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Add docs about emoji stealing (#364)

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I managed to steal some emoji, but I had to figure out the specifics the hard way. This should make it easier for future criminals.

Feel free to close if this documentation was omitted on purpose, I can imagine some reasons for why it might have.

Co-authored-by: timorl <timorl@disroot.org>
Reviewed-on: https://akkoma.dev/AkkomaGang/akkoma/pulls/364
Co-authored-by: timorl <timorl+akkomadev@disroot.org>
Co-committed-by: timorl <timorl+akkomadev@disroot.org>
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timorl 2022-12-30 02:58:06 +00:00 committed by floatingghost
parent bdc676e433
commit bca1c43dcb
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docs/docs/configuration/custom_emoji.md
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@ -67,3 +67,29 @@ Priority of tags assigns in emoji.txt and custom.txt:
Priority for globs:
`special group setting in config.exs > default setting in config.exs`
## Stealing emoji
Managing your emoji can be hard work, and you just want to have the cool emoji your friends use? As usual, crime comes to the rescue!
You can use the `Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy` [Message Rewrite Facility](../configuration/cheatsheet.md#mrf) to automatically add to your instance emoji that messages from specific servers contain. Note that this happens on message processing, so the emoji will be added only after your instance receives some interaction containing emoji _after_ configuring this.
To activate this you have to [configure](../configuration/cheatsheet.md#mrf_steal_emoji) it in your configuration file. For example if you wanted to steal any emoji that is not related to cinnamon and not larger than about 10K from `coolemoji.space` and `spiceenthusiasts.biz`, you would add the following:
```elixir
config :pleroma, :mrf,
policies: [
Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy
]
config :pleroma, :mrf_steal_emoji,
hosts: [
"coolemoji.space",
"spiceenthusiasts.biz"
],
rejected_shortcodes: [
".*cinnamon.*"
],
size_limit: 10000
```
Note that this may not obey emoji licensing restrictions. It's extremely unlikely that anyone will care, but keep this in mind for when Nintendo starts their own instance.