#!/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 change
# to a recommended GPL license.

# 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.

# mutes or unmutes ffmpeg stream
# usage: toggle-mute [mute|unmute|mute notify]
#
#
# gets state from $HOME/.iank-stream-muted

if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR


v=0
notify=false
# note: condition duplicated in stream-clip, myi3statsus
if pgrep -fc '^ffmpeg.*icecast://source.*/fsf' >/dev/null; then
  if [[ $1 ]]; then
    case $1 in
      mute)
        v=0
        if [[ $2 == notify ]]; then
          notify=true
        fi
        ;;
      unmute)
        v=1
        ;;
      *)
        i3-nagbar -m "INVALID mute argument:$1" -t error -f "pango:monospace 30"
        ;;
    esac

  else
    v_state=$(cat $HOME/.iank-stream-muted) ||:
    case $v_state in
      1) : ;; # default action
      0) v=1 ;;
      *)
        i3-nagbar -m "FAILED GETTING MUTE STATE:$v" -t error -f "pango:monospace 30"
        ;;
    esac
  fi

  out=$(echo Parsed_volume_1 volume $v | zmqsend ||:)
  if [[ $out == "0 Success" ]]; then
    echo $v >$HOME/.iank-stream-muted
    if $notify; then
      dunstify -h string:x-dunst-stack-tag:alert "automuted"
    fi
  else
    i3-nagbar -m "FAILED ffmpeg volume:$v out:$out" -t error -f "pango:monospace 30"
  fi
fi


# note: i figured out how to do system input level muting, but I don't
# really have a use case for it other than being doubly sure that i'm
# muted. leaving it commented in case I figure out a use case, or I
# find the application level muting to be unreliable.

# uncomment and refactor for system muting
# muted=$(pactl get-source-mute @DEFAULT_SOURCE@ | awk '{print $2}' ||:)
# case $muted in
#   no) v=0 ;;
#   yes) v=1 ;;
# esac



# uncomment for system muting, and set $mute_p
# pactl set-source-mute @DEFAULT_SOURCE@ $mute_p