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app.py
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app.py
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import os
import sys
import folium
import geopy
from cs50 import SQL
from flask import Flask, flash, redirect, render_template, request, session
from werkzeug.security import check_password_hash, generate_password_hash
from flask_session import Session
from helpers import geocode, reversegeocode, login_required, apology, popup_html
# Configure application
app = Flask(__name__)
app.config['TEMPLATES_AUTO_RELOAD'] = True
# Configure session to use filesystem (instead of signed cookies)
app.config["SESSION_PERMANENT"] = False
app.config["SESSION_TYPE"] = "filesystem"
Session(app)
# Configure CS50 Library to use SQLite database
db = SQL("sqlite:///groundup.db")
@app.after_request
def after_request(response):
"""Ensure responses aren't cached"""
response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
response.headers["Expires"] = 0
response.headers["Pragma"] = "no-cache"
return response
@app.route("/login", methods=["GET", "POST"])
def login():
"""Log user in"""
# Forget any user_id
session.clear()
# User reached route via POST (as by submitting a form via POST)
if request.method == "POST":
# Ensure username was submitted
if not request.form.get("username"):
return apology("must provide username", 403)
# Ensure password was submitted
elif not request.form.get("password"):
return apology("must provide password", 403)
# Query database for username
rows = db.execute("SELECT * FROM users WHERE username = ?", request.form.get("username"))
# Ensure username exists and password is correct
if len(rows) != 1 or not check_password_hash(rows[0]["hash"], request.form.get("password")):
return apology("invalid username and/or password", 403)
# Remember which user has logged in
session["user_id"] = rows[0]["id"]
# Remember what type of user is logged in (collector or client)
session["type"] = rows[0]["type"]
# Create a new empty data collector linked to the user (if the user is a data collector and this is the first time logging in)
if session["type"] == 'collector':
if not db.execute("SELECT 1 FROM datacollectors WHERE userid = ?;", session["user_id"]):
db.execute("INSERT INTO datacollectors (userid) VALUES (?);", session["user_id"])
# Redirect user to home page
return redirect("/dashboard")
# User reached route via GET (as by clicking a link or via redirect)
else:
return render_template("login.html")
@app.route("/logout")
def logout():
"""Log user out"""
# Forget any user_id
session.clear()
# Redirect user to login form
return redirect("/")
@app.route("/forgot", methods=["GET", "POST"])
def forgot():
"""Reset forgotten password"""
# User reached route via POST (as by submitting a form via POST)
if request.method == "POST":
# Get username and new password from user
username = request.form.get("username")
new_password = request.form.get("password")
# Ensure username exists
rows = db.execute("SELECT * FROM users WHERE username = ?", username)
if len(rows) != 1:
return apology("invalid username", 403)
# Update password hash in the database
db.execute("UPDATE users SET hash = ? WHERE username = ?", generate_password_hash(new_password), username)
return redirect("/")
# User reached route via GET (as by clicking a link or via redirect)
else:
return render_template("login.html")
@app.route("/register", methods=["GET", "POST"])
def register():
"""Register a new data collector or client"""
if request.method == "POST":
# Get username and password from user
username = request.form.get("username")
password = request.form.get("password")
confirmation = request.form.get("confirmation")
# Validate username
if username == '' or len(db.execute("SELECT * FROM users WHERE username = ?", username)) != 0:
return apology("enter a valid username", 400)
# Validate password
if password == '' or confirmation == '' or password != confirmation:
return apology("enter a valid password", 400)
# Find user type based on which form was submitted
if request.form['submit'] == 'collector':
type = 'collector';
else:
type = 'client'
# Create a new user in users database
db.execute("INSERT INTO users (username, hash, type) VALUES(?, ?, ?);", username, generate_password_hash(password), type)
return redirect("/")
else:
return render_template("register.html")
@app.route("/")
def index():
return render_template("index.html")
@app.route("/dashboard", methods=["GET", "POST"])
@login_required
def dashboards():
"""Render main dashboard pages: data collector dashboard and client dashboard"""
# If logged in as a client
if session.get("type") == 'client':
if request.method == "POST":
# Get form inputs from user
distance = request.form.get("distance")
address = request.form.get("address")
occupation = str(request.form.get("occupation"))
degree = str(request.form.get("degree"))
sector = str(request.form.get("sector"))
# Handle exceptions with address and distance
if distance == "" or address == "":
pass
elif geocode(address) == 1:
return apology("unrecognized location", 403)
else:
# Geocode address to lat and lng
lat, lng = geocode(address)
# Find range of lat and lng based on the distance
radius = geopy.units.degrees(arcminutes=geopy.units.nautical(miles=int(distance)))
latmin = lat - radius
latmax = lat + radius
lngmin = lng - radius
lngmax = lng + radius
# Append to datacollectors filtered based on the inputs from the user, handling blank inputs
# If an input is blank, any value for that condition should be seached for and displayed
select = "INSERT INTO datacollectorsfiltered SELECT id, firstname, lastname, lat, lng, occupation, degree, sector FROM datacollectors"
first = 0
def fillerchars(first, select):
if first == 0:
select += " WHERE"
if first == 1:
select += " AND"
first = 1
return first, select
# Dynamically create SQL query text
if occupation != "None":
first, select = fillerchars(first, select)
select += " occupation = ?"
