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arikawa/_example/advanced_bot/context.go

135 lines
3 KiB
Go

package main
import (
"context"
"errors"
"fmt"
"strconv"
"strings"
"time"
"github.com/diamondburned/arikawa/bot"
"github.com/diamondburned/arikawa/bot/extras/arguments"
"github.com/diamondburned/arikawa/discord"
"github.com/diamondburned/arikawa/gateway"
)
type Bot struct {
// Context must not be embedded.
Ctx *bot.Context
}
func (bot *Bot) Help(m *gateway.MessageCreateEvent) error {
_, err := bot.Ctx.SendMessage(m.ChannelID, bot.Ctx.Help(), nil)
return err
}
func (bot *Bot) Add(m *gateway.MessageCreateEvent, a, b int) error {
content := fmt.Sprintf("%d + %d = %d", a, b, a+b)
_, err := bot.Ctx.SendMessage(m.ChannelID, content, nil)
return err
}
func (bot *Bot) Ping(m *gateway.MessageCreateEvent) error {
_, err := bot.Ctx.SendMessage(m.ChannelID, "Pong!", nil)
return err
}
func (bot *Bot) Say(m *gateway.MessageCreateEvent, f *arguments.Flag) error {
args := f.String()
if args == "" {
// Empty message, ignore
return nil
}
_, err := bot.Ctx.SendMessage(m.ChannelID, args, nil)
return err
}
// Repeat tells the bot to wait for the user's response, then repeat what they
// said.
func (bot *Bot) Repeat(m *gateway.MessageCreateEvent) error {
_, err := bot.Ctx.SendMessage(m.ChannelID,
"What do you want me to say?", nil)
if err != nil {
return err
}
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
v := bot.Ctx.WaitFor(ctx, func(v interface{}) bool {
// Incoming event is a message create event:
mg, ok := v.(*gateway.MessageCreateEvent)
if !ok {
return false
}
// Message is from the same author:
return mg.Author.ID == m.Author.ID
})
if v == nil {
return errors.New("Timed out waiting for response.")
}
ev := v.(*gateway.MessageCreateEvent)
_, err = bot.Ctx.SendMessage(m.ChannelID, ev.Content, nil)
return err
}
func (bot *Bot) Embed(
m *gateway.MessageCreateEvent, f *arguments.Flag) error {
fs := arguments.NewFlagSet()
var (
title = fs.String("title", "", "Title")
author = fs.String("author", "", "Author")
footer = fs.String("footer", "", "Footer")
color = fs.String("color", "#FFFFFF", "Color in hex format #hhhhhh")
)
if err := f.With(fs.FlagSet); err != nil {
return err
}
if len(fs.Args()) < 1 {
return fmt.Errorf("Usage: embed [flags] content...\n" + fs.Usage())
}
// Check if the color string is valid.
if !strings.HasPrefix(*color, "#") || len(*color) != 7 {
return errors.New("Invalid color, format must be #hhhhhh")
}
// Parse the color into decimal numbers.
colorHex, err := strconv.ParseInt((*color)[1:], 16, 64)
if err != nil {
return err
}
// Make a new embed
embed := discord.Embed{
Title: *title,
Description: strings.Join(fs.Args(), " "),
Color: discord.Color(colorHex),
}
if *author != "" {
embed.Author = &discord.EmbedAuthor{
Name: *author,
}
}
if *footer != "" {
embed.Footer = &discord.EmbedFooter{
Text: *footer,
}
}
_, err = bot.Ctx.SendMessage(m.ChannelID, "", &embed)
return err
}