IO-2920 Refactor fee discounting to use API to check.

server/intellipay/intellipay.js

@@ -149,6 +149,52 @@ exports.generate_payment_url = async (req, res) => {
   }
 };
 
+//Reference: https://intellipay.com/dist/webapi26.html#operation/fee
+exports.checkfee = async (req, res) => {
+  logger.log("intellipay-fee-check", "DEBUG", req.user?.email, null, null);
+
+  //If there's no amount, there can't be a fee. Skip the call.
+  if (!req.body.amount || req.body.amount <= 0) {
+    res.json({ fee: 0 });
+    return;
+  }
+
+  const shopCredentials = await getShopCredentials(req.body.bodyshop);
+
+  try {
+    const options = {
+      method: "POST",
+      headers: { "content-type": "application/x-www-form-urlencoded" },
+      //TODO: Move these to environment variables/database.
+      data: qs.stringify(
+        {
+          method: "fee",
+          ...shopCredentials,
+          amount: req.body.amount,
+          paymenttype: `"CC"`
+        },
+        { sort: false } //ColdFusion Query Strings depend on order. This preserves it.
+      ),
+      url: `https://${domain}.cpteller.com/api/26/webapi.cfc`
+    };
+
+    const response = await axios(options);
+    if (response.data?.error) {
+      res.status(400).json({ error: response.data.error });
+    } else if (response.data < 0) {
+      res.json({ error: "Fee amount negative. Check API credentials & account configuration." });
+    } else {
+      res.json({ fee: response.data });
+    }
+  } catch (error) {
+    //console.log(error);
+    logger.log("intellipay-fee-check-error", "ERROR", req.user?.email, null, {
+      error: error.message
+    });
+    res.status(400).json({ error });
+  }
+};
+
 exports.postback = async (req, res) => {
   try {
     logger.log("intellipay-postback", "DEBUG", req.user?.email, null, req.body);

server/routes/intellipayRoutes.js

@@ -1,11 +1,12 @@
 const express = require("express");
 const router = express.Router();
 const validateFirebaseIdTokenMiddleware = require("../middleware/validateFirebaseIdTokenMiddleware");
-const { lightbox_credentials, payment_refund, generate_payment_url, postback } = require("../intellipay/intellipay");
+const { lightbox_credentials, payment_refund, generate_payment_url, postback, checkfee } = require("../intellipay/intellipay");
 
 router.post("/lightbox_credentials", validateFirebaseIdTokenMiddleware, lightbox_credentials);
 router.post("/payment_refund", validateFirebaseIdTokenMiddleware, payment_refund);
 router.post("/generate_payment_url", validateFirebaseIdTokenMiddleware, generate_payment_url);
+router.post("/checkfee", validateFirebaseIdTokenMiddleware, checkfee);
 router.post("/postback", postback);
 
 module.exports = router;