WIP my account page

frontend/src/components/AddEmailForm.tsx

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+// Copyright 2023 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import React, { useRef, useTransition } from "react";
+import { atomWithMutation } from "jotai-urql";
+import { useAtom } from "jotai";
+import { graphql } from "../gql";
+import Button from "./Button";
+import UserEmail from "./UserEmail";
+import Input from "./Input";
+import Typography from "./Typography";
+
+const ADD_EMAIL_MUTATION = graphql(/* GraphQL */ `
+  mutation AddEmail($userId: ID!, $email: String!) {
+    addEmail(input: { userId: $userId, email: $email }) {
+      status
+      email {
+        id
+        ...UserEmail_email
+      }
+    }
+  }
+`);
+
+const addUserEmailAtom = atomWithMutation(ADD_EMAIL_MUTATION);
+
+const AddEmailForm: React.FC<{ userId: string }> = ({ userId }) => {
+  const formRef = useRef<HTMLFormElement>(null);
+  const [addEmailResult, addEmail] = useAtom(addUserEmailAtom);
+  const [pending, startTransition] = useTransition();
+
+  const handleSubmit = (e: React.FormEvent<HTMLFormElement>) => {
+    e.preventDefault();
+    const email = e.currentTarget.email.value;
+    startTransition(() => {
+      addEmail({ userId, email }).then(() => {
+        if (formRef.current) {
+          formRef.current.reset();
+        }
+      });
+    });
+  };
+
+  return (
+    <>
+      {addEmailResult.data?.addEmail.status === "ADDED" && (
+        <>
+          <div className="p-4">
+            <Typography variant="subtitle">Email added!</Typography>
+          </div>
+          <UserEmail email={addEmailResult.data?.addEmail.email} />
+        </>
+      )}
+      {addEmailResult.data?.addEmail.status === "EXISTS" && (
+        <>
+          <div className="p-4">
+            <Typography variant="subtitle">Email already exists!</Typography>
+          </div>
+          <UserEmail email={addEmailResult.data?.addEmail.email} />
+        </>
+      )}
+      <form className="flex" onSubmit={handleSubmit} ref={formRef}>
+        <Input
+          className="flex-1 mr-2"
+          disabled={pending}
+          type="text"
+          name="email"
+        />
+        <Button disabled={pending} type="submit">
+          Add
+        </Button>
+      </form>
+    </>
+  );
+};
+
+export default AddEmailForm;