Ancurio · September 30, 2023 14:27 · Sep 30, 2023
diff --git a/purge_t2bot_ghosts.md b/purge_t2bot_ghosts.md
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+I recently migrated away from t2bot.io's discord<->matrix bridging (to a self-hosted one), which after figuring out all the nice synapse and systemd related pecularities left me with one last cleanup of all the `@_discord_ID:t2bot.io` ghosts haunting my previously bridged matrix rooms.
+
+In order to automate the process I wrote two scripts that I want to share; the main one is `purge_t2bot_ghosts.sh` which you provide with a room ID (the internal ones starting with a `!` and looking like a random-generated password), and an access token with admin priviledges; also note that due to the `_synapse` API these scripts are using, they must be executed on `localhost` (this might be rewritten to be used from anywhere, idk). You can optionally specify a delay in seconds between kicks to not trigger the built-in rate limit, but I've found 4 seconds (the default) to be exactly right.
+
+Tip: Do this before setting up any replacement bridges to avoid status spams on the Discord site.
+
+`purge_t2bot_ghosts.sh` (requires jq):
+```bash
+#!/bin/bash
+
+ROOM_ID=$1
+TOKEN=$2
+DELAY=${3:-4}
+
+curl 'http://localhost:8008/_synapse/admin/v1/rooms/'$ROOM_ID'/members?access_token='$TOKEN -X GET \
+ | jq -r '.members[]' | grep 't2bot\.io$' | \
+ xargs -I{} ./kick_usr.sh $ROOM_ID {} $TOKEN $DELAY
+```
+
+`kick_usr.sh`:
+```bash
+#!/bin/bash
+
+ROOMID=$1
+USERID=$2
+TOKEN=$3
+DELAY=$4
+
+echo "Kicking ${USERID}"
+curl 'http://localhost:8008/_matrix/client/v3/rooms/'$ROOMID'/kick?access_token='$TOKEN \
+-X POST --data '{"user_id": "'$USERID'"}'
+sleep $DELAY
+```
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