Easter egg 🐣

shh

crabfit-frontend/src/App.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, Suspense, lazy } from 'react';
+import { useState, useEffect, useCallback, Suspense, lazy } from 'react';
 import {
 	BrowserRouter,
   Switch,
@@ -6,11 +6,13 @@ import {
 } from 'react-router-dom';
 import { ThemeProvider, Global } from '@emotion/react';
 
-import { Settings, Loading } from 'components';
+import { Settings, Loading, Egg } from 'components';
 
 import { useSettingsStore } from 'stores';
 import theme from 'theme';
 
+const EGG_PATTERN = ['ArrowUp', 'ArrowUp', 'ArrowDown', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'ArrowLeft', 'ArrowRight', 'b', 'a'];
+
 const Home = lazy(() => import('pages/Home/Home'));
 const Event = lazy(() => import('pages/Event/Event'));
 
@@ -20,13 +22,49 @@ const App = () => {
 	const [isDark, setIsDark] = useState(darkQuery.matches);
   const [offline, setOffline] = useState(!window.navigator.onLine);
 
+  const [eggCount, setEggCount] = useState(0);
+  const [eggVisible, setEggVisible] = useState(false);
+  const [eggKey, setEggKey] = useState(0);
+
+  const eggHandler = useCallback(
+    event => {
+      if (EGG_PATTERN.indexOf(event.key) < 0 || event.key !== EGG_PATTERN[eggCount]) {
+        setEggCount(0);
+        return;
+      }
+      setEggCount(eggCount+1);
+      if (EGG_PATTERN.length === eggCount+1) {
+        setEggKey(eggKey+1);
+        setEggCount(0);
+        setEggVisible(true);
+      }
+    },
+    [eggCount, eggKey]
+  );
+
 	darkQuery.addListener(e => colortheme === 'System' && setIsDark(e.matches));
 
   useEffect(() => {
-    window.addEventListener('offline', () => setOffline(true));
-    window.addEventListener('online', () => setOffline(false));
+    const onOffline = () => setOffline(true);
+    const onOnline = () => setOffline(false);
+
+    window.addEventListener('offline', onOffline, false);
+    window.addEventListener('online', onOnline, false);
+
+    return () => {
+      window.removeEventListener('offline', onOffline, false);
+      window.removeEventListener('online', onOnline, false);
+    };
   }, []);
 
+  useEffect(() => {
+    document.addEventListener('keyup', eggHandler, false);
+
+    return () => {
+      document.removeEventListener('keyup', eggHandler, false);
+    };
+  }, [eggHandler]);
+
   useEffect(() => {
     setIsDark(colortheme === 'System' ? darkQuery.matches : colortheme === 'Dark');
   }, [colortheme, darkQuery.matches]);
@@ -84,6 +122,8 @@ const App = () => {
 				</Switch>
 
         <Settings />
+
+        {eggVisible && <Egg eggKey={eggKey} onClose={() => setEggVisible(false)} />}
 			</ThemeProvider>
 		</BrowserRouter>
   );

crabfit-frontend/src/components/Egg/Egg.tsx

@@ -0,0 +1,21 @@
+import { useState } from 'react';
+
+import { Loading } from 'components';
+import { Image, Wrapper } from './eggStyle';
+
+const Egg = ({ eggKey, onClose }) => {
+  const [isLoading, setIsLoading] = useState(true);
+
+  return (
+  	<Wrapper title="Click anywhere to close" onClick={() => onClose()}>
+  		<Image
+        src={`https://us-central1-flour-app-services.cloudfunctions.net/charliAPI?v=${eggKey}`}
+        onLoadStart={() => setIsLoading(true)}
+        onLoad={() => setIsLoading(false)}
+      />
+      {isLoading && <Loading />}
+  	</Wrapper>
+  );
+}
+
+export default Egg;

crabfit-frontend/src/components/Egg/eggStyle.ts

@@ -0,0 +1,23 @@
+import styled from '@emotion/styled';
+
+export const Wrapper = styled.div`
+	position: fixed;
+  background: rgba(0,0,0,.6);
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  height: 100%;
+  width: 100%;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  z-index: 1000;
+  cursor: pointer;
+`;
+
+export const Image = styled.img`
+	max-width: 80%;
+	max-height: 80%;
+  position: absolute;
+`;

crabfit-frontend/src/components/index.ts

@@ -14,3 +14,4 @@ export { default as Loading } from './Loading/Loading';
 export { default as Center } from './Center/Center';
 export { default as Donate } from './Donate/Donate';
 export { default as Settings } from './Settings/Settings';
+export { default as Egg } from './Egg/Egg';