[SMTP] Log template size (#1612)

* Log template size

* Add changeset

* format to kb

* Improve logging and add test

.changeset/popular-cars-hunt.md

@@ -0,0 +1,5 @@
+---
+"smtp": patch
+---
+
+Processing webhook now logs the size of email and subject template

apps/smtp/src/lib/bytes-to-kb.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from "vitest";
+
+import { bytesToKb } from "./bytes-to-kb";
+
+describe("bytesToKb", () => {
+  it("should convert bytes to kb", () => {
+    expect(bytesToKb(1024)).toBe(1);
+    expect(bytesToKb(2048)).toBe(2);
+    expect(bytesToKb(3072)).toBe(3);
+    expect(bytesToKb(34344443)).toBe(33539.5);
+    expect(bytesToKb(43433434343)).toBe(42415463.23);
+    expect(bytesToKb(3434334)).toBe(3353.84);
+  });
+});

apps/smtp/src/lib/bytes-to-kb.ts

@@ -0,0 +1,3 @@
+export function bytesToKb(bytes: number): number {
+  return +(bytes / 1024).toFixed(2);
+}

apps/smtp/src/modules/event-handlers/use-case/send-event-messages.use-case.ts

@@ -1,11 +1,13 @@
+import { err, errAsync, Result, ResultAsync } from "neverthrow";
+
+import { BaseError } from "../../../errors";
+import { bytesToKb } from "../../../lib/bytes-to-kb";
+import { createLogger } from "../../../logger";
+import { SmtpConfiguration } from "../../smtp/configuration/smtp-config-schema";
 import { IGetSmtpConfiguration } from "../../smtp/configuration/smtp-configuration.service";
 import { IEmailCompiler } from "../../smtp/services/email-compiler";
-import { MessageEventTypes } from "../message-event-types";
-import { createLogger } from "../../../logger";
 import { ISMTPEmailSender, SendMailArgs } from "../../smtp/services/smtp-email-sender";
-import { BaseError } from "../../../errors";
-import { err, errAsync, Result, ResultAsync } from "neverthrow";
-import { SmtpConfiguration } from "../../smtp/configuration/smtp-config-schema";
+import { MessageEventTypes } from "../message-event-types";
 
 export class SendEventMessagesUseCase {
   static BaseError = BaseError.subclass("SendEventMessagesUseCaseError");
@@ -134,7 +136,10 @@ export class SendEventMessagesUseCase {
       );
     }
 
-    this.logger.info("Successfully compiled email template");
+    this.logger.info("Successfully compiled email template", {
+      bodyTemplateSizeKb: bytesToKb(new Blob([eventSettings.template]).size),
+      subjectTemplateSizeKb: bytesToKb(new Blob([eventSettings.subject]).size),
+    });
 
     const smtpSettings: SendMailArgs["smtpSettings"] = {
       host: config.smtpHost,