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server.py
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server.py
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import bcrypt
from flask import Flask, flash, render_template, request, redirect, url_for, send_from_directory, session
from datetime import datetime
import db_data_handler
import util
from bonus_questions import SAMPLE_QUESTIONS
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = util.UPLOAD_FOLDER
app.config['SECRET_KEY'] = util.SECRET_KEY
@app.route('/search')
@app.route('/list')
@app.route('/')
def list_questions():
db_questions = db_data_handler.get_five_latest_questions()
if 'list' in request.url_rule.rule:
db_questions = db_data_handler.get_questions()
order_by, order_direction = util.get_sorting_values()
db_questions.sort(key=lambda question: question[order_by], reverse=(order_direction == 'desc'))
is_logged_in = False
if 'username' in session:
is_logged_in = True
session['question_id'] = None
return render_template('list.html', questions=db_questions,
order_by=order_by, order_direction=order_direction,
results=db_data_handler.search_database(request.args.get('q')),
answers=db_data_handler.get_search_answers(request.args.get('q')),
tags=db_data_handler.get_tags(), question_tags=db_data_handler.get_question_tags(),
is_logged_in=is_logged_in,
username=session.get('username'))
@app.route('/users')
def users():
if 'username' not in session:
flash('Please login to see the user list')
return redirect(url_for('login'))
if request.method == 'GET':
comment_and_answer = db_data_handler.count_user_questions_comments_and_answers()
return render_template('users.html', comment_and_answer=comment_and_answer)
return redirect(url_for('list_questions'))
@app.route('/user/<user_id>')
def display_profile(user_id):
if 'username' not in session:
flash('Please login to see the user page')
return redirect(url_for('list_questions'))
count_all_user_questions = db_data_handler.count_all_user_questions(user_id)
count_all_user_answers = db_data_handler.count_all_user_answers(user_id)
count_all_user_comments = db_data_handler.count_all_user_comments(user_id)
user = db_data_handler.get_user(user_id)
return render_template('profile.html',
count_all_user_questions=count_all_user_questions,
count_all_user_answers=count_all_user_answers,
count_all_user_comments=count_all_user_comments,
questions=db_data_handler.get_user_questions(user_id),
answers=db_data_handler.get_user_answers(user_id),
comments=db_data_handler.get_user_comments(user_id),
user=user)
@app.route('/registration', methods=['GET', 'POST'])
def registration():
if request.method == 'GET':
return render_template('registration.html')
elif request.method == 'POST':
username = request.form.get('username')
password = bcrypt.hashpw((request.form.get('password')).encode('utf-8'), bcrypt.gensalt()).decode('utf-8')
db_data_handler.register_user({'username': username, 'password': password, 'date': db_data_handler.NOW})
return redirect(url_for('list_questions'))
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
username, password = request.form.get('username'), request.form.get('password')
user_hash = db_data_handler.users(username)
if user_hash is not None:
if bcrypt.checkpw(password.encode('utf-8'), user_hash['passwordhash'].encode('utf-8')):
session['user_id'], session['username'] = user_hash['id'], username
if session['question_id'] is not None:
return redirect(url_for('display_question', question_id=session['question_id']))
return redirect(url_for('list_questions'))
flash('Bad login attempt. The username or password is invalid.')
return render_template('login.html')
@app.route('/logout')
def logout():
session.clear()
flash('Successfully logged out')
return redirect(url_for('list_questions'))
@app.route('/bonus-questions')
def bonus_questions():
return render_template('bonus_questions.html', questions=SAMPLE_QUESTIONS)
@app.route('/question/<question_id>')
def display_question(question_id):
if request.method == 'GET':
question = db_data_handler.get_question_data(question_id)
db_data_handler.increase_question_view_count(question['id'])
comments_question = db_data_handler.get_comment_for_question(question_id)
session['question_id'] = question_id
if request.args.get('change_answer_status'):
if 'username' not in session:
flash("You need to be logged in.")
elif session['user_id'] == question.get("author_id"):
db_data_handler.change_answer_acceptance_status(session['user_id'], request.args.get('answer_id'))
else:
flash("Only the question author can accept answers or withdrawal acceptance.")
