#!/bin/bash
# I, Ian Kelling, follow the GNU license recommendations at
# https://www.gnu.org/licenses/license-recommendations.en.html. They
# recommend that small programs, < 300 lines, be licensed under the
# Apache License 2.0. This file contains or is part of one or more small
# programs. If a small program grows beyond 300 lines, I plan to switch
# its license to GPL.

# Copyright 2024 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# hacky way to kill off old leftover processes
pkill -O 1 -x 'prof-tail'

set -e; . /usr/local/lib/bash-bear; set +e

# kill 0 doesn't seem to be documented in man bash, but it kills the
# background processes.
# https://unix.stackexchange.com/questions/67532/what-does-kill-0-do-actually/67552
# commented out because the way I exit prof-tail is from an ssh disconnect from
# the connection dying or killing konsole, and this has no effect on either.
#trap "kill 0" EXIT


xmpp_users=(
  anoukr
  craigt
  dawnbp
  devinu
  gregf
  johnh
  jrasata
  ksiewicz
  michael
  miriam
  ruben
  zoe
  jtuttle
)

# start emacs daemon for profanity if it doesnt exist.
if ! pgrep -f '^emacs --daemon=profanity$' &>/dev/null; then
  emacs --daemon=profanity &>/dev/null
fi


while true; do
  midnight=$(date -d '00:00:00 tomorrow' +%s)
  secs_till_midnight=$(( midnight - EPOCHSECONDS ))
  log_today=$(date '+%Y_%m_%d').log
  logdir=/home/iank/.local/share/profanity/chatlogs/iank_at_fsf.org

  # when this fails, it has PIPESTATUS: 124 0 1 0 0, which seems to end up with 1 as the overall code, which is not what
  # i expected. todo: investigate if and why that is, and narrow the ||:
  # shellcheck disable=SC2046 # intentional
  timeout --foreground $secs_till_midnight tail -n0 -qF \
          $(for u in ${xmpp_users[@]}; do echo $logdir/${u}_at_fsf.org/$log_today; done) 2>/dev/null \
    | awk '$3 != "me:" {print $3; fflush()}'  | sed -u 's/^/pm /;s/@.*//' ||: &

  timeout --foreground $secs_till_midnight tail -n0 -qF \
          $logdir/rooms/*/$log_today 2>/dev/null \
    | awk '$3 != "iank:"' | grep -i '\biank\b' | awk '{print $3; fflush()}' | sed 's/^/room /;s/@.*//' ||:

  kill %
  sleep 1
done