360 lines
11 KiB
Nix
360 lines
11 KiB
Nix
{ config, pkgs, ... }:
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with import <stockholm/lib>;
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let
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name = "radio";
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mainUser = config.users.extraUsers.mainUser;
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music_dir = "/home/radio/music";
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add_random = pkgs.writeDashBin "add_random" ''
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${pkgs.mpc_cli}/bin/mpc add "$(${pkgs.findutils}/bin/find "${music_dir}/the_playlist" \
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| grep -Ev '/other/|/.graveyard/' \
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| grep '\.ogg$' \
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| shuf -n1 \
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| sed 's,${music_dir}/,,' \
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)"
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'';
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get_current_track_position = pkgs.writeDash "get_current_track_position" ''
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${pkgs.mpc_cli}/bin/mpc status | ${pkgs.gawk}/bin/awk '/^\[playing\]/ { sub(/\/.+/,"",$3); split($3,a,/:/); print a[1]*60+a[2] }'
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'';
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skip_track = pkgs.writeBashBin "skip_track" ''
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set -eu
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${add_random}/bin/add_random
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music_dir=${escapeShellArg music_dir}
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current_track=$(${pkgs.mpc_cli}/bin/mpc current -f %file%)
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track_infos=$(${print_current}/bin/print_current)
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skip_count=$(${pkgs.attr}/bin/getfattr -n user.skip_count --only-values "$music_dir"/"$current_track" || echo 0)
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if [[ "$current_track" =~ ^the_playlist/music/.* ]] && [ "$skip_count" -le 2 ]; then
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skip_count=$((skip_count+1))
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${pkgs.attr}/bin/setfattr -n user.skip_count -v "$skip_count" "$music_dir"/"$current_track"
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echo skipping: "$track_infos" skip_count: "$skip_count"
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else
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mkdir -p "$music_dir"/the_playlist/.graveyard/
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mv "$music_dir"/"$current_track" "$music_dir"/the_playlist/.graveyard/
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echo killing: "$track_infos"
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fi
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${pkgs.mpc_cli}/bin/mpc -q next
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'';
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good_track = pkgs.writeBashBin "good_track" ''
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set -eu
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music_dir=${escapeShellArg music_dir}
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current_track=$(${pkgs.mpc_cli}/bin/mpc current -f %file%)
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track_infos=$(${print_current}/bin/print_current)
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if [[ "$current_track" =~ ^the_playlist/music/.* ]]; then
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${pkgs.attr}/bin/setfattr -n user.skip_count -v 0 "$music_dir"/"$current_track"
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else
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mv "$music_dir"/"$current_track" "$music_dir"/the_playlist/music/ || :
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fi
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echo good: "$track_infos"
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'';
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track_youtube_link = pkgs.writeDash "track_youtube_link" ''
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${pkgs.mpc_cli}/bin/mpc current -f %file% \
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| ${pkgs.gnused}/bin/sed 's@.*\(.\{11\}\)\.ogg@https://www.youtube.com/watch?v=\1@'
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'';
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print_current = pkgs.writeDashBin "print_current" ''
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echo "$(${pkgs.mpc_cli}/bin/mpc current -f %file%) \
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$(${track_youtube_link})"
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'';
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print_current_json = pkgs.writeDashBin "print_current_json" ''
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${pkgs.jq}/bin/jq -n -c \
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--arg name "$(${pkgs.mpc_cli}/bin/mpc current)" \
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--arg artist "$(${pkgs.mpc_cli}/bin/mpc current -f %artist%)" \
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--arg title "$(${pkgs.mpc_cli}/bin/mpc current -f %title%)" \
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--arg filename "$(${pkgs.mpc_cli}/bin/mpc current -f %file%)" \
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--arg position "$(${get_current_track_position})" \
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--arg length "$(${pkgs.mpc_cli}/bin/mpc current -f %time%)" \
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--arg youtube "$(${track_youtube_link})" '{
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name: $name,
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artist: $artist,
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title: $title,
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filename: $filename,
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position: $position,
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length: $length,
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youtube: $youtube
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}'
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'';
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write_to_irc = pkgs.writeDash "write_to_irc" ''
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${pkgs.curl}/bin/curl -fsSv --unix-socket /home/radio/reaktor.sock http://z/ \
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-H content-type:application/json \
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-d "$(${pkgs.jq}/bin/jq -n \
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--arg text "$1" '{
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command:"PRIVMSG",
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params:["#the_playlist",$text]
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}'
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)"
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'';
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in {
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users.users = {
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"${name}" = rec {
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inherit name;
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group = name;
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uid = genid_uint31 name;
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description = "radio manager";
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home = "/home/${name}";
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useDefaultShell = true;
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createHome = true;
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openssh.authorizedKeys.keys = with config.krebs.users; [
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lass.pubkey
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lass-mors.pubkey
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];
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};
