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app.py
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app.py
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import os
import boto3
from flask import (
Flask, flash, render_template,
redirect, request, session, url_for)
from flask_pymongo import PyMongo
from flask_paginate import Pagination, get_page_args
from bson.objectid import ObjectId
from werkzeug.security import generate_password_hash, check_password_hash
from werkzeug.utils import secure_filename
from datetime import date
from io import BytesIO
from PIL import Image, ImageOps
if os.path.exists("env.py"):
import env # noqa: F401
# Pagination activity limit
PER_PAGE = 9
# Target age choices
AGES = ["Under 2", "2-4", "4-6", "6+"]
# Image upload restrictions
ALLOWED_EXTENSIONS = {"png", "jpg", "jpeg", "gif"}
# Amazon S3 Bucket
S3_BUCKET = os.environ.get("S3_BUCKET")
S3_KEY = os.environ.get("S3_KEY")
S3_SECRET = os.environ.get("S3_SECRET_ACCESS_KEY")
S3_LOCATION = os.environ.get("S3_LOCATION")
s3 = boto3.client(
"s3",
aws_access_key_id=S3_KEY,
aws_secret_access_key=S3_SECRET
)
# Flask app setup
app = Flask(__name__)
app.config["MONGO_DBNAME"] = os.environ.get("MONGO_DBNAME")
app.config["MONGO_URI"] = os.environ.get("MONGO_URI")
app.secret_key = os.environ.get("SECRET_KEY")
app.config['MAX_CONTENT_LENGTH'] = 8 * 1024 * 1024
mongo = PyMongo(app)
# FUNCTIONS
# Pagination
# https://gist.github.com/mozillazg/69fb40067ae6d80386e10e105e6803c9
def paginated(activities):
page, per_page, offset = get_page_args(
page_parameter='page', per_page_parameter='per_page')
offset = page * PER_PAGE - PER_PAGE
return activities[offset: offset + PER_PAGE]
def pagination_args(activities):
page, per_page, offset = get_page_args(
page_parameter='page', per_page_parameter='per_page')
total = len(activities)
return Pagination(page=page, per_page=PER_PAGE, total=total)
# Image upload
# https://www.zabana.me/notes/flask-tutorial-upload-files-amazon-s3
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
def upload_file():
# Output will be blank if image_file key not found on submission
output = ""
if "image_file" not in request.files:
return output
# If the key is in the object, save it in file variable
file = request.files["image_file"]
# Check the filename, if it's blank, leave it blank
if file.filename == "":
return output
# Check that there is a file and that it has an allowed filetype
if file and allowed_file(file.filename):
file.filename = secure_filename(file.filename)
output = upload_file_to_s3(file)
return output
def resize_image(file):
# Load the image received through the submitted form
raw_image = Image.open(file)
# Save its format (as not copied on creation of new image)
saved_format = raw_image.format
# Read EXIF data to handle portrait images being rotated
new_image = ImageOps.exif_transpose(raw_image)
# Reapply raw_image format so that it can be resized
new_image.format = saved_format
# Resize image and set max-length in either axis to 500px
new_image.thumbnail((500, 500))
# Save the image to an in-memory file
in_mem_file = BytesIO()
new_image.save(in_mem_file, format=new_image.format)
# 'Rewind' the file-like object to prevent 0kb-sized files
in_mem_file.seek(0)
return in_mem_file
def upload_file_to_s3(file):
try:
image_for_upload = resize_image(file)
# Upload image to s3
s3.upload_fileobj(
image_for_upload,
S3_BUCKET,
file.filename,
ExtraArgs={
'ACL': 'public-read'
}
)
except Exception as e:
print("Something Happened: ", e)
return e
return "{}{}".format(S3_LOCATION, file.filename)
# ROUTING
@app.route("/")
@app.route("/home")
def home():
activities = list(mongo.db.activities.find().sort("_id", -1))
categories = list(mongo.db.categories.find())
return render_template("home.html",
activities=activities,
categories=categories)
@app.route("/activities")
def get_activities():
activities = list(mongo.db.activities.find().sort("_id", -1))
categories = list(mongo.db.categories.find())
activities_paginated = paginated(activities)
pagination = pagination_args(activities)
return render_template('activities.html',
activities=activities_paginated,
categories=categories,
page_heading="All Activities",
pagination=pagination,
)
@app.route("/search")
def search():
query = request.args.get("query")
categories = list(mongo.db.categories.find())
activities = list(mongo.db.activities.find(
