1 files changed, 26 insertions, 0 deletions
diff --git a/functions/validate.js b/functions/validate.js
index ecf90564..3e9ff111 100644
--- a/functions/validate.js
+++ b/functions/validate.js
@@ -15,6 +15,32 @@ function validateAuthorization(auth) {
   }
 }
 
+var emailRegex = /^[-!#$%&'*+\/0-9=?A-Z^_a-z{|}~](\.?[-!#$%&'*+\/0-9=?A-Z^_a-z`{|}~])*@[a-zA-Z0-9](-*\.?[a-zA-Z0-9])*\.[a-zA-Z](-?[a-zA-Z0-9])+$/;
+
+function isEmailValid(email) {
+    if (!email)
+        return false;
+
+    if(email.length>254)
+        return false;
+
+    var valid = emailRegex.test(email);
+    if(!valid)
+        return false;
+
+    // Further checking of some things regex can't handle
+    var parts = email.split("@");
+    if(parts[0].length>64)
+        return false;
+
+    var domainParts = parts[1].split(".");
+    if(domainParts.some(function(part) { return part.length>63; }))
+        return false;
+
+    return true;
+}
+
 module.exports = {
   validateAuthorization,
+  isEmailValid
 };