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};
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users.groups = {
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"radio" = {};
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};
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krebs.per-user.${name}.packages = with pkgs; [
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add_random
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good_track
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skip_track
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print_current
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print_current_json
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ncmpcpp
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mpc_cli
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];
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services.mpd = {
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enable = true;
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group = "radio";
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musicDirectory = "${music_dir}";
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extraConfig = ''
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log_level "default"
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auto_update "yes"
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audio_output {
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type "httpd"
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name "lassulus radio"
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encoder "vorbis" # optional
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port "8000"
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quality "5.0" # do not define if bitrate is defined
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# bitrate "128" # do not define if quality is defined
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format "44100:16:2"
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always_on "yes" # prevent MPD from disconnecting all listeners when playback is stopped.
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tags "yes" # httpd supports sending tags to listening streams.
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}
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'';
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};
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krebs.iptables = {
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tables = {
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filter.INPUT.rules = [
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{ predicate = "-p tcp --dport 8000"; target = "ACCEPT"; }
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{ predicate = "-i retiolum -p tcp --dport 8001"; target = "ACCEPT"; }
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];
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};
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};
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systemd.timers.radio = {
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description = "radio autoadder timer";
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = "*:0/1";
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};
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};
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systemd.services.radio = let
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autoAdd = pkgs.writeDash "autoAdd" ''
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LIMIT=$1 #in seconds
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timeLeft () {
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playlistDuration=$(${pkgs.mpc_cli}/bin/mpc --format '%time%' playlist | ${pkgs.gawk}/bin/awk -F ':' 'BEGIN{t=0} {t+=$1*60+$2} END{print t}')
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currentTime=$(${get_current_track_position})
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expr ''${playlistDuration:-0} - ''${currentTime:-0}
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}
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if test $(timeLeft) -le $LIMIT; then
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${add_random}/bin/add_random
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fi
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${pkgs.mpc_cli}/bin/mpc play > /dev/null
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'';
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in {
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description = "radio playlist autoadder";
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after = [ "network.target" ];
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restartIfChanged = true;
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serviceConfig = {
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ExecStart = "${autoAdd} 150";
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};
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};
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systemd.services.radio-recent = let
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recentlyPlayed = pkgs.writeDash "recentlyPlayed" ''
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LIMIT=1000 #how many tracks to keep in the history
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HISTORY_FILE=/tmp/played
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while :; do
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${pkgs.mpc_cli}/bin/mpc idle player > /dev/null
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${pkgs.mpc_cli}/bin/mpc current -f %file%
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done | while read track; do
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listeners=$(${pkgs.iproute}/bin/ss -Hno state established 'sport = :8000' | wc -l)
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echo "$(date -Is)" "$track" | tee -a "$HISTORY_FILE"
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echo "$(tail -$LIMIT "$HISTORY_FILE")" > "$HISTORY_FILE"
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${write_to_irc} "playing: $track listeners: $listeners"
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done
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'';
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in {
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description = "radio recently played";
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after = [ "mpd.service" "network.target" ];
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wantedBy = [ "multi-user.target" ];
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restartIfChanged = true;
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serviceConfig = {
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ExecStart = recentlyPlayed;
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User = "radio";
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};
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};
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# allow reaktor2 to modify files
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systemd.services."reaktor2-the_playlist".serviceConfig.DynamicUser = mkForce false;
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krebs.reaktor2.the_playlist = {
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hostname = "irc.freenode.org";
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port = "6697";
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useTLS = true;
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nick = "the_playlist";
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username = "radio";
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API.listen = "unix:/home/radio/reaktor.sock";
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plugins = [
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{
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plugin = "register";
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config = {
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channels = [
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"#the_playlist"
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"#krebs"
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];
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};
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}
