twitch-bot-tools/dc-invite/invite.go

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package main
import (
"bytes"
"context"
"encoding/json"
"fmt"
"net/http"
"strings"
"time"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const discordRequestTimeout = 2 * time.Second
type (
createChannelInviteReq struct {
MaxAge int64 `json:"max_age"`
MaxUses int64 `json:"max_uses"`
Temporary bool `json:"temporary"`
Unique bool `json:"unique"`
// more unsupported params
}
createChannelInviteResp struct {
Code string `json:"code"`
// more unsupported params
}
)
func createInvite() (string, error) {
ctx, cancel := context.WithTimeout(context.Background(), discordRequestTimeout)
defer cancel()
var (
body = new(bytes.Buffer)
err error
reqURL = fmt.Sprintf("https://discord.com/api/channels/%s/invites", cfg.ChannelID)
)
if err = json.NewEncoder(body).Encode(createChannelInviteReq{
MaxAge: int64(cfg.ExpireIn / time.Second),
MaxUses: cfg.Uses,
Temporary: false,
Unique: true,
}); err != nil {
return "", errors.Wrap(err, "encoding request body")
}
req, err := http.NewRequestWithContext(ctx, http.MethodPost, reqURL, body)
if err != nil {
return "", errors.Wrap(err, "creating request")
}
req.Header.Set("Authorization", strings.Join([]string{"Bot", cfg.DiscordBotToken}, " "))
req.Header.Set("Content-Type", "application/json")
req.Header.Set("X-Audit-Log-Reason", fmt.Sprintf("twitch-bot-tools/dc-invite requested for %s", cfg.SendTo))
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", errors.Wrap(err, "executing request")
}
defer func() {
if err := resp.Body.Close(); err != nil {
logrus.WithError(err).Error("closing response body (leaked fd)")
}
}()
if resp.StatusCode != http.StatusOK {
return "", errors.Errorf("unexpected status %d", resp.StatusCode)
}
var invite createChannelInviteResp
if err = json.NewDecoder(resp.Body).Decode(&invite); err != nil {
return "", errors.Wrap(err, "decoding invite response")
}
return invite.Code, nil
}