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project.py
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project.py
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#!/usr/bin/env python3
from flask import Flask, render_template, request
from flask import redirect, url_for, jsonify, flash
from sqlalchemy import create_engine, asc, inspect
from sqlalchemy.orm import sessionmaker
from sqlalchemy.pool import StaticPool
from database_setup import Base, AnimalClasses, ClassFamilies, User
from flask import session as login_session
import random
import string
from apiclient import discovery
from oauth2client import client
from oauth2client.client import flow_from_clientsecrets
from oauth2client.client import FlowExchangeError
import httplib2
import json
from flask import make_response
import requests
import os
app = Flask(__name__)
# CLIENT_ID = json.loads(
# open('client_Secrets.json', 'r').read())['web']['client_id']
# APPLICATION_NAME = "udacity-animal-catalog"
PROJECT_ROOT = os.path.realpath(os.path.dirname(__file__))
json_url = os.path.join(PROJECT_ROOT, 'client_secrets.json')
CLIENT_ID = json.load(open(json_url))['web']['client_id']
# Establish connection to database and create a session
engine = create_engine('sqlite:///animalcatalog.db',
connect_args={'check_same_thread': False},
poolclass=StaticPool, echo=True)
Base.metadata.bind = engine
DBSession = sessionmaker(bind=engine)
session = DBSession()
# Create a random anti forgery state token and login user
@app.route('/login/')
def loginPage():
state = ''.join(random.choice(string.ascii_uppercase + string.digits)
for x in range(32))
login_session['state'] = state
return render_template('login.html', STATE=state, CLIENT_ID=CLIENT_ID)
# Authenticate user with Googles OAUTH2 API
@app.route('/gconnect', methods=['POST'])
def gconnect():
# Validate state token
if request.args.get('state') != login_session['state']:
response = make_response(json.dumps('Invalid state parameter.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Obtain authorization code
code = request.data.decode('utf-8')
try:
# Upgrade the authorization code into a credentials object
oauth_flow = flow_from_clientsecrets('client_secrets.json', scope='')
oauth_flow.redirect_uri = 'postmessage'
credentials = oauth_flow.step2_exchange(code)
except FlowExchangeError:
response = make_response(
json.dumps('Failed to upgrade the authorization code.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Check that the access token is valid.
access_token = credentials.access_token
url = ('https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=%s'
% access_token)
h = httplib2.Http()
result = json.loads(h.request(url, 'GET')[1])
# If there was an error in the access token info, abort.
if result.get('error') is not None:
response = make_response(json.dumps(result.get('error')), 500)
response.headers['Content-Type'] = 'application/json'
return response
# Verify that the access token is used for the intended user.
gplus_id = credentials.id_token['sub']
if result['user_id'] != gplus_id:
response = make_response(
json.dumps("Token's user ID doesn't match given user ID."), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Verify that the access token is valid for this app.
if result['issued_to'] != CLIENT_ID:
response = make_response(
json.dumps("Token's client ID does not match app's."), 401)
print ("Token's client ID does not match app's.")
response.headers['Content-Type'] = 'application/json'
return response
stored_access_token = login_session.get('access_token')
stored_gplus_id = login_session.get('gplus_id')
if stored_access_token is not None and gplus_id == stored_gplus_id:
response = make_response(json.dumps('User is already connected'),
200)
response.headers['Content-Type'] = 'application/json'
