refactor invite to its own route and controller

Server/db/mongo/modules/inviteModule.js

@@ -2,15 +2,25 @@ const InviteToken = require("../../../models/InviteToken");
 const crypto = require("crypto");
 const { errorMessages } = require("../../../utils/messages");
 
-const requestInviteToken = async (req, res) => {
+/**
+ * Request an invite token for a user.
+ *
+ * This function deletes any existing invite tokens for the user's email,
+ * generates a new token, saves it, and then returns the new token.
+ *
+ * @param {Object} userData - The user data.
+ * @param {string} userData.email - The user's email.
+ * @param {mongoose.Schema.Types.ObjectId} userData.teamId - The ID of the team.
+ * @param {Array} userData.role - The user's role(s).
+ * @param {Date} [userData.expiry=Date.now] - The expiry date of the token. Defaults to the current date and time.
+ * @returns {Promise<InviteToken>} The invite token.
+ * @throws {Error} If there is an error.
+ */
+const requestInviteToken = async (userData) => {
   try {
-    await InviteToken.deleteMany({ email: req.body.email });
-    let inviteToken = new InviteToken({
-      email: req.body.email,
-      role: req.body.role,
-      teamId: req.body.teamId,
-      token: crypto.randomBytes(32).toString("hex"),
-    });
+    await InviteToken.deleteMany({ email: userData.email });
+    userData.token = crypto.randomBytes(32).toString("hex");
+    let inviteToken = new InviteToken(userData);
     await inviteToken.save();
     return inviteToken;
   } catch (error) {
@@ -18,10 +28,20 @@ const requestInviteToken = async (req, res) => {
   }
 };
 
-const getInviteToken = async (req, res) => {
+/**
+ * Retrieves and deletes an invite token.
+ *
+ * This function searches for an invite token in the database and deletes it.
+ * If the invite token is not found, it throws an error.
+ *
+ * @param {string} token - The invite token to search for.
+ * @returns {Promise<InviteToken>} The invite token data.
+ * @throws {Error} If the invite token is not found or there is another error.
+ */
+const getInviteToken = async (token) => {
   try {
     const invite = await InviteToken.findOneAndDelete({
-      token: req.body.token,
+      token,
     });
     if (invite === null) {
       throw new Error(errorMessages.AUTH_INVITE_NOT_FOUND);