use reflow to migrate from flow to typescript

scm-ui/ui-components/src/layout/Page.tsx

@@ -0,0 +1,115 @@
+import * as React from 'react';
+import classNames from 'classnames';
+import styled from 'styled-components';
+import Loading from './../Loading';
+import ErrorNotification from './../ErrorNotification';
+import Title from './Title';
+import Subtitle from './Subtitle';
+import PageActions from './PageActions';
+import ErrorBoundary from '../ErrorBoundary';
+
+type Props = {
+  title?: string;
+  subtitle?: string;
+  loading?: boolean;
+  error?: Error;
+  showContentOnError?: boolean;
+  children: React.Node;
+};
+
+const PageActionContainer = styled.div`
+  justify-content: flex-end;
+  align-items: center;
+
+  // every child except first
+  > * ~ * {
+    margin-left: 1.25rem;
+  }
+`;
+
+export default class Page extends React.Component<Props> {
+  render() {
+    const { error } = this.props;
+    return (
+      <section className="section">
+        <div className="container">
+          {this.renderPageHeader()}
+          <ErrorBoundary>
+            <ErrorNotification error={error} />
+            {this.renderContent()}
+          </ErrorBoundary>
+        </div>
+      </section>
+    );
+  }
+
+  isPageAction(node: any) {
+    return (
+      node.displayName === PageActions.displayName ||
+      (node.type && node.type.displayName === PageActions.displayName)
+    );
+  }
+
+  renderPageHeader() {
+    const { error, title, subtitle, children } = this.props;
+
+    let pageActions = null;
+    let pageActionsExists = false;
+    React.Children.forEach(children, child => {
+      if (child && !error) {
+        if (this.isPageAction(child)) {
+          pageActions = (
+            <PageActionContainer
+              className={classNames(
+                'column',
+                'is-three-fifths',
+                'is-mobile-action-spacing',
+                'is-flex',
+              )}
+            >
+              {child}
+            </PageActionContainer>
+          );
+          pageActionsExists = true;
+        }
+      }
+    });
+    let underline = pageActionsExists ? (
+      <hr className="header-with-actions" />
+    ) : null;
+
+    return (
+      <>
+        <div className="columns">
+          <div className="column">
+            <Title title={title} />
+            <Subtitle subtitle={subtitle} />
+          </div>
+          {pageActions}
+        </div>
+        {underline}
+      </>
+    );
+  }
+
+  renderContent() {
+    const { loading, children, showContentOnError, error } = this.props;
+
+    if (error && !showContentOnError) {
+      return null;
+    }
+    if (loading) {
+      return <Loading />;
+    }
+
+    let content = [];
+    React.Children.forEach(children, child => {
+      if (child) {
+        if (!this.isPageAction(child)) {
+          content.push(child);
+        }
+      }
+    });
+    return content;
+  }
+}