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package bdiscord
import (
"bytes"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/bridge/helper"
"github.com/bwmarrin/discordgo"
)
// shouldMessageUseWebhooks checks if have a channel specific webhook, if we're not using auto webhooks
func (b *Bdiscord) shouldMessageUseWebhooks(msg *config.Message) bool {
if b.useAutoWebhooks {
return true
}
b.channelsMutex.RLock()
defer b.channelsMutex.RUnlock()
if ci, ok := b.channelInfoMap[msg.Channel+b.Account]; ok {
if ci.Options.WebhookURL != "" {
return true
}
}
return false
}
// maybeGetLocalAvatar checks if UseLocalAvatar contains the message's
// account or protocol, and if so, returns the Discord avatar (if exists)
func (b *Bdiscord) maybeGetLocalAvatar(msg *config.Message) string {
for _, val := range b.GetStringSlice("UseLocalAvatar") {
if msg.Protocol != val && msg.Account != val {
continue
}
member, err := b.getGuildMemberByNick(msg.Username)
if err != nil {
return ""
}
return member.User.AvatarURL("")
}
return ""
}
// webhookSend send one or more message via webhook, taking care of file
// uploads (from slack, telegram or mattermost).
// Returns messageID and error.
func (b *Bdiscord) webhookSend(msg *config.Message, channelID string) (*discordgo.Message, error) {
var (
res *discordgo.Message
res2 *discordgo.Message
err error
)
// If avatar is unset, mutate the message to include the local avatar (but only if settings say we should do this)
if msg.Avatar == "" {
msg.Avatar = b.maybeGetLocalAvatar(msg)
}
// WebhookParams can have either `Content` or `File`.
// We can't send empty messages.
if msg.Text != "" {
res, err = b.transmitter.Send(
channelID,
&discordgo.WebhookParams{
Content: msg.Text,
Username: msg.Username,
AvatarURL: msg.Avatar,
AllowedMentions: b.getAllowedMentions(),
},
)
if err != nil {
b.Log.Errorf("Could not send text (%s) for message %#v: %s", msg.Text, msg, err)
}
}
if msg.Extra != nil {
for _, f := range msg.Extra["file"] {
fi := f.(config.FileInfo)
file := discordgo.File{
Name: fi.Name,
ContentType: "",
Reader: bytes.NewReader(*fi.Data),
}
content := fi.Comment
res2, err = b.transmitter.Send(
channelID,
&discordgo.WebhookParams{
Username: msg.Username,
AvatarURL: msg.Avatar,
Files: []*discordgo.File{&file},
Content: content,
AllowedMentions: b.getAllowedMentions(),
},
)
if err != nil {
b.Log.Errorf("Could not send file %#v for message %#v: %s", file, msg, err)
}
}
}
if msg.Text == "" {
res = res2
}
return res, err
}
func (b *Bdiscord) handleEventWebhook(msg *config.Message, channelID string) (string, error) {
// skip events
if msg.Event != "" && msg.Event != config.EventUserAction && msg.Event != config.EventJoinLeave && msg.Event != config.EventTopicChange {
return "", nil
}
// skip empty messages
if msg.Text == "" && (msg.Extra == nil || len(msg.Extra["file"]) == 0) {
b.Log.Debugf("Skipping empty message %#v", msg)
return "", nil
}
msg.Text = helper.ClipMessage(msg.Text, MessageLength, b.GetString("MessageClipped"))
msg.Text = b.replaceUserMentions(msg.Text)
// discord username must be [0..32] max
if len(msg.Username) > 32 {
msg.Username = msg.Username[0:32]
}
if msg.ID != "" {
b.Log.Debugf("Editing webhook message")
err := b.transmitter.Edit(channelID, msg.ID, &discordgo.WebhookParams{
Content: msg.Text,
Username: msg.Username,
AllowedMentions: b.getAllowedMentions(),
})
if err == nil {
return msg.ID, nil
}
b.Log.Errorf("Could not edit webhook message: %s", err)
}
b.Log.Debugf("Processing webhook sending for message %#v", msg)
discordMsg, err := b.webhookSend(msg, channelID)
if err != nil {
b.Log.Errorf("Could not broadcast via webhook for message %#v: %s", msg, err)
return "", err
}
if discordMsg == nil {
return "", nil
}
return discordMsg.ID, nil
}
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