Add undesigned functionality of follow modal. For #1862

web/components/action-buttons/FollowButton.tsx

@@ -1,11 +1,17 @@
 import { Button } from 'antd';
 import { HeartFilled } from '@ant-design/icons';
 import { useState } from 'react';
+import { useRecoilValue } from 'recoil';
 import Modal from '../ui/Modal/Modal';
+import FollowModal from '../modals/Follow/FollowModal';
 import s from './ActionButton.module.scss';
+import { clientConfigStateAtom } from '../stores/ClientConfigStore';
+import { ClientConfig } from '../../interfaces/client-config.model';
 
 export default function FollowButton() {
   const [showModal, setShowModal] = useState(false);
+  const clientConfig = useRecoilValue<ClientConfig>(clientConfigStateAtom);
+  const { name } = clientConfig;
 
   const buttonClicked = () => {
     setShowModal(true);
@@ -21,11 +27,9 @@ export default function FollowButton() {
       >
         Follow
       </Button>
-      <Modal
-        title="Follow <servername>"
-        visible={showModal}
-        handleCancel={() => setShowModal(false)}
-      />
+      <Modal title={`Follow ${name}`} visible={showModal} handleCancel={() => setShowModal(false)}>
+        <FollowModal handleClose={() => setShowModal(false)} />
+      </Modal>
     </>
   );
 }

web/components/modals/Follow/FollowModal.tsx

@@ -0,0 +1,90 @@
+import { Input, Button, Alert, Spin } from 'antd';
+import { useState } from 'react';
+
+const ENDPOINT = '/api/remotefollow';
+
+interface Props {
+  handleClose: () => void;
+}
+
+function validateAccount(a) {
+  const sanitized = a.replace(/^@+/, '');
+  const regex =
+    /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
+  return regex.test(String(sanitized).toLowerCase());
+}
+
+export default function FollowModal(props: Props) {
+  const { handleClose } = props;
+  const [account, setAccount] = useState(null);
+  const [valid, setValid] = useState(false);
+  const [loading, setLoading] = useState(false);
+  const [errorMessage, setErrorMessage] = useState(null);
+
+  const handleAccountChange = a => {
+    setAccount(a);
+    if (validateAccount(a)) {
+      setValid(true);
+    } else {
+      setValid(false);
+    }
+  };
+
+  const remoteFollowButtonPressed = async () => {
+    if (!valid) {
+      return;
+    }
+
+    setLoading(true);
+
+    try {
+      const sanitizedAccount = account.replace(/^@+/, '');
+      const request = { account: sanitizedAccount };
+      const rawResponse = await fetch(ENDPOINT, {
+        method: 'POST',
+        body: JSON.stringify(request),
+      });
+      const result = await rawResponse.json();
+
+      if (result.redirectUrl) {
+        window.open(result.redirectUrl, '_blank');
+        handleClose();
+      }
+      if (!result.success) {
+        setErrorMessage(result.message);
+        setLoading(false);
+        return;
+      }
+      if (!result.redirectUrl) {
+        setErrorMessage('Unable to follow.');
+        setLoading(false);
+        return;
+      }
+    } catch (e) {
+      setErrorMessage(e.message);
+    }
+    setLoading(false);
+  };
+
+  return (
+    <Spin spinning={loading}>
+      {errorMessage && (
+        <Alert message="Follow Error" description={errorMessage} type="error" showIcon />
+      )}
+      <Input
+        value={account}
+        size="large"
+        onChange={e => handleAccountChange(e.target.value)}
+        placeholder="Your fediverse account @account@server"
+        defaultValue={account}
+      />
+      <Button disabled={!valid} onClick={remoteFollowButtonPressed}>
+        Follow
+      </Button>
+      <div>
+        Information about following a Fediverse account and next steps how to create a Fediverse
+        account goes here.
+      </div>
+    </Spin>
+  );
+}

web/components/modals/FollowModal.tsx

@@ -1,6 +0,0 @@
-/* eslint-disable @typescript-eslint/no-unused-vars */
-interface Props {}
-
-export default function FollowModal(props: Props) {
-  return <div>Component goes here</div>;
-}

web/stories/FollowModal.stories.tsx

@@ -1,11 +1,11 @@
 import React from 'react';
 import { ComponentStory, ComponentMeta } from '@storybook/react';
-import FollowModal from '../components/modals/FollowModal';
+import FollowModal from '../components/modals/Follow/FollowModal';
 import FollowModalMock from './assets/mocks/follow-modal.png';
 
 const Example = () => (
   <div>
-    <FollowModal />
+    <FollowModal handleClose={null} />
   </div>
 );