Add SMTP admin settings and contact form delivery

lib/mail-settings.ts

@@ -0,0 +1,133 @@
+export const MAIL_SETTINGS_KEY = "mail_settings";
+
+export type MailSettings = {
+  smtp: {
+    host: string;
+    port: number;
+    secure: boolean;
+    username: string;
+    password: string;
+  };
+  sender: {
+    email: string;
+    name: string;
+  };
+  recipients: {
+    contact: string;
+    test: string;
+  };
+};
+
+export type MailSettingsFormValues = {
+  smtp: {
+    host: string;
+    port: number;
+    secure: boolean;
+    username: string;
+    password: string;
+    hasPassword: boolean;
+  };
+  sender: {
+    email: string;
+    name: string;
+  };
+  recipients: {
+    contact: string;
+    test: string;
+  };
+};
+
+export function buildDefaultMailSettings(): MailSettings {
+  return {
+    smtp: {
+      host: "",
+      port: 587,
+      secure: false,
+      username: "",
+      password: "",
+    },
+    sender: {
+      email: "",
+      name: "",
+    },
+    recipients: {
+      contact: "",
+      test: "",
+    },
+  };
+}
+
+function normalizeMailSettings(input: unknown): MailSettings {
+  const value = input && typeof input === "object" ? (input as Record<string, unknown>) : {};
+  const smtp = value.smtp && typeof value.smtp === "object"
+    ? (value.smtp as Record<string, unknown>)
+    : {};
+  const sender = value.sender && typeof value.sender === "object"
+    ? (value.sender as Record<string, unknown>)
+    : {};
+  const recipients = value.recipients && typeof value.recipients === "object"
+    ? (value.recipients as Record<string, unknown>)
+    : {};
+  const defaults = buildDefaultMailSettings();
+  const parsedPort =
+    typeof smtp.port === "number"
+      ? smtp.port
+      : typeof smtp.port === "string"
+        ? Number.parseInt(smtp.port, 10)
+        : defaults.smtp.port;
+
+  return {
+    smtp: {
+      host: typeof smtp.host === "string" ? smtp.host.trim() : defaults.smtp.host,
+      port: Number.isFinite(parsedPort) && parsedPort > 0 ? parsedPort : defaults.smtp.port,
+      secure: Boolean(smtp.secure),
+      username: typeof smtp.username === "string" ? smtp.username.trim() : defaults.smtp.username,
+      password: typeof smtp.password === "string" ? smtp.password : defaults.smtp.password,
+    },
+    sender: {
+      email: typeof sender.email === "string" ? sender.email.trim() : defaults.sender.email,
+      name: typeof sender.name === "string" ? sender.name.trim() : defaults.sender.name,
+    },
+    recipients: {
+      contact:
+        typeof recipients.contact === "string"
+          ? recipients.contact.trim()
+          : defaults.recipients.contact,
+      test:
+        typeof recipients.test === "string" ? recipients.test.trim() : defaults.recipients.test,
+    },
+  };
+}
+
+export function parseMailSettingsValue(rawValue: string | null | undefined): MailSettings {
+  if (!rawValue) {
+    return buildDefaultMailSettings();
+  }
+
+  try {
+    return normalizeMailSettings(JSON.parse(rawValue));
+  } catch {
+    return buildDefaultMailSettings();
+  }
+}
+
+export function toMailSettingsFormValues(settings: MailSettings): MailSettingsFormValues {
+  return {
+    smtp: {
+      host: settings.smtp.host,
+      port: settings.smtp.port,
+      secure: settings.smtp.secure,
+      username: settings.smtp.username,
+      password: "",
+      hasPassword: Boolean(settings.smtp.password),
+    },
+    sender: {
+      email: settings.sender.email,
+      name: settings.sender.name,
+    },
+    recipients: {
+      contact: settings.recipients.contact,
+      test: settings.recipients.test,
+    },
+  };
+}