return response
# Store the access token in the session for later use.
login_session['access_token'] = credentials.access_token
login_session['gplus_id'] = gplus_id
# Get user info
userinfo_url = "https://www.googleapis.com/oauth2/v1/userinfo"
params = {'access_token': credentials.access_token, 'alt': 'json'}
answer = requests.get(userinfo_url, params=params)
data = answer.json()
login_session['username'] = data['name']
login_session['picture'] = data['picture']
login_session['email'] = data['email']
print("LOGIN SESSION %s" % login_session['username'])
# Check if user exists
user_id = getUserID(login_session['email'])
print("User id is %s" % user_id)
if not user_id:
user_id = createUser(login_session)
login_session['user_id'] = user_id
print("User id from login_session is %s" % login_session['user_id'])
output = ''
output += '<h1>Welcome, '
output += login_session['username']
output += '!</h1>'
output += '<img src="'
output += login_session['picture']
output += """ ' " style = "width: 300px; height: 300px;
border-radius: 150px;-webkit-border-radius: 150px;
-moz-border-radius: 150px;"> ' """
flash("you are now logged in as %s" % login_session['username'])
print("done!")
return output
# User Management Functions
def createUser(login_session):
newUser = User(name=login_session['username'], email=login_session[
'email'], picture=login_session['picture'])
session.add(newUser)
session.commit()
user = session.query(User).filter_by(email=login_session['email']).one()
return user.id
def getUserInfo(user_id):
user = session.query(User).filter_by(id=user_id).one_or_none()
return user
def getUserID(email):
try:
user = session.query(User).filter_by(email=email).one()
return user.id
except BaseException:
print("User ID not found")
return None
# Reset login_session after logging out
@app.route('/logout/')
def logoutPage():
gdisconnect()
del login_session['access_token']
del login_session['gplus_id']
del login_session['username']
del login_session['email']
del login_session['picture']
flash('Successfully logged out')
return redirect(url_for('showAnimalClasses'))
# For Google OAUTH users reset token and login_session
@app.route('/gdisconnect')
def gdisconnect():
# Check for current connection
access_token = login_session.get('access_token')
if access_token is None:
response = make_response(
json.dumps('Current user not connected.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
url = 'https://accounts.google.com/o/oauth2/revoke?token=%s' % access_token
h = httplib2.Http()
result = h.request(url, 'GET')[0]
if result['status'] == '200':
response = make_response(json.dumps('Successfully disconnected.'), 200)
response.headers['Content-Type'] = 'application/json'
return response
else:
# For whatever reason, the given token was invalid.
response = make_response(
json.dumps('Failed to revoke token for given user.', 400))
response.headers['Content-Type'] = 'application/json'
return response
@app.route('/classes/<int:animal_class_id>/family/JSON')
def classFamilyJSON(animal_class_id):
animal_class = (session.query(AnimalClasses).
filter_by(id=animal_class_id).one())
class_family = (session.query(ClassFamilies).
filter_by(animal_class_id=animal_class_id).all())
return jsonify(ClassFamilies=[i.serialize for i in class_family])
@app.route('/classes/JSON')
def animalClassJSON():
animal_class = (session.query(AnimalClasses).all())
return jsonify(AnimalClasses=[i.serialize for i in animal_class])
@app.route('/classes/<int:animal_class_id>/family/<int:animal_family_id>/JSON')
def singleAnimalFamilyJSON(animal_class_id, animal_family_id):
class_family = (session.query(ClassFamilies).
filter_by(animal_class_id=animal_class_id).
filter_by(id=animal_family_id).
all())
return jsonify(AnimalClasses=[i.serialize for i in class_family])
# Summary of all animal classes added to the DB
@app.route('/')
@app.route('/classes/')
def showAnimalClasses():
"""Load main page which has an overview of all animal classes"""
animal_classes = session.query(AnimalClasses)
animal_families = session.query(ClassFamilies).join(AnimalClasses).all()
try:
return (render_template('animalClasses.html',
animal_classes=animal_classes,
user_name=login_session['username'],
user_id=login_session['user_id'],
animal_families=animal_families))
except KeyError:
return (render_template('animalClasses.html',
animal_classes=animal_classes,
animal_families=animal_families))
# Create a new animal class
@app.route('/classes/new/', methods=['GET', 'POST'])
def newAnimalClass():
"""Create a new class"""
if 'username' not in login_session:
return redirect('/login')
if request.method == "POST":
newClass = (AnimalClasses(name=request.form['name'],
link=request.form['link'],
user_id=login_session['user_id'],
))
session.add(newClass)
flash('Class %s successfully added to the Ark' % newClass.name)
session.commit()
return redirect(url_for('showAnimalClasses'))
else:
return render_template('newAnimalClass.html',
user_name=login_session['username'])
# Edit an existing animal class
@app.route('/classes/<int:animal_class_id>/edit/', methods=['GET', 'POST'])
def editAnimalClass(animal_class_id):
if 'username' not in login_session:
return redirect('/login')
animalClassToEdit = (session.query(AnimalClasses).
