micro/agent/input/discord/discord.go
Asim Aslam 49b86c56e3 go fmt
2020-01-29 22:40:43 +00:00

154 lines
2.8 KiB
Go

package discord
import (
"fmt"
"sync"
"errors"
"strings"
"github.com/bwmarrin/discordgo"
"github.com/micro/cli/v2"
"github.com/micro/go-micro/agent/input"
)
func init() {
input.Inputs["discord"] = newInput()
}
func newInput() *discordInput {
return &discordInput{}
}
type discordInput struct {
token string
whitelist []string
prefix string
prefixfn func(string) (string, bool)
botID string
session *discordgo.Session
sync.Mutex
running bool
exit chan struct{}
}
func (d *discordInput) Flags() []cli.Flag {
return []cli.Flag{
&cli.StringFlag{
Name: "discord_token",
EnvVars: []string{"MICRO_DISCORD_TOKEN"},
Usage: "Discord token (prefix with Bot if it's for bot account)",
},
&cli.StringFlag{
Name: "discord_whitelist",
EnvVars: []string{"MICRO_DISCORD_WHITELIST"},
Usage: "Discord Whitelist (seperated by ,)",
},
&cli.StringFlag{
Name: "discord_prefix",
Usage: "Discord Prefix",
EnvVars: []string{"MICRO_DISCORD_PREFIX"},
Value: "Micro ",
},
}
}
func (d *discordInput) Init(ctx *cli.Context) error {
token := ctx.String("discord_token")
whitelist := ctx.String("discord_whitelist")
prefix := ctx.String("discord_prefix")
if len(token) == 0 {
return errors.New("require token")
}
d.token = token
d.prefix = prefix
if len(whitelist) > 0 {
d.whitelist = strings.Split(whitelist, ",")
}
return nil
}
func (d *discordInput) Start() error {
if len(d.token) == 0 {
return errors.New("missing discord configuration")
}
d.Lock()
defer d.Unlock()
if d.running {
return nil
}
var err error
d.session, err = discordgo.New(d.token)
if err != nil {
return err
}
u, err := d.session.User("@me")
if err != nil {
return err
}
d.botID = u.ID
d.prefixfn = CheckPrefixFactory(fmt.Sprintf("<@%s> ", d.botID), fmt.Sprintf("<@!%s> ", d.botID), d.prefix)
d.exit = make(chan struct{})
d.running = true
return nil
}
func (d *discordInput) Stream() (input.Conn, error) {
d.Lock()
defer d.Unlock()
if !d.running {
return nil, errors.New("not running")
}
//Fire-n-forget close just in case...
d.session.Close()
conn := newConn(d)
if err := d.session.Open(); err != nil {
return nil, err
}
return conn, nil
}
func (d *discordInput) Stop() error {
d.Lock()
defer d.Unlock()
if !d.running {
return nil
}
close(d.exit)
d.running = false
return nil
}
func (d *discordInput) String() string {
return "discord"
}
// CheckPrefixFactory Creates a prefix checking function and stuff.
func CheckPrefixFactory(prefixes ...string) func(string) (string, bool) {
return func(content string) (string, bool) {
for _, prefix := range prefixes {
if strings.HasPrefix(content, prefix) {
return strings.TrimPrefix(content, prefix), true
}
}
return "", false
}
}