(new): rich message support

(fix): runtime reliability
(tests): regression coverage
(doc): v1.1 release notes

tgrich/utils.go

@@ -0,0 +1,41 @@
+package tgrich
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+)
+
+func escapeHTML(s string) string {
+	s = strings.ReplaceAll(s, "&", "&")
+	s = strings.ReplaceAll(s, "<", "&lt;")
+	s = strings.ReplaceAll(s, ">", "&gt;")
+	s = strings.ReplaceAll(s, `"`, "&quot;")
+	return s
+}
+func formatAttrs(attrs map[string]string) []string {
+	out := make([]string, 0, len(attrs))
+	for k, v := range attrs {
+		if v == "" {
+			out = append(out, k)
+			continue
+		}
+		out = append(out, fmt.Sprintf(`%s="%s"`, k, escapeHTML(v)))
+	}
+	sort.Strings(out)
+	return out
+}
+
+func openTag(name string, attrs []string) string {
+	if len(attrs) == 0 {
+		return "<" + name + ">"
+	}
+	return "<" + name + " " + strings.Join(attrs, " ") + ">"
+}
+
+func selfClosingTag(name string, attrs []string) string {
+	if len(attrs) == 0 {
+		return "<" + name + "/>"
+	}
+	return "<" + name + " " + strings.Join(attrs, " ") + "/>"
+}