Files
sendico/api/notification/internal/server/notificationimp/telegram/message.go
Stephan D e08eb742e4
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+ contact requests
2025-11-19 14:42:38 +01:00

101 lines
1.9 KiB
Go

package telegram
import (
"fmt"
"html"
"strings"
)
type messageField struct {
label string
value string
}
type messageTemplate struct {
title string
fields []messageField
}
func (mt messageTemplate) Format(parseMode string) string {
var builder strings.Builder
builder.WriteString(mt.title)
builder.WriteString("\n")
builder.WriteString("-----------------------------\n")
formatter := selectValueFormatter(parseMode)
for _, field := range mt.fields {
appendMessageField(&builder, field.label, field.value, formatter)
}
return builder.String()
}
type valueFormatter func(string) string
func appendMessageField(builder *strings.Builder, label, value string, formatter valueFormatter) {
value = strings.TrimSpace(value)
if value == "" {
value = "—"
} else if formatter != nil {
value = formatter(value)
}
fmt.Fprintf(builder, "• %s: %s\n", label, value)
}
func selectValueFormatter(parseMode string) valueFormatter {
switch strings.ToLower(parseMode) {
case "markdown":
return func(value string) string {
return fmt.Sprintf("*%s*", escapeMarkdown(value))
}
case "markdownv2":
return func(value string) string {
return fmt.Sprintf("*%s*", escapeMarkdownV2(value))
}
case "html":
return func(value string) string {
return fmt.Sprintf("<b>%s</b>", html.EscapeString(value))
}
default:
return nil
}
}
var markdownEscaper = strings.NewReplacer(
"*", "\\*",
"_", "\\_",
"[", "\\[",
"]", "\\]",
"(", "\\(",
")", "\\)",
"`", "\\`",
)
var markdownV2Escaper = strings.NewReplacer(
"_", "\\_",
"*", "\\*",
"[", "\\[",
"]", "\\]",
"(", "\\(",
")", "\\)",
"~", "\\~",
"`", "\\`",
">", "\\>",
"#", "\\#",
"+", "\\+",
"-", "\\-",
"=", "\\=",
"|", "\\|",
"{", "\\{",
"}", "\\}",
".", "\\.",
"!", "\\!",
)
func escapeMarkdown(value string) string {
return markdownEscaper.Replace(value)
}
func escapeMarkdownV2(value string) string {
return markdownV2Escaper.Replace(value)
}