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backend.py
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backend.py
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from math import radians, cos, sin, asin, sqrt
from flask import Flask, render_template, request,session,redirect
from flask_cors import CORS
from flask import Response
from pymongo import MongoClient
import plotly
import plotly.graph_objs as go
import matplotlib.pyplot as plt
from plotly.offline import download_plotlyjs, plot
from geopy.geocoders import Nominatim
import json
import openrouteservice
from openrouteservice.directions import directions
from openrouteservice import convert
import time
flag = 0
api_key = "<API_KEY>" #openrouteservice api key
decoded = None
obj = None
app = Flask(__name__)
mapbox_access_token = '<MAPBOX-API-TOKEN>'
geolocator = Nominatim()
CORS(app)
mongo_client = MongoClient('localhost', 27017)
database_WT2 = mongo_client.WT2
app.secret_key = 'any random string'
car_collection = database_WT2.cars
def send_mail():
import smtplib, ssl
port = 587 # For starttls
smtp_server = "smtp.gmail.com"
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.image import MIMEImage
sender_email = "sender_email"
receiver_email = "receiver_email"
message = MIMEMultipart("alternative")
message["Subject"] = "Your cab for today is here."
message["From"] = sender_email
fp = open('cab.png', 'rb')
msgImage = MIMEImage(fp.read())
fp.close()
password = 'ikayqyrnisippuqn'
html = """\
<html>
<body>
<center>
<h2>Greetings from Cab Booking</h2>
<img src="cid:image1" width="25%" height="25%"></img>
<h4> Thank you for choosing us. Your cab is here. We hope you have a great day!!</h4>
</center>
</body>
</html>
"""
msgImage.add_header('Content-ID', '<image1>')
message.attach(msgImage)
part2 = MIMEText(html, "html")
message.attach(part2)
# Create secure connection with server and send email
context = ssl.create_default_context()
with smtplib.SMTP_SSL("smtp.gmail.com", 465, context=context) as server:
server.login(sender_email, password)
for i in receiver_email:
print(i)
server.sendmail(sender_email, i, message.as_string())
def haversine(lat1, lon1, lat2, lon2):
"""
Calculate the great circle distance between two points
on the earth (specified in decimal degrees)
"""
# convert decimal degrees to radians
lon1, lat1, lon2, lat2 = map(radians, [lon1, lat1, lon2, lat2])
# haversine formula
dlon = lon2 - lon1
dlat = lat2 - lat1
a = sin(dlat/2)**2 + cos(lat1) * cos(lat2) * sin(dlon/2)**2
c = 2 * asin(sqrt(a))
r = 6371 # Radius of earth in kilometers. Use 3956 for miles
# print(c)
# print(r)
return c * r
# print(haversine(12.9581473, 77.6542132304085, 12.985588, 77.645042))
def get_cars():
l = []
all_cars = car_collection.find({})
for i in all_cars:
l.append([i['latitude'], i['longitude'], i['_id']])
return l
def get_num_cars(lat, long, radius):
a = get_cars()
count = 0
cars = []
for i in a:
if(haversine(lat, long, i[0], i[1])<radius):
count+=1
cars.append(i)
return count, cars
def get_closest_distance(lat, long, num):
a = get_cars()
l1 = []
for i in a:
l1.append([haversine(lat, long, i[0], i[1]), i[2], [i[0], i[1]]])
l2 = sorted(l1, key = lambda val: val[0])
num = len(l2) if len(l2)<num else num
min_distance = None
answer = None
client = openrouteservice.Client(key=api_key)
for i in range(num):
coords = ((l2[i][2][1], l2[i][2][0]), (long, lat))
while(True):
try:
result = client.directions(coords)
geometry = result['routes'][0]['geometry']
break
except Exception as e:
print(e)
pass
decoded = convert.decode_polyline(geometry)
print(decoded)
print(result['routes'][0]['summary']['duration'])
distance = result['routes'][0]['summary']['duration']
if min_distance is None:
min_distance = distance
answer = [decoded['coordinates'], l2[i][1], [l2[i][2][0], l2[i][2][1]]]
elif distance < min_distance:
min_distance = distance
answer = [decoded['coordinates'], l2[i][1], [l2[i][2][0], l2[i][2][1]]]
print("\n")
return answer
