feat(makanek): host drachenlord radio and stream from zaatar

the streaming links from antenne-asb.ga serve OGG but they say they
serve MP3. so mpd gets confused.
therefore regularly fetches song urls from antenne-asb.ga, queues, and
broadcasts them.

configs/meddl.nix

@@ -0,0 +1,61 @@
+{ pkgs, config, ... }:
+let
+  meddlPort = 8000;
+in
+{
+  containers.meddl = {
+    autoStart = true;
+    config = {config, pkgs, ...}: {
+      environment.systemPackages = [ pkgs.mpc_cli ];
+      systemd.services.meddl = {
+        before = [ "mpd.service" ];
+        wantedBy = [ "mpd.service" ];
+        startAt = "*:00/10";
+        script = ''
+          set -efu
+          host=http://antenne-asb.ga
+
+          prepend_host() {
+            sed "s#^#$host/#"
+          }
+
+          ${pkgs.curl}/bin/curl -sSL "$host" \
+            | ${pkgs.pup}/bin/pup 'li a attr{href}' \
+            | prepend_host \
+            | while read -r song; do
+              song_url="$(${pkgs.curl}/bin/curl -sSL "$song" \
+                | ${pkgs.pup}/bin/pup 'audio source attr{src}' \
+                | prepend_host
+              )"
+              ${pkgs.mpc_cli}/bin/mpc add "$song_url"
+            done
+
+          ${pkgs.mpc_cli}/bin/mpc play
+        '';
+      };
+      services.mpd = {
+        enable = true;
+        extraConfig = ''
+          log_level "default"
+          volume_normalization "yes"
+
+          audio_output {
+            name "DrachenLord Radio"
+            type "httpd"
+            encoder "vorbis"
+            port "${toString meddlPort}"
+            bitrate "128"
+            format "44100:16:2"
+            always_on "yes"
+            tags "yes"
+          }
+        '';
+      };
+
+    };
+  };
+
+  services.nginx.virtualHosts."makanek.r".locations = {
+    "= /meddl.ogg".proxyPass = "http://127.0.0.1:${toString meddlPort}";
+  };
+}

configs/mpd.nix

@@ -39,7 +39,8 @@ in
 
   services.mpd-fm = {
     enable = true;
-    stationsFile = "/etc/mpd-fm/stations.json";
+    # stationsFile = "/etc/mpd-fm/stations.json";
+    stations = lib.lists.imap0 (id: {desc ? "", logo ? "https://picsum.photos/seed/${builtins.hashString "md5" stream}/300", stream, station}: { inherit id desc logo stream station; }) streams;
     webPort = 8080;
   };
 
@@ -70,7 +71,7 @@ in
     recommendedTlsSettings = true;
     virtualHosts.default = {
       basicAuth.dj = lib.strings.fileContents <system-secrets/mpd-web.key>;
-      locations."~ ^/listen" = {
+      locations."= /listen.ogg" = {
         proxyPass = "http://127.0.0.1:${toString multi-room-audio-port}";
       };
       locations."/" = {

lib/streams.nix

@@ -35,7 +35,7 @@ in [
     desc = "Diminutive from lassus (“weary, faint, tired”). A programming human. Doing superior professional art.";
   }
   {
-    stream = "ANTENNE_ASB_URL";
+    stream = "http://makanek.r/meddl.ogg";
     station = "Antenne ASB";
     logo = "https://antenne-asb.ga/logo.png";
     desc = "Nonstop Drachenlord Radio – Hier wird nicht nur, aber auch Meddl gespielt.";

systems/makanek/configuration.nix

@@ -11,6 +11,7 @@ in
     <niveum/configs/nextcloud.nix>
     <niveum/configs/save-space.nix>
     <niveum/configs/version.nix>
+    <niveum/configs/meddl.nix>
     <niveum/configs/urlwatch.nix>
     <niveum/configs/gitea.nix>
     <niveum/configs/matterbridge.nix>