mail: organize utils in namespace-like object. no logging cause.

1 files changed, 22 insertions, 2 deletions

diff --git a/deno/base/lib.ts b/deno/base/lib.ts
index a5e4a6a..3c69e0a 100644
--- a/deno/base/lib.ts
+++ b/deno/base/lib.ts
@@ -1,10 +1,30 @@
-export function camelCaseToKebabCase(str: string): string {
+function camelCaseToKebabCase(str: string): string {
   return str.replace(/[A-Z]/g, (m) => "-" + m.toLowerCase());
 }
 
-export function toFileNameString(date: Date, dateOnly?: boolean): string {
+function prependNonEmpty<T>(
+  object: T,
+  prefix: string = " ",
+): string {
+  if (object == null) return "";
+  const string = typeof object === "string" ? object : String(object);
+  return string.length === 0 ? "" : prefix + string;
+}
+
+export const StringUtils = Object.freeze({
+  camelCaseToKebabCase,
+  prependNonEmpty,
+});
+
+function toFileNameString(date: Date, dateOnly?: boolean): string {
   const str = date.toISOString();
   return dateOnly === true
     ? str.slice(0, str.indexOf("T"))
     : str.replaceAll(/:|\./g, "-");
 }
+
+export const DateUtils = Object.freeze(
+  {
+    toFileNameString,
+  } as const,
+);