fix: add support for SendGrid categories and streamline SendGrid dete…

firestore-send-email/POSTINSTALL.md

@@ -40,6 +40,28 @@ admin
 
 See the [official documentation](https://firebase.google.com/docs/extensions/official/firestore-send-email) for information on using this extension, including advanced use cases such as using Handlebars templates and managing email delivery status.
 
+#### Firestore-Send-Email: SendGrid Categories
+
+When using SendGrid (`SMTP_CONNECTION_URI` includes `sendgrid.net`), you can assign categories to your emails.
+
+## Example JSON with Categories:
+```json
+{
+  "to": ["[email protected]"],
+  "categories": ["Example_Category"],
+  "message": {
+    "subject": "Test Email with Categories",
+    "text": "This is a test email to see if categories work.",
+    "html": "<strong>This is a test email to see if categories work.</strong>"
+  }
+}
+```
+
+Add this document to the Firestore mail collection to send categorized emails.
+
+For more details, see the [SendGrid Categories documentation](https://docs.sendgrid.com/ui/sending-email/categories).
+
+
 ### Monitoring
 
 As a best practice, you can [monitor the activity](https://firebase.google.com/docs/extensions/manage-installed-extensions#monitor) of your installed extension, including checks on its health, usage, and logs.

firestore-send-email/PREINSTALL.md

@@ -18,6 +18,27 @@ You can also optionally configure this extension to render emails using [Handleb
 
 When you configure this extension, you'll need to supply your **SMTP credentials for mail delivery**. Note that this extension is for use with bulk email service providers, like SendGrid, Mailgun, etc.
 
+#### Firestore-Send-Email: SendGrid Categories
+
+When using SendGrid (`SMTP_CONNECTION_URI` includes `sendgrid.net`), you can assign categories to your emails.
+
+## Example JSON with Categories:
+```json
+{
+  "to": ["[email protected]"],
+  "categories": ["Example_Category"],
+  "message": {
+    "subject": "Test Email with Categories",
+    "text": "This is a test email to see if categories work.",
+    "html": "<strong>This is a test email to see if categories work.</strong>"
+  }
+}
+```
+
+Add this document to the Firestore mail collection to send categorized emails.
+
+For more details, see the [SendGrid Categories documentation](https://docs.sendgrid.com/ui/sending-email/categories).
+
 #### Setup Google App Passwords
 
 **Google** no longer allows **Gmail** users to use their own passwords to authorize third-party apps and services. Instead, you have to use the [Sign in with App Passwords](https://support.google.com/accounts/answer/185833) service to generate a special password for each app you want to authorize. To do so:

firestore-send-email/README.md

@@ -26,6 +26,27 @@ You can also optionally configure this extension to render emails using [Handleb
 
 When you configure this extension, you'll need to supply your **SMTP credentials for mail delivery**. Note that this extension is for use with bulk email service providers, like SendGrid, Mailgun, etc.
 
+#### Firestore-Send-Email: SendGrid Categories
+
+When using SendGrid (`SMTP_CONNECTION_URI` includes `sendgrid.net`), you can assign categories to your emails.
+
+## Example JSON with Categories:
+```json
+{
+  "to": ["[email protected]"],
+  "categories": ["Example_Category"],
+  "message": {
+    "subject": "Test Email with Categories",
+    "text": "This is a test email to see if categories work.",
+    "html": "<strong>This is a test email to see if categories work.</strong>"
+  }
+}
+```
+
+Add this document to the Firestore mail collection to send categorized emails.
+
+For more details, see the [SendGrid Categories documentation](https://docs.sendgrid.com/ui/sending-email/categories).
+
 #### Setup Google App Passwords
 
 **Google** no longer allows **Gmail** users to use their own passwords to authorize third-party apps and services. Instead, you have to use the [Sign in with App Passwords](https://support.google.com/accounts/answer/185833) service to generate a special password for each app you want to authorize. To do so:

firestore-send-email/functions/__tests__/helpers.test.ts

@@ -1,7 +1,7 @@
 import Mail = require("nodemailer/lib/mailer");
 const { logger } = require("firebase-functions");
 
-import { setSmtpCredentials } from "../src/helpers";
+import { setSmtpCredentials, isSendGrid } from "../src/helpers";
 import { Config } from "../src/types";
 
 const consoleLogSpy = jest.spyOn(logger, "warn").mockImplementation();
@@ -11,7 +11,7 @@ const regex = new RegExp(
   "^(smtp[s]*://(.*?(:[^:@]*)?@)?[^:@]+:[0-9]+(\\?[^ ]*)?)$"
 );
 
-describe("set server credentials helper function", () => {
+describe("setSmtpCredentials function", () => {
   test("return smtpServerDomain credentials with new password", () => {
     const config: Config = {
       smtpConnectionUri:
@@ -32,26 +32,7 @@ describe("set server credentials helper function", () => {
     expect(regex.test(config.smtpConnectionUri)).toBe(true);
   });
 
