Index was translated. Also all necessary i18n code was added.

Also, disabled all listener handler, added POST /api/listener/icecast handler.

.gitignore

@@ -1,5 +1,6 @@
 bin/*
 !bin/.keep
 .vscode
-*.pug.go
-*.log
+*.log
+*_templ.go
+/test

Makefile

@@ -1,41 +1,63 @@
-TARGET:=dwelling-radio
+TARGET := dwelling-radio
 
-SYSDDIR_:=${shell pkg-config systemd --variable=systemdsystemunitdir}
-SYSDDIR:=${SYSDDIR_:/%=%}
+SYSDDIR_ := ${shell pkg-config systemd --variable=systemdsystemunitdir}
+SYSDDIR := ${SYSDDIR_:/%=%}
 
-DESTDIR:=
-PREFIX:=/usr/local
+DESTDIR ?=
+PREFIX ?= /usr/local
 
-FLAGS:=-modcacherw -trimpath
-LDFLAGS:= -ldflags "-s -w -X main.version=23.10.1" -tags osusergo,netgo
+VERSION ?= 24.38.0
 
-all: ${TARGET}
-.PHONY: ${TARGET} install uninstall install-jade run
+GOFLAGS := -buildmode=pie -modcacherw -mod=readonly -trimpath
+LDFLAGS := -ldflags "-linkmode=external -extldflags \"${LDFLAGS}\" -s -w -X main.version=${VERSION}" -tags osusergo,netgo
 
-${TARGET}:
-	go generate web/web.go
-	go build -o bin/$@ ${LDFLAGS} ${FLAGS} cmd/$@/main.go
+.PHONY: run install uninstall clean
 
-install-jade:
-	go install github.com/Joker/jade/cmd/jade@latest
+${TARGET}: web/*_templ.go
+	go build -o bin/$@ ${LDFLAGS} ${GOFLAGS} cmd/$@/main.go
 
-run:
-	bin/dwelling-radio -no-liquidsoap -conf configs/config.test.yaml
+web/*_templ.go: web/*.templ
+ifeq (,$(wildcard $(shell go env GOPATH)/bin/templ))
+	go install github.com/a-h/templ/cmd/templ@latest
+endif
+	$(shell go env GOPATH)/bin/templ generate
+
+run: | ${TARGET}
+	bin/dwelling-radio -listen 127.0.0.1:18322 \
+		-work-dir test \
+		-playlist test
 
 install:
 	install -Dm 0755 bin/${TARGET} ${DESTDIR}${PREFIX}/bin/${TARGET}
 	install -Dm 0755 tools/radioctl ${DESTDIR}${PREFIX}/bin/${TARGET}ctl
-	install -Dm 0644 configs/config.yaml ${DESTDIR}/etc/dwelling/radio.yaml
-	install -Dm 0644 configs/radio.liq ${DESTDIR}/etc/dwelling/radio.liq
-	install -Dm 0644 configs/radio.vars.liq ${DESTDIR}/etc/dwelling/radio.vars.liq
-	install -Dm 0644 configs/logrotate ${DESTDIR}/etc/logrotate.d/${TARGET}
 
-	install -Dm 0644 init/systemd.service ${DESTDIR}/${SYSDDIR}/${TARGET}.service
+	install -Dm 0755 tools/radio-fetch ${DESTDIR}${PREFIX}/bin/${TARGET}-fetch
+
+#	install -Dm 0644 configs/radio.liq ${DESTDIR}/etc/dwelling/radio.liq
+#	install -Dm 0644 configs/radio.vars.liq ${DESTDIR}/etc/dwelling/radio.vars.liq
+	install -Dm 0644 configs/ezstream.xml ${DESTDIR}/etc/dwelling/ezstream.xml
+	install -Dm 0644 configs/logrotate ${DESTDIR}/etc/logrotate.d/${TARGET}
+	install -Dm 0644 configs/override.icecast.service ${DESTDIR}/etc/systemd/system/icecast.service.override.d/override.conf
+
+	install -Dm 0644 init/radio.service ${DESTDIR}/${SYSDDIR}/${TARGET}.service
+#	install -Dm 0644 init/liquidsoap.service ${DESTDIR}/${SYSDDIR}/${TARGET}-liquidsoap.service
+	install -Dm 0644 init/ezstream.service ${DESTDIR}/${SYSDDIR}/${TARGET}-ezstream.service
 
 uninstall:
 	rm ${DESTDIR}${PREFIX}/bin/${TARGET}
 	rm ${DESTDIR}${PREFIX}/bin/${TARGET}ctl
-	rm ${DESTDIR}/etc/dwelling/radio.liq
-	rm ${DESTDIR}/etc/logrotate.d/${TARGET}
 
-	rm ${DESTDIR}${SYSDDIR}/${TARGET}.service
+	rm ${DESTDIR}${PREFIX}/bin/${TARGET}-fetch
+
+#	rm ${DESTDIR}/etc/dwelling/radio.liq
+	rm ${DESTDIR}/etc/dwelling/ezstream.xml
+	rm ${DESTDIR}/etc/logrotate.d/${TARGET}
+	rm ${DESTDIR}/etc/systemd/system/icecast.service.override.d/override.conf
+
+	rm ${DESTDIR}${SYSDDIR}/${TARGET}.service
+#	rm ${DESTDIR}${SYSDDIR}/${TARGET}-liquidsoap.service
+	rm ${DESTDIR}${SYSDDIR}/${TARGET}-ezstream.service
+
+clean:
+	rm -f web/*.jade.go
+	go clean

build/archlinux/PKGBUILD

@@ -1,37 +1,27 @@
 # Maintainer: Alexander "Arav" Andreev <me@arav.su>
 pkgname=dwelling-radio
-pkgver=23.10.1
+pkgver=24.38.0
 pkgrel=1
 pkgdesc="Arav's dwelling / Radio"
 arch=('i686' 'x86_64' 'arm' 'armv6h' 'armv7h' 'aarch64')
 url="https://git.arav.su/Arav/dwelling-radio"
 license=('MIT')
-groups=()
-depends=()
 makedepends=('go>=1.17')
 optdepends=(
     'tree: to make a filelist html file'
-    'ffmpeg: to convert media to ogg')
-provides=('dwelling-radio')
-conflicts=('dwelling-radio')
-replaces=()
-backup=('etc/dwelling/radio.yaml' 'etc/dwelling/radio.vars.liq')
-options=()
-install=
-source=('https://git.arav.su/Arav/dwelling-radio/archive/23.10.1.tar.gz')
-noextract=()
+    'ffmpeg: to convert media to ogg and get duration of songs')
+backup=('etc/dwelling/ezstream.xml')
+source=("${pkgver}.tar.gz::https://git.arav.su/Arav/dwelling-radio/archive/v${pkgver}.tar.gz")
 md5sums=('SKIP')
 
 build() {
     cd "$srcdir/$pkgname"
-
     export GOPATH="$srcdir"/gopath
-
-    if [ ! -f "$(go env GOPATH)/bin/jade" ]; then
-        make DESTDIR="$pkgdir" install-jade
-    fi
-
-    make DESTDIR="$pkgdir" PREFIX="/usr"
+    export CGO_CPPFLAGS="${CPPFLAGS}"
+    export CGO_CFLAGS="${CFLAGS}"
+    export CGO_CXXFLAGS="${CXXFLAGS}"
+    export CGO_LDFLAGS="${LDFLAGS}"
+    make VERSION=$pkgver DESTDIR="$pkgdir" PREFIX="/usr"
 }
 
 package() {

cmd/dwelling-radio/main.go

@@ -1,98 +1,159 @@
 package main
 
 import (
-	"dwelling-radio/internal/configuration"
-	"dwelling-radio/internal/http"
+	ihttp "dwelling-radio/internal/http"
 	"dwelling-radio/internal/radio"
-	"errors"
+	sqlite_stats "dwelling-radio/internal/statistics/db/sqlite"
+	"dwelling-radio/pkg/utils"
+	"dwelling-radio/web"
+	"dwelling-radio/web/locales"
 	"flag"
 	"fmt"
-	"io/fs"
 	"log"
+	"net/http"
 	"os"
 	"os/signal"
+	"path"
 	"syscall"
+
+	"git.arav.su/Arav/httpr"
+	"github.com/invopop/ctxi18n"
+)
+
+var (
+	listenAddress = flag.String("listen", "/var/run/dwelling-radio/sock", "listen address (ip:port|unix_path)")
+	workDirPath   = flag.String("work-dir", "/mnt/data/appdata/radio", "path to a working directory")
+	playlistName  = flag.String("playlist", "all-rand", "a playlist name")
+	songListLen   = flag.Int64("list-length", 10, "number of songs to show in last N songs table")
+
+	showVersion = flag.Bool("v", false, "show version")
 )
 
 var version string
 
-var configPath *string = flag.String("conf", "config.yaml", "path to configuration file")
-var noLiquidsoap *bool = flag.Bool("no-liquidsoap", false, "don't run liquidsoap")
-var showVersion *bool = flag.Bool("v", false, "show version")
-
 func main() {
 	flag.Parse()
+	log.SetFlags(log.Lshortfile)
 
 	if *showVersion {
-		fmt.Println("dwelling-radio ver.", version, "\nCopyright (c) 2022,2023 Alexander \"Arav\" Andreev <me@arav.su>")
+		fmt.Println("dwelling-radio ver.", version, "\nCopyright (c) 2022-2024 Alexander \"Arav\" Andreev <me@arav.su>")
 		return
 	}
 
-	log.SetFlags(log.Lshortfile)
+	stats, err := sqlite_stats.New(path.Join(*workDirPath, "statistics.db3"))
+	if err != nil {
+		log.Fatalln("Statistics:", err)
+	}
+	defer stats.Close()
 
-	config, err := configuration.Load(*configPath)
+	currentSong := radio.Song{}
+	lstnrs := radio.NewListenerCounter()
+
+	plylst, err := radio.NewPlaylist(path.Join(*workDirPath, "playlists", *playlistName), true)
 	if err != nil {
 		log.Fatalln(err)
 	}
 
-	if typ, addr := config.SplitNetworkAddress(); typ == "unix" {
-		defer os.Remove(addr)
+	if err := ctxi18n.LoadWithDefault(locales.Content, "en"); err != nil {
+		log.Fatalln(err)
 	}
 
-	if data, err := os.ReadFile(config.MostListenedSongPath); err == nil {
-		if err := radio.LoadMostListenedSong(data); err != nil {
+	r := httpr.New()
+
+	r.Handler(http.MethodGet, "/", func(w http.ResponseWriter, r *http.Request) {
+		lst, err := stats.LastNSongs(*songListLen)
+		if err != nil {
+			log.Printf("Failed to fetch last N songs: %s\n", err)
+		}
+
+		lstnrs.RLock()
+		defer lstnrs.RUnlock()
+		web.Index(version, &currentSong, lst, *songListLen, lstnrs, r).Render(r.Context(), w)
+	})
+
+	r.Handler(http.MethodGet, "/filelist", func(w http.ResponseWriter, r *http.Request) {
+		data, err := os.ReadFile(path.Join(*workDirPath, "filelist.html"))
+		if err != nil {
+			http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+			return
+		}
+
+		w.Header().Add("Content-Type", "text/html")
+		w.Header().Add("Link", "<"+utils.Site(r.Host)+"/filelist>; rel=\"canonical\"")
+		w.Write(data)
+	})
+
+	r.Handler(http.MethodGet, "/playlist", web.ServeAsset("playlist.m3u", "", "radio.arav.su.m3u"))
+
+	r.Handler(http.MethodGet, "/robots.txt", web.ServeAsset("robots.txt", "text/plain", ""))
+	r.Handler(http.MethodGet, "/sitemap.xml", web.ServeAsset("sitemap.xml", "application/xml", ""))
+	r.Handler(http.MethodGet, "/favicon.svg", web.ServeAsset("favicon.svg", "image/svg", ""))
+
+	r.ServeStatic("/assets/*filepath", web.Assets())
+
+	djh := ihttp.NewDJHandlers(lstnrs, plylst, stats, &currentSong, *songListLen, path.Join(*workDirPath, "fallback.ogg"))
+
+	s := r.Sub("/api")
+
+	s.Handler(http.MethodPost, "/listener/icecast", djh.ListenersUpdateIcecast)
+	s.Handler(http.MethodGet, "/playlist", djh.PlaylistNext)
+	s.Handler(http.MethodGet, "/status", djh.Status)
+
+	srv := ihttp.NewHttpServer(I18nMiddleware(r))
+
+	if err := srv.Start(*listenAddress); err != nil {
+		log.Fatalln(err)
+	}
+
+	defer func() {
+		if err := srv.Stop(); err != nil {
 			log.Fatalln(err)
 		}
-	}
+	}()
 
-	playlistWatcher := radio.NewPlaylistLogWatcher()
-	if err := playlistWatcher.Watch(config.Icecast.Playlist, config.ListLastNSongs); err != nil {
-		log.Fatalln(err)
-	}
-	defer playlistWatcher.Close()
+	sysSignal := make(chan os.Signal, 1)
+	signal.Notify(sysSignal, os.Interrupt, syscall.SIGINT, syscall.SIGTERM, syscall.SIGABRT, syscall.SIGSEGV, syscall.SIGHUP)
 
