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app.py
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app.py
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# coding=utf-8
from flask import Flask, request, redirect, session
from twilio.twiml.messaging_response import MessagingResponse
import requests
import os
import psycopg2
import urlparse
import googlemaps
import math
import json
import datetime
SECRET_KEY = #PUT YOUR KEY HERE
app = Flask(__name__)
app.config.from_object(__name__)
'''
# CONNECTING TO POSTGRES
conn_string = "host='localhost' dbname='bench-buddy' user='brianho' password=''"
print "Connecting to database\n -> %s" % (conn_string)
# get a connection, if a connect cannot be made an exception will be raised here
conn = psycopg2.connect(conn_string)
'''
urlparse.uses_netloc.append("postgres")
url = urlparse.urlparse(os.environ["HEROKU_POSTGRESQL_YELLOW_URL"])
conn = psycopg2.connect(
database=url.path[1:],
user=url.username,
password=url.password,
host=url.hostname,
port=url.port
)
# conn.cursor will return a cursor object, you can use this cursor to perform queries
cursor = conn.cursor()
print "Connected!\n"
# SETUP GOOGLE MAPS API CLIENT
gmaps = googlemaps.Client(key=os.environ["GOOGLE_MAPS_KEY"])
zipcodes = ['02108', '02109', '02110', '02111', '02113', '02114', '02115', '02116', '02118', '02119', '02120',
'02121', '02122', '02124', '02125', '02126', '02127', '02128', '02129', '02130', '02131', '02132',
'02134', '02135', '02136', '02151', '02152', '02163', '02199', '02203', '02210', '02215', '02467']
neighborhoods = ['Boston','Allston','Back Bay','Bay Village','Beacon Hill','Brighton','Charlestown','Chinatown',
'Leather District','Dorchester','East Boston','Fenway Kenmore','Hyde Park','Jamaica Plain','Mattapan',
'Mission Hill','North End','Roslindale','Roxbury','South Boston','South End','West End','West Roxbury']
days = ['monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday']
# ROUTE FOR ALL INCOMING SMS
@app.route('/', methods=['GET', 'POST'])
def test_reponse():
# Track the conversation
greeted = session.get("greeted", False)
restroom_mode = session.get("restroom_mode", False)
located = session.get("located", False)
found = session.get("found", False)
bench_id = session.get("bench", -1)
named = session.get("named", False)
lat = session.get("lat", -9999)
lon = session.get("lon", -9999)
# Switch the thing (object noun)
thing = "bathroom" if restroom_mode else "bench"
things = "bathrooms" if restroom_mode else "benches"
# Get user text contents
body = request.values.get('Body').encode('utf-8')
print 'User message: "%s" (greeted: %r, restroom: %r, located: %r, found: %r, bench_id: %r, named: %r, lat: %s, lon: %s)' % (body,greeted, restroom_mode, located, found, bench_id, named, lat, lon)
# If first time user, send greeting and instructions
if not greeted:
m = "Hi! I'm the Boston Bench Buddy. I'll find you a place to sit. Where are you?\n\n"
m += "Or text 'bathroom' to find a place to go."
session["greeted"] = True
print "Greeting user ..."
# Trigger for bathroom mode / restart
elif (body.lower()=="restart" and restroom_mode) or body.lower()=="restroom" or body.lower()=="toilet" or body.lower()=="bathroom":
m = "Okay! I'm also the Boston Bathroom Buddy. I'll find you a place to go. Where are you?\n\n"
m += "Or text 'bench' to find a place to sit."
session["restroom_mode"] = True
session["located"] = False
session["named"] = False
session["found"] = False
session["bench"] = -1
session["lat"] = -9999
session["lon"] = -9999
print "Starting over in restroom mode ..."
# Trigger for bench mode / restart
elif (body.lower()=="restart" and not restroom_mode) or body.lower() == "n" or body.lower() == "bench":
m = "Okay! I'm the Boston Bench Buddy. I'll find you a place to sit. Where are you?\n\n"
m += "Or text 'bathroom' to find a place to go."
session["restroom_mode"] = False
session["located"] = False
session["named"] = False
session["found"] = False
session["bench"] = -1
session["lat"] = -9999
session["lon"] = -9999
print "Starting over in bench mode ..."
# If greeted, check user response
elif not located:
# Get contents of user text, adding 'Boston' for good measure
if all(neighborhood not in body.lower() for neighborhood in neighborhoods) and any(c.isalpha() for c in body.lower()):
body = "%s Boston" % (body)
# Check to see if user response is a place on Google Maps
print "Finding user ..."
r = gmaps.places(body)
# Can't find response as a location
if r['status'] == 'ZERO_RESULTS':
m = "Hmmm ... I couldn't find your location. Where are you?"
print "Could not find user location..."
