#2 implement currently playing and volume

Author: Mateusz Lopacinski

pkg/stations/stations.go

@@ -55,7 +55,7 @@ func Load(path string) *List {
 		if os.IsNotExist(err) {
 			err = downloadStations(path)
 			if err != nil {
-				log.Fatalf("Cannot find or install stations ")
+				log.Fatalf("cannot find or install stations: %v", err)
 			}
 		}
 	}
@@ -91,10 +91,12 @@ func Load(path string) *List {
 func downloadStations(path string) error {
 	dir := filepath.Dir(path)
 	if _, err := os.Stat(dir); os.IsNotExist(err) {
-		err := os.Chdir(dir)
+		log.Printf("pyradio config dir not found, trying to create")
+		err := os.MkdirAll(dir, os.ModePerm)
 		if err != nil {
 			return err
 		}
+		log.Printf("created directory: %v", dir)
 	}
 
 	out, err := os.Create(path)

pkg/ui/events.go

@@ -3,17 +3,28 @@ package ui
 import (
 	"bufio"
 	"fmt"
+	"log"
+	"regexp"
+	"strconv"
 
-	tui "github.com/gizak/termui/v3"
 	"github.com/robopuff/goradio/pkg/driver"
+
+	tui "github.com/gizak/termui/v3"
+)
+
+const (
+	regexTitle  = `(?m)^ICY Info: StreamTitle='(.*?)';`
+	regexVolume = `(?m)Volume: (\d+)`
 )
 
 var colorSelected = "(fg:black,bg:white)"
 
 func manageKeyboardEvent(e tui.Event, d driver.Driver) int {
 	if e.Type == tui.ResizeEvent {
 		tui.Clear()
-		Init(stationsList, debug)
+		if err := Init(stationsList, debug); err != nil {
+			log.Fatalf("failed to initialize ui: %v", err)
+		}
 	}
 
 	switch e.ID {
@@ -80,9 +91,8 @@ func manageKeyboardEvent(e tui.Event, d driver.Driver) int {
 }
 
 func manageDriverLogs(d driver.Driver) {
-	if !debug {
-		return
-	}
+	titleRegex := regexp.MustCompile(regexTitle)
+	volumeRegex := regexp.MustCompile(regexVolume)
 
 	for {
 		select {
@@ -91,15 +101,39 @@ func manageDriverLogs(d driver.Driver) {
 			for {
 				data, err := reader.ReadString('\n')
 				if err != nil {
-					log(fmt.Sprintf("Pipe closed: %v", err.Error()))
+					setCurrentlyPlaying("")
+					sendToLog(fmt.Sprintf("Pipe closed: %v", err.Error()))
 					break
 				}
-				log(data[:len(data)-1])
+
+				match := titleRegex.FindStringSubmatch(data)
+				if len(match) > 0 {
+					setCurrentlyPlaying(match[1])
+				}
+
+				match = volumeRegex.FindStringSubmatch(data)
+				if len(match) > 0 {
+					volume, _ := strconv.Atoi(match[1])
+					volumeGauge.Percent = volume
+					volumeGauge.Label = match[1]
+					render()
+				}
+
+				sendToLog(data[:len(data)-1])
 			}
 		}
 	}
 }
 
+func setCurrentlyPlaying(currently string) {
+	format := fmt.Sprintf(fullLineFormatter, currentlyPlayingFormat)
+	if currently == "" {
+		currently = "None"
+	}
+	uiPlayingParagraph.Text = fmt.Sprintf(format, currently)
+	render()
+}
+
 func addStationSelection() {
 	uiStationsList.Rows[current] = fmt.Sprintf("[%v]%s", uiStationsList.Rows[current], colorSelected)
 }

pkg/ui/ui.go

@@ -9,15 +9,26 @@ import (
 	"github.com/gizak/termui/v3/widgets"
 )
 
