main.py

from flask import Flask, render_template, request, session, redirect
from flask_sqlalchemy import SQLAlchemy
from flask_mail import Mail
import json
from datetime import datetime
import math  # for pagination

with open('config.json', 'r') as c:
    params = json.load(c)["params"]

app = Flask(__name__)
app.secret_key = 'super-secret-key'

app.config.update(
    MAIL_SERVER='smtp.gmail.com',
    MAIL_PORT='465',
    MAIL_USE_SSL='True',
    MAIL_USERNAME=params['gmail-user'],
    MAIL_PASSWORD=params['gmail-password']
)
mail = Mail(app)
local_server = True
if (local_server):
    app.config['SQLALCHEMY_DATABASE_URI'] = params['local_uri']
else:
    app.config['SQLALCHEMY_DATABASE_URI'] = params['prod_uri']

db = SQLAlchemy(app)


class Contacts(db.Model):
    srno = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    phone_num = db.Column(db.String(12), nullable=False)
    email = db.Column(db.String(30), nullable=False)
    msg = db.Column(db.String(120), nullable=False)
    date = db.Column(db.String(12), nullable=True)


class Posts(db.Model):
    srno = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(80), nullable=False)
    tagline = db.Column(db.String(80), nullable=False)
    slug = db.Column(db.String(30), nullable=False)
    content = db.Column(db.String(300), nullable=False)
    img_file = db.Column(db.String(30), nullable=False)
    date = db.Column(db.String(12), nullable=True)


@app.route('/')
def home():
    posts = Posts.query.filter_by().all()
    last = math.ceil(len(posts) / int(params["no-of-posts"]))  # Here we are taking greatest integer
    # pagination logic
    page = request.args.get('page')
    if (not str(page).isnumeric()):  # if page_num is not numeric then make it 1
        page = 1
    page=int(page)
    posts = posts[(page - 1) * int(params["no-of-posts"]): (page - 1) * int(params["no-of-posts"]) + int(
        params["no-of-posts"])]

    if  page == 1:
        prev = "#"
        next = "/?page=" + str(page + 1)

    elif (page == last):
        prev = "/?page=" + str(page - 1)
        next = "#"

    else:
        prev = "/?page=" + str(page - 1)
        next = "/?page=" + str(page + 1)

    return render_template('index.html', params=params, posts=posts, prev=prev, next=next)


@app.route('/about')
def about():
    return render_template('about.html', params=params)


@app.route('/dashboard', methods=['GET', 'POST'])
def dashboard():
    if 'user' in session and session['user'] == params["admin_user"]:
        posts = Posts.query.all()
        return render_template('dashboard.html', params=params, posts=posts)

    if request.method == "POST":
        username = request.form.get('uname')
        userpass = request.form.get('pass')
        if username == params["admin_user"] and userpass == params["admin_password"]:
            session['user'] = username
            posts = Posts.query.all()
            return render_template('dashboard.html', params=params, posts=posts)

    else:
        return render_template('login.html', params=params)


@app.route('/logout')
def logout():
    session.pop('user')
    return redirect('/dashboard')


@app.route('/contact', methods=["GET", "POST"])
def contact():
    if request.method == "POST":
        name = request.form.get('name')
        email = request.form.get('email')
        phone = request.form.get('phone')
        message = request.form.get('message')
        entry = Contacts(name=name, phone_num=phone, email=email, msg=message, date=datetime.now())
        db.session.add(entry)
        db.session.commit()

        mail.send_message("new message from blog" + name,
                          sender=email,
                          recipients=[params['gmail-user']],
                          body=message + "\n" + phone
                          )
    return render_template('contact.html', params=params)


@app.route('/post/<string:post_slug>', methods=['GET'])
def post_route(post_slug):
    post = Posts.query.filter_by(slug=post_slug).first()
    return render_template('post.html', params=params, post=post)


@app.route("/edit/<string:srno>", methods=['GET', 'POST'])
def edit(srno):
    if 'user' in session and session['user'] == params["admin_user"]:
        if request.method == 'POST':
            box_title = request.form.get('title')
            tagline = request.form.get('tagline')
            slug = request.form.get('slug')
            content = request.form.get('content')
            img_file = request.form.get('img_file')
            date = datetime.now()

            if srno == '0':
                post = Posts(title=box_title, tagline=tagline, slug=slug, img_file=img_file, content=content, date=date)
                db.session.add(post)
                db.session.commit()

            else:
                post = Posts.query.filter_by(srno=srno).first()
                post.title = box_title
                post.tagline = tagline
                post.slug = slug
                post.img_file = img_file
                post.content = content
                post.date = date
                db.session.commit()
                return redirect('/edit/' + srno)

        post = Posts.query.filter_by(srno=srno).first()
        return render_template('edit.html', params=params, post=post, srno=srno)


@app.route("/delete/<string:srno>", methods=['GET', 'POST'])
def delete(srno):
    if 'user' in session and session['user'] == params["admin_user"]:
        post = Posts.query.filter_by(srno=srno).first()
        db.session.delete(post)
        db.session.commit()
        return redirect('/dashboard')


app.run(debug=True)