main.py

from flask import Flask, render_template, redirect, url_for, flash, g, request, abort, wrappers
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
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Table, Column, Integer, ForeignKey
import os

app = Flask(__name__)
app.config['SECRET_KEY'] = os.environ.get("SECRET")
ckeditor = CKEditor(app)
Bootstrap(app)
login_manager = LoginManager()
login_manager.init_app(app)

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

##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)


##CONFIGURE TABLES

class BlogPost(db.Model):
    __tablename__ = "blog_posts"
    id = db.Column(db.Integer, primary_key=True)
    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_id = Column(Integer, ForeignKey("user.id"))
    author = relationship("User", back_populates="posts")
    comments = relationship("Comment", back_populates="post")




class User(db.Model, UserMixin):
    __tablename__ = "user"
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(250), nullable=False, unique=True)
    password = db.Column(db.String(250), nullable=False)
    name = db.Column(db.String(250), nullable=False)
    posts = relationship("BlogPost", back_populates="author")
    comments = relationship("Comment", back_populates="comment_author")


class Comment(db.Model):
    __tablename__ = 'comments'
    id = db.Column(db.Integer, primary_key=True)
    text = db.Column(db.String(300))
    author_id = Column(Integer, ForeignKey("user.id"))
    comment_author = relationship("User", back_populates="comments")
    post = relationship("BlogPost", back_populates="comments")
    post_id = Column(Integer, ForeignKey("blog_posts.id"))
db.create_all()

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

def admin_only(function):
    @wraps(function)
    def wrapper(*args, **kwargs):
        if current_user.is_authenticated:
            if current_user.id == 1:
                return function(*args, **kwargs)
            else:
                return abort(403)
        else:
            return abort(403)
    return wrapper


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


@app.route('/register', methods=["POST", "GET"])
def register():
    register_form = RegisterForm()
    if register_form.validate_on_submit():
        hash = generate_password_hash(register_form.password.data,"pbkdf2:sha256", 8)
        new_user = User(email=register_form.email.data,
                        password=hash, name = register_form.name.data)
        db.session.add(new_user)
        db.session.commit()
        login_user(new_user)
        return redirect(url_for('get_all_posts'))
    else:
        return render_template("register.html", form=register_form)


@app.route('/login', methods=['POST', 'GET'])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        pass_match = check_password_hash(user.password, form.password.data)
        if user and pass_match:
            login_user(user)
            return redirect(url_for('get_all_posts'))
        else:
            return redirect(url_for('register'))
    else:
        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)
    comment_form = CommentForm()
    if comment_form.validate_on_submit():
        if current_user.is_authenticated:
            text = comment_form.text.data
            new_comment = Comment(text=text, comment_author = current_user, post_id = post_id)
            db.session.add(new_comment)
            db.session.commit()
            return redirect(url_for(f"show_post", post=requested_post, form=comment_form, post_id = post_id, current_user=current_user))
        else:
            flash("You have to log in if you want to comment.")
            return redirect(url_for('login'))
    else:
        return render_template("post.html", post=requested_post, form=comment_form, current_user=current_user)


@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
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
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)


@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(host='0.0.0.0', port=5000, debug=True)