-	hand := http.NewHandlers(config)
-	srv := http.NewHttpServer()
-
-	srv.ServeStatic("/assets/*filepath", hand.AssetsFS())
-
-	srv.GET("/", hand.Index)
-
-	srv.GET("/status", hand.Status)
-	srv.GET("/lastsong", hand.LastSong)
-
-	srv.GET("/playlist", hand.Playlist)
-	srv.GET("/filelist", hand.Filelist)
-
-	srv.GET("/robots.txt", hand.RobotsTxt)
-
-	if !*noLiquidsoap {
-		liquid, err := radio.NewLiquidsoap(config.Liquidsoap.ExecPath, config.Liquidsoap.ScriptPath)
-		if err != nil {
-			log.Fatalln("liquidsoap:", err)
-		}
-
-		defer func() {
-			if err := liquid.Stop(); err != nil {
-				if !errors.Is(err, radio.ErrLiquidsoapNotRunning) {
-					log.Println(err)
+	for {
+		switch <-sysSignal {
+		case os.Interrupt, syscall.SIGINT, syscall.SIGTERM, syscall.SIGABRT, syscall.SIGSEGV:
+			if currentSong.Artist != "" {
+				lstnrs.Lock()
+				defer lstnrs.Unlock()
+				currentSong.Listeners, currentSong.PeakListeners = lstnrs.Reset()
+				if err := stats.Add(&currentSong); err != nil {
+					log.Println("failed to save a current song during a shutdown:", err)
 				}
 			}
-		}()
-	}
-
-	if err := srv.Start(config.SplitNetworkAddress()); err != nil {
-		log.Fatalln(err)
-	}
-
-	doneSignal := make(chan os.Signal, 1)
-	signal.Notify(doneSignal, os.Interrupt, syscall.SIGINT, syscall.SIGTERM, syscall.SIGSEGV)
-
-	<-doneSignal
-
-	os.WriteFile(config.MostListenedSongPath, radio.StoreMostListenedSong(), fs.ModePerm)
-
-	if err := srv.Stop(); err != nil {
-		log.Fatalln(err)
+			return
+		case syscall.SIGHUP:
+			plylst.Lock()
+			defer plylst.Unlock()
+			if err := plylst.Reload(); err != nil {
+				log.Println(err)
+			}
+		}
 	}
 }
+
+func I18nMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		lang := "en"
+
+		if lq := r.URL.Query().Get("lang"); lq != "" {
+			lc := http.Cookie{Name: "lang", Value: lq, HttpOnly: false, MaxAge: 0}
+			http.SetCookie(w, &lc)
+			lang = lq
+		} else if l, err := r.Cookie("lang"); err == nil {
+			lang = l.Value
+		} else if al := r.Header.Get("Accept-Language"); al != "" {
+			lang = r.Header.Get("Accept-Language")
+		}
+
+		ctx, err := ctxi18n.WithLocale(r.Context(), lang)
+		if err != nil {
+			log.Println("i18nmw:", err)
+		}
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}

configs/config.test.yaml

@@ -1,15 +0,0 @@
-# Sets network type (could be tcp{,4,6}, unix)
-# and address:port or /path/to/unix.sock to
-# listen on.
-listen_on: "tcp 127.0.0.1:16387"
-icecast:
-  # URL to Icecast's status-json.xsl
-  url: "http://radio.arav.home.arpa/status-json.xsl"
-  playlist_path: "playlist.log"
-filelist_path: "/srv/radio/filelist.html"
-most_listened_song_file_path: "/mnt/data/appdata/mostlistenedsong"
-liquidsoap:
-  executable_path: "/opt/opam/4.14.0/bin/liquidsoap"
-  script_path: "/etc/dwelling/radio.liq"
-# How much songs to list on a page
-list_last_n_songs: 10

configs/config.yaml

@@ -1,15 +0,0 @@
-# Sets network type (could be tcp{,4,6}, unix)
-# and address:port or /path/to/unix.sock to
-# listen on.
-listen_on: "unix /var/run/dwelling-radio/sock"
-icecast:
-  # URL to Icecast's status-json.xsl
-  url: "http://radio.arav.home.arpa/status-json.xsl"
-  playlist_path: "/var/log/icecast/playlist.log"
-filelist_path: "/srv/radio/filelist.html"
-most_listened_song_file_path: "/mnt/data/appdata/mostlistenedsong"
-liquidsoap:
-  executable_path: "/opt/opam/4.14.0/bin/liquidsoap"
-  script_path: "/etc/dwelling/radio.liq"
-# How much songs to list on a page
-list_last_n_songs: 10

configs/ezstream.xml

@@ -0,0 +1,46 @@
+<ezstream>
+  <servers>
+    <server>
+      <name>default</name>
+      <protocol>HTTP</protocol>
+      <hostname>127.0.0.1</hostname>
+      <port>8000</port>
+      <password>SOURCEPWD</password>
+    </server>
+  </servers>
+  <streams>
+    <stream>
+      <name>default</name>
+      <mountpoint>/stream.ogg</mountpoint>
+      <public>Yes</public>
+      <intake>dwelling-radio</intake>
+      <server>default</server>
+      <format>Ogg</format>
+      <stream_name>Arav's dwelling / Radio</stream_name>
+      <stream_url>https://radio.arav.su</stream_url>
+      <stream_genre>Various</stream_genre>
+      <stream_description>Broadcasting from under my desk.</stream_description>
+      <stream_bitrate>128</stream_bitrate>
+      <stream_samplerate>44100</stream_samplerate>
+      <stream_channels>2</stream_channels>
+    </stream>
+  </streams>
+  <intakes>
+    <intake>
+      <name>default</name>
+      <type>playlist</type>
+      <filename>/mnt/data/appdata/radio/playlists/all-rand</filename>
+    </intake>
+    <intake>
+      <name>dwelling-radio</name>
+      <type>program</type>
+      <filename>/usr/bin/dwelling-radio-fetch</filename>
+    </intake>
+  </intakes>
+  <metadata>
+    <format_str>@a@ - @t@</format_str>
+    <refresh_interval>-1</refresh_interval>
+    <normalize_strings>No</normalize_strings>
+    <no_updates>No</no_updates>
+  </metadata>
+</ezstream>

configs/icecast.xml

@@ -0,0 +1,82 @@
+<icecast>
+	<hostname>radio.arav.su</hostname>
+	<location>Somewhere in Russia</location>
+	<admin>admin@arav.su</admin>
+
+	<limits>
+		<clients>128</clients>
+		<sources>2</sources>
+		<queue-size>524288</queue-size>
+		<client-timeout>30</client-timeout>
+		<header-timeout>15</header-timeout>
+		<source-timeout>10</source-timeout>
+		<burst-on-connect>1</burst-on-connect>
+		<burst-size>65535</burst-size>
+	</limits>
+
+	<authentication>
+		<source-password>SOURCEPWD</source-password>
+		<relay-password>RELAYPWD</relay-password>
+		<admin-user>admin</admin-user>
+		<admin-password>ADMINPWD</admin-password>
+	</authentication>
+
+	<directory>
+		<yp-url-timeout>15</yp-url-timeout>
+		<yp-url>http://dir.xiph.org/cgi-bin/yp-cgi</yp-url>
+	</directory>
+
+	<listen-socket>
+		<port>8000</port>
+		<bind-address>127.0.0.1</bind-address>
+	</listen-socket>
+
+	<http-headers>
+		<header name="Access-Control-Allow-Origin" value="*" />
+	</http-headers>
+
+
+	<mount type="normal">
+		<mount-name>/stream.ogg</mount-name>
+		<charset>UTF8</charset>
+		<public>1</public>
+		<authentication type="url">
+			<option name="listener_add" value="https://radio.arav.su/api/listener/icecast"/>
+			<option name="listener_remove" value="https://radio.arav.su/api/listener/icecast"/>
+			<option name="auth_header" value="Icecast-Auth-User: 1"/>
+		</authentication>
+	</mount>
+
+	<mount type="normal">
+		<mount-name>/test.ogg</mount-name>
+		<charset>UTF8</charset>
+		<public>0</public>
+	</mount>
+
+
+	<paths>
+		<basedir>/usr/share/icecast</basedir>
+		<logdir>/var/log/icecast</logdir>
+		<webroot>/usr/share/icecast/web</webroot>
+		<adminroot>/usr/share/icecast/admin</adminroot>
+		<alias source="/" destination="/status.xsl"/>
+		<x-forwarded-for>192.168.144.2</x-forwarded-for>
+	</paths>
+
+	<logging>
+		<accesslog>access.log</accesslog>
+		<errorlog>error.log</errorlog> 
+		<playlistlog>playlist.log</playlistlog> 
+		<loglevel>1</loglevel> <!-- 4 Debug, 3 Info, 2 Warn, 1 Error -->
+		<logsize>10000</logsize> <!-- Max size of a logfile -->
+		<logarchive>0</logarchive>
+	</logging>
+
+	<security>
+		<chroot>0</chroot>
+		<changeowner>
+			<user>icecast</user>
+			<group>icecast</group>
+		</changeowner>
+	</security>
+</icecast>

configs/logrotate

@@ -1,5 +1,6 @@
 /var/log/dwelling-radio/*log {
     nocreate
+    copytruncate
     missingok
     notifempty
     size 10M
@@ -8,8 +9,4 @@
     compressext .zst
     compressoptions -T0 --long -15
     uncompresscmd /usr/bin/unzstd
-    sharedscripts
-    postrotate
-        /bin/pkill -HUP dwelling-radio
-    endscript
 }

configs/nginx.conf

@@ -1,10 +1,11 @@
 server {
-	listen  443  ssl  http2;
-#	listen  8090; # Tor
-	listen  127.0.0.1:8111; # I2P
+	listen  443  ssl;
+	listen  8091; # Tor I2P
 	listen  [300:a98d:d6d0:8a08::e]:80; # Yggdrasil
 
-	server_name  radio.arav.su radio.arav.i2p mkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion;
+	http2 on;
+
+	server_name  radio.arav.su radio.arav.i2p plkybcgxt4cdanot75cy3pbnqlbqcsrib2fmrpsnug4bqphqvfda.b32.i2p mkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion;
 
 	access_log  /var/log/nginx/dwelling/radio.log  main  if=$nolog;
 
@@ -16,7 +17,7 @@ server {
 	add_header  X-Content-Type-Options     "nosniff";
 	add_header  X-XSS-Protection           "1; mode=block";
 	add_header  Strict-Transport-Security  "max-age=31536000; includeSubDomains; preload";
-#	add_header  Onion-Location             "http://mkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion$request_uri";
+	add_header  Onion-Location             "http://wsmkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion$request_uri";
 
 
 	location / {
@@ -28,6 +29,7 @@ server {
 
 	location /live/ {
 		proxy_pass        http://127.0.0.1:8000/;
+		proxy_bind        $remote_addr transparent;
 		proxy_buffering   off;
 		proxy_set_header  X-Real-IP  $remote_addr;
 	}
@@ -35,10 +37,22 @@ server {
 	location /live/admin/ {
 		deny  all;
 	}
+
+	location /api/listener/icecast {
+		allow 127.0.0.1;
+		allow 192.168.144.2;
+		deny all;
+	}
+
+	location /api/playlist {
+		allow 127.0.0.1;
+		allow 192.168.144.2;
+		deny all;
+	}
 }
 
 server {
-	listen  8000;
+	listen  192.168.144.2:8000;
 
 	server_name  radio.arav.su;
 
@@ -48,12 +62,14 @@ server {
 	add_header X-Frame-Options         "DENY";
 	add_header X-Content-Type-Options  "nosniff";
 	add_header X-XSS-Protection        "1; mode=block";
-#	add_header Onion-Location          "http://mkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion/live$request_uri";
+	add_header Onion-Location          "http://wsmkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion/live$request_uri";
 
 
 	location / {
-		proxy_pass       http://127.0.0.1:8000/;
-		proxy_buffering  off;
+		proxy_pass        http://127.0.0.1:8000/;
+		proxy_bind        $remote_addr transparent;
+		proxy_buffering   off;
+		proxy_set_header  X-Real-IP  $remote_addr;
 	}
 
 	location /admin/ {

configs/override.icecast.service

@@ -0,0 +1,3 @@
+[Unit]
+Requires=dwelling-radio.service
+After=dwelling-radio.service

configs/radio.liq

@@ -10,8 +10,8 @@ end
 def xfade(a, b)
     add(normalize = false,
         [ sequence([ blank(duration = 2.),
-                     fade.initial(duration = 2., b)]),
-          fade.final(duration = 2., a)])
+                     fade.in(duration = 2., b)]),
+          fade.out(duration = 2., a)])
 end
 
 def fallback_alter_title(m) =
@@ -19,12 +19,12 @@ def fallback_alter_title(m) =
      ("title", string.concat(["No stream. (Playing ", m["artist"], " - ", m["title"], ")"]))]
 end
 
-settings.server.telnet.set(false)
-settings.harbor.bind_addrs.set(["0.0.0.0"])
-settings.log.level.set(1)
-settings.log.file.set(true)
-settings.log.file.path.set(log_file_path)
-settings.log.stdout.set(false)
+settings.server.telnet := false
+settings.harbor.bind_addrs := ["0.0.0.0"]
+settings.log.level := 1
+settings.log.file := true
+settings.log.file.path := log_file_path
+settings.log.stdout := false
 
 enable_replaygain_metadata()
 

configs/radio.vars.liq

@@ -6,13 +6,13 @@ radio_url = "https://radio.arav.su"
 radio_name = "Arav's dwelling / Radio"
 radio_desc = "Broadcasting from under my desk."
 
-radio_dir = "/srv/radio/"
+radio_dir = "/mnt/data/appdata/radio/"
 
 harbor_port = 8002
 harbor_password = ""
 
 icecast_host = "127.0.0.1"
-icecast_port = 8000
+icecast_port = 8001
 icecast_password = ""
 icecast_mount = "stream.ogg"
 icecast_genre = "Various"

go.mod

@@ -1,9 +1,21 @@
 module dwelling-radio
 
-go 1.17
+go 1.21
+
+toolchain go1.22.3
+
+require github.com/pkg/errors v0.9.1
+
+require git.arav.su/Arav/httpr v0.3.2
+
+require github.com/a-h/templ v0.2.778
 
 require (
-	github.com/julienschmidt/httprouter v1.3.0
-	github.com/pkg/errors v0.9.1
-	gopkg.in/yaml.v3 v3.0.1
+	github.com/invopop/ctxi18n v0.8.1
+	github.com/mattn/go-sqlite3 v1.14.23
+)
+
+require (
+	github.com/invopop/yaml v0.3.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,7 +1,23 @@
-github.com/julienschmidt/httprouter v1.3.0 h1:U0609e9tgbseu3rBINet9P48AI/D3oJs4dN7jwJOQ1U=
-github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
+git.arav.su/Arav/httpr v0.3.2 h1:a+ifu+9+FnQe6p/Kd4kgTDKAFN6zBOJjBTMjbAuHxVk=
+git.arav.su/Arav/httpr v0.3.2/go.mod h1:z0SVYwe5dBReeVuFU9QH2PmBxICJwchxqY5OfZbeVzU=
+github.com/a-h/templ v0.2.778 h1:VzhOuvWECrwOec4790lcLlZpP4Iptt5Q4K9aFxQmtaM=
+github.com/a-h/templ v0.2.778/go.mod h1:lq48JXoUvuQrU0VThrK31yFwdRjTCnIE5bcPCM9IP1w=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/invopop/ctxi18n v0.8.1 h1:nfy5Mk6UfvLbGRBwpTi4T1g95+rmRo8bMllUmpCvVwI=
+github.com/invopop/ctxi18n v0.8.1/go.mod h1:1Osw+JGYA+anHt0Z4reF36r5FtGHYjGQ+m1X7keIhPc=
+github.com/invopop/yaml v0.3.1 h1:f0+ZpmhfBSS4MhG+4HYseMdJhoeeopbSKbq5Rpeelso=
+github.com/invopop/yaml v0.3.1/go.mod h1:PMOp3nn4/12yEZUFfmOuNHJsZToEEOwoWsT+D81KkeA=
+github.com/mattn/go-sqlite3 v1.14.23 h1:gbShiuAP1W5j9UOksQ06aiiqPMxYecovVGwmTxWtuw0=
+github.com/mattn/go-sqlite3 v1.14.23/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

