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application.py
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application.py
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from flask import Flask, render_template, url_for, request
from flask import redirect, jsonify, make_response, flash
from flask import session as login_session
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from database_setup import Base, Category, CategoryItem, User
import random
import string
import json
import httplib2
import requests
from oauth2client.client import flow_from_clientsecrets, FlowExchangeError
app = Flask(__name__)
# Connect to Database
engine = create_engine('sqlite:///itemcatalog.db')
Base.metadata.bind = engine
# Create database session
DBSession = sessionmaker(bind=engine)
session = DBSession()
# User Helper 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
# Get id from User Logged in
def getUserInfo(user_id):
user = session.query(User).filter_by(id=user_id).one()
return user
# Get e-mail from user Logged in
def getUserID(email):
try:
user = session.query(User).filter_by(email=email).one()
return user.id
except:
return None
# Show Home page, with all items of udacity Course Catalog
@app.route('/')
@app.route('/catalog')
def showCategories():
# Get all categories
categories = session.query(Category).all()
# Get lastest items added
categoryItems = session.query(CategoryItem).all()
return render_template('categories.html', categories=categories,
categoryItems=categoryItems)
# Show items of a specific category
@app.route('/catalog/<int:catalog_id>')
@app.route('/catalog/<int:catalog_id>/items')
def showCategory(catalog_id):
# Get all categories
categories = session.query(Category).all()
# Get category
category = session.query(Category).filter_by(id=catalog_id).first()
# Get name of category
categoryName = category.name
# Get all items of a specific category
categoryItems = session.query(
CategoryItem
).filter_by(
category_id=catalog_id
).all()
# Get count of category items
categoryItemsCount = session.query(
CategoryItem
).filter_by(
category_id=catalog_id
).count()
return render_template('category.html', categories=categories,
categoryItems=categoryItems,
categoryName=categoryName,
categoryItemsCount=categoryItemsCount
)
# Show the item's information detailed and show the edit and delete options
# if User Logged in is the its creator
@app.route('/catalog/<int:catalog_id>/items/<int:item_id>')
def showCategoryItem(catalog_id, item_id):
# Get category item
categoryItem = session.query(CategoryItem).filter_by(id=item_id).first()
# Get creator of item
creator = getUserInfo(categoryItem.user_id)
return render_template('categoryItem.html',
categoryItem=categoryItem,
creator=creator
)
# Add a new item if there is an user logged in
@app.route('/catalog/add', methods=['GET', 'POST'])
def addCategoryItem():
# Check if user is logged in
if 'username' not in login_session:
return redirect('/login')
if request.method == 'POST':
# TODO: Retain data when there is an error
if not request.form['name']:
flash('Please add a course name')
return redirect(url_for('addCategoryItem'))
if not request.form['description']:
flash('Please add a description')
return redirect(url_for('addCategoryItem'))
# Add category item
newCategoryItem = CategoryItem(
name=request.form['name'],
description=request.form['description'],
category_id=request.form['category'],
user_id=login_session['user_id']
)
session.add(newCategoryItem)
session.commit()
return redirect(url_for('showCategories'))
else:
# Get all categories
categories = session.query(Category).all()
return render_template('addCategoryItem.html', categories=categories)
# Edit an item if the user logged in is the its creator
@app.route('/catalog/<int:catalog_id>/items/<int:item_id>/edit',
methods=['GET', 'POST'])
def editCategoryItem(catalog_id, item_id):
# Check if user is logged in
if 'username' not in login_session:
return redirect('/login')
# Get category item
categoryItem = session.query(CategoryItem).filter_by(id=item_id).first()
# Get creator of item
creator = getUserInfo(categoryItem.user_id)
# Check if logged in user is creator of category item
if creator.id != login_session['user_id']:
return redirect('/login')
# Get all categories
categories = session.query(Category).all()
if request.method == 'POST':
if request.form['name']:
categoryItem.name = request.form['name']
if request.form['description']:
categoryItem.description = request.form['description']
