Setting up Appservice Webhooks (optional)

The playbook can install and configure matrix-appservice-webhooks for you.

Setup Instructions:

loosely based on this

All you basically need is to adjust your inventory/host_vars/matrix.<domain-name>/host-vars.yml:

matrix_appservice_webhooks_enabled: true
matrix_appservice_webhooks_api_secret: '<your_secret>'

In case you want to change the verbosity of logging via journalctl -fu matrix-appservice-webhooks.service you can adjust this in inventory/host_vars/matrix.<domain-name>/host-vars.yml as well.
Note: default value is: info and availabe log levels are : info, verbose
```
matrix_appservice_webhooks_log_level: '<log_level>'
```
If you've already installed Matrix services using the playbook before, you'll need to re-run it (--tags=setup-all,start). If not, proceed with configuring other playbook services and then with Installing. Get back to this guide once ready.
Invite the bridge bot user to your room:
- either with:
```
/invite @_webhook:matrix.<domain.name>
```
  Note: Make sure you have administration permissions in your room
- or simply add the bridge bot to a private channel (personal channels imply you being an administrator)
Send a message to the bridge bot in order to receive a private message including the webhook link.
```
!webhook
```

The JSON body for posting messages will have to look like this:

{
    "text": "Hello world!",
    "format": "plain",
    "displayName": "My Cool Webhook",
    "avatarUrl": "http://i.imgur.com/IDOBtEJ.png"
}

You can test this via curl like so:

curl --header "Content-Type: application/json" \
--data '{
"text": "Hello world!",
"format": "plain",
"displayName": "My Cool Webhook",
"avatarUrl": "http://i.imgur.com/IDOBtEJ.png"
}' \
<the link you've gotten in 5.>

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Setting up Appservice Webhooks (optional)

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