init/ezstream.service

@@ -0,0 +1,55 @@
+[Unit]
+Description=Arav's dwelling / Radio / EZStream
+Requires=dwelling-radio.service icecast.service
+After=network-online.target dwelling-radio.service icecast.service
+
+[Service]
+Type=simple
+Restart=on-failure
+User=dwelling-radio
+DynamicUser=yes
+ExecStart=/usr/bin/ezstream -c /etc/dwelling/ezstream.xml
+ExecStop=/bin/kill -INT $MAINPID
+ExecReload=/bin/kill -HUP $MAINPID
+
+ReadOnlyPaths=/
+
+LogsDirectory=dwelling-radio
+
+AmbientCapabilities=
+CapabilityBoundingSet=
+
+LockPersonality=true
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateTmp=true
+PrivateUsers=true
+ProcSubset=pid
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHome=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectProc=noaccess
+ProtectSystem=strict
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
+RestrictNamespaces=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+SystemCallArchitectures=native
+SystemCallFilter=~@clock
+SystemCallFilter=~@cpu-emulation
+SystemCallFilter=~@debug
+SystemCallFilter=~@module
+SystemCallFilter=~@mount
+SystemCallFilter=~@obsolete
+SystemCallFilter=~@privileged
+SystemCallFilter=~@raw-io
+SystemCallFilter=~@reboot
+SystemCallFilter=~@swap
+
+[Install]
+WantedBy=multi-user.target

init/liquidsoap.service

@@ -0,0 +1,54 @@
+[Unit]
+Description=Arav's dwelling / Radio / Liquidsoap
+Requires=icecast.service
+After=network-online.target icecast.service
+
+[Service]
+Type=simple
+Restart=on-failure
+User=dwelling-radio
+DynamicUser=yes
+ExecStart=/opt/opam/default/bin/liquidsoap /etc/dwelling/radio.liq
+ExecStop=/bin/kill -INT $MAINPID
+
+ReadOnlyPaths=/
+
+LogsDirectory=dwelling-radio
+
+AmbientCapabilities=
+CapabilityBoundingSet=
+
+LockPersonality=true
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateTmp=true
+PrivateUsers=true
+ProcSubset=pid
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHome=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectProc=noaccess
+ProtectSystem=strict
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
+RestrictNamespaces=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+SystemCallArchitectures=native
+SystemCallFilter=~@clock
+SystemCallFilter=~@cpu-emulation
+SystemCallFilter=~@debug
+SystemCallFilter=~@module
+SystemCallFilter=~@mount
+SystemCallFilter=~@obsolete
+SystemCallFilter=~@privileged
+SystemCallFilter=~@raw-io
+SystemCallFilter=~@reboot
+SystemCallFilter=~@swap
+
+[Install]
+WantedBy=multi-user.target

init/radio.service

@@ -7,9 +7,13 @@ After=network-online.target icecast.service
 Type=simple
 Restart=on-failure
 DynamicUser=yes
-ExecStart=/usr/bin/dwelling-radio -conf /etc/dwelling/radio.yaml
+ExecStart=/usr/bin/dwelling-radio -listen /var/run/dwelling-radio/sock \
+    -work-dir /mnt/data/appdata/radio \
+    -playlist all-rand \
+    -lst-len 10
 
 ReadOnlyPaths=/
+ReadWritePaths=/mnt/data/appdata/radio
 
 LogsDirectory=dwelling-radio
 RuntimeDirectory=dwelling-radio
@@ -21,18 +25,33 @@ LockPersonality=true
 MemoryDenyWriteExecute=true
 NoNewPrivileges=true
 PrivateDevices=true
+PrivateTmp=true
+PrivateUsers=true
+ProcSubset=pid
 ProtectClock=true
 ProtectControlGroups=true
 ProtectHome=true
+ProtectHostname=true
 ProtectKernelLogs=true
 ProtectKernelModules=true
 ProtectKernelTunables=true
+ProtectProc=noaccess
 ProtectSystem=strict
 RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
 RestrictNamespaces=true
 RestrictRealtime=true
 RestrictSUIDSGID=true
 SystemCallArchitectures=native
+SystemCallFilter=~@clock
+SystemCallFilter=~@cpu-emulation
+SystemCallFilter=~@debug
+SystemCallFilter=~@module
+SystemCallFilter=~@mount
+SystemCallFilter=~@obsolete
+SystemCallFilter=~@privileged
+SystemCallFilter=~@raw-io
+SystemCallFilter=~@reboot
+SystemCallFilter=~@swap
 
 [Install]
 WantedBy=multi-user.target

internal/configuration/configuration.go

@@ -1,48 +0,0 @@
-package configuration
-
-import (
-	"os"
-	"strings"
-
-	"github.com/pkg/errors"
-	"gopkg.in/yaml.v3"
-)
-
-type Configuration struct {
-	ListenOn string `yaml:"listen_on"`
-	Icecast  struct {
-		URL      string `yaml:"url"`
-		Playlist string `yaml:"playlist_path"`
-	} `yaml:"icecast"`
-	FilelistPath         string `yaml:"filelist_path"`
-	MostListenedSongPath string `yaml:"most_listened_song_file_path"`
-	Liquidsoap           struct {
-		ExecPath   string `yaml:"executable_path"`
-		ScriptPath string `yaml:"script_path"`
-	} `yaml:"liquidsoap"`
-	ListLastNSongs int `yaml:"list_last_n_songs"`
-}
-
-// Load reads a YAML file that stores configuration of a service.
-func Load(path string) (*Configuration, error) {
-	configFile, err := os.Open(path)
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to open configuration file")
-	}
-	defer configFile.Close()
-
-	config := &Configuration{}
-
-	if err := yaml.NewDecoder(configFile).Decode(config); err != nil {
-		return nil, errors.Wrap(err, "failed to parse configuration file")
-	}
-
-	return config, nil
-}
-
-// SplitNetworkAddress splits ListenOn option into network type (e.g. tcp, unix,
-// udp) and address:port or /path/to/service.socket to listen on.
-func (c *Configuration) SplitNetworkAddress() (string, string) {
-	s := strings.Split(c.ListenOn, " ")
-	return s[0], s[1]
-}

internal/http/dj_handlers.go

@@ -0,0 +1,156 @@
+package http
+
+import (
+	"dwelling-radio/internal/radio"
+	"dwelling-radio/internal/statistics"
+	"dwelling-radio/pkg/oggtag"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type DJHandlers struct {
+	listeners    *radio.ListenerCounter
+	playlist     *radio.Playlist
+	stats        statistics.Statistics
+	curSong      *radio.Song
+	listLen      int64
+	fallbackSong string
+}
+
+func NewDJHandlers(l *radio.ListenerCounter, p *radio.Playlist,
+	stats statistics.Statistics, cs *radio.Song, n int64, fS string) *DJHandlers {
+	return &DJHandlers{listeners: l, playlist: p,
+		stats: stats, curSong: cs, listLen: n, fallbackSong: fS}
+}
+
+func (dj *DJHandlers) ListenersUpdateIcecast(w http.ResponseWriter, r *http.Request) {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Println("DJHandlers.ListenersUpdateIcecast panic:", err)
+		}
+	}()
+
+	if err := r.ParseForm(); err != nil {
+		log.Println("DJHandlers.ListenersUpdateIcecast:", err)
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	switch r.FormValue("action") {
+	case "listener_add":
+		dj.listeners.Lock()
+		_ = dj.listeners.Inc()
+		dj.listeners.Unlock()
+	case "listener_remove":
+		dj.listeners.Lock()
+		defer dj.listeners.Unlock()
+		if _, err := dj.listeners.Dec(); err != nil {
+			log.Println("DJHandlers.ListenersUpdateIcecast:", err)
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+	default:
+		w.WriteHeader(http.StatusNotAcceptable)
+		return
+	}
+
+	w.Header().Add("Content-Type", "text/plain")
+	w.Header().Add("Icecast-Auth-User", "1")
+	w.WriteHeader(http.StatusOK)
+}
+
+const defaultArtistTag = "[LOL, no artist tag]"
+const defaultTitleTag = "[No title tag for you -_-]"
+const defaultTitleTagNoArtist = "[And no title tag either! Pffft]"
+
+func (dj *DJHandlers) PlaylistNext(w http.ResponseWriter, _ *http.Request) {
+	w.Header().Add("Content-Type", "text/plain")
+	dj.playlist.Lock()
+	nxt := dj.playlist.Next()
+	dj.playlist.Unlock()
+	if nxt == "" {
+		log.Println("the end of a playlist has been reached")
+		if nxt = dj.fallbackSong; nxt == "" {
+			log.Println("a fallback song is not set")
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+	}
+
+	oggf, err := oggtag.NewOggFile(nxt)
+	if err != nil {
+		log.Println("cannot read an OGG file", nxt, ":", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	newSong := radio.Song{
+		Artist:   oggf.GetTag("artist"),
+		Title:    oggf.GetTag("title"),
+		Duration: oggf.GetDuration(),
+		// Here 5 seconds are being added because it is approximately the
+		// time between the creation of this Song object and when ezstream
+		// actually starts to play it.
+		StartAt: time.Now()} // .Add(5 * time.Second)
+
+	if newSong.Artist == "" && newSong.Title == "" {
+		log.Println("Playlist:", nxt, "has no artist and title tags.")
+		newSong.Artist = defaultArtistTag
+		newSong.Title = defaultTitleTagNoArtist
+	} else if newSong.Artist == "" {
+		log.Println("Playlist:", nxt, "has no artist tag.")
+		newSong.Artist = defaultArtistTag
+	} else if newSong.Title == "" {
+		log.Println("Playlist:", nxt, "has no title tag.")
+		newSong.Title = defaultTitleTag
+	}
+
+	if strings.HasSuffix(nxt, "/fallback.ogg") {
+		newSong.Artist = "Nothing to play. Playing a fallback: " + newSong.Artist
+	}
+
+	dj.listeners.Lock()
+	dj.curSong.Listeners, dj.curSong.PeakListeners = dj.listeners.Reset()
+	dj.listeners.Unlock()
+
+	if dj.curSong.Artist != "" && !strings.Contains(dj.curSong.Artist, "no artist tag") &&
+		!strings.Contains(dj.curSong.Artist, "No title tag") {
+		if err := dj.stats.Add(dj.curSong); err != nil {
+			log.Println("cannot add a song to a stats DB:", err)
+		}
+	}
+
+	*dj.curSong = newSong
+	dj.curSong.Listeners = 0
+	dj.curSong.PeakListeners = 0
+
+	fmt.Fprintln(w, nxt)
+}
+
+func (dj *DJHandlers) Status(w http.ResponseWriter, r *http.Request) {
+	w.Header().Add("Content-Type", "application/json")
+
+	lst, err := dj.stats.LastNSongs(dj.listLen)
+	if err != nil {
+		log.Println("failed to fetch last n songs:", err)
+	}
+
+	dj.listeners.RLock()
+	defer dj.listeners.RUnlock()
+	err = json.NewEncoder(w).Encode(&struct {
+		Current   *radio.Song  `json:"current_song,omitempty"`
+		Listeners int64        `json:"listeners"`
+		List      []radio.Song `json:"last_songs,omitempty"`
+	}{
+		Current:   dj.curSong,
+		Listeners: dj.listeners.Current(),
+		List:      lst})
+	if err != nil {
+		log.Println("DJHandlers.Status:", err)
+		http.Error(w, "status parsing failed", http.StatusInternalServerError)
+	}
+}

internal/http/handlers.go

@@ -1,111 +0,0 @@
-package http
-
-import (
-	"dwelling-radio/internal/configuration"
-	"dwelling-radio/internal/radio"
-	"dwelling-radio/pkg/utils"
-	"dwelling-radio/web"
-	"encoding/json"
-	"log"
-	"net/http"
-	"os"
-	"time"
-)
-
-const FormatISO8601 = "2006-01-02T15:04:05-0700"
-
-type Handlers struct {
-	conf *configuration.Configuration
-}
-
-func NewHandlers(conf *configuration.Configuration) *Handlers {
-	return &Handlers{conf: conf}
-}
-
-func (h *Handlers) AssetsFS() http.FileSystem {
-	return web.Assets()
-}
-
-func (h *Handlers) Index(w http.ResponseWriter, r *http.Request) {
-	status, err := radio.IcecastGetStatus(h.conf.Icecast.URL)
-	if err != nil {
-		log.Println("failed to get Icecast status:", err)
-	} else {
-		if tim, err := time.Parse(time.RFC1123Z, status.ServerStartDate); err == nil {
-			status.ServerStartDate = utils.ToClientTimezone(tim, r).Format(time.RFC1123)
-		}
-
-		if tim, err := time.Parse(FormatISO8601, status.ServerStartISO8601); err == nil {
-			status.ServerStartISO8601 = utils.ToClientTimezone(tim, r).Format(FormatISO8601)
-		}
-	}
-
-	songs, err := radio.IcecastLastSongs(h.conf.Icecast.Playlist)
-	if err != nil {
-		log.Println("cannot retrieve last songs:", err)
-	} else {
-		for i := 0; i < len(songs); i++ {
-			if tim, err := time.Parse(radio.SongTimeFormat, songs[i].Time); err == nil {
-				songs[i].Time = utils.ToClientTimezone(tim, r).Format("15:04")
-			}
-		}
-	}
-
-	web.Index(utils.MainSite(r.Host), h.conf.ListLastNSongs, status, &songs, r, w)
-}
-
-func (h *Handlers) Status(w http.ResponseWriter, r *http.Request) {
-	status, err := radio.IcecastGetStatus(h.conf.Icecast.URL)
-	if err != nil {
-		log.Println("cannot retrieve Icecast status:", err)
-		http.Error(w, "cannot retrieve Icecast status", http.StatusInternalServerError)
-		return
-	}
-
-	if tim, err := time.Parse(time.RFC1123Z, status.ServerStartDate); err == nil {
-		status.ServerStartDate = utils.ToClientTimezone(tim, r).Format(time.RFC1123)
-	}
-
-	if tim, err := time.Parse(FormatISO8601, status.ServerStartISO8601); err == nil {
-		status.ServerStartISO8601 = utils.ToClientTimezone(tim, r).Format(FormatISO8601)
-	}
-
-	w.Header().Add("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(status)
-}
-
-func (h *Handlers) LastSong(w http.ResponseWriter, r *http.Request) {
-	song, err := radio.IcecastLastSong(h.conf.Icecast.Playlist)
-	if err != nil {
-		log.Println("cannot retrieve last songs:", err)
-	}
-
-	if song == nil {
-		w.WriteHeader(http.StatusNotFound)
-		return
-	}
-
-	if tim, err := time.Parse(radio.SongTimeFormat, song.Time); err == nil {
-		song.Time = utils.ToClientTimezone(tim, r).Format("15:04")
-	}
-
-	w.Header().Add("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(song)
-}
-
-func (h *Handlers) Playlist(w http.ResponseWriter, _ *http.Request) {
-	w.Header().Add("Content-Disposition", "attachment; filename=\"radio.arav.su.m3u\"")
-	fc, _ := web.AssetsGetFile("radio.arav.su.m3u")
-	w.Write(fc)
-}
-
-func (h *Handlers) Filelist(w http.ResponseWriter, _ *http.Request) {
-	w.Header().Add("Content-Type", "text/html")
-	data, _ := os.ReadFile(h.conf.FilelistPath)
-	w.Write(data)
-}
-
-func (h *Handlers) RobotsTxt(w http.ResponseWriter, _ *http.Request) {
-	w.Header().Add("Content-Disposition", "attachment; filename=\"robots.txt\"")
-	w.Write([]byte("User-agent: *\nDisallow: /assets/\nDisallow: /live/"))
-}

