LINE API

LINE Messaging API

Here is the step for setup a LINE bot and using it in LibreNMS.

Use your real LINE account register in developer protal.
Add a new channel, choose Messaging API and continue fill up the forms, note that Channel name cannot edit later.
Go to "Messaging API" tab of your channel, here listing some important value.
- Bot basic ID and QR code is your LINE bot's ID and QR code.
- Channel access token (long-lived), will use it in LibreNMS, keep it safe.
Use your real Line account add your LINE bot as a friend.
Recipient ID can be groupID, userID or roomID, it will be used in LibreNMS to send message to a group or a user. Use the following NodeJS program and ngrok for temporally https webhook to listen it.

LINE-bot-RecipientFetcher
Run the program and using ngrok expose port to public
```
$ node index.js
$ ngrok http 3000
```
Go to "Messaging API" tab of your channel, fill up Webhook URL to https://<your ngrok domain>/webhook
If you want to let LINE bot send message to a yourself, use your real account to send a message to your LINE bot. Program will print out the userID in console.

sample value:
```
{"type":"user","userId":"U527xxxxxxxxxxxxxxxxxxxxxxxxxc0ee"}
```
If you want to let LINE bot send message to a group, do the following steps.
- Add your LINE bot into group
- Use your real account to send a message to group
Program will print out the groupID in console, it will be Recipient ID, keep it safe.

sample value:
```
{"type":"group","groupId":"Ce51xxxxxxxxxxxxxxxxxxxxxxxxxx6ef","userId":"U527xxxxxxxxxxxxxxxxxxxxxxxxxc0ee"} ```
```

Example:

Config	Example
Access token	fhJ9vH2fsxxxxxxxxxxxxxxxxxxxxlFU=
Recipient (groupID, userID or roomID)	Ce51xxxxxxxxxxxxxxxxxxxxxxxxxx6ef