+ contact requests

api/notification/internal/server/notificationimp/telegram/message.go

@@ -0,0 +1,100 @@
+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)
+}