internal/http/http.go

@@ -1,76 +0,0 @@
-package http
-
-import (
-	"context"
-	"log"
-	"net"
-	"net/http"
-	"os"
-	"time"
-
-	"github.com/julienschmidt/httprouter"
-)
-
-type HttpServer struct {
-	server *http.Server
-	router *httprouter.Router
-}
-
-func NewHttpServer() *HttpServer {
-	r := httprouter.New()
-	return &HttpServer{
-		server: &http.Server{
-			ReadTimeout:  3 * time.Second,
-			WriteTimeout: 3 * time.Second,
-			Handler:      r,
-		},
-		router: r,
-	}
-}
-
-func (s *HttpServer) GET(path string, handler http.HandlerFunc) {
-	s.router.Handler(http.MethodGet, path, handler)
-}
-
-func (s *HttpServer) ServeStatic(path string, fsys http.FileSystem) {
-	s.router.ServeFiles(path, fsys)
-}
-
-func (s *HttpServer) SetNotFoundHandler(handler http.HandlerFunc) {
-	s.router.NotFound = handler
-}
-
-// GetURLParam wrapper around underlying router for getting URL parameters.
-func GetURLParam(r *http.Request, param string) string {
-	return httprouter.ParamsFromContext(r.Context()).ByName(param)
-}
-
-func (s *HttpServer) Start(network, address string) error {
-	listener, err := net.Listen(network, address)
-	if err != nil {
-		return err
-	}
-
-	if listener.Addr().Network() == "unix" {
-		os.Chmod(address, 0777)
-	}
-
-	go func() {
-		if err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {
-			log.Fatalln(err)
-		}
-	}()
-
-	return nil
-}
-
-func (s *HttpServer) Stop() error {
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-	defer cancel()
-
-	if err := s.server.Shutdown(ctx); err != nil {
-		return err
-	}
-
-	return nil
-}

internal/http/server.go

@@ -0,0 +1,76 @@
+package http
+
+import (
+	"context"
+	"log"
+	"net"
+	"net/http"
+	"net/netip"
+	"os"
+	"strings"
+	"time"
+)
+
+type HttpServer struct {
+	s    http.Server
+	addr net.Addr
+}
+
+func NewHttpServer(r http.Handler) *HttpServer {
+	return &HttpServer{s: http.Server{
+		ReadTimeout:  3 * time.Second,
+		WriteTimeout: 3 * time.Second,
+		Handler:      r}}
+}
+
+func (s *HttpServer) Start(address string) error {
+	var network string
+	if !strings.ContainsRune(address, ':') {
+		network = "unix"
+	} else {
+		ap, err := netip.ParseAddrPort(address)
+		if err != nil {
+			return err
+		}
+
+		if ap.Addr().Is4() {
+			network = "tcp4"
+		} else if ap.Addr().Is6() {
+			network = "tcp6"
+		}
+	}
+
+	listener, err := net.Listen(network, address)
+	if err != nil {
+		return err
+	}
+
+	if listener.Addr().Network() == "unix" {
+		os.Chmod(address, 0777)
+	}
+
+	s.addr = listener.Addr()
+
+	go func() {
+		if err = s.s.Serve(listener); err != nil && err != http.ErrServerClosed {
+			log.Fatalln(err)
+		}
+	}()
+
+	return nil
+}
+
+func (s *HttpServer) Stop() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	if s.addr.Network() == "unix" {
+		defer os.Remove(s.addr.String())
+	}
+
+	if err := s.s.Shutdown(ctx); err != nil {
+		return err
+	}
+
+	return nil
+}

internal/radio/icecast.go

@@ -1,222 +0,0 @@
-package radio
-
-import (
-	"bytes"
-	"dwelling-radio/pkg/watcher"
-	"encoding/json"
-	"io"
-	"net/http"
-	"os"
-	"sync"
-	"syscall"
-	"time"
-
-	"github.com/pkg/errors"
-)
-
-const (
-	IcecastPlaylistDateFormat = "02/Jan/2006:15:04:05 -0700"
-	SongTimeFormat            = "2006 15:04-0700"
-
-	bufferSize = 3072
-)
-
-var (
-	currentlyPlaying     Song
-	lastPlayedCache      []Song
-	lastPlayedCacheMutex sync.Mutex
-)
-
-type IcecastStatusDTO struct {
-	Icestats struct {
-		ServerStartISO8601 string `json:"server_start_iso8601"`
-		ServerStartDate    string `json:"server_start"`
-		Source             struct {
-			Artist       string `json:"artist"`
-			Title        string `json:"title"`
-			ListenerPeak int    `json:"listener_peak"`
-			Listeners    int    `json:"listeners"`
-		} `json:"source"`
-	} `json:"icestats"`
-}
-
-func (is *IcecastStatusDTO) SongName() string {
-	return is.Icestats.Source.Artist + " - " + is.Icestats.Source.Title
-}
-
-type IcecastStatus struct {
-	ServerStartISO8601 string `json:"server_start_iso8601"`
-	ServerStartDate    string `json:"server_start_date"`
-	SongName           string `json:"song"`
-	ListenerPeak       int    `json:"listener_peak"`
-	Listeners          int    `json:"listeners"`
-}
-
-type Song struct {
-	Time      string `json:"time"`
-	Listeners string `json:"listeners"`
-	Song      string `json:"song"`
-}
-
-func IcecastGetStatus(icecastURL string) (*IcecastStatus, error) {
-	resp, err := http.Get(icecastURL)
-	if err != nil {
-		return nil, err
-	}
-
-	iceStatDTO := &IcecastStatusDTO{}
-
-	if err := json.NewDecoder(resp.Body).Decode(iceStatDTO); err != nil {
-		return nil, err
-	}
-
-	return &IcecastStatus{
-		ServerStartISO8601: iceStatDTO.Icestats.ServerStartISO8601,
-		ServerStartDate:    iceStatDTO.Icestats.ServerStartDate,
-		SongName:           iceStatDTO.SongName(),
-		ListenerPeak:       iceStatDTO.Icestats.Source.ListenerPeak,
-		Listeners:          iceStatDTO.Icestats.Source.Listeners,
-	}, nil
-}
-
-func IcecastLastSongs(playlistPath string) ([]Song, error) {
-	lastPlayedCacheMutex.Lock()
-	defer lastPlayedCacheMutex.Unlock()
-	if lpcLen := len(lastPlayedCache); lpcLen > 0 {
-		ret := make([]Song, 0, lpcLen)
-		ret = append(ret, lastPlayedCache...)
-		return ret, nil
-	}
-
-	return nil, nil
-}
-
-func IcecastLastSong(playlistPath string) (*Song, error) {
-	lastPlayedCacheMutex.Lock()
-	defer lastPlayedCacheMutex.Unlock()
-	if lpcLen := len(lastPlayedCache); lpcLen > 0 {
-		return &lastPlayedCache[lpcLen-1], nil
-	}
-	return nil, nil
-}
-
-func icecastLastPlayedSongs(playlistPath string, n int) ([]Song, error) {
-	var buf []byte
-	var offset int64 = 0
-
-	playlist, err := os.Open(playlistPath)
-	if err != nil {
-		return nil, err
-	}
-	defer playlist.Close()
-
-	playlist_stat, _ := playlist.Stat()
-
-	if playlist_stat.Size() == 0 {
-		return nil, nil
-	}
-
-	if playlist_stat.Size() < bufferSize {
-		buf = make([]byte, playlist_stat.Size())
-	} else {
-		buf = make([]byte, bufferSize)
-		offset = playlist_stat.Size() - bufferSize
-	}
-
-	_, err = playlist.ReadAt(buf, offset)
-	if err != nil && err != io.EOF {
-		return nil, err
-	}
-
-	lines := bytes.Split(buf, []byte("\n"))
-
-	if len(lines) < 2 {
-		return nil, nil
-	}
-
-	lines = lines[:len(lines)-1]
-
-	if len(lines) > n {
-		lines = lines[len(lines)-n:]
-	}
-
-	songs := make([]Song, 0, len(lines))
-
-	for _, line := range lines {
-		fields := bytes.Split(line, []byte("|"))
-
-		tim, _ := time.Parse(IcecastPlaylistDateFormat, string(fields[0]))
-
-		songs = append(songs, Song{
-			Time:      tim.Format(SongTimeFormat),
-			Listeners: string(fields[2]),
-			Song:      string(fields[3])})
-	}
-
-	return songs, nil
-}
-
-type PlaylistLogWatcher struct {
-	watcher *watcher.InotifyWatcher
-	changed chan uint32
-}
-
-func NewPlaylistLogWatcher() *PlaylistLogWatcher {
-	return &PlaylistLogWatcher{changed: make(chan uint32)}
-}
-
-func (pw *PlaylistLogWatcher) Watch(playlistPath string, n int) (err error) {
-	if pw.watcher != nil {
-		pw.watcher.Close()
-	}
-
-	pw.watcher, err = watcher.NewInotifyWatcher()
-	if err != nil {
-		return errors.Wrap(err, "cannot instantiate inotify watcher")
-	}
-
-	err = pw.watcher.AddWatch(playlistPath, watcher.ModIgnMask)
-	if err != nil {
-		return errors.Wrap(err, "cannot set a playlist to watch")
-	}
-
-	pw.watcher.WatchForMask(pw.changed, watcher.ModIgnMask)
-
-	lastPlayedCache = make([]Song, 0, n)
-
-	go func() {
-		for {
-			select {
-			case mask := <-pw.changed:
-				if mask&syscall.IN_MODIFY > 0 {
-					lastPlayedCacheMutex.Lock()
-					if songs, err := icecastLastPlayedSongs(playlistPath, 1); err == nil && len(songs) > 0 {
-						CheckAndUpdateMostListenedSong(songs[0], currentlyPlaying)
-						if currentlyPlaying.Time == "" {
-							currentlyPlaying = songs[0]
-						} else {
-							currentlyPlaying.Listeners = songs[0].Listeners
-							if len(lastPlayedCache) == n {
-								lastPlayedCache = append(lastPlayedCache[1:], currentlyPlaying)
-							} else {
-								lastPlayedCache = append(lastPlayedCache, currentlyPlaying)
-							}
-							currentlyPlaying = songs[0]
-						}
-					}
-					lastPlayedCacheMutex.Unlock()
-				} else if mask&syscall.IN_IGNORED > 0 {
-					pw.Close()
-					pw.Watch(playlistPath, n)
-					return
-				}
-			}
-		}
-	}()
-
-	return nil
-}
-
-func (pw *PlaylistLogWatcher) Close() {
-	pw.watcher.Close()
-}

internal/radio/liquidsoap.go

@@ -1,54 +0,0 @@
-package radio
-
-import (
-	"os/exec"
-	"syscall"
-
-	"github.com/pkg/errors"
-)
-
-var ErrLiquidsoapNotRunning = errors.New("liquidsoap is not running")
-
-type Liquidsoap struct {
-	command *exec.Cmd
-}
-
-func NewLiquidsoap(liquidsoapPath, scriptPath string) (*Liquidsoap, error) {
-	if _, err := exec.LookPath(liquidsoapPath); err != nil {
-		return nil, err
-	}
-
-	out, err := exec.Command(liquidsoapPath, "--verbose", "-c", scriptPath).CombinedOutput()
-	if err != nil {
-		return nil, errors.Wrap(err, "script cannot be validated")
-	}
-
-	if len(out) > 0 {
-		return nil, errors.Errorf("script validation failed: %s", string(out))
-	}
-
-	cmd := exec.Command(liquidsoapPath, scriptPath)
-
-	if err := cmd.Start(); err != nil {
-		return nil, err
-	}
-
-	return &Liquidsoap{
-		command: cmd}, nil
-}
-
-func (l *Liquidsoap) Stop() error {
-	if l.command.Process == nil && l.command.ProcessState != nil {
-		return ErrLiquidsoapNotRunning
-	}
-
-	if err := l.command.Process.Signal(syscall.SIGINT); err != nil {
-		return err
-	}
-
-	if err := l.command.Wait(); err != nil {
-		return err
-	}
-
-	return nil
-}

internal/radio/listener_counter.go

@@ -0,0 +1,93 @@
+package radio
+
+import (
+	"encoding/json"
+	"errors"
+	"math"
+	"sync"
+)
+
+// ListenerCounter stores the current, overall and peak numbers of listeners.
+type ListenerCounter struct {
+	sync.RWMutex
+	current, peak     int64
+	overall, cur_peak int64
+}
+
+// NewListenerCounter returns a new ListenerCounter struct instance.
+func NewListenerCounter() *ListenerCounter {
+	return &ListenerCounter{}
+}
+
+// Current returns a number of current listeners.
+func (l *ListenerCounter) Current() int64 {
+	return l.current
+}
+
+// Peak returns a peak number of listeners.
+func (l *ListenerCounter) Peak() int64 {
+	return l.peak
+}
+
+// CurrentPeak returns a peak number of listeners for a currently playing song.
+func (l *ListenerCounter) CurrentPeak() int64 {
+	return l.cur_peak
+}
+
+// Overall returns an overall number of listeners for a currently playing song.
+func (l *ListenerCounter) Overall() int64 {
+	return l.overall
+}
+
+// Inc increments by 1 a current number of listeners and updates a peak number.
+func (l *ListenerCounter) Inc() int64 {
+	if l.current == math.MaxInt64 {
+		// We panic here because if this will ever happen, then something's going certainly wrong.
+		panic("a current number of listeners exceeded MaxInt64")
+	}
+	l.current++
+	if l.current > l.peak {
+		l.peak = l.current
+	}
+	if l.current > l.cur_peak {
+		l.cur_peak = l.current
+	}
+	if l.overall == math.MaxInt64 {
+		panic("an overall number of listeners exceeded MaxInt64")
+	}
+	l.overall++
+	return l.current
+}
+
+// Dec decrements by 1 a current number of listeners. An error will occur if
+// a resulting number is less than 0.
+func (l *ListenerCounter) Dec() (int64, error) {
+	if l.current == 0 {
+		return l.current, errors.New("an attempt to decrement a number of current listeners down to less than 0")
+	}
+	l.current--
+	return l.current, nil
+}
+
+// Reset current peak and overall listeners for a song that is playing.
+// And return its values.
+func (l *ListenerCounter) Reset() (overall, peak int64) {
+	peak = l.cur_peak
+	l.cur_peak = l.current
+	overall = l.overall
+	l.overall = l.current
+	return
+}
+
+func (l *ListenerCounter) MarshalJSON() ([]byte, error) {
+	return json.Marshal(&struct {
+		Current int64 `json:"current"`
+		Peak    int64 `json:"peak"`
+		Overall int64 `json:"overall"`
+		CurPeak int64 `json:"current_peak"`
+	}{
+		Current: l.current,
+		Peak:    l.peak,
+		Overall: l.overall,
+		CurPeak: l.cur_peak})
+}