class car_state:
def __init__(self, car_pos, line_points):
self.index = 0
self.car_pos = car_pos
self.line_points = line_points
self.segment_index = 0
self.segment_points = []
def move(self):
if(self.index >= len(self.line_points)):
return self.car_pos
if len(self.segment_points) == 0:
self.segment_index = 0
tmp = self.line_points[self.index]
latitude = tmp[0] - self.car_pos[0]
longitutde = tmp[1] - self.car_pos[1]
latitude_interval = latitude/5
longitutde_interval = longitutde/5
for i in range(1,5):
self.segment_points.append([self.car_pos[0]+i*latitude_interval,
self.car_pos[1]+i*longitutde_interval])
self.segment_points.append([tmp[0], tmp[1]])
segment_point = self.segment_points[self.segment_index]
self.car_pos = [segment_point[0], segment_point[1]]
self.segment_index+=1
if(self.segment_index>=len(self.segment_points)):
self.segment_points = []
self.index+=1
return self.car_pos
# tmp_car_pos = [12.98265, 77.63596]
# obj = car_state(tmp_car_pos, a)
def plot():
global mapbox_access_token
trace1 = go.Scattermapbox(lat=[12.9716],lon=[77.5946],marker={'size': 1, 'symbol': ["car"]} )
data = [trace1]
layout = go.Layout(
autosize=True, showlegend=False,
hovermode='closest',
mapbox=go.layout.Mapbox(
style="outdoors",
accesstoken=mapbox_access_token,
bearing=0,
center=go.layout.mapbox.Center(
lat=12.9716,
lon=77.5946),
pitch=0,
zoom=12
))
fig = go.Figure(data=data, layout=layout)
fig = json.dumps(fig, cls=plotly.utils.PlotlyJSONEncoder)
return fig
def plot_cars(source, cars, route):
global mapbox_access_token
lats = [i[0] for i in cars]
longs = [i[1] for i in cars]
ids = [i[2] for i in cars]
route_lats = [i[0] for i in route]
route_longs = [i[1] for i in route]
print("Number of Lats: ",len(lats))
trace1 = go.Scattermapbox(lat=lats,lon=longs,marker={'size': 18, 'symbol': ["car" for i in range(len(lats))]}, hovertext = ids, hoverinfo = "text")
trace2 = go.Scattermapbox(lat=[source.latitude],lon=[source.longitude],mode = "markers+text",marker={'size': 18, 'symbol': ["star"], 'color':'rgba(255, 0, 0, 1)'}, hovertext = ['Your Location'], hoverinfo = "text" )
trace3 = go.Scattermapbox(lat=route_lats,lon=route_longs, mode = 'lines', line = {'width': 3, 'color' : 'rgba(0, 0, 255, 1)'})
data = [trace1, trace2, trace3]
layout = go.Layout(
autosize=True, showlegend=False,
hovermode='closest',
mapbox=go.layout.Mapbox(
style="outdoors",
accesstoken=mapbox_access_token,
bearing=0,
center=go.layout.mapbox.Center(
lat=source.latitude,
lon=source.longitude),
pitch=0,
zoom=15
))
fig = go.Figure(data=data, layout=layout)
fig = json.dumps(fig, cls=plotly.utils.PlotlyJSONEncoder)
return fig
def plot_sim(obj, decoded):
line_points_index = obj.index
line_points = obj.line_points[line_points_index-1:]
lati = [i[0] for i in line_points]
long = [i[1] for i in line_points]
lati_sd = [i[0] for i in decoded]
long_sd = [i[1] for i in decoded]
fig = go.Figure(go.Scattermapbox(
lat=lati,
lon=long,
mode='lines'
))
pos = obj.move()
fig.add_trace(go.Scattermapbox(
lat=[pos[0]],
lon=[pos[1]],
mode='markers',
marker=go.scattermapbox.Marker(
size=20, symbol = "car"
),
))
fig.add_trace(go.Scattermapbox(
lat=lati_sd,
lon=long_sd,
mode='lines'
))
fig.update_layout(
autosize=True,
hovermode=False,
mapbox=go.layout.Mapbox(
accesstoken=mapbox_access_token,
bearing=0,
center=go.layout.mapbox.Center(
lat=obj.car_pos[0],
lon=obj.car_pos[1]
),
pitch=0,
zoom=15
),
)
# fig.show()
return json.dumps(fig, cls=plotly.utils.PlotlyJSONEncoder)
@app.route('/login', methods=['POST'])
def login():
req = eval(request.data)
users = database_WT2.user
user_doc = users.find_one({"username": req['username'], "password": req['password']})
session['username'] = req['username']
response = Response()
if(user_doc!=None):
response.status_code = 200
else:
response.status_code = 403
return response
@app.route('/loadStaticMap', methods=['GET'])
def loadMap():
return plot(), 200
@app.route('/confirm', methods=['POST'])
def confirmSim():
print("Inside Confirm!")