return render_template('question.html', question=question,
answers=db_data_handler.get_answer_for_question(question_id),
tags=db_data_handler.get_tags(),
question_tags=db_data_handler.get_question_tag_ids(question_id),
comments_question=comments_question,
comments_answer=db_data_handler.get_comment_data(question_id))
@app.route('/add-question', methods=['GET', 'POST'])
def add_question():
if 'username' not in session:
flash('You must be logged in to add a new question!')
return redirect(url_for('list_questions'))
if request.method == 'GET':
return render_template('add-question.html')
if request.method == 'POST':
author_id = session['user_id']
new_question = db_data_handler.save_new_question_data({
'title': request.form.get('title', default='not provided'),
'message': request.form.get('message', default='not provided'),
'image': util.upload_image(), 'author_id': author_id})
return redirect(url_for('display_question', question_id=new_question.get('id')))
@app.route('/question/<question_id>/delete')
def delete_question(question_id):
util.image_delete_from_server(db_data_handler.get_question_data(question_id))
tags = db_data_handler.get_question_tag_ids(question_id)
if tags:
for tag in tags:
db_data_handler.delete_tag_from_question(question_id, tag.get('tag_id'))
answers = db_data_handler.get_answer_for_question(question_id)
if answers:
for answer in answers:
util.image_delete_from_server(answer)
comments = db_data_handler.get_comment_for_answer(answer.get('id'))
for comment in comments:
db_data_handler.delete_comment(comment.get('id'))
db_data_handler.delete_answer(answer.get('id'))
db_data_handler.delete_question_comment(question_id)
db_data_handler.delete_question(question_id)
return redirect(url_for('list_questions'))
@app.route('/question/<question_id>/edit', methods=['GET', 'POST'])
def edit_question(question_id):
question = db_data_handler.get_question_data(question_id)
tag_ids, tags = db_data_handler.get_question_tag_ids(question_id), db_data_handler.get_tags()
if request.method == 'GET':
return render_template('edit-question.html', question=question, tag_ids=tag_ids, tags=tags)
elif request.method == 'POST':
if question['image'] is None:
question['image'] = util.upload_image()
db_data_handler.edit_question({'id': question_id,
'title': request.form.get('title'),
'message': request.form.get('message'),
'image': question['image']})
return redirect(url_for('display_question', question_id=question_id))
# ------------------- TAGS ---------------------- #
@app.route('/tags')
@app.route('/tags/<tag_id>')
def display_tags(tag_id=None):
questions = db_data_handler.filter_questions_by_tag(tag_id)
return render_template('tags.html', tags=db_data_handler.count_questions_with_tag(), questions=questions)
@app.route('/question/<question_id>/new-tag', methods=['GET', 'POST'])
def add_tag_to_question(question_id):
question = db_data_handler.get_question_data(question_id)
if request.method == 'GET':
question_tags = db_data_handler.get_question_tag_ids(question_id)
unassigned_tags = db_data_handler.get_unassigned_tags(question_id)
return render_template('add-tag.html', question=question, tags=unassigned_tags, question_tags=question_tags)
elif request.method == 'POST':
name = request.form.get('add_tag')
if util.already_exists(name):
flash(f'"{name.capitalize()}" already exists! Only enter a name for a tag that does not exist.')
flash('Choose a new tag by clicking on a button to assign the tag to the question.')
return redirect(url_for('add_tag_to_question', question_id=question_id))
tag_id = request.form.get('tag'),
if name:
db_data_handler.create_new_tag(name)
tag_id = db_data_handler.get_tag_id(name)
tag_id = tag_id.get('id')
db_data_handler.assign_tag_to_question(question_id, tag_id)
return redirect(url_for('display_question', question_id=question_id))
@app.route('/question/<question_id>/tag/<tag_id>/delete')
def delete_tag_from_question(question_id, tag_id):
db_data_handler.delete_tag_from_question(question_id, tag_id)
return redirect(url_for('display_question', question_id=question_id))
# ------------------- ANSWERS ---------------------- #
@app.route('/question/<question_id>/new-answer', methods=['GET', 'POST'])
def add_answer(question_id):
if 'username' not in session:
flash('You must be logged in to add an answer!')
