feat(alerts): add Matrix support to alerts

[n194]

Description

This PR adds an alert for Matrix. Matrix is a decentralized messaging platform that allows to allows other applications to send messages via a webhook.

Type of change

• Bug fix (a change which fixes an issue).
• New feature (change which adds functionality).
• New Server (new server added).
• Refactor (restructures existing code).
• Comment update (typo, spelling, explanation, examples, etc).

Checklist

PR will not be merged until all steps are complete.

• This pull request links to an issue.
• This pull request uses the develop branch as its base.
• This pull request Subject follows the Conventional Commits standard.
• This code follows the style guidelines of this project.
• I have performed a self-review of my code.
• I have checked that this code is commented where required.
• I have provided a detailed with enough description of this PR.
• I have checked If documentation needs updating.

Documentation

TODO: Add a page to user docs
GameServerManagers/LinuxGSM-Docs#75

[dgibbs64]

Good idea. will merge as soon as I can. Please bear with me though as I am moving house soon :)

[h3o66]

All default configs need to be updated.
As well a update of the file lgsm/functions/alert.sh is needed

[n194]

I updated alert.sh. Is there any good way to update all the default configs automatically?

[jamiew0w]

I updated alert.sh. Is there any good way to update all the default configs automatically?

for i in $(find lgsm/config-default/config-lgsm/ -name _default.cfg); do sed -i 's%mailgunemail="email@myemail.com"%&\n\n# Matrix Alerts | https://docs.linuxgsm.com/alerts/matrix\nmatrixalert="off"\nmatrixtoken="accesstoken%g' $i; done

alerts look to be done alphabetically so this will insert it after mailgun, just update the matrixtoken="whatever" to whatever variables you need

[dgibbs64]

What is the best way for me to test this? I am currently doing an alerts refactor

[n194]

What is the best way for me to test this? I am currently doing an alerts refactor

The instructions at GameServerManagers/LinuxGSM-Docs#75 should work.