else:
first, select = fillerchars(first, select)
select += " occupation IS NOT NULL"
if degree != "None":
first, select = fillerchars(first, select)
select += " degree = ?"
else:
first, select = fillerchars(first, select)
select += " degree IS NOT NULL"
if sector != "None":
first, select = fillerchars(first, select)
select += " sector = ?"
else:
first, select = fillerchars(first, select)
select += " sector IS NOT NULL"
if distance == "" or address == "":
first, select = fillerchars(first, select)
select += " lat IS NOT NULL AND lng IS NOT NULL"
else:
first, select = fillerchars(first, select)
select += " (lat BETWEEN ? AND ?) AND (lng BETWEEN ? AND ?)"
# Dynamically generate arguments for the sql query
arguments = []
if occupation != "None":
arguments.append(occupation)
if degree != "None":
arguments.append(degree)
if sector != "None":
arguments.append(sector)
if not(distance == "" or address == ""):
arguments.append(latmin)
arguments.append(latmax)
arguments.append(lngmin)
arguments.append(lngmax)
arguments = tuple(arguments)
# Execute SQL query to add contents selected by filters to filtered data collectors table
db.execute(select, *arguments)
return redirect("/map")
else:
# Render the filtering form, adding values from database
occupation = db.execute("SELECT DISTINCT occupation FROM datacollectors WHERE occupation IS NOT NULL;")
degree = db.execute("SELECT DISTINCT degree FROM datacollectors WHERE degree IS NOT NULL;")
sector = db.execute("SELECT DISTINCT sector FROM datacollectors WHERE sector IS NOT NULL;")
return render_template("client.html", occupation=occupation, degree=degree, sector=sector)
# If logged in as a datacollector
elif session.get("type") == 'collector':
userid = session["user_id"]
if request.method == "POST":
# Update collector database based on which value is updated/which button is pressed
if request.form['updatebtn'] == 'name':
firstname = str(request.form.get("firstname"))
lastname = str(request.form.get("lastname"))
db.execute("UPDATE datacollectors SET firstname = ?, lastname = ? WHERE userid = ?;", firstname, lastname, userid)
elif request.form['updatebtn'] == 'location':
lat = request.form.get("latitude")
lng = request.form.get("longitude")
# Check that lat and lng are valid
if reversegeocode(lat, lng) == 1:
return apology("enter a valid lat and lng", 403)
db.execute("UPDATE datacollectors SET lat = ?, lng = ? WHERE userid = ?;", lat, lng, userid)
elif request.form['updatebtn'] == 'occupation':
occupation = str(request.form.get("occupation"))
db.execute("UPDATE datacollectors SET occupation = ? WHERE userid = ?;", occupation, userid)
elif request.form['updatebtn'] == 'degree':
degree = str(request.form.get("degree"))
db.execute("UPDATE datacollectors SET degree = ? WHERE userid = ?;", degree, userid)
elif request.form['updatebtn'] == 'sector':
sector = str(request.form.get("sector"))
db.execute("UPDATE datacollectors SET sector = ? WHERE userid = ?;", sector, userid)
return redirect("/dashboard")
else:
# Render the data collector dashboard and editing form, drawing values from the database
profile = db.execute("SELECT * FROM datacollectors WHERE userid = ?;", userid)
address = reversegeocode(profile[0]["lat"], profile[0]["lng"])
username = db.execute("SELECT username FROM users WHERE id = ?", userid)[0]["username"]
return render_template("collector.html", profile=profile, address=address, username=username)
@app.route("/map")
@login_required
def map_endpoint():
"""Generate mapdata.html and render map based on user parameters"""
# Retrieve the appropriate data collectors based on our filters. This outputs in the form of a list of dictionaries.
collector_info = db.execute("SELECT * FROM datacollectorsfiltered WHERE lat IS NOT NULL AND lng is NOT NULL;")
# Find center lat and lng of the points we are graphing
count = 0
latsum = 0
lngsum = 0
for row in collector_info:
latsum += row["lat"]
lngsum += row["lng"]
count += 1
# Handle if there are no data collectors
if count == 0:
avglat = 22.991144554354932
avglng = 79.70703619196892
else:
avglat = latsum / count
avglng = lngsum / count
# Initialize folium map centering on dynamic location (above)
myMap = folium.Map(location=[avglat, avglng],
width='100%',
height='100%',
zoom_start=6,
position='relative')
# Add markers to the map using the folium.Marker functionality, iterating over our collector info from datacollectorsfiltered
for item in collector_info:
x = item["lat"]
y = item["lng"]
# Uses the popup_html helper function to create the "profiles" when you click on the marker
html = popup_html(item)
popup = folium.Popup(folium.Html(html, script=True), max_width=500)
# Creates the markers at the desired location with the correct popups
folium.Marker([x, y], popup=popup).add_to(myMap)
# Saves the changes on the html page.
myMap.save("templates/mapdata.html")
# Delete all elements from filtered data collectors table so map can be generated again in the future
db.execute("DELETE FROM datacollectorsfiltered;")
return render_template("map.html")