Merge pull request #3

[API] Validate Email Unicode Ranges

api/functions/index.js

@@ -1,10 +1,27 @@
-const functions = require('firebase-functions');
-
-// // Create and Deploy Your First Cloud Functions
-// // https://firebase.google.com/docs/functions/write-firebase-functions
-//
- exports.emailValidation = functions.https.onRequest((request, response) => {
-    response.status(200).json({
-        message: 'It worked!'
-    })
-   });
+const functions = require("firebase-functions");
+const unicodeRange = require("unicode-range");
+
+exports.emailValidation = functions.https.onRequest((request, response) => {
+
+  var email = request.query.email.toString();
+
+  var getRange = c => unicodeRange("U+" + c.charCodeAt(0).toString(16));
+  var range = getRange(email);
+  var isConsistent = ![...email].some(c => getRange(c) !== range);
+
+  var rangesRTL = [
+    "Arabic",
+    "Imperial Aramaic",
+    "Old Turkic",
+    "Hebrew",
+    "Old Persian"
+  ];
+  var isRTL = rangesRTL.some(r => r === range)
+
+  response.json({
+    range: isConsistent ? range : "MIXED",
+    isRTL: isConsistent ? isRTL : "MIXED",
+    isConsistent
+  });
+
+});