Convert <DismissableBanner> to Typescript (#25582)

app/javascript/mastodon/components/dismissable_banner.jsx

@@ -1,55 +0,0 @@
-import PropTypes from 'prop-types';
-import { PureComponent } from 'react';
-
-import { injectIntl, defineMessages } from 'react-intl';
-
-import { bannerSettings } from 'mastodon/settings';
-
-import { IconButton } from './icon_button';
-
-const messages = defineMessages({
-  dismiss: { id: 'dismissable_banner.dismiss', defaultMessage: 'Dismiss' },
-});
-
-class DismissableBanner extends PureComponent {
-
-  static propTypes = {
-    id: PropTypes.string.isRequired,
-    children: PropTypes.node,
-    intl: PropTypes.object.isRequired,
-  };
-
-  state = {
-    visible: !bannerSettings.get(this.props.id),
-  };
-
-  handleDismiss = () => {
-    const { id } = this.props;
-    this.setState({ visible: false }, () => bannerSettings.set(id, true));
-  };
-
-  render () {
-    const { visible } = this.state;
-
-    if (!visible) {
-      return null;
-    }
-
-    const { children, intl } = this.props;
-
-    return (
-      <div className='dismissable-banner'>
-        <div className='dismissable-banner__message'>
-          {children}
-        </div>
-
-        <div className='dismissable-banner__action'>
-          <IconButton icon='times' title={intl.formatMessage(messages.dismiss)} onClick={this.handleDismiss} />
-        </div>
-      </div>
-    );
-  }
-
-}
-
-export default injectIntl(DismissableBanner);

app/javascript/mastodon/components/dismissable_banner.tsx

@@ -0,0 +1,47 @@
+import type { PropsWithChildren } from 'react';
+import { useCallback, useState } from 'react';
+
+import { defineMessages, useIntl } from 'react-intl';
+
+import { bannerSettings } from 'mastodon/settings';
+
+import { IconButton } from './icon_button';
+
+const messages = defineMessages({
+  dismiss: { id: 'dismissable_banner.dismiss', defaultMessage: 'Dismiss' },
+});
+
+interface Props {
+  id: string;
+}
+
+export const DismissableBanner: React.FC<PropsWithChildren<Props>> = ({
+  id,
+  children,
+}) => {
+  const [visible, setVisible] = useState(!bannerSettings.get(id));
+  const intl = useIntl();
+
+  const handleDismiss = useCallback(() => {
+    setVisible(false);
+    bannerSettings.set(id, true);
+  }, [id]);
+
+  if (!visible) {
+    return null;
+  }
+
+  return (
+    <div className='dismissable-banner'>
+      <div className='dismissable-banner__message'>{children}</div>
+
+      <div className='dismissable-banner__action'>
+        <IconButton
+          icon='times'
+          title={intl.formatMessage(messages.dismiss)}
+          onClick={handleDismiss}
+        />
+      </div>
+    </div>
+  );
+};