# Found user location!
elif r['status'] == 'OK':
# Parse first Google Maps result
user = r['results'][0]['geometry']['location']
lon, lat = user['lng'], user['lat']
map_url = short_url ("https://www.google.com/maps/search/?api=1&query=%f,%f" % (lat,lon))
session['lon'], session['lat'] = lon, lat
print "Found user at %s -- %s" % (r['results'][0]['formatted_address'], map_url)
# If location is outside of Boston
if all(zipcode not in r['results'][0]['formatted_address'].lower() for zipcode in zipcodes) and all(neighborhood.lower() not in r['results'][0]['formatted_address'].lower() for neighborhood in neighborhoods):
m = "Sorry, I can only search for %s within the city of Boston! Try another place?" % things
# If location is in Boston
else:
session["located"] = True
# Make query to database within radius, where 0.001 degree is about 360 feet
if not restroom_mode:
query = "SELECT id, street, park, lon, lat, name FROM benches WHERE ST_DWithin(st_setsrid(st_makepoint(%(lon_)s,%(lat_)s),4326), geom, .002) ORDER BY geom <-> st_setsrid(st_makepoint(%(lon_)s,%(lat_)s),4326) LIMIT 5;"
cursor.execute(query, {"lon_":lon, "lat_":lat})
else:
today = days[datetime.datetime.today().weekday()]
query = "SELECT id, address, lon, lat, name, " + today
query += " FROM restrooms WHERE ST_DWithin(st_setsrid(st_makepoint(%(lon_)s,%(lat_)s),4326), geom, .0075) ORDER BY geom <-> st_setsrid(st_makepoint(%(lon_)s,%(lat_)s),4326);"
cursor.execute(query, {"lon_":lon, "lat_":lat})
print "Querying database for nearby %s ..." % things
# If there are no things nearby
if cursor.rowcount == 0:
m = "Hmm ... I couldn't find any %s near you." % things
m+= "\n\nWant a %s here? Text 'Y', or 'restart' to try another place!" % thing
print "Could not find any %s ..." % things
# If there are things!
else:
session["found"] = True
print "Found some %s ..." % things
# Retrieve data from database query results
results = []
if not restroom_mode:
for id_, street_, park_, lon_, lat_, name_ in cursor:
results.append({"id": id_,"street": street_, "park": park_, "lon":lon_, "lat":lat_, "name":name_})
elif restroom_mode:
for id_, address_, lon_, lat_, name_, hours_ in cursor:
results.append({"id": id_,"address": address_, "lon":lon_, "lat":lat_, "name":name_, "hours":hours_})
# Get Google Maps walking distance matrix for query results
print "Asking Google for distances ..."
r = gmaps.distance_matrix(origins="%f,%f" % (lat,lon), destinations=[(result["lat"],result["lon"]) for result in results], mode="walking", units="imperial")
# Find the nearest thing by walking, using Google
best = 0
for i, result in enumerate(results):
result["distance"] = int(r['rows'][0]['elements'][i]['distance']['value']*3.28084)
result["duration"] = r['rows'][0]['elements'][i]['duration']['text']
# Sort results by walking distance
results = sorted(results, key=lambda k: k['distance'])
best_result = results[best]
# Make sure first result is open, or see if nothing is open
closed = False;
start = ""
end = ""
if restroom_mode:
# Get current time
time = datetime.datetime.now().time()
print "Checking if open ..."
