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Fix for complex-formatted Telegram text (#1765)

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* Telegram: handle entities before everything

* Telegram: use runes for text entities

* Telegram: use proper offset and runes for links

* Telegram: put newline after backticks for pre

* Telegram: use utf16 for entity processing
This commit is contained in:
ValdikSS 2022-03-19 13:34:46 +03:00 committed by GitHub
parent b3be2e208c
commit c51753cab1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 12 deletions
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28
bridge/telegram/handlers.go
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@ -187,6 +187,9 @@ func (b *Btelegram) handleRecv(updates <-chan tgbotapi.Update) {
rmsg.ID = strconv.Itoa(message.MessageID)
rmsg.Channel = strconv.FormatInt(message.Chat.ID, 10)
// handle entities (adding URLs)
b.handleEntities(&rmsg, message)
// handle username
b.handleUsername(&rmsg, message)
@ -202,9 +205,6 @@ func (b *Btelegram) handleRecv(updates <-chan tgbotapi.Update) {
// quote the previous message
b.handleQuoting(&rmsg, message)
// handle entities (adding URLs)
b.handleEntities(&rmsg, message)
if rmsg.Text != "" || len(rmsg.Extra) > 0 {
// Comment the next line out due to avoid removing empty lines in Telegram
// rmsg.Text = helper.RemoveEmptyNewLines(rmsg.Text)
@ -489,46 +489,50 @@ func (b *Btelegram) handleEntities(rmsg *config.Message, message *tgbotapi.Messa
// for now only do URL replacements
for _, e := range message.Entities {
asRunes := utf16.Encode([]rune(rmsg.Text))
if e.Type == "text_link" {
offset := e.Offset + indexMovedBy
url, err := e.ParseURL()
if err != nil {
b.Log.Errorf("entity text_link url parse failed: %s", err)
continue
}
utfEncodedString := utf16.Encode([]rune(rmsg.Text))
if e.Offset+e.Length > len(utfEncodedString) {
b.Log.Errorf("entity length is too long %d > %d", e.Offset+e.Length, len(utfEncodedString))
if offset+e.Length > len(utfEncodedString) {
b.Log.Errorf("entity length is too long %d > %d", offset+e.Length, len(utfEncodedString))
continue
}
link := utf16.Decode(utfEncodedString[e.Offset : e.Offset+e.Length])
rmsg.Text = strings.Replace(rmsg.Text, string(link), url.String(), 1)
rmsg.Text = string(utf16.Decode(asRunes[:offset+e.Length])) + " (" + url.String() + ")" + string(utf16.Decode(asRunes[offset+e.Length:]))
indexMovedBy += len(url.String()) + 3
}
if e.Type == "code" {
offset := e.Offset + indexMovedBy
rmsg.Text = rmsg.Text[:offset] + "`" + rmsg.Text[offset:offset+e.Length] + "`" + rmsg.Text[offset+e.Length:]
rmsg.Text = string(utf16.Decode(asRunes[:offset])) + "`" + string(utf16.Decode(asRunes[offset:offset+e.Length])) + "`" + string(utf16.Decode(asRunes[offset+e.Length:]))
indexMovedBy += 2
}
if e.Type == "pre" {
offset := e.Offset + indexMovedBy
rmsg.Text = rmsg.Text[:offset] + "```\n" + rmsg.Text[offset:offset+e.Length] + "\n```" + rmsg.Text[offset+e.Length:]
rmsg.Text = string(utf16.Decode(asRunes[:offset])) + "```\n" + string(utf16.Decode(asRunes[offset:offset+e.Length])) + "```\n" + string(utf16.Decode(asRunes[offset+e.Length:]))
indexMovedBy += 8
}
if e.Type == "bold" {
offset := e.Offset + indexMovedBy
rmsg.Text = rmsg.Text[:offset] + "*" + rmsg.Text[offset:offset+e.Length] + "*" + rmsg.Text[offset+e.Length:]
rmsg.Text = string(utf16.Decode(asRunes[:offset])) + "*" + string(utf16.Decode(asRunes[offset:offset+e.Length])) + "*" + string(utf16.Decode(asRunes[offset+e.Length:]))
indexMovedBy += 2
}
if e.Type == "italic" {
offset := e.Offset + indexMovedBy
rmsg.Text = rmsg.Text[:offset] + "_" + rmsg.Text[offset:offset+e.Length] + "_" + rmsg.Text[offset+e.Length:]
rmsg.Text = string(utf16.Decode(asRunes[:offset])) + "_" + string(utf16.Decode(asRunes[offset:offset+e.Length])) + "_" + string(utf16.Decode(asRunes[offset+e.Length:]))
indexMovedBy += 2
}
if e.Type == "strike" {
offset := e.Offset + indexMovedBy
rmsg.Text = rmsg.Text[:offset] + "~" + rmsg.Text[offset:offset+e.Length] + "~" + rmsg.Text[offset+e.Length:]
rmsg.Text = string(utf16.Decode(asRunes[:offset])) + "~" + string(utf16.Decode(asRunes[offset:offset+e.Length])) + "~" + string(utf16.Decode(asRunes[offset+e.Length:]))
indexMovedBy += 2
}
}