smtplib

MY_EMAIL = os.environ['MY_EMAIL']
PASSWORD = os.environ['MY_EMAIL_APP_PASSWORD']

app = Flask(__name__)
app.config['SECRET_KEY'] = os.environ.get('SECRET_KEY')
ckeditor = CKEditor(app)
Bootstrap(app)

##CONNECT TO DB
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///blog.db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)

login_manager = LoginManager()
login_manager.init_app(app)


def sendmail(email, name, phone_no, message):
    data = f"""Subject: Blog-Site Feedback\n\nEmail: {email} \nName: {name} \nPhone no: {phone_no} \nMessage: {message}\n"""
    with smtplib.SMTP('smtp.gmail.com', port=587) as connection:
        connection.starttls()
        connection.login(user=MY_EMAIL, password=PASSWORD)
        connection.sendmail(
            from_addr=MY_EMAIL,
            to_addrs=os.environ['TO_ADDRS'],
            msg=data
        )
        connection.quit()


def admin_only(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        # If id is not 1 then return abort with 403 error
        if not current_user.is_authenticated or current_user.id != 1:
            return abort(403)
        # Otherwise continue with the route function
        return f(*args, **kwargs)

    return decorated_function


@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))


##CONFIGURE TABLES
class User(UserMixin, db.Model):
    __tablename__ = "users"
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(100), unique=True)
    password = db.Column(db.String(100))
    name = db.Column(db.String(100))

    posts = relationship("BlogPost", back_populates="author")
    comments = relationship("Comment", back_populates="comment_author")


class BlogPost(db.Model):
    __tablename__ = "blog_posts"
    id = db.Column(db.Integer, primary_key=True)

    author_id = db.Column(db.Integer, db.ForeignKey("users.id"))
    author = relationship("User", back_populates="posts")
    comments = relationship("Comment", back_populates="parent_post")

    title = db.Column(db.String(250), unique=True, nullable=False)
    subtitle = db.Column(db.String(250), nullable=False)
    date = db.Column(db.String(250), nullable=False)
    body = db.Column(db.Text, nullable=False)
    img_url = db.Column(db.String(250), nullable=False)


class Comment(UserMixin, db.Model):
    __tablename__ = "comments"
    id = db.Column(db.Integer, primary_key=True)
    text = db.Column(db.Text, nullable=False)

    author_id = db.Column(db.Integer, db.ForeignKey("users.id"))
    comment_author = relationship("User", back_populates="comments")
    post_id = db.Column(db.Integer, db.ForeignKey("blog_posts.id"))
    parent_post = relationship("BlogPost", back_populates="comments")


# For different icons of comments
gravatar = Gravatar(app,
                    size=100,
                    rating='g',
                    default='retro',
                    force_default=False,
                    force_lower=False,
                    use_ssl=False,
                    base_url=None)

with app.app_context():
    db.create_all()


# Create admin-only decorator
@app.route('/')
def get_all_posts():
    posts = BlogPost.query.all()
    return render_template("index.html", all_posts=posts)


@app.route('/register', methods=['GET', 'POST'])
def register():
    form = RegisterForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        if user:
            flash("You've already signed up with that email, log in instead!")
            return redirect(url_for('login'))
        new_user = User(
            email=form.email.data,
            password=generate_password_hash(form.password.data, method="pbkdf2:sha256:600000", salt_length=8),
            name=form.name.data
        )
        db.session.add(new_user)
        db.session.commit()
        login_user(user=new_user)
        return redirect(url_for('get_all_posts'))

    return render_template("register.html", form=form)


@app.route('/login', methods=['GET', 'POST'])
def login():
    form = LoginForm()
    if request.method == 'POST':
        email = form.email.data
        user = User.query.filter_by(email=email).first()
        if user and check_password_hash(user.password, form.password.data):
            login_user(user=user)
            return redirect(url_for('get_all_posts'))
        else:
            flash("Invalid credentials! Please try again.")
            return redirect(url_for('login', form=form))
    return render_template("login.html", form=form)


@app.route('/logout')
@login_required
def logout():
    logout_user()
    return redirect(url_for('get_all_posts'))


@app.route("/post/<int:post_id>", methods=['GET', 'POST'])
def show_post(post_id):
    requested_post = BlogPost.query.get(post_id)
    form = CommentForm()
    comments = Comment.query.filter_by(post_id=requested_post.id)
    if form.validate_on_submit():
        if not current_user.is_authenticated:
            flash("You need to login or register to comment.")
            return redirect(url_for('login'))
        new_comment = Comment(
            text=form.comment_body.data,
            comment_author=current_user,
            parent_post=requested_post
        )
        db.session.add(new_comment)
        db.session.commit()
    return render_template("post.html", post=requested_post, form=form, comments=comments)


@app.route("/about")
def about():
    return render_template("about.html")


@app.route('/contact', methods=['get', 'post'])
def contact():
    if request.method == 'POST':
        data = request.form
        email = data['email']
        name = data['name']
        phone_no = data['phone']
        msg = data['message']
        sendmail(email, name, phone_no, msg)
        return render_template('contact.html', msg_sent=True)
    return render_template('contact.html', msg_sent=False)


@app.route("/new-post", methods=['GET', 'POST'])
@admin_only
def add_new_post():
    form = CreatePostForm()
    if form.validate_on_submit():
        new_post = BlogPost(
            title=form.title.data,
            subtitle=form.subtitle.data,
            body=form.body.data,
            img_url=form.img_url.data,
            author=current_user,
            date=date.today().strftime("%B %d, %Y")
        )
        db.session.add(new_post)
        db.session.commit()
        return redirect(url_for("get_all_posts"))
    return render_template("make-post.html", form=form)


@app.route("/edit-post/<int:post_id>", methods=['GET', 'POST'])
@admin_only
def edit_post(post_id):
    post = BlogPost.query.get(post_id)
    edit_form = CreatePostForm(
        title=post.title,
        subtitle=post.subtitle,
        img_url=post.img_url,
        author=post.author,
        body=post.body
    )
    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 = current_user
        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)


@app.route("/delete/<int:post_id>")
@admin_only
def delete_post(post_id):
    post_to_delete = BlogPost.query.get(post_id)
    db.session.delete(post_to_delete)
    db.session.commit()
    return redirect(url_for('get_all_posts'))


if __name__ == "__main__":
    app.run(port=5000, debug=True)

# TODO 1: Fix the comment glitch where refreshing after comment adds another comment
# TODO 2: NEED to create a function for forgot password
# TODO 3: Refactor the code
# TODO 4: Add api for getting posts data