-  test("return smtpServerDomain credentials with new password (old deleted)", () => {
-    const config: Config = {
-      smtpConnectionUri: "smtps://[email protected]@smtp.gmail.com:465",
-      smtpPassword: "sec#:@ret-password",
-      location: "",
-      mailCollection: "",
-      defaultFrom: "",
-    };
-    const credentials = setSmtpCredentials(config);
-    expect(credentials).toBeInstanceOf(Mail);
-    expect(credentials.options.port).toBe(465);
-    expect(credentials.options.host).toBe("smtp.gmail.com");
-    expect(credentials.options.auth.pass).toBe(config.smtpPassword);
-    expect(credentials.options.secure).toBe(true);
-
-    // The regex should match the smtpConnectionUri, it should be valid
-    expect(regex.test(config.smtpConnectionUri)).toBe(true);
-  });
-
-  test("return smtpConnectionUri credentials with old password", () => {
+  test("return smtpServerDomain credentials with old password", () => {
     const config: Config = {
       smtpConnectionUri:
         "smtps://[email protected]:[email protected]:465",
@@ -130,7 +111,7 @@ describe("set server credentials helper function", () => {
     expect(regex.test(config.smtpConnectionUri)).toBe(true);
   });
 
-  test("return valid smtpConnectionUri credentials with special chars in password config", () => {
+  test("return valid smtpConnectionUri credentials with valid special chars in password", () => {
     const config: Config = {
       smtpConnectionUri:
         "smtp://[email protected]@smtp.gmail.com:465?pool=true&service=gmail",
@@ -176,7 +157,7 @@ describe("set server credentials helper function", () => {
     expect(regex.test(config.smtpConnectionUri)).toBe(true);
   });
 
-  test("return invalid smtpConnectionUri credentials with invalid special chars in connectionUri password", () => {
+  test("throw error for invalid smtpConnectionUri", () => {
     const config: Config = {
       smtpConnectionUri:
         "smtp://[email protected]:4,h?dhuNTbv9zMrP4&7&7%*[email protected]:465?pool=true&service=gmail",
@@ -185,48 +166,64 @@ describe("set server credentials helper function", () => {
       defaultFrom: "",
     };
 
-    // Expect an error to be thrown
     expect(() => setSmtpCredentials(config)).toThrow(Error);
-
     expect(consoleLogSpy).toBeCalledWith(
       "Invalid URI: please reconfigure with a valid SMTP connection URI"
     );
   });
-  test("return valid smtpConnectionUri credentials with correct seprator", () => {
+});
+
+describe("isSendGrid function", () => {
+  test("return true for SendGrid SMTP URI", () => {
     const config: Config = {
-      smtpConnectionUri:
-        "smtp://[email protected]:4,h?dhuNTbv9zMrP4&7&7%*[email protected]:465?pool=true&service=gmail",
+      smtpConnectionUri: "smtps://[email protected]:465",
       location: "",
       mailCollection: "",
       defaultFrom: "",
     };
 
-    expect(regex.test(config.smtpConnectionUri)).toBe(true);
+    expect(isSendGrid(config)).toBe(true);
   });
 
-  test("return invalid smtpConnectionUri credentials with invalid seprator", () => {
+  test("return false for non-SendGrid SMTP URI", () => {
     const config: Config = {
       smtpConnectionUri:
-        "smtp://[email protected]:4,h?dhuNTbv9zMrP4&7&7%*3:smtp.gmail.com:465?pool=true&service=gmail",
+        "smtps://[email protected]:secret-password@smtp.gmail.com:465",
       location: "",
       mailCollection: "",
       defaultFrom: "",
     };
 
-    expect(regex.test(config.smtpConnectionUri)).toBe(false);
+    expect(isSendGrid(config)).toBe(false);
   });
+});
 
-  /* Test removed due to the new SendGrid transporter logic - see setSendGridTransport()
-  test("return a SendGrid transporter if the host is smtp.sendgrid.net", () => {
-    const config: Config = {
-      smtpConnectionUri: "smtps://apikey@smtp.sendgrid.net:465",
-      location: "",
-      mailCollection: "",
-      defaultFrom: "",
-    };
+test("return invalid smtpConnectionUri credentials with invalid separator", () => {
+  const config: Config = {
+    smtpConnectionUri:
+      "smtp://[email protected]:4,h?dhuNTbv9zMrP4&7&7%*3:smtp.gmail.com:465?pool=true&service=gmail",
+    location: "",
+    mailCollection: "",
+    defaultFrom: "",
+  };
 
-    const credentials = setSmtpCredentials(config);
-    expect(credentials.transporter.name === "nodemailer-sendgrid").toBe(true);
-  });
-  */
+  expect(regex.test(config.smtpConnectionUri)).toBe(false);
+});
+
+test("correctly detects SendGrid SMTP URI", () => {
+  const config: Config = {
+    smtpConnectionUri: "smtps://[email protected]:465",
+    location: "",
+    mailCollection: "",
+    defaultFrom: "",
+  };
+  expect(isSendGrid(config)).toBe(true);
+
+  const invalidConfig: Config = {
+    smtpConnectionUri: "smtps://[email protected]:465",
+    location: "",
+    mailCollection: "",
+    defaultFrom: "",
+  };
+  expect(isSendGrid(invalidConfig)).toBe(false);
 });