# DataPOS Vendor Point-of-Service Web App

Runs on vendors' point-of-service devices. The staff use it to manage the order queue, e.g. to alert
customers when their orders are ready.

## Running the App

First, install Nginx, copy the following into a new `.conf` file in its `conf.d/` directory and
restart it.

```
server {
  listen       8090;
  server_name  _;   # Promiscuous! Any host header allowed.

  location /qfx-api {
    rewrite /qfx-api/(.*) /$1 break;
    # Change this if you want to use the public API instance in staging instead of a local one.
    proxy_pass http://127.0.0.1:9000;
  }

  location / {
    rewrite /(.*) /$1 break;
    proxy_pass http://127.0.0.1:8001;
  }
}
```

Then serve the app by running `server.js` in this directory and go to
<http://localhost:8090/app/index.html>.

## Caching

The following is cached in local storage:

- `queueStatus` - number of items in the queue and timestamp for last event
- `queuedOrders` - list of orders including the contents and price
- `currentMenu` - The full menu which is used to populate orders with additional
  information, including the type of menu items (food, drink, etc.) and the
  display order for modifiers). Expires after 2 hours