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fix: pass original markdown to sendHTMLChunk for plain-text fallback

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When HTML parsing fails, the fallback was re-sending the same HTML
string with ParseMode cleared, showing raw HTML tags to users.
Now pass the original markdown chunk so the fallback displays
readable plain text instead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
I Putu Eddy Irawan 2026-03-04 22:15:17 +07:00
parent 8bd1935efb
commit 3de4cb863b
1 changed files with 6 additions and 4 deletions
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10
pkg/channels/telegram/telegram.go
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@ -255,14 +255,14 @@ func (c *TelegramChannel) Send(ctx context.Context, msg bus.OutboundMessage) err
} }
subChunks := channels.SplitMessage(chunk, smallerLen) subChunks := channels.SplitMessage(chunk, smallerLen)
for _, sub := range subChunks { for _, sub := range subChunks {
if err := c.sendHTMLChunk(ctx, chatID, markdownToTelegramHTML(sub)); err != nil { if err := c.sendHTMLChunk(ctx, chatID, markdownToTelegramHTML(sub), sub); err != nil {
return err return err
} }
} }
continue continue
} }
if err := c.sendHTMLChunk(ctx, chatID, htmlContent); err != nil { if err := c.sendHTMLChunk(ctx, chatID, htmlContent, chunk); err != nil {
return err return err
} }
} }
@ -270,8 +270,9 @@ func (c *TelegramChannel) Send(ctx context.Context, msg bus.OutboundMessage) err
return nil return nil
} }
// sendHTMLChunk sends a single HTML message, falling back to plain text on parse failure. // sendHTMLChunk sends a single HTML message, falling back to the original
func (c *TelegramChannel) sendHTMLChunk(ctx context.Context, chatID int64, htmlContent string) error { // markdown as plain text on parse failure so users never see raw HTML tags.
func (c *TelegramChannel) sendHTMLChunk(ctx context.Context, chatID int64, htmlContent, mdFallback string) error {
tgMsg := tu.Message(tu.ID(chatID), htmlContent) tgMsg := tu.Message(tu.ID(chatID), htmlContent)
tgMsg.ParseMode = telego.ModeHTML tgMsg.ParseMode = telego.ModeHTML
@ -279,6 +280,7 @@ func (c *TelegramChannel) sendHTMLChunk(ctx context.Context, chatID int64, htmlC
logger.ErrorCF("telegram", "HTML parse failed, falling back to plain text", map[string]any{ logger.ErrorCF("telegram", "HTML parse failed, falling back to plain text", map[string]any{
"error": err.Error(), "error": err.Error(),
}) })
tgMsg.Text = mdFallback
tgMsg.ParseMode = "" tgMsg.ParseMode = ""
if _, err = c.bot.SendMessage(ctx, tgMsg); err != nil { if _, err = c.bot.SendMessage(ctx, tgMsg); err != nil {
return fmt.Errorf("telegram send: %w", channels.ErrTemporary) return fmt.Errorf("telegram send: %w", channels.ErrTemporary)