{"$text": {"$search": query}}).sort("_id", -1))
activities_paginated = paginated(activities)
pagination = pagination_args(activities)
return render_template("activities.html",
categories=categories,
activities=activities_paginated,
pagination=pagination,
page_heading="Results for '{}'".format(query))
@app.route("/filter/category/<category_id>")
def filter_category(category_id):
categories = list(mongo.db.categories.find())
category = mongo.db.categories.find_one({"_id": ObjectId(category_id)})
activities = list(mongo.db.activities.find(
{"category_name": category["category_name"]}).sort("_id", -1))
activities_paginated = paginated(activities)
pagination = pagination_args(activities)
return render_template("activities.html",
category=category,
activities=activities_paginated,
categories=categories,
pagination=pagination,
page_heading=category['category_name'])
@app.route("/filter/age/<target_age>")
def filter_age(target_age):
categories = list(mongo.db.categories.find())
activities = list(mongo.db.activities.find(
{"target_age": target_age}).sort("_id", -1))
activities_paginated = paginated(activities)
pagination = pagination_args(activities)
return render_template("activities.html",
activities=activities_paginated,
categories=categories,
pagination=pagination,
page_heading=target_age)
@app.route("/filter/user/<username>")
def filter_user(username):
categories = list(mongo.db.categories.find())
activities = list(mongo.db.activities.find(
{"created_by": username}).sort("_id", -1))
activities_paginated = paginated(activities)
pagination = pagination_args(activities)
return render_template("activities.html",
activities=activities_paginated,
categories=categories,
pagination=pagination,
page_heading="Activities from {}".format(username))
@app.route("/register", methods=["GET", "POST"])
def register():
# If nothing submitted
if request.method != "POST":
return render_template("register.html")
else:
# Check if username already exists in database
existing_user = mongo.db.users.find_one(
{"username": request.form.get("username").lower()})
if existing_user:
flash("Username '{}' aleady exists".format(
request.form.get("username")))
return redirect(url_for("register"))
# Get the submitted form inputs
register = {
"username": request.form.get("username").lower(),
"password": generate_password_hash(request.form.get("password"))
}
mongo.db.users.insert_one(register)
# Put the new user into 'session' cookie
session["user"] = request.form.get("username").lower()
flash("Registration Successful!")
return redirect(url_for("profile", username=session["user"]))
@app.route("/login", methods=["GET", "POST"])
def login():
if "user" in session:
return redirect(url_for(
"profile", username=session["user"]))
elif request.method != "POST":
return render_template("login.html")
else:
# Check if username exists in database
existing_user = mongo.db.users.find_one(
{"username": request.form.get("username").lower()})
if not existing_user:
flash("Incorrect Username and/or Password")
return redirect(url_for("login"))
# Ensure hashed password matches user input
elif check_password_hash(
existing_user["password"], request.form.get("password")):
session["user"] = request.form.get("username").lower()
flash("Logged in as {}".format(request.form.get("username")))
return redirect(url_for(
"profile", username=session["user"]))
else:
flash("Incorrect Username and/or Password")
return redirect(url_for("login"))
@app.route("/profile/<username>", methods=["GET", "POST"])
def profile(username):
username = mongo.db.users.find_one(
{"username": session["user"]})["username"]
activities = list(mongo.db.activities.find(
{"created_by": session["user"]}).sort("_id", -1))
categories = list(mongo.db.categories.find())
if session["user"]:
return render_template(
"profile.html",
username=username,
activities=activities,
categories=categories)
return redirect(url_for("login"))
@app.route("/logout")
def logout():
# If user is not logged in
if "user" not in session:
flash("You are already logged out!")
return redirect(url_for("home"))
else:
# Remove user from session cookies
flash("You have been logged out")
session.pop("user")
return redirect(url_for("login"))
@app.route("/add_activity", methods=["GET", "POST"])
def add_activity():
categories = list(mongo.db.categories.find().sort("category_name", 1))
if "user" not in session:
flash("You need to Log In to do that!")
