[NOTE: I speak really bad English so bear with me for about 3 mins, or just look at the code(which is far more understandable in my opinion)).
What I built
Hello everyone,
I build an alarm job using several great npm packages and of course the Twilio API. The purpose of this alarm is to wake me up on a schedule via an SMS. The user can adjust his schedule via a json file(so it's super easy) and then magic happens. The app creates a cron job, that triggers on the date times of the json.
TADaaa
Link to Code
The code is open source and is located at https://github.com/alator21/Ding-time-to-work. It is licenced with the Apache 2.0 licence.
How I built it (what's the stack? did I run into issues or discover something new along the way?)
My stack contains:
- Node.js
- Typescript
It all started today when i randomly saw the twilio hackathon announcement.It caught my interest immediately. I knew that i could create something interesting with such amazing service as Twilio.I am fammiliar with typescript and Node.js so i was certain what stack i would use. Then i remembered that i have trouble waking up so that was my idea.
The first problem i encountered was, the timing. I hadn't use a cron job again so it was kinda unclear. Then i found the awesome npm package node-scedule(https://www.npmjs.com/package/node-schedule). It simplified my work instantly.It has an very easy and predictable API, allowing you to create easy cron jobs.
After i found the core function of the program, i had to design the classes.
Classes:
- Moment. This class represents a single moment we want the alarm to ring.
- Schedule. This class represents the whole schedule of days and times when the alarm must ring.
- Alarm. This class get as an input, a schedule, and alarms on when its time.
The rest was easy. I created a json file(schedule.json) and i parse it. Then i had to convert days names to number(0,6). There was a catch there. Javascript's Date function has a getDate() that return the index of the name.To my surprise the index of Monday was 1 and 0. The index 0 is Sunday. Other than that the rest was was pretty straighforward.
Instruction on how to run the program, are on the github(README).
Thanks for reading
Additional Resources/Info
https://www.npmjs.com/package/node-schedule
https://pm2.keymetrics.io/
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