1 files changed, 36 insertions, 0 deletions
diff --git a/services/docker/mail-server/relay/util.ts b/services/docker/mail-server/relay/util.ts
new file mode 100644
index 0000000..3f7f989
--- /dev/null
+++ b/services/docker/mail-server/relay/util.ts
@@ -0,0 +1,36 @@
+declare global {
+  interface Date {
+    toFileNameString(dateOnly?: boolean): string;
+  }
+}
+
+Object.defineProperty(Date.prototype, "toFileNameString", {
+  value: function (dateOnly?: boolean) {
+    const str = (this as Date).toISOString();
+    return dateOnly === true
+      ? str.slice(0, str.indexOf("T"))
+      : str.replaceAll(/:|\./g, "-");
+  },
+});
+
+export function transformProperties<T extends object, N>(
+  object: T,
+  transformer: (value: T[keyof T], key: keyof T) => N,
+): { [k in keyof T]: N } {
+  return Object.fromEntries(
+    Object.entries(object).map((
+      [k, v],
+    ) => [k, transformer(v, k as keyof T)]),
+  ) as { [k in keyof T]: N };
+}
+
+export function withDefaults<T extends object>(
+  partial: Partial<T> | null | undefined,
+  defaults: T,
+): T {
+  const result: Record<PropertyKey, unknown> = {};
+  for (const [key, value] of Object.entries(defaults)) {
+    result[key] = partial?.[key as keyof T] ?? value;
+  }
+  return result as T;
+}