filter_by(id=animal_class_id).one())
creator = getUserInfo(animalClassToEdit.user_id)
if creator.id != login_session['user_id']:
flash('You did not create this class and thus cannot edit it')
return redirect(url_for('showAnimalClasses'))
else:
if request.method == "POST":
if request.form['name']:
animalClassToEdit.name = request.form['name']
if request.form['link']:
animalClassToEdit.link = request.form['link']
session.add(animalClassToEdit)
flash('Class %s successfully edited' % animalClassToEdit.name)
session.commit()
return redirect(url_for('showAnimalClasses'))
else:
try:
return (render_template('editAnimalClass.html',
animal_class=animalClassToEdit,
animal_class_id=animal_class_id,
user_name=login_session['username']))
except KeyError:
return (render_template('editAnimalClass.html',
animal_class=animalClassToEdit,
animal_class_id=animal_class_id))
# Delete an existing animal class
@app.route('/classes/<int:animal_class_id>/delete/', methods=['GET', 'POST'])
def deleteAnimalClass(animal_class_id):
if 'username' not in login_session:
return redirect('/login')
animalClassToDelete = (session.query(AnimalClasses).
filter_by(id=animal_class_id).one())
creator = getUserInfo(animalClassToDelete.user_id)
if creator.id != login_session['user_id']:
flash('You did not create this class and thus cannot delete it')
return redirect(url_for('showAnimalClasses'))
else:
if request.method == "POST":
session.delete(animalClassToDelete)
flash('Class %s successfully deleted' % animalClassToDelete.name)
session.commit()
return redirect(url_for('showAnimalClasses'))
else:
return (render_template('deleteAnimalClass.html',
animal_class=animalClassToDelete,
animal_class_id=animal_class_id,
user_name=login_session['username']))
@app.route('/classes/<int:animal_class_id>/')
@app.route('/classes/<int:animal_class_id>/family/')
def showClassFamilies(animal_class_id):
animal_classes = session.query(AnimalClasses)
animal_class = (session.query(AnimalClasses).
filter_by(id=animal_class_id).one())
class_family = (session.query(ClassFamilies).
filter_by(animal_class_id=animal_class_id).all())
creator = getUserInfo(animal_class.user_id)
try:
if ('username' not in login_session or
creator.id != login_session['user_id']):
return (render_template('animalFamilyPublic.html',
animal_classes=animal_classes,
animal_class_id=animal_class_id,
class_family=class_family,
animal_class=animal_class,
creator=creator,
user_id=login_session['user_id'],
user_name=login_session['username']))
else:
return (render_template('animalFamily.html',
animal_classes=animal_classes,
animal_class_id=animal_class_id,
class_family=class_family,
animal_class=animal_class,
creator=creator,
user_name=login_session['username']))
except KeyError:
return (render_template('animalFamily.html',
animal_classes=animal_classes,
animal_class_id=animal_class_id,
class_family=class_family,
animal_class=animal_class,
creator=creator))
except AttributeError:
return (render_template('animalFamily.html',
animal_classes=animal_classes,
animal_class_id=animal_class_id,
class_family=class_family,
animal_class=animal_class,
creator=creator,
user_name=login_session['username']))
@app.route('/classes/<int:animal_class_id>/family/new/',
methods=['GET', 'POST'])
def newAnimalFamily(animal_class_id):
if 'username' not in login_session:
return redirect('/login')
animal_class = (session.query(AnimalClasses).