internal/radio/mostlistened.go

@@ -1,81 +0,0 @@
-package radio
-
-import (
-	"bytes"
-	"errors"
-	"strconv"
-	"time"
-)
-
-const MostListenedDateFormat = "02 January 2006"
-
-type MostListenedSong struct {
-	Listeners int
-	Date      time.Time
-	Song      string
-}
-
-func (mls *MostListenedSong) DateString() string {
-	return mls.Date.Format(MostListenedDateFormat)
-}
-
-var mostListened MostListenedSong
-
-// CheckAndUpdateMostListenedSong compares current most played song with
-// provided `cur`rent song's listeners, and if it is larger, then it takes
-// `prev`ious song's name.
-//
-// Why we take a previous song's name? Experimentally I noticed that Icecast
-// writes amount of listeners that was by the very start of a next song. So
-// it means that it was actually amount of listeners by the end of
-// the previous song.
-//
-// So it would be fairer to give these listeners back to a song they was
-// listening to.
-func CheckAndUpdateMostListenedSong(cur, prev Song) {
-	if prev.Song == "" {
-		return
-	}
-	l, _ := strconv.Atoi(cur.Listeners)
-	if l > mostListened.Listeners {
-		mostListened = MostListenedSong{
-			Listeners: l,
-			Date:      time.Now().UTC(),
-			Song:      prev.Song}
-	}
-}
-
-// MostListened returns song that currently is the song with most simultaneous
-// listeners.
-func MostListened() *MostListenedSong {
-	return &mostListened
-}
-
-func LoadMostListenedSong(data []byte) (err error) {
-	lines := bytes.Split(data, []byte{'\n'})
-	if len(lines) != 3 {
-		return errors.New("lines count mismatch, should be 3")
-	}
-	mostListened = MostListenedSong{}
-	if mostListened.Date, err = time.Parse(time.RFC3339, string(lines[0])); err != nil {
-		return err
-	}
-	if mostListened.Listeners, err = strconv.Atoi(string(lines[1])); err != nil {
-		return err
-	}
-	mostListened.Song = string(lines[2])
-	return nil
-}
-
-func StoreMostListenedSong() []byte {
-	buf := make([]byte, 0, 30+len(mostListened.Song))
-	b := bytes.NewBuffer(buf)
-
-	b.WriteString(mostListened.Date.Format(time.RFC3339))
-	b.WriteByte('\n')
-	b.WriteString(strconv.Itoa(mostListened.Listeners))
-	b.WriteByte('\n')
-	b.WriteString(mostListened.Song)
-
-	return b.Bytes()
-}

internal/radio/playlist.go

@@ -0,0 +1,64 @@
+package radio
+
+import (
+	"os"
+	"strings"
+	"sync"
+
+	"github.com/pkg/errors"
+)
+
+// Playlist holds a list of paths to a song files.
+type Playlist struct {
+	sync.Mutex
+	filePath string
+	playlist []string
+	cur      int
+	repeat   bool
+}
+
+// NewPlaylist returns an instance of a Playlist struct with a loaded playlist.
+// Returns an error if failed to load a playlist file.
+func NewPlaylist(filePath string, repeat bool) (*Playlist, error) {
+	p := &Playlist{filePath: filePath, repeat: repeat}
+	return p, p.load()
+}
+
+// Next returns the next song to play. Returns an empty string if repeat is
+// false and the end of a playlist was reached.
+func (p *Playlist) Next() (song string) {
+	if p.cur == len(p.playlist) {
+		// If the end of a playlist was reached and repeat is set to true,
+		// then go back to the head of it, thus repeating it. Return an empty
+		// string otherwise.
+		if p.repeat {
+			p.cur = 0
+		} else {
+			return ""
+		}
+	}
+	song = p.playlist[p.cur]
+	p.cur++
+	return
+}
+
+// Load reads a playlist file.
+func (p *Playlist) load() error {
+	data, err := os.ReadFile(p.filePath)
+	if err != nil {
+		return errors.Wrap(err, "cannot open a playlist file")
+	}
+
+	if len(data) == 0 {
+		return errors.New("a playlist file is empty. Did not update")
+	}
+
+	p.playlist = strings.Split(string(data), "\n")
+	p.cur = 0
+
+	return nil
+}
+
+func (p *Playlist) Reload() error {
+	return p.load()
+}

internal/radio/song.go

@@ -0,0 +1,40 @@
+package radio
+
+import (
+	"encoding/json"
+	"time"
+)
+
+type Song struct {
+	Artist        string
+	Title         string
+	StartAt       time.Time
+	Duration      time.Duration
+	Listeners     int64
+	PeakListeners int64
+}
+
+// DurationString returns song's duration as a string formatted as [H:]M:SS.
+func (s *Song) DurationString() string {
+	if s.Duration.Hours() >= 1 {
+		return time.UnixMilli(s.Duration.Milliseconds()).Format("3:4:05")
+	}
+	return time.UnixMilli(s.Duration.Milliseconds()).Format("4:05")
+}
+
+func (s *Song) MarshalJSON() ([]byte, error) {
+	return json.Marshal(&struct {
+		Artist        string `json:"artist"`
+		Title         string `json:"title"`
+		DurationMill  int64  `json:"duration_msec,omitempty"`
+		Listeners     int64  `json:"listeners,omitempty"`
+		PeakListeners int64  `json:"peak_listeners,omitempty"`
+		StartAt       string `json:"start_at"`
+	}{
+		Artist:        s.Artist,
+		Title:         s.Title,
+		DurationMill:  s.Duration.Milliseconds(),
+		Listeners:     s.Listeners,
+		PeakListeners: s.PeakListeners,
+		StartAt:       s.StartAt.UTC().Format(time.RFC3339)})
+}

internal/statistics/db/sqlite/db.go

@@ -0,0 +1,90 @@
+package sqlite
+
+import (
+	"database/sql"
+	"dwelling-radio/internal/statistics"
+	_ "embed"
+	"fmt"
+
+	_ "github.com/mattn/go-sqlite3"
+	"github.com/pkg/errors"
+)
+
+const dbDateFormat = "2006-01-02 15:04:05.999"
+
+var (
+	//go:embed queries/schema.sql
+	querySchema string
+
+	//go:embed queries/song_add.sql
+	querySongAdd string
+
+	//go:embed queries/history_add.sql
+	queryHistoryAdd string
+
+	//go:embed queries/last_n_songs.sql
+	queryLastNSongs string
+	//go:embed queries/most_popular_songs.sql
+	queryMostPopularSongs string
+	//go:embed queries/most_simultaneous_listeners.sql
+	queryMostSimultaneousListeners string
+)
+
+type SQLiteStatistics struct {
+	statistics.BaseStatistics
+}
+
+func New(path string) (statistics.Statistics, error) {
+	db, err := sql.Open("sqlite3", fmt.Sprintf("file:%s?_journal=WAL&_mutex=full", path))
+	if err != nil {
+		return nil, err
+	}
+
+	stats := &SQLiteStatistics{
+		BaseStatistics: statistics.BaseStatistics{
+			Db: db, DbDateFormat: dbDateFormat}}
+
+	db.Exec("PRAGMA foreign_keys = ON;")
+
+	_, err = db.Exec(querySchema)
+	if err != nil {
+		return nil, errors.Wrap(err,
+			statistics.ErrPrepareStmt{Name: "initial schema"}.Error())
+	}
+
+	stats.BaseStatistics.StmtSongAdd, err = db.Prepare(querySongAdd)
+	if err != nil {
+		return nil, errors.Wrap(err,
+			statistics.ErrPrepareStmt{Name: "song_add"}.Error())
+	}
+
+	stats.BaseStatistics.StmtHistoryAdd, err = db.Prepare(queryHistoryAdd)
+	if err != nil {
+		return nil, errors.Wrap(err,
+			statistics.ErrPrepareStmt{Name: "history_add"}.Error())
+	}
+
+	stats.BaseStatistics.StmtLastNSongs, err = db.Prepare(queryLastNSongs)
+	if err != nil {
+		return nil, errors.Wrap(err,
+			statistics.ErrPrepareStmt{Name: "last N songs"}.Error())
+	}
+
+	stats.BaseStatistics.StmtMostPopularSongs, err = db.Prepare(queryMostPopularSongs)
+	if err != nil {
+		return nil, errors.Wrap(err,
+			statistics.ErrPrepareStmt{Name: "most popular song"}.Error())
+	}
+
+	stats.BaseStatistics.StmtMostSimultaneousListeners, err = db.Prepare(queryMostSimultaneousListeners)
+	if err != nil {
+		return nil, errors.Wrap(err,
+			statistics.ErrPrepareStmt{Name: "most simultaneous listeners"}.Error())
+	}
+
+	return stats, nil
+}
+
+func (s *SQLiteStatistics) Close() error {
+	return s.BaseStatistics.Close()
+}

internal/statistics/db/sqlite/queries/history_add.sql

@@ -0,0 +1,3 @@
+INSERT OR IGNORE INTO `history`
+    (`start_at`, `song_id`, `listeners`, `peak_listeners`)
+VALUES (?,?,?,?);

internal/statistics/db/sqlite/queries/last_n_songs.sql

@@ -0,0 +1,19 @@
+SELECT
+    `start_at`,
+    `artist`,
+    `title`,
+    `listeners`,
+    `peak_listeners`
+FROM
+    (SELECT
+        `start_at`,
+        `artist`,
+        `title`,
+        `listeners`,
+        `peak_listeners`
+       FROM `history`
+     LEFT JOIN `song`
+            ON `song`.`song_id` = `history`.`song_id`
+     ORDER BY `start_at` DESC
+     LIMIT ? )
+ORDER BY `start_at` ASC;

internal/statistics/db/sqlite/queries/most_popular_songs.sql

@@ -0,0 +1,10 @@
+SELECT
+    `artist`,
+    `title`,
+    SUM(`listeners`) AS `most_listeners`
+FROM `history`
+LEFT JOIN `song`
+     ON `song`.`song_id` = `history`.`song_id`
+GROUP BY `song`.`song_id`
+ORDER BY `most_listeners` DESC
+LIMIT ?;

internal/statistics/db/sqlite/queries/most_simultaneous_listeners.sql

@@ -0,0 +1,8 @@
+SELECT
+    MAX(`start_at`) AS `start_at`,
+    `artist`,
+    `title`,
+    MAX(`peak_listeners`) AS `peak_listeners`
+FROM `history`
+LEFT JOIN `song`
+     ON `song`.`song_id` = `history`.`song_id`;

internal/statistics/db/sqlite/queries/schema.sql

@@ -0,0 +1,15 @@
+CREATE TABLE IF NOT EXISTS `song` (
+    `song_id` INTEGER NOT NULL,
+    `artist`  TEXT    NOT NULL,
+    `title`   TEXT    NOT NULL,
+    PRIMARY KEY (`song_id` AUTOINCREMENT),
+    UNIQUE (`artist`, `title`) );
+
+CREATE TABLE IF NOT EXISTS `history` (
+    `start_at`       TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now')),
+    `song_id`        INTEGER NOT NULL,
+    `listeners`      INTEGER NOT NULL,
+    `peak_listeners` INTEGER NOT NULL,
+    PRIMARY KEY (`start_at`),
+    FOREIGN KEY (`song_id`) REFERENCES `song` (`song_id`)
+             ON UPDATE CASCADE ON DELETE CASCADE );

internal/statistics/db/sqlite/queries/song_add.sql

@@ -0,0 +1,6 @@
+INSERT INTO `song`
+    (`artist`, `title`)
+VALUES (?, ?)
+    ON CONFLICT DO
+       UPDATE SET `song_id`=`song_id`
+RETURNING `song_id`;

internal/statistics/statistics.go

@@ -0,0 +1,138 @@
+package statistics
+
+import (
+	"database/sql"
+	"dwelling-radio/internal/radio"
+	"fmt"
+	"time"
+
+	"github.com/pkg/errors"
+)
+
+const MostListenedDateFormat string = "02 January 2006 at 15:04:05 MST"
+
+type Statistics interface {
+	Add(*radio.Song) error
+	LastNSongs(n int64) ([]radio.Song, error)
+	MostNPopularSongs(n int64) ([]radio.Song, error)
+	MostSimultaneousListeners() (radio.Song, error)
+	Close() error
+}
+
+type ErrPrepareStmt struct {
+	Name string
+}
+
+func (e ErrPrepareStmt) Error() string {
+	return fmt.Sprintf("failed to prepare an SQL statement '%s'", e.Name)
+}
+
+var ErrNoSong = errors.New("no song was passed (a struct is nil or empty)")
+var ErrSongNotAdded = errors.New("song was not added")
+
+type BaseStatistics struct {
+	Db           *sql.DB
+	DbDateFormat string
+
+	StmtHistoryAdd *sql.Stmt
+	StmtSongAdd    *sql.Stmt
+
+	StmtLastNSongs                *sql.Stmt
+	StmtMostPopularSongs          *sql.Stmt
+	StmtMostSimultaneousListeners *sql.Stmt
+}
+
+func (s *BaseStatistics) Add(song *radio.Song) error {
+	if song == nil || song.Artist == "" || song.Title == "" {
+		return ErrNoSong
+	}
+
+	tx, err := s.Db.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	row := tx.Stmt(s.StmtSongAdd).QueryRow(song.Artist, song.Title)
+	if row.Err() != nil {
+		return row.Err()
+	}
+
+	var songID int64
+	if err := row.Scan(&songID); err != nil {
+		return err
+	}
+
+	_, err = tx.Stmt(s.StmtHistoryAdd).Exec(song.StartAt.UTC().Format(s.DbDateFormat),
+		songID, song.Listeners, song.PeakListeners)
+	if err != nil {
+		return errors.Wrap(err, ErrSongNotAdded.Error())
+	}
+
+	tx.Commit()
+
+	return nil
+}
+
+func (s *BaseStatistics) LastNSongs(n int64) ([]radio.Song, error) {
+	if n == 0 {
+		return nil, nil
+	}
+
+	tx, err := s.Db.Begin()
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	rows, err := tx.Stmt(s.StmtLastNSongs).Query(n)
+	if err != nil {
+		return nil, err
+	}
+
+	songs := make([]radio.Song, n)
+
+	i := 0
+	for rows.Next() {
+		var startAt string
+
+		if err := rows.Scan(&startAt, &songs[i].Artist, &songs[i].Title,
+			&songs[i].Listeners, &songs[i].PeakListeners); err != nil {
+			return nil, err
+		}
+
+		songs[i].StartAt, err = time.Parse(s.DbDateFormat, startAt)
+		if err != nil {
+			return nil, err
+		}
+
+		i++
+	}
+
+	tx.Commit()
+
+	if i == 0 {
+		return nil, nil
+	}
+
+	lst := make([]radio.Song, i)
+	copy(lst, songs[:])
+
+	return lst, nil
+}
+
+func (s *BaseStatistics) MostNPopularSongs(n int64) ([]radio.Song, error) {
+	if n == 0 {
+		return nil, nil
+	}
+
+	return nil, nil
+}
+
+func (s *BaseStatistics) MostSimultaneousListeners() (radio.Song, error) {
+	return radio.Song{}, nil
+}
+
+func (s *BaseStatistics) Close() error {
+	return s.Db.Close()
+}