if request.form['category']:
categoryItem.category_id = request.form['category']
return redirect(url_for('showCategoryItem',
catalog_id=categoryItem.category_id,
item_id=categoryItem.id
)
)
else:
return render_template('editCategoryItem.html',
categories=categories,
categoryItem=categoryItem
)
# Delete an item if the user logged in is the its creator
@app.route('/catalog/<int:catalog_id>/items/<int:item_id>/delete',
methods=['GET', 'POST'])
def deleteCategoryItem(catalog_id, item_id):
# Check if user is logged in
if 'username' not in login_session:
return redirect('/login')
# Get category item
categoryItem = session.query(CategoryItem).filter_by(id=item_id).first()
# Get creator of item
creator = getUserInfo(categoryItem.user_id)
# Check if logged in user is creator of category item
if creator.id != login_session['user_id']:
return redirect('/login')
if request.method == 'POST':
session.delete(categoryItem)
session.commit()
return redirect(url_for('showCategory',
catalog_id=categoryItem.category_id
)
)
else:
return render_template('deleteCategoryItem.html',
categoryItem=categoryItem
)
# Call the login page
@app.route('/login')
def login():
# Create anti-forgery state token
state = ''.join(random.choice(
string.ascii_uppercase + string.digits
) for x in xrange(32)
)
login_session['state'] = state
return render_template('login.html', STATE=state)
# Call the logout function and clear the session
@app.route('/logout')
def logout():
if 'provider' in login_session:
fbdisconnect()
del login_session['facebook_id']
del login_session['username']
del login_session['email']
del login_session['picture']
del login_session['user_id']
del login_session['provider']
print "login session infos deleted"
return redirect(url_for('showCategories'))
else:
print "you are not logged in"
return redirect(url_for('showCategories'))
# Log in using Facebook account by Facebook's API
@app.route('/fbconnect', methods=['POST'])
def fbconnect():
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
access_token = request.data
app_id = json.loads(open('fb_client_secrets.json',
'r').read())['web']['app_id']
app_secret = json.loads(open('fb_client_secrets.json',
'r').read())['web']['app_secret']
url = 'https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&client_id=%s&client_secret=%s&fb_exchange_token=%s' % (app_id, app_secret, access_token) # noqa
h = httplib2.Http()
result = h.request(url, 'GET')[1]
print "access token retornado %s " % result
# Use token to get user info from API
userinfo_url = "https://graph.facebook.com/v2.8/me"
token = result.split(',')[0].split(':')[1].replace('"', '')
url = 'https://graph.facebook.com/v2.8/me?access_token=%s&fields=name,id,email' % token # noqa
h = httplib2.Http()
result = h.request(url, 'GET')[1]
data = json.loads(result)
print "novo token %s " % data
login_session['provider'] = 'facebook'
login_session['username'] = data["name"]
login_session['email'] = data["email"]
login_session['facebook_id'] = data["id"]
# The token must be stored in the login_session in order to properly logout
login_session['access_token'] = token
# Get user picture
url = 'https://graph.facebook.com/v2.8/me/picture?access_token=%s&redirect=0&height=200&width=200' % token # noqa
h = httplib2.Http()
result = h.request(url, 'GET')[1]
data = json.loads(result)
login_session['picture'] = data["data"]["url"]
# see if user exists
user_id = getUserID(login_session['email'])
if not user_id:
user_id = createUser(login_session)
login_session['user_id'] = user_id
output = ''
output += '<h1>Welcome, '
output += login_session['username']
output += '!</h1>'
flash("Now logged in as %s" % login_session['username'])
return output
# Disconnect from Facebook account
@app.route('/fbdisconnect')
def fbdisconnect():
facebook_id = login_session['facebook_id']
access_token = login_session['access_token']
# The access token must be included to successfully logout
url = 'https://graph.facebook.com/%s/permissions?access_token=%s' % (facebook_id, access_token) # noqa
h = httplib2.Http()
result = h.request(url, 'DELETE')[1]
print "you have been logged out"
print result
# ENDPOINT API JSON - returns a specific item
@app.route('/catalog/item/<int:item_id>/JSON')
def showItemJSON(item_id):
item = session.query(CategoryItem).filter_by(id=item_id)
return jsonify(Item=[i.serialize for i in item])
if __name__ == '__main__':
app.debug = True
app.secret_key = 'super_secret_key'
app.run(host='0.0.0.0', port=5000)