return redirect(url_for("login"))
elif request.method != "POST":
return render_template(
"add_activity.html",
categories=categories,
ages=AGES)
else:
# Get new activity details, check for file upload
submit = {
"activity_name": request.form.get("activity_name"),
"category_name": request.form.get("category_name"),
"target_age": request.form.get("target_age"),
"activity_summary": request.form.get("activity_summary"),
"activity_details": request.form.get("activity_details"),
"activity_equipment": request.form.get("activity_equipment"),
"image_file": upload_file(),
"created_by": session["user"],
"date_added": date.today().strftime("%d %b %Y")
}
# Create a list of existing activity names in lowercase
existing_activities = list(mongo.db.activities.find())
lowercase_name = submit["activity_name"].lower()
lowercase_list = []
for x in existing_activities:
lowercase_list.append(x["activity_name"].lower())
# Check whether activity name already in database
if lowercase_name in lowercase_list:
flash("'{}' already exists, please choose another name".format(
submit["activity_name"]))
return redirect(url_for("add_activity"))
else:
# Add new activity to the database
new_activity = mongo.db.activities.insert_one(submit).inserted_id
# Store new activity id in category's activity_list
mongo.db.categories.update_one(
{"category_name": submit["category_name"]},
{"$push": {"activity_list": ObjectId(new_activity)}})
flash("Activity added: {}".format(submit["activity_name"]))
return redirect(url_for("get_activities"))
@app.route("/edit_activity/<activity_id>", methods=["GET", "POST"])
def edit_activity(activity_id):
activity = mongo.db.activities.find_one({"_id": ObjectId(activity_id)})
activity_owner = activity["created_by"]
categories = list(mongo.db.categories.find().sort("category_name", 1))
if "user" not in session:
flash("You need to Log In to do that!")
return redirect(url_for("login"))
# If not activity owner or admin
elif session["user"] != activity_owner and session["user"] != "admin":
flash("This Activity belongs to someone else!")
return redirect(url_for('view_activity',
activity_id=ObjectId(activity_id)))
elif request.method != "POST":
return render_template(
"edit_activity.html",
activity=activity,
categories=categories,
ages=AGES)
else:
# If no new image chosen, keep existing image
if request.files["image_file"].filename == "":
edit_image_path = activity["image_file"]
# Otherwise prepare for uploading new image
else:
edit_image_path = upload_file()
# Get edit details
edit = {"$set": {
"activity_name": request.form.get("activity_name"),
"category_name": request.form.get("category_name"),
"target_age": request.form.get("target_age"),
"activity_summary": request.form.get("activity_summary"),
"activity_details": request.form.get("activity_details"),
"activity_equipment": request.form.get("activity_equipment"),
"image_file": edit_image_path,
}}
# Create a list of existing activity names in lowercase
existing_activities = list(mongo.db.activities.find())
lowercase_name = request.form.get("activity_name").lower()
lowercase_list = []
for x in existing_activities:
lowercase_list.append(x["activity_name"].lower())
# Check if new name input and already exists in database
if lowercase_name != activity["activity_name"].lower() and \
lowercase_name in lowercase_list:
flash("'{}' already exists, please choose another name".format(
request.form.get("activity_name")))
return redirect(url_for('edit_activity',
activity_id=ObjectId(activity_id)))
else:
# Save activity edit details to database
mongo.db.activities.update_many(activity, edit)
# Find old category and category selected on form
current_category = mongo.db.categories.find_one(
{"category_name": activity["category_name"]})
new_category = mongo.db.categories.find_one(
{"category_name": request.form.get("category_name")})
# If chosen category name is different from existing category name
if request.form.get(
"category_name") != current_category["category_name"]:
# Move activity id from old activity_list to new one
mongo.db.categories.update_one(
new_category,
{"$push": {"activity_list": activity["_id"]}})
mongo.db.categories.update_one(
current_category,
{"$pull": {"activity_list": activity["_id"]}})
flash("Activity updated ({})".format(activity["activity_name"]))
return redirect(url_for('view_activity',
activity_id=ObjectId(activity_id)))
@app.route("/delete_activity/<activity_id>")
def delete_activity(activity_id):
activity = mongo.db.activities.find_one({"_id": ObjectId(activity_id)})
activity_owner = activity["created_by"]
if "user" not in session:
flash("You need to Log In to do that!")
return redirect(url_for("login"))
# If not activity owner or admin
elif session["user"] != activity_owner and session["user"] != "admin":
flash("This Activity belongs to someone else!")
