147 lines
3.8 KiB
Go
147 lines
3.8 KiB
Go
package main
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import (
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"context"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/diamondburned/arikawa/bot"
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"github.com/diamondburned/arikawa/bot/extras/arguments"
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"github.com/diamondburned/arikawa/bot/extras/middlewares"
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"github.com/diamondburned/arikawa/discord"
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"github.com/diamondburned/arikawa/gateway"
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)
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type Bot struct {
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// Context must not be embedded.
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Ctx *bot.Context
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}
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func (bot *Bot) Setup(sub *bot.Subcommand) {
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// Only allow people in guilds to run guildInfo.
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sub.AddMiddleware("GuildInfo", middlewares.GuildOnly(bot.Ctx))
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}
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// Help prints the default help message.
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func (bot *Bot) Help(*gateway.MessageCreateEvent) (string, error) {
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return bot.Ctx.Help(), nil
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}
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// Add demonstrates the usage of typed arguments. Run it with "~add 1 2".
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func (bot *Bot) Add(_ *gateway.MessageCreateEvent, a, b int) (string, error) {
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return fmt.Sprintf("%d + %d = %d", a, b, a+b), nil
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}
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// Ping is a simple ping example, perhaps the most simple you could make it.
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func (bot *Bot) Ping(*gateway.MessageCreateEvent) (string, error) {
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return "Pong!", nil
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}
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// Say demonstrates how arguments.Flag could be used without the flag library.
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func (bot *Bot) Say(_ *gateway.MessageCreateEvent, f bot.RawArguments) (string, error) {
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if f != "" {
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return string(f), nil
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}
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return "", errors.New("missing content")
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}
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// GuildInfo demonstrates the GuildOnly middleware done in (*Bot).Setup().
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func (bot *Bot) GuildInfo(m *gateway.MessageCreateEvent) (string, error) {
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g, err := bot.Ctx.GuildWithCount(m.GuildID)
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if err != nil {
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return "", fmt.Errorf("failed to get guild: %v", err)
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}
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return fmt.Sprintf(
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"Your guild is %s, and its maximum members is %d",
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g.Name, g.ApproximateMembers,
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), nil
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}
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// Repeat tells the bot to wait for the user's response, then repeat what they
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// said.
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func (bot *Bot) Repeat(m *gateway.MessageCreateEvent) (string, error) {
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_, err := bot.Ctx.SendMessage(m.ChannelID, "What do you want me to say?", nil)
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if err != nil {
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return "", err
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}
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ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
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defer cancel()
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// This might miss events that are sent immediately after. To make sure all
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// events are caught, ChanFor should be used.
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v := bot.Ctx.WaitFor(ctx, func(v interface{}) bool {
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// Incoming event is a message create event:
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mg, ok := v.(*gateway.MessageCreateEvent)
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if !ok {
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return false
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}
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// Message is from the same author:
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return mg.Author.ID == m.Author.ID
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})
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if v == nil {
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return "", errors.New("timed out waiting for response")
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}
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ev := v.(*gateway.MessageCreateEvent)
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return ev.Content, nil
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}
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// Embed is a simple embed creator. Its purpose is to demonstrate the usage of
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// the ParseContent interface, as well as using the stdlib flag package.
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func (bot *Bot) Embed(_ *gateway.MessageCreateEvent, f arguments.Flag) (*discord.Embed, error) {
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fs := arguments.NewFlagSet()
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var (
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title = fs.String("title", "", "Title")
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author = fs.String("author", "", "Author")
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footer = fs.String("footer", "", "Footer")
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color = fs.String("color", "#FFFFFF", "Color in hex format #hhhhhh")
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)
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if err := f.With(fs.FlagSet); err != nil {
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return nil, err
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}
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if len(fs.Args()) < 1 {
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return nil, fmt.Errorf("usage: embed [flags] content...\n" + fs.Usage())
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}
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// Check if the color string is valid.
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if !strings.HasPrefix(*color, "#") || len(*color) != 7 {
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return nil, errors.New("invalid color, format must be #hhhhhh")
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}
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// Parse the color into decimal numbers.
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colorHex, err := strconv.ParseInt((*color)[1:], 16, 64)
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if err != nil {
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return nil, err
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}
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// Make a new embed
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embed := discord.Embed{
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Title: *title,
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Description: strings.Join(fs.Args(), " "),
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Color: discord.Color(colorHex),
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}
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if *author != "" {
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embed.Author = &discord.EmbedAuthor{
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Name: *author,
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}
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}
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if *footer != "" {
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embed.Footer = &discord.EmbedFooter{
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Text: *footer,
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}
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}
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return &embed, err
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}
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