Broke out into own module

manifests/output.pp

+define mpd::output (
+  Enum['shout', 'null', 'fifo', 'pipe', 'alsa', 'roar', 'ao', 'oss',
+  'openal', 'pulse', 'jack', 'httpd', 'recorder'] $type,
+  Optional[Hash] $parameters = {},
+) {
+  require ::mpd::server
+
+  $content_base = @(EOF)
+    audio_output {
+      type "${type}"
+      name "${name}"
+    | EOF
+
+  $content_aux = $parameters.map |$k, $v| { "${k} \"${v}\"\n" }
+
+  concat::fragment { "mpd audio ${name}":
+    target  => '/etc/mpd.conf',
+    content => $content_base + $content_aux + '}',
+  }
+}

manifests/server.pp

+type Permission = Enum['read', 'add', 'control', 'admin']
+
+# See mpd(5)
+# TODO
+# audio_output, take mpd::output and get name
+class mpd::server (
+  String $music_directory,
+  String $mpd_home = '/var/lib/mpd',
+  Bool $follow_outside_symlinks = yes,
+  Bool $follow_inside_symlinks = yes,
+  String $db_file            = "${mpd_home}/database",
+  String $sticker_file       = "${mpd_home}/sticker.sql",
+  String $log_file           = "${mpd_home}/log",
+  String $pid_file           = "${mpd_home}/pid",
+  String $playlist_directory = "${music_directory}/playlists",
+  String $state_file         = "${mpd_home}/state",
+  String $user               = 'mpd',
+  String $bind_to_address    = 'any',
+  Integer $port              = 6600,
+  Enum['default','secure','verbose'] $log_level = default,
+  Bool $zeroconf_enabled = yes,
+  Optional[String] $zeroconf_name,
+  Optional[Array[Struct[{ name => String, permissions => Array[Permision]}]]] $password,
+  Optional[Array[Permission]] $default_permissions,
+  Optional[String] $audio_output_format,
+  Optional[Variant[Integer,String]] $samplerate_converter,
+  Optional[Enum['off', 'album', 'track', 'auto']] $replaygain,
+  Optional[Integer[-15,15]] $replaygain_preamp,
+  Optional[Bool] $volume_normalization,
+  Optional[Integer] $audio_buffer_size,
+  Optional[Integer[0,100]] $buffer_before_play,
+  Optional[String] $filesystem_charset,
+  Optional[String] $id3v1_encoding,
+  Optional[Bool] $gapless_mp3_playback,
+  Bool $save_absolute_paths_in_playlists = no,
+  Optional[Variant[Enum['none'],
+                  Array[Enum['artist', 'album', 'title',
+                              'track', 'name', 'genre',
+                              'date', 'composer', 'performer',
+                              'comment', 'disc']]]] $metadata_to_use,
+  Bool $auto_update = no,
+  Optional[Integer] $auto_update_depth,
+) {
+
+  concat { '/etc/mpd.conf':
+    ensure => present,
+  }
+
+  $hash = {
+    music_directory => $music_directory,
+
+    follow_outside_symlinks          => $follow_outside_symlinks,
+    follow_inside_symlinks           => $follow_inside_symlinks,
+    db_file                          => $db_file,
+    sticker_file                     => $sticker_file,
+    log_file                         => $log_file,
+    pid_file                         => $pid_file,
+    playlist_directory               => $playlist_directory,
+    state_file                       => $state_file,
+    user                             => $user,
+    bind_to_address                  => $bind_to_address,
+    port                             => $port,
+    log_level                        => $log_level,
+    zeroconf_enabled                 => $zeroconf_enabled,
+    save_absolute_paths_in_playlists => $save_absolute_paths_in_playlists,
+    auto_update                      => $auto_update,
+
+
+    zeroconf_name        => $zeroconf_name,
+    password             => $password,
+    default_permissions  => $default_permissions,
+    audio_output_format  => $audio_output_format,
+    samplerate_converter => $samplerate_converter,
+    replaygain           => $replaygain,
+    replaygain_preamp    => $replaygain_preamp,
+    volume_normalization => $volume_normalization,
+    audio_buffer_size    => $audio_buffer_size,
+    buffer_before_play   => $buffer_before_play,
+    filesystem_charset   => $filesystem_charset,
+    id3v1_encoding       => $id3v1_encoding,
+    gapless_mp3_playback => $gapless_mp3_playback,
+    metadata_to_use      => $metadata_to_use,
+    auto_update_depth    => $auto_update_depth,
+  }
+
+
+  concat::fragment { 'mpd_base_config':
+    target  => '/etc/mpd.conf',
+    content => $hash
+          .filter |$k, $v| { $v != undef }
+          .map |$k, $v| { "${k} \"${v}\"\n" }
+          .join()
+  }
+
+  service { 'mpd':
+    ensure => 'running',
+    enable => true,
+  }
+
+  case $facts['os']['family'] {
+    'RedHat': {
+      yumrepo { 'rpm-fusion':
+        ensure   => present,
+        baseurl  => 'https://download1.rpmfusion.org/free/el/updates/7/x86_64',
+        enabled  => true,
+        gpgcheck => yes,
+        gpgkey   => 'https://rpmfusion.org/keys?action=AttachFile&do=get&target=RPM-GPG-KEY-rpmfusion-free-el-7',
+      }
+
+      package { ['mpd']:
+        ensure  => installed,
+        require => Yumrepo['rpm-fusion'],
+      }
+    }
+    default: {
+      fail('Currently only works on CentOS')
+    }
+  }
+}