main.py

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, CreateCommentForm
from flask_gravatar import Gravatar
from functools import wraps
import os

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'] = os.environ.get("DATABASE_URL", 'sqlite:///blog.db')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)

login_manager = LoginManager()
login_manager.init_app(app)

def admin_only(func):
    @wraps(func)
    def decorated(*args, **kwargs):
        if current_user.id != 1:
            return abort(403)
        return func(*args, **kwargs)
    return decorated

gravatar = Gravatar(app,
                    size=100,
                    rating='g',
                    default='retro',
                    force_default=False,
                    force_lower=False,
                    use_ssl=False,
                    base_url=None)


##CONFIGURE TABLES

##CREATE TABLE IN DB
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="author")

#Line below only required once, when creating DB.


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 = db.Column(db.String(250), nullable=False)
    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)
    author = relationship("User", back_populates="posts")
    comments = relationship("Comment", back_populates="parent_post")

class Comment(db.Model):
    __tablename__ = "comments"
    id = db.Column(db.Integer, primary_key=True)
    author_id = db.Column(db.Integer, db.ForeignKey('users.id'))
    post_id = db.Column(db.Integer, db.ForeignKey("blog_posts.id"))
    comment_text = db.Column(db.Text, nullable=False)
    author = relationship("User", back_populates="comments")
    parent_post = relationship("BlogPost", back_populates="comments")

# db.create_all()


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

@app.route('/')
def get_all_posts():
    posts = db.session.query(BlogPost).all()
    return render_template("index.html", all_posts=posts)


@app.route('/register', methods=['POST', "GET"])
def register():
    fffform = RegisterForm()
    if fffform.validate_on_submit():
        reg_email = request.form.get('email')
        reg_password = request.form.get('password')
        check_presence = db.session.query(User).filter_by(email=reg_email).first()
        if check_presence:
            flash('User with that email already exists')
            return redirect(url_for('register'))
        else:
            hashed_p = generate_password_hash(reg_password, method='pbkdf2:sha256', salt_length=8)
            new_user = User(
                name=request.form.get('name'),
                email=reg_email,
                password=hashed_p)
            db.session.add(new_user)
            db.session.commit()
            login_user(new_user)
        return redirect(url_for('get_all_posts'))
    return render_template("register.html", form=fffform)


@app.route('/login', methods=['POST', "GET"])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        email_got = request.form.get('email')
        password_got = request.form.get('password')
        user = db.session.query(User).filter_by(email=email_got).first()
        if user:
            if check_password_hash(user.password, password_got):
                login_user(user)
                flash('You were successfully logged in')
                return redirect(url_for('get_all_posts'))
            else:
                flash('Wrong password')
                return redirect(url_for('login'))
        else:
            flash('User with that e-mail not found.')
            return redirect(url_for('login'))
    return render_template("login.html", form=form)


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


@app.route("/post/<int:post_id>", methods=['POST', "GET"])
def show_post(post_id):
    requested_post = BlogPost.query.get(post_id)
    form = CreateCommentForm()
    comments = db.session.query(Comment).filter_by(post_id=post_id).all()
    if form.validate_on_submit():
        if current_user.is_authenticated:
            comment = Comment(
                comment_text=request.form.get('comment_text'),
                author_id=current_user.id,
                post_id=post_id
            )
            db.session.add(comment)
            db.session.commit()
        else:
            flash('Login first')
            return redirect(url_for('login'))
    return render_template("post.html", post=requested_post, comments=comments, form=form)


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


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


@app.route("/new-post", methods=['POST', "GET"])
@admin_only
@login_required
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>")
@admin_only
@login_required
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 = edit_form.author.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)


@app.route("/delete/<int:post_id>")
@admin_only
@login_required
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()