Introduce settings.json to store custom sources

app.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"log"
 	"net/http"
 	"time"
@@ -10,14 +11,16 @@ import (
 
 	"git.nemunai.re/nemunaire/hathoris/api"
 	"git.nemunai.re/nemunaire/hathoris/config"
+	"git.nemunai.re/nemunaire/hathoris/settings"
 	"git.nemunai.re/nemunaire/hathoris/sources"
 	"git.nemunai.re/nemunaire/hathoris/ui"
 )
 
 type App struct {
-	cfg    *config.Config
-	router *gin.Engine
-	srv    *http.Server
+	cfg      *config.Config
+	router   *gin.Engine
+	settings *settings.Settings
+	srv      *http.Server
 }
 
 func NewApp(cfg *config.Config) *App {
@@ -33,8 +36,15 @@ func NewApp(cfg *config.Config) *App {
 
 	// Prepare struct
 	app := &App{
-		cfg:    cfg,
-		router: router,
+		cfg:      cfg,
+		router:   router,
+		settings: loadUserSettings(cfg),
+	}
+
+	// Load user settings
+	err := app.loadCustomSources()
+	if err != nil {
+		log.Fatal(err.Error())
 	}
 
 	// Register routes
@@ -48,6 +58,33 @@ func NewApp(cfg *config.Config) *App {
 	return app
 }
 
+func loadUserSettings(cfg *config.Config) (s *settings.Settings) {
+	var err error
+	s, err = settings.Load(cfg)
+	if err != nil {
+		log.Fatal("Unable to load settings: ", err.Error())
+	}
+
+	return
+}
+
+func (app *App) loadCustomSources() error {
+	for id, csrc := range app.settings.CustomSources {
+		if newss, ok := sources.LoadableSources[csrc.Source]; !ok {
+			return fmt.Errorf("Unable to load source #%d: %q: no such source registered", id, csrc.Source)
+		} else {
+			src, err := newss(csrc.KV)
+			if err != nil {
+				return fmt.Errorf("Unable to load source #%d (%s): %w", id, csrc.Source, err)
+			}
+
+			sources.SoundSources[fmt.Sprintf("%s-%d", csrc.Source, id)] = src
+		}
+	}
+
+	return nil
+}
+
 func (app *App) Start() {
 	app.srv = &http.Server{
 		Addr:    app.cfg.Bind,
@@ -82,6 +119,11 @@ func (app *App) Stop() {
 		time.Sleep(2000 * time.Millisecond)
 	}
 
+	err := app.settings.Save(app.cfg.SettingsPath)
+	if err != nil {
+		log.Println("Unable to save settings: ", err.Error())
+	}
+
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	if err := app.srv.Shutdown(ctx); err != nil {

config/cli.go

@@ -9,6 +9,7 @@ func (c *Config) declareFlags() {
 	flag.StringVar(&c.BaseURL, "baseurl", c.BaseURL, "URL prepended to each URL")
 	flag.StringVar(&c.Bind, "bind", c.Bind, "Bind port/socket")
 	flag.StringVar(&c.DevProxy, "dev", c.DevProxy, "Use ui directory instead of embedded assets")
+	flag.StringVar(&c.SettingsPath, "settings-file", c.SettingsPath, "Path to settings.json file")
 
 	// Others flags are declared in some other files when they need specials configurations
 }
@@ -16,7 +17,8 @@ func (c *Config) declareFlags() {
 func Consolidated() (cfg *Config, err error) {
 	// Define defaults options
 	cfg = &Config{
-		Bind: "127.0.0.1:8080",
+		Bind:         "127.0.0.1:8080",
+		SettingsPath: "settings.json",
 	}
 
 	cfg.declareFlags()

config/config.go

@@ -6,9 +6,10 @@ import (
 )
 
 type Config struct {
-	DevProxy string
-	Bind     string
-	BaseURL  string
+	DevProxy     string
+	Bind         string
+	BaseURL      string
+	SettingsPath string
 }
 
