feat(infisical-pg): completed signup, login, password and backup key migration

backend-pg/src/services/smtp/smtp-service.ts

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+import fs from "node:fs/promises";
+import path from "node:path";
+import handlebars from "handlebars";
+import { createTransport } from "nodemailer";
+import SMTPTransport from "nodemailer/lib/smtp-transport";
+
+import { logger } from "@app/lib/logger";
+
+export type TSmtpConfig = SMTPTransport.Options;
+export type TSmtpSendMail = {
+  template: SmtpTemplates;
+  subjectLine: string;
+  recipients: string[];
+  substitutions: unknown;
+};
+export type TSmtpService = ReturnType<typeof smtpServiceFactory>;
+
+export enum SmtpTemplates {
+  EmailVerification = "emailVerification.handlebars",
+  EmailMfa = "emailMfa.handlebars",
+  HistoricalSecretList = "historicalSecretLeakIncident.handlebars",
+  NewDeviceJoin = "newDevice.handlebars",
+  OrgInvite = "organizationInvitation.handlebars",
+  ResetPassword = "passwordReset.handlebars",
+  SecretLeakIncident = "secretLeakIncident.handlebars",
+  WorkspaceInvite = "workspaceInvitation.handlebars"
+}
+
+export enum SmtpHost {
+  Sendgrid = "smtp.sendgrid.net",
+  Mailgun = "smtp.mailgun.org",
+  SocketLabs = "smtp.sockerlabs.com",
+  Zohomail = "smtp.zoho.com",
+  Gmail = "smtp.gmail.com",
+  Office365 = "smtp.office365.com"
+}
+
+const getTlsOption = (host?: SmtpHost | string, secure?: boolean) => {
+  if (!secure) return { secure: false };
+  if (!host) return { secure: true };
+
+  if (host === SmtpHost.Sendgrid) {
+    return { requireTLS: true };
+  }
+  if (host.includes("amazonaws.com")) {
+    return { tls: { ciphers: "TLSv1.2" } };
+  }
+  return { requireTLS: true, tls: { ciphers: "TLSv1.2" } };
+};
+
+export const smtpServiceFactory = (cfg: TSmtpConfig) => {
+  const smtp = createTransport({ ...cfg, ...getTlsOption(cfg.host, cfg.secure) });
+  const isSmtpOn = Boolean(cfg.host);
+
+  const sendMail = async ({ substitutions, recipients, template, subjectLine }: TSmtpSendMail) => {
+    const html = await fs.readFile(path.resolve(__dirname, "./templates/", template), "utf8");
+    const temp = handlebars.compile(html);
+    const htmlToSend = temp(substitutions);
+    if (isSmtpOn) {
+      await smtp.sendMail({
+        from: cfg.from,
+        to: recipients.join(", "),
+        subject: subjectLine,
+        html: htmlToSend
+      });
+    } else {
+      logger.info("SMTP is not configured. Outputting it in terminal");
+      logger.info({
+        from: cfg.from,
+        to: recipients.join(", "),
+        subject: subjectLine,
+        html: htmlToSend
+      });
+    }
+  };
+
+  return { sendMail };
+};