+const (
+	currentlyPlayingFormat = "Currently playing: %s"
+	helpFooter             = "k/↑ : Up | j/↓: Down | Enter: Select | p: Pause | m: Mute | s: Stop | +: Louder | -: Quieter | R: Refresh | q: Quit"
+)
+
+const (
+	colorGray tui.Color = 8
+)
+
 var (
 	current            = -1
 	debug              bool
 	w, h               int
+	fullLineFormatter  string
 	stationsList       *stations.List
 	uiPlayingParagraph *widgets.Paragraph
 	uiFooterParagraph  *widgets.Paragraph
 	uiStationsList     *widgets.List
 	uiLoggerList       *widgets.List
+	volumeGauge        *widgets.Gauge
 	drawables          []tui.Drawable
 )
 
@@ -32,29 +43,29 @@ func Init(csvStationsList *stations.List, debugFlag bool) error {
 
 	stationsList = csvStationsList
 
-	formatter := fmt.Sprintf("%%-%ds", w)
+	fullLineFormatter = fmt.Sprintf("%%-%ds", w)
 
 	uiPlayingParagraph = widgets.NewParagraph()
-	uiPlayingParagraph.Text = fmt.Sprintf(formatter, "Currently playing: None")
 	uiPlayingParagraph.SetRect(0, -1, w, 3)
 	uiPlayingParagraph.Border = false
 	uiPlayingParagraph.TextStyle.Fg = tui.ColorRed
+	setCurrentlyPlaying("")
 
 	uiFooterParagraph = widgets.NewParagraph()
-	uiFooterParagraph.Text = fmt.Sprintf(formatter, "k/↑ : Up | j/↓: Down | Enter: Select | p: Pause | m: Mute | s: Stop | +: Louder | -: Quieter | R: Refresh | q: Quit")
+	uiFooterParagraph.Text = fmt.Sprintf(fullLineFormatter, helpFooter)
 	uiFooterParagraph.WrapText = false
 	uiFooterParagraph.PaddingLeft = -1
 	uiFooterParagraph.PaddingRight = -1
 	uiFooterParagraph.SetRect(0, h-3, w, h)
 	uiFooterParagraph.Border = false
 	uiFooterParagraph.TextStyle.Fg = tui.ColorBlack
-	uiFooterParagraph.TextStyle.Bg = 8
+	uiFooterParagraph.TextStyle.Bg = colorGray
 
 	uiLoggerList = widgets.NewList()
-	uiLoggerList.Title = "[ log ]"
+	uiLoggerList.Title = "[ sendToLog ]"
 	uiLoggerList.SetRect(w/2, 1, w-1, h-2)
 	uiLoggerList.TextStyle.Fg = tui.ColorBlue
-	uiLoggerList.BorderStyle.Fg = 8
+	uiLoggerList.BorderStyle.Fg = colorGray
 	uiLoggerList.SelectedRowStyle.Fg = uiLoggerList.TextStyle.Fg
 	uiLoggerList.Rows = []string{""}
 
@@ -64,10 +75,16 @@ func Init(csvStationsList *stations.List, debugFlag bool) error {
 	uiStationsList.TextStyle.Modifier = tui.ModifierBold
 	uiStationsList.SelectedRowStyle.Modifier = tui.ModifierBold
 	uiStationsList.SelectedRowStyle.Fg = tui.ColorWhite
-	uiStationsList.SelectedRowStyle.Bg = 8
-	uiStationsList.BorderStyle.Fg = 8
+	uiStationsList.SelectedRowStyle.Bg = colorGray
+	uiStationsList.BorderStyle.Fg = colorGray
 	uiStationsList.WrapText = false
 
+	volumeGauge = widgets.NewGauge()
+	volumeGauge.Border = false
+	volumeGauge.SetRect(w-21, -1, w-1, 2)
+	volumeGauge.Percent = 25
+	volumeGauge.Label = "25"
+
 	if debug {
 		uiStationsList.SetRect(0, 1, (w/2)-1, h-2)
 	} else {
@@ -78,6 +95,7 @@ func Init(csvStationsList *stations.List, debugFlag bool) error {
 
 	drawables = []tui.Drawable{
 		uiPlayingParagraph,
+		volumeGauge,
 		uiFooterParagraph,
 		uiStationsList,
 	}
@@ -117,7 +135,7 @@ func render() {
 	tui.Render(drawables...)
 }
 
-func log(m string) {
+func sendToLog(m string) {
 	if !debug {
 		return
 	}