pkg/oggtag/oggtag.go

@@ -0,0 +1,106 @@
+package oggtag
+
+/* oggtag is a naive implementation of OGG tag's reader that is just looking
+for certain tag names ending with an = character, e.g. artist= and title=.
+*/
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"strings"
+	"time"
+)
+
+const (
+	bufferLength = 6144
+	OggS         = "OggS"
+	OggSLen      = len(OggS)
+	Vorbis       = "vorbis"
+	VorbisLen    = len(Vorbis)
+)
+
+// OggFile holds a head of a file and a tail part conatining last granule.
+type OggFile struct {
+	bufHead, bufLast []byte
+}
+
+// NewOggFile reads a file and returns a new OggFile.
+func NewOggFile(path string) (*OggFile, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	of := &OggFile{}
+
+	of.bufHead = make([]byte, bufferLength)
+
+	if _, err := f.Read(of.bufHead); err != nil {
+		return nil, err
+	}
+
+	of.bufLast = make([]byte, bufferLength)
+
+	if _, err := f.Seek(-bufferLength, io.SeekEnd); err != nil {
+		return nil, err
+	}
+
+	fst, err := f.Stat()
+	if err != nil {
+		return nil, err
+	}
+
+	for offset := int64(bufferLength); offset <= fst.Size(); offset += bufferLength {
+		if _, err := f.Seek(-offset, io.SeekEnd); err != nil {
+			return nil, err
+		}
+
+		if _, err := f.Read(of.bufLast); err != nil {
+			return nil, err
+		}
+
+		if bytes.Contains(of.bufLast, []byte(OggS)) {
+			break
+		}
+	}
+
+	return of, nil
+}
+
+// GetTag is searching for a certain tag and returns its value or an empty string.
+func (of *OggFile) GetTag(tag string) string {
+	tagIdx := bytes.Index(of.bufHead, append([]byte{0, 0, 0}, (tag+"=")...))
+	if tagIdx == -1 {
+		if tagIdx = bytes.Index(of.bufHead, append([]byte{0, 0, 0}, (strings.ToUpper(tag)+"=")...)); tagIdx == -1 {
+			if tagIdx = bytes.Index(of.bufHead, append([]byte{0, 0, 0}, (strings.Title(tag)+"=")...)); tagIdx == -1 {
+				return ""
+			}
+		}
+	}
+	tagIdx += 3
+	tagNameLen := len(tag) + 1
+	valStart := tagIdx + tagNameLen
+	valLen := int(of.bufHead[tagIdx-4]) - tagNameLen
+	return string(of.bufHead[valStart : valStart+valLen])
+}
+
+// GetDuration returns song's duration in milliseconds.
+func (of *OggFile) GetDuration() time.Duration {
+	rateIdx := bytes.Index(of.bufHead, []byte(Vorbis)) +
+		VorbisLen + 5
+	rateBytes := of.bufHead[rateIdx : rateIdx+4]
+	rate := int32(rateBytes[0]) + int32(rateBytes[1])<<8 +
+		int32(rateBytes[2])<<16 + int32(rateBytes[3])<<24
+
+	granuleIdx := bytes.LastIndex(of.bufLast, []byte(OggS)) +
+		OggSLen + 2
+	granuleBytes := of.bufLast[granuleIdx : granuleIdx+8]
+	granule := int64(granuleBytes[0]) + int64(granuleBytes[1])<<8 +
+		int64(granuleBytes[2])<<16 + int64(granuleBytes[3])<<24 +
+		int64(granuleBytes[4])<<32 + int64(granuleBytes[5])<<40 +
+		int64(granuleBytes[6])<<48 + int64(granuleBytes[7])<<56
+
+	return time.Duration(granule*1000/int64(rate)) * time.Millisecond
+}

pkg/oggtag/oggtag_test.go

@@ -0,0 +1,57 @@
+package oggtag
+
+import (
+	"testing"
+	"time"
+)
+
+const sampleSong = "/mnt/data/appdata/radio/fallback.ogg"
+const sampleArtist = "breskina"
+const sampleTitle = "Песня про мечты"
+
+func TestGetTag(t *testing.T) {
+	oggf, err := NewOggFile(sampleSong)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	tag := oggf.GetTag("artist")
+	if tag != sampleArtist {
+		t.Error(tag, "!=", sampleArtist)
+	}
+	tag = oggf.GetTag("title")
+	if tag != sampleTitle {
+		t.Error(tag, "!=", sampleTitle)
+	}
+}
+
+func BenchmarkGetTag(b *testing.B) {
+	oggf, err := NewOggFile(sampleSong)
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		oggf.GetTag("artist")
+	}
+}
+
+func BenchmarkGetDuration(b *testing.B) {
+	oggf, err := NewOggFile(sampleSong)
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		oggf.GetDuration()
+	}
+}
+
+func TestGetDuration(t *testing.T) {
+	oggf, err := NewOggFile(sampleSong)
+	if err != nil {
+		t.Fatal(err)
+	}
+	dur := oggf.GetDuration()
+	t.Log(dur, ((dur)/time.Second)*time.Second, dur.Milliseconds())
+}

pkg/utils/dwelling.go

@@ -19,6 +19,13 @@ func MainSite(host string) string {
 	return "https://arav.su"
 }
 
+func Site(host string) string {
+	if strings.Contains(host, ".su") {
+		return "https://radio.arav.su"
+	}
+	return "http://" + host
+}
+
 // ToClientTimezone converts given time to timezone set in a
 // X-Client-Timezone header. If this header is not set, then
 // converts to UTC.

pkg/watcher/linux.go

@@ -1,85 +0,0 @@
-package watcher
-
-import (
-	"syscall"
-	"unsafe"
-
-	"github.com/pkg/errors"
-)
-
-const (
-	CrDelMask  uint32 = syscall.IN_CREATE | syscall.IN_DELETE
-	ModIgnMask uint32 = syscall.IN_MODIFY | syscall.IN_IGNORED
-)
-
-const inotifyCount = 16
-
-type InotifyWatcher struct {
-	fd     int
-	wds    []int
-	closed bool
-}
-
-func NewInotifyWatcher() (w *InotifyWatcher, err error) {
-	w = &InotifyWatcher{closed: false}
-
-	w.fd, err = syscall.InotifyInit()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to initialise inotify watcher")
-	}
-
-	w.wds = make([]int, 0)
-
-	return w, nil
-}
-
-func (w *InotifyWatcher) AddWatch(path string, mask uint32) error {
-	wd, err := syscall.InotifyAddWatch(w.fd, path, mask)
-	if err != nil {
-		return errors.Wrapf(err, "failed to set %s on watch", path)
-	}
-
-	w.wds = append(w.wds, wd)
-
-	return nil
-}
-
-// WatchForMask checking for events from mask and returns inotify mask to channel.
-func (w *InotifyWatcher) WatchForMask(fired chan uint32, mask uint32) {
-	go func() {
-		for !w.closed {
-			buffer := make([]byte, syscall.SizeofInotifyEvent*inotifyCount)
-			n, err := syscall.Read(w.fd, buffer)
-			if err != nil {
-				break
-			}
-
-			if n < syscall.SizeofInotifyEvent {
-				continue
-			}
-
-			for offset := 0; offset < len(buffer); offset += syscall.SizeofInotifyEvent {
-				event := (*syscall.InotifyEvent)(unsafe.Pointer(&buffer[offset]))
-				if event.Mask&mask > 0 {
-					fired <- event.Mask
-				}
-			}
-		}
-	}()
-}
-
-func (w *InotifyWatcher) Close() error {
-	for _, wd := range w.wds {
-		if _, err := syscall.InotifyRmWatch(w.fd, uint32(wd)); err != nil {
-			return err
-		}
-	}
-
-	if err := syscall.Close(w.fd); err != nil {
-		return err
-	}
-
-	w.closed = true
-
-	return nil
-}

tools/radio-fetch

@@ -0,0 +1,9 @@
+#!/usr/bin/env sh
+
+outp="$(curl -XGET --unix-socket /var/run/dwelling-radio/sock http://localhost/api/playlist -s -w '%{response_code}')"
+
+if [ "${outp: -3}" != "200" ]; then
+    exit 1;
+fi
+
+echo ${outp%????}

tools/radioctl

@@ -1,17 +1,22 @@
 #!/usr/bin/sh
 
-radio_dir=/srv/radio
+radio_dir=/mnt/data/appdata/radio
 
 case $1 in
     f | filelist)
-        tree -H '' -T "Arav's dwelling / Radio / List" \
+        tree -H '' -T "List – Arav's dwelling / Radio" \
             -P '*.ogg' --charset=utf-8 --prune --du -hnl \
             --nolinks -o $radio_dir/filelist.html $radio_dir/music
         break
         ;;
     p | playlist)
         find -L $radio_dir/music/* -type f -iname '*.ogg' |
-            cut -c 18- | sort -d > $radio_dir/playlists/all
+            cut -c 31- | sort -d > $radio_dir/playlists/all
+        break
+        ;;
+    ep | ez-playlist)
+        find -L $radio_dir/music/* -type f -iname '*.ogg' |
+            sort -d > $radio_dir/playlists/all
         break
         ;;
     s | shuffle)
@@ -23,18 +28,39 @@ case $1 in
             if [[ "$file" == *.ogg ]]; then
                 continue;
             fi
+            if [ -f "${file%.*}.ogg" ]; then
+                continue;
+            fi
             ffmpeg -hide_banner -i "$file" -y -vn -c:a libvorbis -b:a 128k "${file%.*}.ogg";
-            if [ $? -eq 0 ] && [ $2 = "del" ]; then
+            if [ $? -eq 0 ] && [ $3 = "del" ]; then
                 rm "$file";
             fi
         done
         break
         ;;
+    d | duration)
+        find $radio_dir/music -iname '*.ogg' -exec ffprobe -i "{}" \
+            -show_entries format=duration -v quiet -of csv="p=0" \; |
+            paste -s -d+ - | bc
+        break
+        ;;
+    er | ez-reload)
+        pkill -HUP ezstream
+        break
+        ;;
+    dr | dw-reload)
+        pkill -HUP dwelling-radio
+        break
+        ;;
     *)
         echo "f|ilelist - to generate a filelist.html"
         echo "p|laylist - to generate a playlist 'all'"
+        echo "ep|ez-playlist- - to generate a playlist 'all' with full paths"
         echo "s|huffle - to shuffle a playlist and store as all-rand"
         echo "c|onvert DIR - convert all files in DIR to ogg"
+        echo "d|uration - get total songs' duration"
+        echo "er|ez-reload - send SIGHUP to ezstream to reload a playlist"
+        echo "dr|dw-reload - send SIGHUP to dwelling-radio to reload a playlist"
         exit
         ;;
 esac

web/assets/css/main.css

@@ -11,6 +11,7 @@
 	--secondary-color: #9f2b68;
 	--text-color: #f5f5f5; 
 	--text-indent: 1.6rem;
+	color-scheme: light dark;
 	scrollbar-color: var(--primary-color) var(--background-color); }
 
 @media (prefers-color-scheme: light) {
@@ -26,15 +27,16 @@
 	background-color: var(--secondary-color);
 	color: var(--background-color); }
 
-.right { text-align: right; }
+.small { font-size: .8rem; }
+
+.small.player-links a { margin: 0 .2rem; }
 
 a,
 button {
 	color: var(--primary-color);
 	text-decoration: none; }
 
-a:hover,
-button:hover {
+a:hover {
 	color: var(--secondary-color);
 	cursor: pointer;
 	text-decoration: underline dotted;
@@ -42,9 +44,7 @@ button:hover {
 
 button {
 	background: none;
-	border: none;
-	font: inherit;
-	padding: 0; }
+	border: none; }
 
 p {
 	text-align: justify;
@@ -64,24 +64,10 @@ h2 {
 	font-size: 1.4rem;
 	margin: 1rem 0; }
 
-small { font-size: .8rem; }
-
-small.player-links a { margin: 0 .2rem; }
-
 audio {
 	background-color: var(--primary-color);
-	box-shadow: 5px 5px var(--primary-color);
 	width: 100%; }
 
-@media screen and (-webkit-min-device-pixel-ratio:0) {
-	audio::-webkit-media-controls-panel {
-		background-color: var(--secondary-color); }
-
-	audio { border-radius: 1.6rem; } }
-
-@-moz-document url-prefix() {
-	audio { border-radius: 0; } }
-
 html { margin-left: calc(100vw - 100%); }
 
 body {
@@ -98,44 +84,73 @@ header {
 	flex-wrap: wrap;
 	justify-content: space-between; }
 
-#logo {
-	display: block;
-	width: 360px; }
+header svg text { fill: var(--text-color); }
 
-#logo text { fill: var(--text-color); }
-
-#logo .logo {
-	font-size: 2rem;
+header svg text:first-child {
+	font-size: 3.55rem;
 	font-variant-caps: small-caps;
 	font-weight: bold; }
 
-@media screen and (-webkit-min-device-pixel-ratio:0) {
-	#logo .logo { font-size: 2.082rem; } }
+header svg text:last-child { font-size: 1.5rem; }
 
-@-moz-document url-prefix() {
-	#logo .logo { font-size: 2rem; } }
+@supports (-moz-appearance:none) {
+	header svg text:last-child { transform: scale(.993, 1); } }
 
-#logo .under { font-size: .88rem; }
+header nav {
+	display: flex;
+	flex-direction: column;
+	font-variant: small-caps;
+	justify-content: space-evenly; }
 
