Fixes and tickets

functions/src/users.js

@@ -1,7 +1,44 @@
 const admin = require("firebase-admin");
-const { onDocumentDeleted } = require("firebase-functions/firestore");
+const {
+  onDocumentDeleted,
+  onDocumentCreated,
+} = require("firebase-functions/firestore");
 const { refList } = require("../index");
 const { deleteFolder } = require("../helpers/firebase");
+const { Resend } = require("resend");
+const { welcomeTemplate } = require("../helpers/email");
+const { RESEND_API_KEY } = require("../config/keys");
+
+const resendClient = new Resend(RESEND_API_KEY);
+const WELCOME_EMAIL_FROM =
+  process.env.RESEND_FROM_EMAIL || "MusicLand <musicland@minuit.app>";
+const WELCOME_EMAIL_SUBJECT = "Bienvenue sur MusicLand";
+
+exports.onUserCreated = onDocumentCreated("users/{userID}", async (event) => {
+  try {
+    const { email = "", firstName = "", lastName = "" } = event?.data?.data();
+    if (email) {
+      if (!resendClient) {
+        console.warn("Resend API key not configured; skipping welcome email.");
+        return;
+      }
+      try {
+        await resendClient.emails.send({
+          from: WELCOME_EMAIL_FROM,
+          to: [email],
+          subject: WELCOME_EMAIL_SUBJECT,
+          html: welcomeTemplate({ firstName, lastName }),
+        });
+      } catch (error) {
+        console.log("Failed to send welcome email:", error);
+      }
+    } else {
+      throw new Error("User created with empty email");
+    }
+  } catch (e) {
+    console.log(e);
+  }
+});
 
 exports.onUserDelete = onDocumentDeleted("users/{userID}", async (event) => {
   try {