return redirect(url_for('view_activity',
activity_id=ObjectId(activity_id)))
# Otherwise remove activity id from category's activity list
else:
mongo.db.categories.find_one_and_update(
{"category_name": activity["category_name"]},
{"$pull": {"activity_list": activity["_id"]}})
# And remove activity from the database
mongo.db.activities.remove({"_id": ObjectId(activity_id)})
flash("Activity deleted ({})".format(activity["activity_name"]))
return redirect(url_for('profile', username=session['user']))
@app.route("/view_activity/<activity_id>")
def view_activity(activity_id):
activity = mongo.db.activities.find_one({"_id": ObjectId(activity_id)})
user = mongo.db.users.find_one({"username": activity["created_by"]})
categories = list(mongo.db.categories.find())
return render_template("view_activity.html", activity=activity,
categories=categories, user=user)
@app.route("/categories")
def get_categories():
activities = list(mongo.db.activities.find())
categories = list(mongo.db.categories.find().sort("category_name", 1))
return render_template("categories.html",
categories=categories, activities=activities)
@app.route("/add_category", methods=["GET", "POST"])
def add_category():
if "user" not in session:
flash("You need to Log In to do that!")
return redirect(url_for("login"))
# If not the admin
elif session["user"].lower() != "admin":
flash("That's an Admin's job!")
return redirect(url_for("get_categories"))
elif request.method != "POST":
return render_template("add_category.html")
# If admin submits form, get details
else:
category = {
"category_name": request.form.get("category_name"),
"category_summary": request.form.get("category_summary"),
"image_file": upload_file(),
"activity_list": []
}
# Create a list of existing category names
existing_categories = list(mongo.db.categories.find())
lowercase_name = category["category_name"].lower()
lowercase_list = []
for x in existing_categories:
lowercase_list.append(x["category_name"].lower())
# Check whether name already in database
if lowercase_name in lowercase_list:
flash("'{}' already exists, please choose another name".format(
category["category_name"]))
return redirect(url_for('add_category'))
# If not, add new category to database
mongo.db.categories.insert_one(category)
flash("Category added ({})".format(category["category_name"]))
return redirect(url_for("get_categories"))
@app.route("/edit_category/<category_id>", methods=["GET", "POST"])
def edit_category(category_id):
category = mongo.db.categories.find_one({"_id": ObjectId(category_id)})
if "user" not in session:
flash("You need to Log In to do that!")
return redirect(url_for("login"))
# If not the admin
elif session["user"].lower() != "admin":
flash("That's an Admin's job!")
return redirect(url_for("get_categories"))
elif request.method != "POST":
return render_template("edit_category.html", category=category)
# If admin submits form without chosing new image
else:
if request.files["image_file"].filename == "":
edit_image_path = category["image_file"]
# Otherwise prepare to upload file and get edit details
else:
edit_image_path = upload_file()
edit = {"$set": {
"category_summary": request.form.get("category_summary"),
"image_file": edit_image_path,
}}
# Update category in the database
mongo.db.categories.update_many(category, edit)
flash("Category updated ({})".format(category["category_name"]))
return redirect(url_for("get_categories"))
@app.route("/delete_category/<category_id>")
def delete_category(category_id):
category = mongo.db.categories.find_one({"_id": ObjectId(category_id)})
# Check for activities belonging to category
dependent_activities = list(mongo.db.activities.find(
{"category_name": category["category_name"]}))
# Find "Unassigned" category in database
unassigned_category = mongo.db.categories.find_one(
{"category_name": "Unassigned"})
activities = []
if "user" not in session:
flash("You need to Log In to do that!")
return redirect(url_for("login"))
# If not the admin
elif session["user"].lower() != "admin":
flash("That's an Admin's job!")
return redirect(url_for("get_categories"))
# Otherwise populate list of activities belonging to deleted category
else:
for activity in dependent_activities:
mongo.db.activities.find_one_and_update(
activity, {"$set": {"category_name": "Unassigned"}})
activities.append(activity["_id"])
# Add dependent activities to "Unassigned" category's activity_list key
mongo.db.categories.find_one_and_update(
unassigned_category,
{"$addToSet": {"activity_list": {"$each": activities}}})
# And remove category from the database
mongo.db.categories.remove(category)
flash("Category deleted ({})".format(category["category_name"]))
return redirect(url_for('get_categories'))
@app.errorhandler(404)
def not_found(error):
return render_template('404.html', error=error), 404
@app.errorhandler(500)
def internal_error(error):
return render_template('500.html', error=error), 500
if __name__ == "__main__":
app.run(host=os.environ.get("IP"),
port=int(os.environ.get("PORT")),
debug=False)