filter_by(id=animal_class_id).one())
creator = getUserInfo(animal_class.user_id)
if creator.id != login_session['user_id']:
flash('You did not create this class and cannot add a family to it')
return redirect(url_for('showClassFamilies',
animal_class_id=animal_class_id))
else:
if request.method == "POST":
newFamily = ClassFamilies(name=request.form['name'],
description=request.form['description'],
animal_class_id=animal_class_id,
distinctive_feature=(request.form
['distinctive_'
'feature']
),
quantity_on_board=(request.form
['quantity_on'
'_board']),
male_female=request.form['male_female'],
user_id=login_session['user_id'])
session.add(newFamily)
flash('Animal family %s successfully added' % newFamily.name)
session.commit()
return (redirect(url_for('showClassFamilies',
animal_class_id=animal_class_id)))
else:
return (render_template('newAnimalFamily.html',
animal_class_id=animal_class_id,
animal_class=animal_class))
@app.route('/classes/<int:animal_class_id>/family/'
'<int:animal_family_id>/edit/',
methods=['GET', 'POST'])
def editAnimalFamily(animal_class_id, animal_family_id):
if 'username' not in login_session:
return redirect('/login')
animalFamilyToEdit = (session.query(ClassFamilies).
filter_by(id=animal_family_id).one())
creator = getUserInfo(animalFamilyToEdit.user_id)
if creator.id != login_session['user_id']:
flash('You did not create this family and thus cannot edit it')
return redirect(url_for('showClassFamilies',
animal_class_id=animal_class_id))
else:
if request.method == "POST":
if request.form['name']:
animalFamilyToEdit.name = request.form['name']
if request.form['description']:
animalFamilyToEdit.description = request.form['description']
if request.form['quantity_on_board']:
animalFamilyToEdit.quantity_on_board = (request.
form['quantity_on_'
'board'])
if request.form['male_female']:
animalFamilyToEdit.male_female = request.form['male_female']
if request.form['distinctive_feature']:
animalFamilyToEdit.distinctive_feature = (request.form
['distinctive_'
'feature'])
session.add(animalFamilyToEdit)
flash('Animal family %s successfully edited'
% animalFamilyToEdit.name)
session.commit()
return (redirect(url_for('showClassFamilies',
animal_class_id=animal_class_id)))
else:
return (render_template('editAnimalFamily.html',
animal_family=animalFamilyToEdit,
animal_class_id=animal_class_id,
animal_family_id=animal_family_id))
@app.route('/classes/<int:animal_class_id>'
'/family/<int:animal_family_id>/delete/',
methods=['GET', 'POST'])
def deleteAnimalFamily(animal_class_id, animal_family_id):
if 'username' not in login_session:
return redirect('/login')
animalFamilyToDelete = (session.query(ClassFamilies).
filter_by(id=animal_family_id).one())
creator = getUserInfo(animalFamilyToDelete.user_id)
if creator.id != login_session['user_id']:
flash('You did not create this family and thus cannot delete it')
return redirect(url_for('showAnimalFamilies',
animal_class_id=animal_class_id,
animal_family_id=animal_family_id))
else:
if request.method == "POST":
session.delete(animalFamilyToDelete)
flash('Family %s successfully deleted' % animalFamilyToDelete.name)
session.commit()
return (redirect(url_for('showClassFamilies',
animal_class_id=animal_class_id)))
else:
return (render_template('deleteAnimalFamily.html',
animal_family=animalFamilyToDelete,
animal_class_id=animal_class_id,
animal_family_id=animal_family_id))
@property
def serialize(self):
return {'name': self.name, 'image URL': self.link, 'id': self.id}
if __name__ == '__main__':
app.secret_key = 'super_secret_key'
app.debug = True
app.run(host='0.0.0.0', port=8000)