Implement slash commands for playback control

internal/commands/loop.go

@@ -0,0 +1,62 @@
+package commands
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/disgoorg/disgo/discord"
+	"github.com/disgoorg/disgo/events"
+
+	"discord-music-bot/internal/music"
+)
+
+type LoopCommand struct {
+	deps *Dependencies
+}
+
+func NewLoopCommand(deps *Dependencies) *LoopCommand {
+	return &LoopCommand{deps: deps}
+}
+
+func (c *LoopCommand) Definition() discord.ApplicationCommandCreate {
+	return discord.SlashCommandCreate{
+		Name:        "loop",
+		Description: "Sets what happens when a track finishes",
+		Options: []discord.ApplicationCommandOption{
+			discord.ApplicationCommandOptionString{
+				Name:        "mode",
+				Description: "Loop mode",
+				Required:    true,
+				Choices: []discord.ApplicationCommandOptionChoiceString{
+					{Name: "Off", Value: "off"},
+					{Name: "Track", Value: "track"},
+					{Name: "Queue", Value: "queue"},
+				},
+			},
+		},
+	}
+}
+
+func (c *LoopCommand) Execute(ctx context.Context, event *events.ApplicationCommandInteractionCreate) error {
+	gid, err := requirePlaybackAccess(c.deps.Discord, event)
+	if err != nil {
+		return err
+	}
+
+	value := event.SlashCommandInteractionData().String("mode")
+
+	var mode music.LoopMode
+	switch value {
+	case "off":
+		mode = music.LoopOff
+	case "track":
+		mode = music.LoopTrack
+	case "queue":
+		mode = music.LoopQueue
+	default:
+		return rejectEphemeral(event, fmt.Sprintf("Unknown loop mode %q.", value))
+	}
+
+	c.deps.Music.Guild(gid).SetLoopMode(mode)
+	return reply(event, fmt.Sprintf("Loop mode set to **%s**.", mode))
+}