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{
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plugin = "system";
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config = {
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workdir = config.krebs.reaktor2.the_playlist.stateDir;
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hooks.PRIVMSG = [
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{
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activate = "match";
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pattern = "^(?:.*\\s)?\\s*the_playlist:\\s*([0-9A-Za-z._][0-9A-Za-z._-]*)(?:\\s+(.*\\S))?\\s*$";
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command = 1;
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arguments = [2];
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commands = {
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skip.filename = "${skip_track}/bin/skip_track";
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next.filename = "${skip_track}/bin/skip_track";
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bad.filename = "${skip_track}/bin/skip_track";
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good.filename = "${good_track}/bin/good_track";
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nice.filename = "${good_track}/bin/good_track";
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like.filename = "${good_track}/bin/good_track";
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current.filename = "${print_current}/bin/print_current";
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suggest.filename = pkgs.writeDash "suggest" ''
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echo "$@" >> playlist_suggest
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'';
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};
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}
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];
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};
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}
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];
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};
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krebs.htgen.radio = {
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port = 8001;
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user = {
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name = "radio";
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};
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script = ''. ${pkgs.writeDash "radio" ''
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case "$Method $Request_URI" in
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"GET /current")
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printf 'HTTP/1.1 200 OK\r\n'
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printf 'Connection: close\r\n'
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printf '\r\n'
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${print_current_json}/bin/print_current_json
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exit
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;;
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"POST /skip")
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printf 'HTTP/1.1 200 OK\r\n'
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printf 'Connection: close\r\n'
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printf '\r\n'
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msg=$(${skip_track}/bin/skip_track)
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${write_to_irc} "$msg"
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echo "$msg"
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exit
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;;
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"POST /good")
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printf 'HTTP/1.1 200 OK\r\n'
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printf 'Connection: close\r\n'
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printf '\r\n'
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msg=$(${good_track}/bin/good_track)
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${write_to_irc} "$msg"
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echo "$msg"
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exit
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;;
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esac
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''}'';
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};
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services.nginx = {
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enable = true;
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virtualHosts."radio.lassul.us" = {
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forceSSL = true;
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enableACME = true;
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locations."/".extraConfig = ''
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proxy_set_header Host $host;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Host $host;
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proxy_set_header X-Forwarded-Server $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_pass http://localhost:8000;
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'';
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locations."= /recent".extraConfig = ''
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alias /tmp/played;
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'';
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};
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virtualHosts."lassul.us".locations."= /the_playlist".extraConfig = let
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html = pkgs.writeText "index.html" ''
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>lassulus playlist</title>
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</head>
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<body>
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<div style="display:inline-block;margin:0px;padding:0px;overflow:hidden">
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<iframe src="https://kiwiirc.com/client/irc.freenode.org/?nick=kiwi_test|?&theme=cli#the_playlist" frameborder="0" style="overflow:hidden;overflow-x:hidden;overflow-y:hidden;height:95%;width:100%;position:absolute;top:0px;left:0px;right:0px;bottom:0px" height="95%" width="100%"></iframe>
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</div>
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<div style="position:absolute;bottom:1px;display:inline-block;background-color:red;">
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<audio controls autoplay="autoplay"><source src="http://lassul.us:8000/radio.ogg" type="audio/ogg">Your browser does not support the audio element.</audio>
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</div>
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<!-- page content -->
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</body>
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</html>
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'';
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in ''
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default_type "text/html";
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alias ${html};
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'';
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};
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services.syncthing.declarative.folders."the_playlist" = {
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path = "/home/radio/music/the_playlist";
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devices = [ "mors" "phone" "prism" "xerxes" ];
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};
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krebs.permown."/home/radio/music/the_playlist" = {
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owner = "radio";
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group = "syncthing";
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umask = "0002";
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};
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}
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