-nav { margin-top: .5rem; }
-
-nav a { font-variant: small-caps; }
-
-nav h1 {
+header nav h1 {
 	color: var(--secondary-color);
 	margin: 0; }
 
 section { margin-top: 1rem; }
 
-#last-played {
+#banner { text-align: center; }
+
+#player {
+	flex-direction: row;
+	align-items: center; }
+
+#player p { text-indent: 1rem; }
+
+#player img,
+button#radio-play {
+	filter: drop-shadow(0px 0px 4px var(--text-color));
+	height: 1rem;
+	padding: 0 .7rem; }
+
+button#radio-play {
+	background-image: url(/assets/img/play.svg);
+	height: 3rem;
+	min-width: 3rem;
+	width: 3rem; }
+
+input#radio-volume {
+	accent-color: var(--primary-color);
+	direction: rtl;
+	height: 4rem;
+	margin-left: .5rem;
+	writing-mode: vertical-lr; }
+
+#player div:first-child {
+	display: none;
+	flex-direction: row;
+	align-items: center; }
+
+#last-songs {
 	margin: 0 auto;
 	min-width: 80%;
 	width: 80%; }
 
-#last-played tbody tr {
+#last-songs :is(thead tr, tbody tr) {
 	display: grid;
 	gap: .5rem;
-	grid-template-columns: 3rem 2rem 1fr; }
+	grid-template-columns: 3rem 3rem 1fr; }
+
+#last-songs thead tr { font-weight: bold; }
 
 footer {
 	font-size: .8rem;
@@ -143,12 +158,10 @@ footer {
 	padding: 1rem 0; }
 
 @media screen and (max-width: 640px) {
-	header { display: block; }
+	header {
+		align-items: center;
+		flex-direction: column; }
 
-	#logo {
-		margin: 0 auto;
-		width: 100%; }
+	header svg { width: 100%; }
 
-	nav {
-		width: 100%;
-		text-align: center; } }
+	#player { flex-direction: column; } }

web/assets/img/duration.svg

@@ -0,0 +1 @@
+<svg version="1.1" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><circle cx="256" cy="272" r="221.19" fill="#9f2b68" stroke="#000" stroke-width="37.61"/><circle cx="259.01" cy="253.47" r="1.4062"/><path d="m332.82 405.5-72.697-150.72-84.181-65.471" fill="none" stroke="#000" stroke-width="30"/><circle cx="258.25" cy="47.49" r="1.4062"/><g fill="none" stroke="#000" stroke-width="30"><path d="m259.16 95.203-.17231-52.493"/><path d="m255.26 500.7-.17231-52.493"/><path d="m26.75 272.09 52.493-.17232"/><path d="m432.21 272.09 52.493-.17232"/></g></svg>

web/assets/img/favicon.svg

@@ -1,2 +1 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <svg version="1.1" viewBox="0 0 574.17 258.67" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><g fill="#cd2682" aria-label="A'sD"><path d="m131.67 206.33h-66.833l-13 49.667h-51.833l75.833-242.67h44.833l76.333 242.67h-52.333zm-56.167-40.833h45.333l-22.667-86.5z" style="font-variant-caps:small-caps"/><path d="m226 24.667-4.8333 67.5h-30.667v-92.167h35.5z" style="font-variant-caps:small-caps"/><path d="m338.5 203.83q0-9.5-5.6667-15.333-5.5-5.8333-20.833-10.667-34.167-9.3333-47.333-22.833-13.167-13.667-13.167-38.5 0-25 17.667-41.167 17.667-16.167 45.833-16.167 31.5 0 50.167 16.5 18.833 16.333 18.833 44.167h-47q0-11-6-17.833-5.8333-6.8333-15.833-6.8333-8.8333 0-13.833 5.5-5 5.5-5 14 0 8 5.5 13.167 5.6667 5.1667 20.167 10.333 32.667 8.3333 47 23.167t14.333 41-17.333 41.333q-17.333 15-48 15-14.667 0-28.5-4.3333-13.667-4.3333-23.5-13-20-17.333-20-47.333h47.333q0 16.167 6 22.667 6 6.3333 21.167 6.3333 18 0 18-19.167z" style="font-variant-caps:small-caps"/><path d="m416.5 256v-242.67h64.167q42.5 0 67.667 27 25.333 27 25.833 74v39.333q0 47.833-25.333 75.167-25.167 27.167-69.5 27.167zm49-201.83v161.17h14.667q24.5 0 34.5-12.833 10-13 10.5-44.667v-42.167q0-34-9.5-47.333-9.5-13.5-32.333-14.167z" style="font-variant-caps:small-caps"/></g></svg>

web/assets/img/headphones.svg

@@ -0,0 +1 @@
+<svg version="1.1" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.1429 0 0 1.1429 -36.128 15.982)" stroke="#000" stroke-width="40" style="paint-order:normal"><path transform="scale(-1)" d="m-60.17-296.45a200.55 200.55 0 01-83.602 209.44 200.55 200.55 0 01-225.51-.71844 200.55 200.55 0 01-82.266-209.97" fill="none" style="paint-order:normal"/><path d="m459.59 316.81a44.801 97.191 0 01-44.801 97.191 44.801 97.191 0 01-44.801-97.19 44.801 97.191 0 0144.8-97.192 44.801 97.191 0 0144.802 97.189" fill="#9f2b68" style="paint-order:normal"/><path d="m51.611 316.81a44.801 97.191 0 0144.801-97.19 44.801 97.191 0 0144.801 97.191 44.801 97.191 0 01-44.801 97.19 44.801 97.191 0 01-44.801-97.191" fill="#9f2b68" style="paint-order:normal"/></g></svg>

web/assets/img/note.svg

@@ -0,0 +1 @@
+<svg version="1.1" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path transform="matrix(.9978 .066276 -.61683 .78709 0 0)" d="m592.2 522.06c0 19.539-8.204 38.278-22.808 52.095-14.605 13.816-34.412 21.578-55.065 21.578s-40.46-7.762-55.064-21.578c-14.604-13.817-22.809-32.556-22.809-52.095 0-19.54 8.205-38.279 22.809-52.095 14.604-13.817 34.411-21.579 55.064-21.579 43.008 0 77.873 32.985 77.873 73.674z" fill="#9f2b68" stroke="#000" stroke-width="22.245"/><path d="m289.88 415.68c0 .503-.2.985-.555 1.341-.356.355-.838.555-1.341.555-1.046 0-1.895-.849-1.895-1.896 0-1.046.849-1.895 1.895-1.895.503 0 .985.2 1.341.555.355.356.555.838.555 1.34z" stroke-width="1.2638"/><path d="m281.19 408.95c0 1.047-.849 1.895-1.896 1.895s-1.896-.848-1.896-1.895c0-.503.2-.985.556-1.341.355-.355.837-.555 1.34-.555s.985.2 1.34.555c.356.356.556.838.556 1.341z" stroke-width="1.2638"/><path d="m280.73 32.078v384.56" fill="none" stroke="#000" stroke-width="27"/><path d="m293.03 52.222c77.939.0697 9.165 140.67 121.96 195.68" fill="none" stroke="#000" stroke-width="40.44"/></svg>

web/assets/img/play.svg

@@ -0,0 +1 @@
+<svg version="1.1" viewBox="0 0 17 17" xmlns="http://www.w3.org/2000/svg"><path d="m1.1317 1.8418v6.6254l-.0005522 6.6248 6.6353-3.3119 6.6348-3.3113-6.6348-3.3135z" fill="#9f2b68" stroke="#000" stroke-width="2"/></svg>

web/assets/img/stop.svg

@@ -0,0 +1 @@
+<svg version="1.1" viewBox="0 0 17 17" xmlns="http://www.w3.org/2000/svg"><rect x="1" y="1" width="14" height="14" fill="#9f2b68" stroke="#000" stroke-width="3"/></svg>

web/assets/js/main.js

@@ -1,46 +1,92 @@
-function $(id) { return document.getElementById(id); }
+const $ = id => document.getElementById(id);
 
-function updateRadioStatus() {
-	fetch("/status")
-	.then(r => r.json())
-	.then(r => {
-		$("radio-status").innerHTML = 
-			`On-air since <time datetime="${r.server_start_iso8601}">${r.server_start_date}</time>`;
-		$("radio-song").textContent = r.song;
-		$("radio-listeners").textContent = r.listeners;
-		$("radio-listener-peak").textContent = r.listener_peak;
-	}).catch(() => {
-		$("radio-status").textContent = "Radio is offline.";
-		$("radio-song").textContent = "";
-		$("radio-listeners").textContent =
-			$("radio-listener-peak").textContent = "0";
-	});
+const formatDuration = date => `${date.getUTCHours() > 0 ? date.getUTCHours() + ":" : ""}${date.getUTCMinutes()}:${date.getUTCSeconds().toString().padStart(2, "0")}`;
+const formatStartAt = date => `${date.getHours().toString().padStart(2, "0")}:${date.getMinutes().toString().padStart(2, "0")}`;
+
+let cursong_startat = null;
+let cursong_duration_msec = 0;
+
+async function updateStatus() {
+	const resp = await fetch("/api/status");
+
+	if (!resp.ok || 200 != resp.status) {
+		$("radio-song").textContent =
+			$("radio-duration-estimate").textContent =
+				$("radio-duration").textContent = "";
+		$("radio-listeners").textContent = "0";
+		$("last-songs").lastChild.remove();
+		return [-1, null];
+	}
+
+	const s = await resp.json();
+
+	if (undefined != s.last_songs) {
+		$("last-songs").lastChild.remove();
+		$("last-songs").appendChild(document.createElement("tbody"));
+		for (let i = 0; i < s.last_songs.length; ++i) {
+			let row = $("last-songs").lastChild.insertRow();
+			row.insertCell().appendChild(document.createTextNode(formatStartAt(new Date(s.last_songs[i].start_at))));
+			row.insertCell().appendChild(document.createTextNode((s.last_songs[i].listeners == undefined ? "" : s.last_songs[i].listeners + "/") + (s.last_songs[i].peak_listeners == undefined ? "" : s.last_songs[i].peak_listeners)));
+			row.insertCell().appendChild(document.createTextNode(`${s.last_songs[i].artist} - ${s.last_songs[i].title}`));
+		}
+	}
+
+	if (undefined == s.current_song || undefined == s.current_song.duration_msec)
+		return [-1, null];
+
+	$("radio-song").textContent = `${s.current_song.artist} - ${s.current_song.title}`;
+	$("radio-listeners").textContent = s.listeners;
+	$("radio-duration").textContent = formatDuration(new Date(s.current_song.duration_msec));
+
+	return [s.current_song.duration_msec, new Date(s.current_song.start_at)];
 }
 
-function updateLastPlayedSong() {
-	fetch('/lastsong')
-	.then(r => r.json())
-	.then(last_played => {
-		if (last_played.time == $('last-played').firstChild.lastChild.firstChild.innerText)
-			return;
-		
-		if ($('last-played').firstChild === null)
-			$('last-played').appendChild(document.createElement("tbody"))
+async function update() {
+	if (null === cursong_startat)
+		return -1;
 
-		if ($('last-played').firstChild.children.length == 10)
-			$('last-played').firstChild.firstChild.remove();
+	const estimate = (new Date()) - (new Date(cursong_startat));
+	if (estimate >= cursong_duration_msec) {
+		return 1;
+	}
 
-		let row = $('last-played').insertRow();
-		row.insertCell().appendChild(document.createTextNode(last_played.time));
-		row.insertCell().appendChild(document.createTextNode(last_played.listeners == 0 ? "" : last_played.listeners));
-		row.insertCell().appendChild(document.createTextNode(last_played.song));
-	});
+	$("radio-duration-estimate").textContent = `${formatDuration(new Date(estimate))} / `;
+	return 0;
 }
 
-document.getElementById("btn-update").addEventListener("click", () => {
-	updateLastPlayedSong();
-	updateRadioStatus();
-})
+let update_interval_id = null;
+async function interval() {
+	switch (await update()) {
+		case 1:
+			[cursong_duration_msec, cursong_startat] = await updateStatus();
+			break;
+		case -1:
+			clearInterval(update_interval_id);
+			await new Promise(resolve => setTimeout(resolve, 5000));
+			[cursong_duration_msec, cursong_startat] = await updateStatus();
+			update_interval_id = setInterval(interval, 1000);
+	}
+}
 
-setInterval(updateRadioStatus, 45000);
-setInterval(updateLastPlayedSong, 45000);
+updateStatus().then(r => [cursong_duration_msec, cursong_startat] = r);
+update_interval_id = setInterval(interval, 1000);
+
+
+
+const audio = document.getElementsByTagName("audio")[0];
+audio.hidden = true;
+const audio_src = audio.childNodes[0].src;
+
+const volume = $("radio-volume");
+volume.value = +(localStorage.getItem("volume") || 50);
+audio.volume = volume.value / 100.0;
+volume.addEventListener("input", e => {
+	audio.volume = e.target.value / 100.0;
+	localStorage.setItem("volume", e.target.value); });
+
+$("player").style.display = $("player").firstChild.style.display = "flex";
+
+$("radio-play").addEventListener("click", e => {
+	audio.paused ? (audio.src = audio_src) && audio.play() : audio.src = "";
+	e.target.style.backgroundImage = audio.paused ?
+		"url(/assets/img/play.svg)" : "url(/assets/img/stop.svg)"; });

web/assets/robots.txt

@@ -0,0 +1,3 @@
+User-agent: *
+Disallow: /assets/
+Disallow: /live/

web/assets/sitemap.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+    <url>
+        <loc>https://radio.arav.su/</loc>
+        <lastmod>2024-03-06</lastmod>
+    </url>
+    <url>
+        <loc>https://radio.arav.su/filelist</loc>
+        <changefreq>always</changefreq>
+    </url>
+        <url>
+        <loc>https://radio.arav.su/playlist</loc>
+        <lastmod>2023-02-23</lastmod>
+    </url>
+</urlset>

