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

3 files changed, 27 insertions, 5 deletions

diff --git a/deno/base/config.ts b/deno/base/config.ts
index a5f5d86..96cc869 100644
--- a/deno/base/config.ts
+++ b/deno/base/config.ts
@@ -1,4 +1,4 @@
-import { camelCaseToKebabCase } from "./lib.ts";
+import { StringUtils } from "./lib.ts";
 
 export interface ConfigDefinitionItem {
   readonly description: string;
@@ -29,7 +29,9 @@ export class ConfigProvider<K extends string> {
       for (const [key, def] of Object.entries(definition as ConfigDefinition)) {
         map[key] = {
           ...def,
-          env: `${this.#prefix}-${camelCaseToKebabCase(key as string)}`
+          env: `${this.#prefix}-${
+            StringUtils.camelCaseToKebabCase(key as string)
+          }`
             .replaceAll("-", "_")
             .toUpperCase(),
         };
diff --git a/deno/base/deno.json b/deno/base/deno.json
index 52baaa5..582f0f6 100644
--- a/deno/base/deno.json
+++ b/deno/base/deno.json
@@ -4,6 +4,6 @@
   "exports": {
     ".": "./lib.ts",
     "./config": "./config.ts",
-    "./cron": "./cron.ts",
+    "./cron": "./cron.ts"
   }
 }
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,
+);