{ lib
, writers
, curl
, jq
, homeserver
, roomId
, authToken
}:

writers.writeDashBin "notify" ''
  export PATH="$PATH:${lib.makeBinPath [ curl jq ]}"

  if test $(id -u) != 0; then
    echo 'you must be root to send a notice'
    exit 1
  fi

  token=$(cat ${authToken})
  url="${homeserver}/rooms/${roomId}/send/m.room.message?access_token=$token"

  if test $# -eq 1; then
    # send first arg as text
    msg=$(printf "%s" "$1" | jq -Rsc '{ "msgtype": "m.text", "body": . }')
  else
    # send stdin formatted as code
    msg=$(jq -Rsc '{
      "msgtype": "m.text",
      "format": "org.matrix.custom.html",
      "body": "",
      "formatted_body": ("<pre><code>" + . + "</code></pre>")
      }')
  fi

  curl -s "$url" -d "$msg"
''