web/index.templ

@@ -0,0 +1,129 @@
+package web
+
+import "net/http"
+import "strconv"
+
+import "github.com/invopop/ctxi18n/i18n"
+
+import "dwelling-radio/internal/radio"
+import "dwelling-radio/pkg/utils"
+
+templ Index(prgVer string, curSong *radio.Song, sl []radio.Song, slLen int64, lstnrs *radio.ListenerCounter, r *http.Request) {
+<!DOCTYPE html>
+<html lang={ i18n.GetLocale(ctx).Code().String() }>
+<head>
+	<meta charset="utf-8" />
+	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
+	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+	<meta name="theme-color" content="#cd2682" />
+	<meta name="color-scheme" content="light dark" />
+
+	<title>Arav's dwelling / { i18n.T(ctx, "title") }</title>
+
+	<meta name="author" content={ "Alexander \"Arav\" Andreev" } />
+	<meta name="description" content={ i18n.T(ctx, "description") } />
+	<meta name="keywords" content={ i18n.T(ctx, "keywords") } />
+
+	<link rel="canonical" href={ utils.Site(r.Host) } />
+
+	<link rel="icon" href="/assets/img/favicon.svg" sizes="any" type="image/svg+xml" />
+	<link rel="stylesheet" href="/assets/css/main.css" />
+
+	<script src="/assets/js/main.js" defer />
+</head>
+<body>
+	<header>
+		<svg width="360" viewBox="0 -36 360 66">
+			<text y="7" textLength="360" lengthAdjust="spacingAndGlyphs">Arav's dwelling</text>
+			<text y="25" textLength="360" lengthAdjust="spacingAndGlyphs">Welcome to my sacred place, wanderer</text>
+		</svg>
+		<nav>
+			<a href={ templ.SafeURL(utils.MainSite(r.Host)) }>{ i18n.T(ctx, "back-home") }</a>
+			<h1>{ i18n.T(ctx, "title") }</h1>
+		</nav>
+	</header>
+	<section id="banner">
+		<video playsinline autoplay loop muted>
+			<source src="/assets/img/stopit.mp4" type="video/mp4" />
+		</video>
+	</section>
+	<section>
+		<div class="small player-links">
+			<a href="/filelist">{ i18n.T(ctx, "link.filelist") }</a>
+			<a href="/playlist">{ i18n.T(ctx, "link.playlist") }</a>
+			<a href="/live/stream.ogg">{ i18n.T(ctx, "link.direct-link") }</a>
+			(<a href="http://radio.arav.su:8000/stream.ogg">http</a>
+			<a href="http://wsmkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion/live/stream.ogg">Tor</a>
+			<a href="http://radio.arav.i2p/live/stream.ogg">I2P</a>
+			<a href="http://[300:a98d:d6d0:8a08::e]/live/stream.ogg">Ygg</a>)
+			<a href="https://dir.xiph.org/search?q=arav's+dwelling">Xiph</a>
+			| OGG 128 Kb/s
+		</div>
+		<div id="player">
+			<div>
+				<button id="radio-play" />
+				<input id="radio-volume" type="range" min="0" max="100" orient="vertical" />
+			</div>
+			<audio preload="none" controls playsinline>
+				<source src="/live/stream.ogg" type="audio/ogg" />
+				{ i18n.T(ctx, "no-audio-tag") } <a href="/playlist">{ i18n.T(ctx, "link.playlist") }</a>.
+			</audio>
+			<div>
+				<p>
+					<img src="/assets/img/headphones.svg" alt="Listeners" title="Listeners" />
+					<span id="radio-listeners">{ strconv.FormatInt(lstnrs.Current(), 10) }</span>
+					<img src="/assets/img/duration.svg" alt="Duration" title="Duration" />
+					<span id="radio-duration-estimate"></span>
+					<span id="radio-duration">
+						if curSong != nil && curSong.Artist != "" {
+							{ curSong.DurationString() }
+						} else {
+							0:00
+						}
+					</span>
+				</p>
+				<p>
+					<img src="/assets/img/note.svg" alt="Song" title="Song" />
+					<span id="radio-song">
+						if curSong != nil && curSong.Artist != "" {
+							{ curSong.Artist } - { curSong.Title }
+						}
+					</span>
+				</p>
+			</div>
+		</div>
+	</section>
+	<section>
+		<h2>{ i18n.T(ctx, "last-songs.h", i18n.M{"n": strconv.FormatInt(slLen, 10)}) }</h2>
+		<table id="last-songs">
+			<thead class="small">
+				<tr>
+					<td>{ i18n.T(ctx, "last-songs.tab-start") }</td>
+					<td><abbr title={ i18n.T(ctx, "last-songs.tab-stat-tip") }>{ i18n.T(ctx, "last-songs.tab-stat") }</abbr></td>
+					<td>{ i18n.T(ctx, "last-songs.tab-song") }</td>
+				</tr>
+			</thead>
+			<tbody>
+				for _, song := range sl {
+					<tr>
+						<td>{ utils.ToClientTimezone(song.StartAt, r).Format("15:04") }</td>
+						<td>
+							if song.PeakListeners != 0 {
+								{ strconv.FormatInt(song.Listeners, 10) }/{ strconv.FormatInt(song.PeakListeners, 10) }
+							}
+						</td>
+						<td>{ song.Artist } - { song.Title }</td>
+					</tr>
+				}
+			</tbody>
+		</table>
+	</section>
+	<footer>
+		<a href="?lang=ru">рус</a>
+		<a href="?lang=en">eng</a>
+		<br/>
+		v{ prgVer } 2017&mdash;2024 { i18n.T(ctx, "footer.author") } &lt;<a href="mailto:me@arav.su">me@arav.su</a>&gt; <a href={ templ.SafeURL(utils.MainSite(r.Host) + "/privacy") }>{ i18n.T(ctx, "footer.privacy") }</a>
+	</footer>
+</body>
+</html>
+}

web/jade.go

@@ -1,141 +0,0 @@
-// Code generated by "jade.go"; DO NOT EDIT.
-package web
-
-import (
-	"bytes"
-	"io"
-	"strconv"
-)
-
-var (
-	escaped   = []byte{'<', '>', '"', '\'', '&'}
-	replacing = []string{"&lt;", "&gt;", "&#34;", "&#39;", "&amp;"}
-)
-
-func WriteEscString(st string, buffer *WriterAsBuffer) {
-	for i := 0; i < len(st); i++ {
-		if n := bytes.IndexByte(escaped, st[i]); n >= 0 {
-			buffer.WriteString(replacing[n])
-		} else {
-			buffer.WriteByte(st[i])
-		}
-	}
-}
-
-type WriterAsBuffer struct {
-	io.Writer
-}
-
-func (w *WriterAsBuffer) WriteString(s string) (n int, err error) {
-	n, err = w.Write([]byte(s))
-	return
-}
-
-func (w *WriterAsBuffer) WriteByte(b byte) (err error) {
-	_, err = w.Write([]byte{b})
-	return
-}
-
-type stringer interface {
-	String() string
-}
-
-func WriteAll(a interface{}, escape bool, buffer *WriterAsBuffer) {
-	switch v := a.(type) {
-	case string:
-		if escape {
-			WriteEscString(v, buffer)
-		} else {
-			buffer.WriteString(v)
-		}
-	case int:
-		WriteInt(int64(v), buffer)
-	case int8:
-		WriteInt(int64(v), buffer)
-	case int16:
-		WriteInt(int64(v), buffer)
-	case int32:
-		WriteInt(int64(v), buffer)
-	case int64:
-		WriteInt(v, buffer)
-	case uint:
-		WriteUint(uint64(v), buffer)
-	case uint8:
-		WriteUint(uint64(v), buffer)
-	case uint16:
-		WriteUint(uint64(v), buffer)
-	case uint32:
-		WriteUint(uint64(v), buffer)
-	case uint64:
-		WriteUint(v, buffer)
-	case float32:
-		buffer.WriteString(strconv.FormatFloat(float64(v), 'f', -1, 64))
-	case float64:
-		buffer.WriteString(strconv.FormatFloat(v, 'f', -1, 64))
-	case bool:
-		WriteBool(v, buffer)
-	case stringer:
-		if escape {
-			WriteEscString(v.String(), buffer)
-		} else {
-			buffer.WriteString(v.String())
-		}
-	default:
-		buffer.WriteString("\n<<< unprinted type, fmt.Stringer implementation needed >>>\n")
-	}
-}
-
-func ternary(condition bool, iftrue, iffalse interface{}) interface{} {
-	if condition {
-		return iftrue
-	} else {
-		return iffalse
-	}
-}
-
-// Used part of go source:
-// https://github.com/golang/go/blob/master/src/strconv/itoa.go
-func WriteUint(u uint64, buffer *WriterAsBuffer) {
-	var a [64 + 1]byte
-	i := len(a)
-
-	if ^uintptr(0)>>32 == 0 {
-		for u > uint64(^uintptr(0)) {
-			q := u / 1e9
-			us := uintptr(u - q*1e9)
-			for j := 9; j > 0; j-- {
-				i--
-				qs := us / 10
-				a[i] = byte(us - qs*10 + '0')
-				us = qs
-			}
-			u = q
-		}
-	}
-
-	us := uintptr(u)
-	for us >= 10 {
-		i--
-		q := us / 10
-		a[i] = byte(us - q*10 + '0')
-		us = q
-	}
-
-	i--
-	a[i] = byte(us + '0')
-	buffer.Write(a[i:])
-}
-func WriteInt(i int64, buffer *WriterAsBuffer) {
-	if i < 0 {
-		buffer.WriteByte('-')
-		i = -i
-	}
-	WriteUint(uint64(i), buffer)
-}
-func WriteBool(b bool, buffer *WriterAsBuffer) {
-	if b {
-		buffer.WriteString("true")
-		return
-	}
-	buffer.WriteString("false")
-}

web/locales/en/en.yaml

@@ -0,0 +1,19 @@
+en:
+  title: Radio
+  description: Internet-radio broadcasting from under my desk.
+  keywords: self-host radio home-radio various music
+  back-home: Back home
+  link:
+    filelist: filelist
+    playlist: playlist
+    direct-link: direct link
+  no-audio-tag: Seems like your browser doesn't support an audio element, but you can grab the
+  last-songs:
+    h: Last %{n} songs
+    tab-start: Start
+    tab-stat: O/P
+    tab-stat-tip: Overall/Peak listeners
+    tab-song: Song
+  footer:
+    author: Alexander ❝Arav❞ Andreev
+    privacy: Privacy statements

web/locales/locales.go

@@ -0,0 +1,7 @@
+package locales
+
+import "embed"
+
+//go:embed en
+//go:embed ru
+var Content embed.FS

web/locales/ru/ru.yaml

@@ -0,0 +1,19 @@
+ru:
+  title: Радио
+  description: Интернет-радио вещающееся из-под моего стола.
+  keywords: само-хост селф-хост радио разное музыка
+  back-home: Назад домой
+  link:
+    filelist: список файлов
+    playlist: плейлист
+    direct-link: прямая ссылка
+  no-audio-tag: Похоже на то, что твой браузер не поддерживает audio элемент, хреновенько, но можешь взять
+  last-songs:
+    h: Последние %{n} песен
+    tab-start: Начало
+    tab-stat: В/П
+    tab-stat-tip: Всего/Пиковое кол-во слушателей
+    tab-song: Песня
+  footer:
+    author: Александр «Arav» Андреев
+    privacy: О приватности

web/templates/index.pug

@@ -1,66 +0,0 @@
-:go:func Index(mainSite string, songsNum int, status *radio.IcecastStatus, songs *[]radio.Song, r *http.Request)
-
-:go:import "dwelling-radio/internal/radio"
-:go:import "dwelling-radio/pkg/utils"
-
-doctype html
-html(lang='en')
-    head
-        title Arav's dwelling / Radio
-        meta(charset='utf-8')
-        meta(http-equiv='X-UA-Compatible' content='IE=edge')
-        meta(name='viewport' content='width=device-width, initial-scale=1.0')
-        meta(name='theme-color' content='#cd2682')
-        meta(name='description' content='Internet-radio broadcasting from under my desk.')
-        link(rel='icon' href='/assets/img/favicon.svg' sizes='any' type='image/svg+xml')
-        link(href='/assets/css/main.css' rel='stylesheet')
-        script(src='/assets/js/main.js' defer='')
-    body
-        header
-            svg#logo(viewBox='0 -25 216 40')
-                text.logo Arav's dwelling
-                text.under(y='11') Welcome to my sacred place, wanderer
-            nav
-                a(href=mainSite) Back to main website
-                h1 Radio
-        section
-            small.player-links
-                a(href='/filelist') filelist
-                a(href='/playlist') playlist (.m3u)
-                a(href='/live/stream.ogg') direct link
-                a(href='http://radio.arav.su:8000/stream.ogg') direct link (http)
-                a(href='http://wsmkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion/live/stream.ogg') direct link (Tor)
-                a(href='http://radio.arav.i2p/live/stream.ogg') direct link (I2P)
-                a(href="https://dir.xiph.org/search?q=arav's+dwelling") Xiph
-                | OGG 128 Kb/s
-            audio(preload='none' controls='')
-                source(src='/live/stream.ogg' type='audio/ogg')
-                | Your browser doesn't support an audio element, it's sad... But you always can take the #[a(href='/playlist') playlist]!
-            if status.ServerStartDate != ""
-                p#radio-status On-air since 
-                    time(datetime=status.ServerStartISO8601)= status.ServerStartDate
-            else
-                p#radio-status Radio is offline.
-            p Now playing: #[span#radio-song #{status.SongName}]
-            p Current/peak listeners: #[span#radio-listeners #{status.Listeners}] / #[span#radio-listener-peak #{status.ListenerPeak}]
-            p
-                small Notice: information updates every 45 seconds. But you can #[button(id='btn-update') update] it forcibly.
-        section
-            h2 Last #{songsNum} songs
-            table#last-played
-                each song in *songs
-                    tr
-                        td= song.Time
-                        if song.Listeners != "0"
-                            td= song.Listeners
-                        else
-                            td
-                        td= song.Song
-        - ml := radio.MostListened()
-        if ml.Song != ""
-            p.right Most listened song was "#{ml.Song}" on #{utils.ToClientTimezone(ml.Date, r).Format(radio.MostListenedDateFormat)} with #[b #{ml.Listeners}] listeners.
-        section
-            h2 Privacy statements
-            p Logs are collected and include access date and time, IP-address, User-Agent, referer URL, request. This website makes use of JavaScript to update a radio status and last #{songsNum} songs list.
-        footer
-            | 2017—2023 Alexander "Arav" Andreev <#[a(href='mailto:me@arav.su') me@arav.su]>

web/web.go

@@ -6,9 +6,6 @@ import (
 	"net/http"
 )
 
-// To install a Jade compiler: go install github.com/Joker/jade/cmd/jade@latest
-//go:generate $GOPATH/bin/jade -pkg=web -stdbuf -stdlib -writer templates/index.pug
-
 //go:embed assets
 var assetsDir embed.FS
 
@@ -17,6 +14,21 @@ func Assets() http.FileSystem {
 	return http.FS(f)
 }
 
-func AssetsGetFile(path string) ([]byte, error) {
-	return assetsDir.ReadFile("assets/" + path)
+func ServeAsset(path, mime, attachement string) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if mime != "" {
+			w.Header().Add("Content-Type", mime)
+		}
+
+		if attachement != "" {
+			w.Header().Add("Content-Disposition", "attachment; filename=\""+attachement+"\"")
+		}
+
+		data, err := assetsDir.ReadFile("assets/" + path)
+		if err != nil {
+			panic(err)
+		}
+
+		w.Write(data)
+	}
 }