# Loop over results in order until either one is open or all exhausted
while True:
best_result = results[best]
# If closed all day
if best_result["hours"] == "closed":
closed = True;
best += 1
# Check against saved start and end times
else:
start = datetime.datetime.strptime(best_result["hours"][:5],'%H:%M').time()
end = datetime.datetime.strptime(best_result["hours"][-5:],'%H:%M').time()
# If closed
if start > time and time > end:
closed = True;
best += 1
# If open
elif start < time and time < end:
closed = False
break
# If at the end of results
if best == len(results):
break
# Message if result is open
if not closed:
# Construct message intro
m = "Closest %s is" % thing
if best_result["name"]:
m += " %s" % best_result["name"]
session["named"] = True
# MESSAGE ADDITIONS FOR BENCHES
if not restroom_mode:
# Add descriptions of landmarks and identifiers, if applicable
# Streets
if best_result["street"] != -1:
query = "SELECT name, type FROM streets WHERE id = %i" % (best_result["street"])
cursor.execute(query)
street = cursor.fetchone()
best_result["street_name"] = street[0]
best_result["street_type"] = street[1]
m += " along %s" % (best_result["street_name"].title())
if best_result["street_type"] != "":
m += " %s" % (best_result["street_type"].title())
# Parks
if best_result["park"] != 0:
query = "SELECT name FROM parks WHERE id = %i" % (best_result["park"])
cursor.execute(query)
park = cursor.fetchone()
best_result["park_name"] = park[0]
m += " in %s" % (best_result["park_name"])
# MESSAGE ADDITIONS FOR BATHROOMS
elif restroom_mode:
m += " at %s, open" % (best_result["address"])
if start == datetime.time(0, 0, 0) and end == datetime.time(23, 59, 00):
m += " 24 hours"
else:
m += " until %s" % (end.strftime("%-I:%M %p"))
# Message conclusion
m += " ... about %i ft and %s away to the %s!" % (best_result["distance"], best_result["duration"], ordinal(lon, best_result["lon"], lat, best_result["lat"]))
if not best_result["name"]:
m += "\n\nWant to name this bench? Text a name, or text 'restart' or 'N' to start over."
else:
m += "\n\nText 'restart' to find another!"
# Add map to message
map_url = short_url("\nhttps://www.google.com/maps/dir/?api=1&origin=%s,%s&destination=%s,%s&travelmode=walking" % (lat, lon, best_result["lat"], best_result["lon"]))
m += "\n%s" % (map_url)
if not restroom_mode:
session["bench"] = best_result["id"]
print "Found nearest %s -- %s" % (thing, map_url)
# Message if all results are closed
elif closed:
m = "Sorry, all nearby %s are closed." % thing
m+= "\n\nWant a %s open here? Text 'Y', or 'restart' to try another place!" % thing
print "Could not find any open %s ..." % things
# Making a request
elif greeted and located and not found and not named and 'y' == body.lower():
query = "INSERT INTO desired (lat, lon, datetime, type) VALUES (%(lat_)s, %(lon_)s, %(time_)s, %(type_)s);"
cursor.execute(query, {'lat_': session['lat'], 'lon_': session['lon'], 'time_': datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S %Z'), 'type_': thing})
conn.commit()
m = "Okay! I've saved that location for a %s. Text 'restart' to try and find another %s." % (thing, thing)
session["found"] = True
session["named"] = True
print "Saving sugested location for a %s at %s, %s" % (thing, session['lat'], session['lon'])
# If there are further messages after finding
elif greeted and located and found and named and "restart" != body.lower():
if "thanks" in body.lower() or "thank you" in body.lower():
m = "You're welcome! Text 'restart' to find another %s!" % thing
else:
m = "I've already found you a %s. Text 'restart' to find another!" % thing
print "Asking if they want to start over ..."
# If submitting a name
elif greeted and located and found and not named and "restart" != body.lower():
# Check name for no unicode
try:
body.decode('ascii')
except UnicodeDecodeError:
m = "Simple names only, please! Try another name?"
print "Name not ASCII. Asking for another ..."
else:
# Check for length
if len(body) > 32:
m = "That name is too long. Try another name?"
print "Name was too long. Asking for another ..."
# Check for odd characters
elif not all(c.isalnum() or c.isspace() for c in body.lower()):
m = "Letters and spaces only, please. Try another name?"
print "Name not alphanum or spaces. Asking for another ..."
# Update name in database
else:
query = "UPDATE benches SET name = %(name)s WHERE id = %(id)s;"
cursor.execute(query, ({"name":body.upper(), "id":session["bench"]}))
conn.commit()
m = "Okay, that bench will be called %s!\nText 'restart' to find another! " % (body.upper())
session["named"] = True
print "Named bench %s" % (body.upper())
resp = MessagingResponse()
resp.message(m)
return str(resp)
# HELPER FUNCTIONS
# Gets cardinal direction
def ordinal(x1, x2, y1, y2):
dirs = ["north", "northeast", "east", "southeast", "south", "southwest", "west", "northwest"]
bearing = (90-math.degrees(math.atan2((y2-y1),(x2-x1))))%360
ix = int(math.floor(((bearing + 22.5)%360)/45))
return dirs[ix]
# Gets a short url
def short_url(url):
post_url = 'https://www.googleapis.com/urlshortener/v1/url?key=%s' % (os.environ['GOOGLE_SHORTENER_KEY'])
params = json.dumps({'longUrl': url})
r = requests.post(post_url,params,headers={'Content-Type': 'application/json'})
return r.json()['id']
if __name__ == '__main__':
app.run(debug=True)