return redirect(url_for('display_question', question_id=question_id))
if request.method == 'GET':
question = db_data_handler.get_question_data(question_id)
answers = db_data_handler.get_answer_for_question(question_id)
question['id'] = str(question.get('id'))
return render_template('add-answer.html', question=question, answers=answers)
elif request.method == 'POST':
author_id = session['user_id']
db_data_handler.save_answer_data({'message': request.form.get('message'), 'question_id': question_id,
'image': util.upload_image(), 'author_id': author_id})
return redirect(url_for('display_question', question_id=question_id))
@app.route('/answer/<answer_id>/delete')
def delete_answer(answer_id):
question_id = db_data_handler.get_answer_data(answer_id).get('question_id')
util.image_delete_from_server(db_data_handler.get_answer_data(answer_id))
db_data_handler.delete_answer(answer_id)
return redirect(url_for('display_question', question_id=question_id))
# ------------------- COMMENTS ---------------------- #
@app.route('/question/<question_id>/new-comment', methods=['GET', 'POST'])
def add_comment_to_question(question_id):
if 'username' not in session:
flash('You must be logged in to comment a question')
return redirect(url_for('display_question', question_id=question_id))
if request.method == 'GET':
return render_template('new-comment.html', question=db_data_handler.get_question_data(question_id))
if request.method == 'POST':
db_data_handler.add_comment_to_question(
{'message': request.form.get('message'),
'question_id': question_id,
'submission_time': datetime.now(),
'author': db_data_handler.get_author_id(session['username']).get("id"),
'edited_count': 0})
return redirect(url_for('display_question', question_id=question_id))
@app.route('/answer/<answer_id>/new-comment', methods=['GET', 'POST'])
def add_comment_to_answer(answer_id):
question_id = db_data_handler.get_question_id(answer_id)
if 'username' not in session:
flash('You must be logged in to comment')
return redirect(url_for('display_question', question_id=question_id.get('question_id')))
if request.method == 'GET':
return render_template('new-comment.html',
question=db_data_handler.get_question_data(question_id.get('question_id')))
elif request.method == 'POST':
db_data_handler.add_comment_to_answer(
{'message': request.form.get('message'),
'answer_id': answer_id,
'submission_time': datetime.now(),
'author': db_data_handler.get_author_id(session['username']).get('id'),
'edited_count': 0})
return redirect(url_for('display_question', question_id=question_id.get('question_id')))
@app.route('/comments/<comment_id>/delete', methods=['GET', 'POST'])
def delete_comment(comment_id):
question_id = request.args.get('question_id')
if request.method == 'GET':
return render_template('delete-comment.html', comment_id=comment_id,
question_id=question_id)
if request.method == "POST":
decision = request.form.get('confirm')
if decision == "True":
if question_id:
db_data_handler.delete_question_comment(question_id, comment_id)
answer_id = db_data_handler.get_answer_id_from_comment(comment_id)
if answer_id:
db_data_handler.delete_answer_comment(answer_id.get('answer_id'), comment_id)
return redirect(url_for('display_question', question_id=question_id))
# ------------------- VOTES ---------------------- #
@app.route('/question/<question_id>/vote-up')
def increase_question_vote(question_id):
db_data_handler.increase_question_vote(question_id)
return redirect(url_for('list_questions'))
@app.route('/question/<question_id>/vote-down')
def decrease_question_vote(question_id):
db_data_handler.decrease_question_vote(question_id)
return redirect(url_for('list_questions'))
@app.route('/answer/<answer_id>/vote-up')
def increase_answer_vote(answer_id):
answer = db_data_handler.increase_answer_vote(answer_id)
return redirect(url_for('display_question', question_id=answer.get('question_id')))
@app.route('/answer/<answer_id>/vote-down')
def decrease_answer_vote(answer_id):
answer = db_data_handler.decrease_answer_vote(answer_id)
return redirect(url_for('display_question', question_id=answer.get('question_id')))
# ------------------- IMAGE ---------------------- #
@app.route('/uploads/<filename>')
def uploaded_file(filename):
return send_from_directory(app.config['UPLOAD_FOLDER'], filename)
@app.route('/question/<question_id>/delete-image')
def edit_delete_image(question_id):
question = db_data_handler.get_question_data(question_id)
util.image_delete_from_server(question)
question['image'] = None
db_data_handler.edit_question(question)
return redirect('/question/' + question_id + '/edit')
if __name__ == '__main__':
app.run(
host='0.0.0.0',
port=8000,
debug=True,
)