fix: contact form

src/pages/contact.tsx

@@ -37,10 +37,28 @@ const Contact: React.FC<PageProps<DataProps>> = ({ data, location }) => {
 
   const [name, setName] = useState<string>()
   const [email, setEmail] = useState<string>()
+  const [emailError, setEmailError] = useState<boolean>(false)
   const [subject, setSubject] = useState<string>()
   const [message, setMessage] = useState<string>()
   const [notification, setNotification] = useState<string>()
 
+  const handleEmailChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const value = e.target.value
+    setEmail(value)
+
+    if (
+      value &&
+      (value.toLowerCase().includes('@gmail.com') ||
+        value.toLowerCase().includes('@googlemail.com'))
+    ) {
+      setEmailError(true)
+      setNotification('Gmail addresses are not allowed.')
+    } else {
+      setEmailError(false)
+      setNotification(undefined)
+    }
+  }
+
   const getBorderStyle = (value: string | undefined) =>
     value === undefined ? {} : value ? {} : { border: '1px solid red' }
 
@@ -66,6 +84,11 @@ const Contact: React.FC<PageProps<DataProps>> = ({ data, location }) => {
               onSubmit={async (evt) => {
                 evt.preventDefault()
 
+                // Prevent sending if emailError is set
+                if (emailError) {
+                  return
+                }
+
                 if (name && email && subject && message) {
                   const res = await nostrController
                     .sendDM(
@@ -121,10 +144,7 @@ Message: ${message}`
                   name="email"
                   rules="required|email"
                   aria-describedby="emailHelp"
-                  onChange={(evt) => {
-                    setEmail(evt.target.value)
-                    setNotification(undefined)
-                  }}
+                  onChange={handleEmailChange}
                   style={getBorderStyle(email)}
                 />
                 <div id="emailHelp" className="form-text">