Clinic Handler

Description

This component is part of the the distributed system DENTISTIMO, a web application that offers a geolocalisation based dental care booking system. The clinic handler provides other components with dentistry data and updates the database. More details can be found in the component diagram in the documentation repository.

System Architecture

Component Responsibilities

• Read dentist data from URL (https://raw.githubusercontent.com/feldob/dit355_2020/master/dentists.json)
• Save dentist data to database
• Listen to MQTT broker for dentist data requests from frontend (subscribed to topic: get_all_clinics)
• Publish dentistry data via MQTT (publish to topic: stored_new_clinic)

Data input and output

Data input

The component gets the dentist data from a JSON file.

The JSON objects should have at least these information for the following tasks:

• Store clinics: a JSON object following the clinic schema:

Example

{
  "dentists": [
    {
      "id": 1,
      "name": "Your Dentist",
      "owner": "Dan Tist",
      "dentists": 3,
      "address": "Spannmålsgatan 20",
      "city": "Gothenburg",
      "coordinate": {
        "longitude": 11.969388,
        "latitude": 57.707619
      },
      "openinghours": {
        "monday": "9:00-17:00",
        "tuesday": "8:00-17:00",
        "wednesday": "7:00-16:00",
        "thursday": "9:00-17:00",
        "friday": "9:00-15:00"
      }
   },

Data output

The component sends stringified JSON objects.

Installing and running

Prerequisits:

MQTT

You need to have a running version of MQTT on your machine. Please refer to this link to download the mosquitto broker if you do not have any.

Node.js

To download the latest version of node.js, please follow this link

Instructions

Step	Command
Start your MQTT broker on port 1883	This differs based on which broker, as well as your settings. Make sure the broker listens to port 1883. (Default port with mosquitto)
Clone this project on your machine	git clone < SSH address or HTTPS address >
Go to the repo and add .env file	Please contact one of the developers of this project to recieve the contents of the file. It should be placed directly in the repo.
Install necessary dependencies	npm install
Start the system from the repo by running the following	npm start

In the window of your broker, you should see a message similar to this:

1638885841: New client connected from 127.0.0.1:49531 as Dentistimo Team5 - Clinic Handler n°3c1ff99e (p2, c1, k60).

The Clinic Handler is now ready to proceed your requests.