 // parseLine treats a config line and place the read value in the variable

settings/settings.go

@@ -0,0 +1,66 @@
+package settings
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"git.nemunai.re/nemunaire/hathoris/config"
+)
+
+type CustomSource struct {
+	Source string            `json:"src"`
+	KV     map[string]string `json:"kv"`
+}
+
+type Settings struct {
+	CustomSources []CustomSource `json:"custom_sources"`
+}
+
+func Load(cfg *config.Config) (*Settings, error) {
+	if cfg.SettingsPath == "" {
+		return &Settings{}, nil
+	}
+
+	if st, err := os.Stat(cfg.SettingsPath); os.IsNotExist(err) || (err == nil && st.Size() == 0) {
+		fd, err := os.Create(cfg.SettingsPath)
+		if err != nil {
+			return nil, fmt.Errorf("unable to create settings file: %w", err)
+		}
+
+		_, err = fd.Write([]byte("{}"))
+		fd.Close()
+		if err != nil {
+			return nil, fmt.Errorf("unable to write to settings file: %w", err)
+		}
+	}
+
+	fd, err := os.Open(cfg.SettingsPath)
+	if err != nil {
+		return nil, fmt.Errorf("unable to open settings: %w", err)
+	}
+	defer fd.Close()
+
+	var settings Settings
+	err = json.NewDecoder(fd).Decode(&settings)
+	if err != nil {
+		return nil, fmt.Errorf("unable to read settings: %w", err)
+	}
+
+	return &settings, nil
+}
+
+func (settings *Settings) Save(path string) error {
+	fd, err := os.Create(path)
+	if err != nil {
+		return fmt.Errorf("unable to create settings file: %w", err)
+	}
+	defer fd.Close()
+
+	err = json.NewEncoder(fd).Encode(settings)
+	if err != nil {
+		return fmt.Errorf("unable to read settings: %w", err)
+	}
+
+	return nil
+}

sources/interfaces.go

@@ -2,7 +2,10 @@ package sources
 
 import ()
 
-var SoundSources = map[string]SoundSource{}
+var (
+	LoadableSources = map[string]LoadaleSource{}
+	SoundSources    = map[string]SoundSource{}
+)
 
 type SoundSource interface {
 	GetName() string
@@ -15,3 +18,5 @@ type SoundSource interface {
 type PlayingSource interface {
 	CurrentlyPlaying() string
 }
+
+type LoadaleSource func(map[string]string) (SoundSource, error)

sources/mpv/source.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"os/exec"
 	"path"
+	"strings"
 	"time"
 
 	"github.com/DexterLB/mpvipc"
@@ -22,22 +23,25 @@ type MPVSource struct {
 }
 
 func init() {
-	sources.SoundSources["mpv-nig"] = &MPVSource{
-		Name: "Radio NIG",
-		File: "http://stream.syntheticfm.com:8030/stream",
+	sources.LoadableSources["mpv"] = NewMPVSource
+}
+
+func NewMPVSource(kv map[string]string) (sources.SoundSource, error) {
+	var s MPVSource
+
+	if name, ok := kv["name"]; ok {
+		s.Name = name
 	}
-	sources.SoundSources["mpv-synthfm"] = &MPVSource{
-		Name: "Radio Synthetic FM",
-		File: "http://stream.syntheticfm.com:8040/stream",
+
+	if opts, ok := kv["opts"]; ok {
+		s.Options = strings.Split(opts, " ")
 	}
-	sources.SoundSources["mpv-nrw"] = &MPVSource{
-		Name: "NewRetroWave",
-		File: "https://youtube.com/channel/UCD-4g5w1h8xQpLaNS_ghU4g/videos",
-	}
-	sources.SoundSources["mpv-abgt"] = &MPVSource{
-		Name: "ABGT",
-		File: "https://youtube.com/playlist?list=PL6RLee9oArCArCAjnOtZ17dlVZQxaHG8G",
+
+	if file, ok := kv["file"]; ok {
+		s.File = file
 	}
+
+	return &s, nil
 }
 
 func (s *MPVSource) GetName() string {