Refactor admin area and remove legacy root paths

app/_admin/smtp/actions.ts

@@ -0,0 +1,115 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+import { isRedirectError } from "next/dist/client/components/redirect-error";
+
+import { toInternalAdminPath } from "@/lib/admin-routing";
+import { clearAdminSessionCookie, isAdminAuthenticated } from "@/lib/admin-auth";
+import { isCheckedFormValue } from "@/lib/form-data";
+import {
+  getMailSettings,
+  updateMailSettings,
+} from "@/lib/app-config";
+import { sendTestEmail } from "@/lib/mail";
+import type { MailSettings } from "@/lib/mail-settings";
+
+async function ensureAdmin() {
+  if (!(await isAdminAuthenticated())) {
+    await clearAdminSessionCookie();
+    redirect("/");
+  }
+}
+
+function withMessage(pathname: string, type: "success" | "error", message: string) {
+  const params = new URLSearchParams();
+  params.set(type, message);
+
+  return `${pathname}?${params.toString()}`;
+}
+
+function parsePort(value: string) {
+  const port = Number.parseInt(value, 10);
+
+  if (!Number.isInteger(port) || port <= 0) {
+    throw new Error("SMTP port must be a positive number.");
+  }
+
+  return port;
+}
+
+function parseMailSettingsFormData(
+  formData: FormData,
+  existingSettings: MailSettings,
+): MailSettings {
+  const host = String(formData.get("smtpHost") ?? "").trim();
+  const portValue = String(formData.get("smtpPort") ?? "").trim();
+  const username = String(formData.get("smtpUsername") ?? "").trim();
+  const password = String(formData.get("smtpPassword") ?? "");
+  const fromEmail = String(formData.get("mailFromEmail") ?? "").trim();
+  const fromName = String(formData.get("mailFromName") ?? "").trim();
+  const contactRecipient = String(formData.get("mailContactRecipient") ?? "").trim();
+  const testRecipient = String(formData.get("mailTestRecipient") ?? "").trim();
+
+  return {
+    smtp: {
+      host,
+      port: parsePort(portValue || String(existingSettings.smtp.port)),
+      secure: isCheckedFormValue(formData.get("smtpSecure")),
+      username,
+      password: password.trim() ? password : existingSettings.smtp.password,
+    },
+    sender: {
+      email: fromEmail,
+      name: fromName,
+    },
+    recipients: {
+      contact: contactRecipient,
+      test: testRecipient,
+    },
+  };
+}
+
+export async function saveMailSettingsAction(formData: FormData) {
+  await ensureAdmin();
+
+  try {
+    const existingMailSettings = await getMailSettings();
+    const nextMailSettings = parseMailSettingsFormData(formData, existingMailSettings);
+
+    await updateMailSettings(nextMailSettings);
+    revalidatePath(toInternalAdminPath("/smtp"));
+    redirect(withMessage("/smtp", "success", "SMTP Einstellungen gespeichert."));
+  } catch (error) {
+    if (isRedirectError(error)) {
+      throw error;
+    }
+
+    const message =
+      error instanceof Error
+        ? error.message
+        : "SMTP Einstellungen konnten nicht gespeichert werden.";
+
+    redirect(withMessage("/smtp", "error", message));
+  }
+}
+
+export async function sendTestEmailAction() {
+  await ensureAdmin();
+
+  try {
+    await sendTestEmail();
+    redirect(withMessage("/smtp", "success", "Test-E-Mail gesendet."));
+  } catch (error) {
+    if (isRedirectError(error)) {
+      throw error;
+    }
+
+    const message =
+      error instanceof Error
+        ? error.message
+        : "Test-E-Mail konnte nicht gesendet werden.";
+
+    redirect(withMessage("/smtp", "error", message));
+  }
+}