Oublier

It is a web application created using Flask, HTML/CSS, SQLLite3 and Twilio REST API (as messaging service) which will help in sending reminders to patients suffering from Amnesia.

The project was given as a task to be completed in a span of one week and certain criterias as the following had to be met :

1. Create a (basic) web based application where one can set his phone number.
2. Send an SMS every one hour except at night.
3. Try resending an SMS if it fails, but retry no more than 5 times. (There is only so much you can do!).
4. The web application should also log all the failed messages and tell an user for how many hours the application has been running.

#Setting Up and Usage:

1. Install all packages from requirements.txt.

2. Run the script tabledef.py to generate all required tables.

3. We will set up a couple of cron jobs on our system. A cron job can be set up on Ubuntu by the following commands. crontab -e

   Append the below line to the file.

   */2 * * * * /usr/bin/python /home/arpan/gitProjects/oublier/poll_otp.py
   This enables us to run the script poll_otp.py every 2 mins.

4. Launch the Web App by running the app.py. By default it will get hosted o n localhost:5002 .

#Design Considerations

1. Since the patient suffers from Amnesia, it will be diffcult for him to remember his phone number. Therefore for log-in we implement a OTP authentication system. This way all the user has to know is his phone number. Once he enters the phone number , we send the OTP which is valid for 40 seconds.

2. Added feature where user can subscribe or unsubscribe the service at his will. For this he has to login. Once he un-subscribes we stop sending him messages.

3. While sending a message and deciding on the sleep time of user, it was important to know his time-zone. We take the most minimal input information i.e the user's country, use Google API to find the timezone.

#Constraints:

1. Currently the application uses Twilio's Free Trial and therefore we will have to first verify a number from out Twilio Account before sending a message.

2. The app uses Google's geocoding API which has a limit of 2500 calls per day.

3. For seeing the error logs of the users, first log in and then upon hitting th e "show logs" button, you will see a json object.

4. Validation of user inputs while sign up has not been taken care of. The appli cation will throw exception in case of invalid country-code, phone-number or country name.