Chopperbot

Your cute Slack & LINE bot assistant.

You can play with Chopperbot in LINE by scanning QR code below.

Usage 1: Split the bill

You can get the help from chopper to calculate your bill with this syntax.
(For LINE, don't use slash, start with just split)

/split NAME AMOUNT NAME AMOUNT ... [+v | +s]

The option can use to apply multiplication to all orders.
Note that the order of options matter in the calculation.

+v means add vat 7%
+s means add service charge 10%

Ex. Add a service charge

/split turbo 100 turbo 200 kendo 300 neo 400 +s

Chopper:
turbo 330
kendo 330
neo 440
---
total 1100

Ex. Add a share dish ("share" is for sharing dish)

/split turbo 100 turbo 200 kendo 300 neo 400 share 300

Chopper:
turbo 400
kendo 400
neo 500
---
total 1300

Ex. Add a discount (utilizing "share" for split discount)

/split turbo 100 kendo 200 kendo -1 share -100

Chopper:
kendo: 149.00 THB
turbo: 50.00 THB
---
total: 199.00 THB

Development

For Slack

Run the cowboy server

iex -S mix

Test by posting json data to the endpoint POST localhost:4000/split

{
	"text": "turbo 100 turbo 200 kendo 300 neo 400"
}

For LINE

Run the cowboy server with the channel access token

LINE_CHANNEL_ACCESS_TOKEN=xxxxx iex -S mix

Test by posting json data to the endpoint POST localhost:4000/line

{
	"events": [{
		"message": { "text": "turbo 100 turbo 200 kendo 300 neo 400"},
		"replyToken": "anything"
	}]
}

Deployment

For the first time, add the remote to Gigalixir.
GIGALIXIR_REMOTE_URL can be found in the setup instruction.

git remote add gigalixir GIGALIXIR_REMOTE_URL

Configure the required variables.

gigalixir config:set APP_URL=XXX
gigalixir config:set LINE_CHANNEL_ACCESS_TOKEN=YYY
gigalixir config:set APPSIGNAL_API_KEY=ZZZ

Once you have the gigalixir remote, just push to build.

git push gigalixir master

The application will be avilable on
https://APP_NAME.gigalixirapp.com/

Reference

For the detail on setting up Slack application, please check
https://www.monterail.com/blog/building-slackbot-with-elixir-phoenix