views.py

from flask import Blueprint,render_template,request,flash,jsonify
from flask_login import login_required,current_user
import json
from .models import Note
from . import db
views = Blueprint('views',__name__)

@views.route('/',methods=['GET',"POST"])
@login_required #This decorator means you can't enter in homepage unless you are login
def home(): 
    if request.method == "POST":
        note = request.form.get('note')
    
        if len(note) < 1:
            flash('Note too short',category='error')
        else:
            new_node = Note(userNote=note,user_id=current_user.id)
            db.session.add(new_node)
            db.session.commit()
            flash("Note added!",category='success')

    return render_template('home.html',user=current_user)


@views.route('/delete-note',methods=["POST"])
def delete_note():
    note = json.loads(request.data)
    noteId = note['noteId']
    note = Note.query.get(noteId)

    if note:
        if note.user_id == current_user.id:
            # To verify only current signin user is deleting his notes not other ones
            db.session.delete(note)
            db.session.commit()
        
    return jsonify({})
    """
    when user delete a note it's done by post method so 
    request.data is for reteriving the data which is deleted & we are loading 
    only that data with help of json.loads(request.data)

    noteId = note['noteId']
    Here we are storing the noteId that was passed with fetch in js file
    """