Implement slash commands for playback control

internal/commands/skip.go

@@ -0,0 +1,41 @@
+package commands
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/disgoorg/disgo/discord"
+	"github.com/disgoorg/disgo/events"
+)
+
+type SkipCommand struct {
+	deps *Dependencies
+}
+
+func NewSkipCommand(deps *Dependencies) *SkipCommand {
+	return &SkipCommand{deps: deps}
+}
+
+func (c *SkipCommand) Definition() discord.ApplicationCommandCreate {
+	return discord.SlashCommandCreate{
+		Name:        "skip",
+		Description: "Skips the current track",
+	}
+}
+
+func (c *SkipCommand) Execute(ctx context.Context, event *events.ApplicationCommandInteractionCreate) error {
+	gid, err := requirePlaybackAccess(c.deps.Discord, event)
+	if err != nil {
+		return err
+	}
+
+	track, hasNext, err := c.deps.Music.Guild(gid).Skip(ctx)
+	if err != nil {
+		return replyWithError(event, "Could not skip the current track.", err)
+	}
+
+	if !hasNext {
+		return reply(event, "Skipped. Queue is empty.")
+	}
+	return reply(event, fmt.Sprintf("Skipped. Now playing: **%s**", track.Info.Title))
+}