flowtyped everything, some functional, safety, and structural changes

UI/components/social-cards.js

@@ -0,0 +1,36 @@
+// @flow
+import * as React from 'react'
+import NextHead from 'next/head'
+
+export type SocialCardProps = {
+  title?: string,
+  description?: string,
+  image?: string,
+  imageSize?: number
+}
+
+const defaultProps: SocialCardProps = {
+  title: 'Roleypoly',
+  description: 'Tame your Discord roles.',
+  image: 'https://rp.kat.cafe/static/social.png',
+  imageSize: 200
+}
+
+const SocialCards: React.StatelessFunctionalComponent<SocialCardProps> = (props) => {
+  props = {
+    ...defaultProps,
+    ...props
+  }
+
+  return <NextHead>
+    <meta key='og:title' property='og:title' content={props.title} />
+    <meta key='og:description' property='og:description' content={props.description} />
+    <meta key='twitter:card' name='twitter:card' content='summary_large_image' />
+    <meta key='twitter:image' name='twitter:image' content={props.image} />
+    <meta key='og:image' property='og:image' content={props.image} />
+    <meta key='og:image:width' property='og:image:width' content={props.imageSize} />
+    <meta key='og:image:height' property='og:image:height' content={props.imageSize} />
+  </NextHead>
+}
+
+export default SocialCards