req = eval(request.data)
coords = ((req["source_long"], req["source_lat"]),(req["dest_long"], req["dest_lat"]))
client = openrouteservice.Client(key=api_key) # Specify your personal API key
# decode_polyline needs the geometry only
while(True):
try:
geometry = client.directions(coords)['routes'][0]['geometry']
break
except Exception as e:
print(e)
pass
global decoded
decoded = convert.decode_polyline(geometry)
decoded = decoded['coordinates']
for i in decoded:
i[0],i[1] = i[1],i[0]
closest_car = get_closest_distance(req['source_lat'], req['source_long'], 5);
for i in closest_car[0]:
i[0],i[1] = i[1],i[0]
print(closest_car)
global obj
obj = car_state(closest_car[2], closest_car[0])
return "", 200
@app.route('/logout',methods=['GET'])
def logout():
return "hello", 200
@app.route('/search',methods=['POST'])
def search():
req = eval(request.data)
geolocator = Nominatim()
while(True):
try:
source = geolocator.geocode(req['source'])
dest = geolocator.geocode(req['destination'])
break
except:
pass
print(source.latitude,source.longitude)
print(dest.latitude,dest.longitude)
i = 0
num_cars = 0
print("HELLO")
while(num_cars <= 5):
i += 0.5
num_cars, cars = get_num_cars(source.latitude, source.longitude, i)
print("The Number of cars is: ", num_cars)
coords = ((source.longitude, source.latitude),(dest.longitude, dest.latitude))
client = openrouteservice.Client(key=api_key) # Specify your personal API key
# decode_polyline needs the geometry only
while(True):
try:
geometry = client.directions(coords)['routes'][0]['geometry']
break
except:
pass
decoded = convert.decode_polyline(geometry)
decoded = decoded['coordinates']
for i in decoded:
i[0],i[1] = i[1],i[0]
return {"source_lat": source.latitude, "source_long": source.longitude, "dest_lat": dest.latitude, "dest_long": dest.longitude, "graph":plot_cars(source, cars, decoded)}
# return Response(status=400)
@app.route('/updateLoc', methods=['GET', 'POST'])
def updateLoc():
while(True):
global obj
global decoded
print(obj.index)
print(len(obj.line_points))
return Response(eventStream(obj, decoded), mimetype="text/event-stream")
def eventStream(obj, decoded):
while True:
time.sleep(1)
print(obj.index)
print(len(obj.line_points))
if(obj.index >= len(obj.line_points)):
global flag
if(flag == 0):
print("mail")
send_mail()
flag = 1
return
yield "data:{}\n\n".format(plot_sim(obj, decoded))
# @app.route('/moving', methods=['GET', 'POST'])
# def main():
# while(True):
# return Response(eventStream(), mimetype="text/event-stream")
if __name__ == '__main__':
app.run(debug=True)