New: Dark theme for login screen

(cherry picked from commit cae134ec7b331d1c906343716472f3d043614b2c)

frontend/src/App/App.js

@@ -12,11 +12,10 @@ function App({ store, history }) {
     <DocumentTitle title={window.Prowlarr.instanceName}>
       <Provider store={store}>
         <ConnectedRouter history={history}>
-          <ApplyTheme>
-            <PageConnector>
-              <AppRoutes app={App} />
-            </PageConnector>
-          </ApplyTheme>
+          <ApplyTheme />
+          <PageConnector>
+            <AppRoutes app={App} />
+          </PageConnector>
         </ConnectedRouter>
       </Provider>
     </DocumentTitle>

frontend/src/App/ApplyTheme.js

@@ -1,50 +0,0 @@
-import PropTypes from 'prop-types';
-import React, { Fragment, useCallback, useEffect } from 'react';
-import { connect } from 'react-redux';
-import { createSelector } from 'reselect';
-import themes from 'Styles/Themes';
-
-function createMapStateToProps() {
-  return createSelector(
-    (state) => state.settings.ui.item.theme || window.Prowlarr.theme,
-    (
-      theme
-    ) => {
-      return {
-        theme
-      };
-    }
-  );
-}
-
-function ApplyTheme({ theme, children }) {
-  // Update the CSS Variables
-
-  const updateCSSVariables = useCallback(() => {
-    const arrayOfVariableKeys = Object.keys(themes[theme]);
-    const arrayOfVariableValues = Object.values(themes[theme]);
-
-    // Loop through each array key and set the CSS Variables
-    arrayOfVariableKeys.forEach((cssVariableKey, index) => {
-      // Based on our snippet from MDN
-      document.documentElement.style.setProperty(
-        `--${cssVariableKey}`,
-        arrayOfVariableValues[index]
-      );
-    });
-  }, [theme]);
-
-  // On Component Mount and Component Update
-  useEffect(() => {
-    updateCSSVariables(theme);
-  }, [updateCSSVariables, theme]);
-
-  return <Fragment>{children}</Fragment>;
-}
-
-ApplyTheme.propTypes = {
-  theme: PropTypes.string.isRequired,
-  children: PropTypes.object.isRequired
-};
-
-export default connect(createMapStateToProps)(ApplyTheme);

frontend/src/App/ApplyTheme.tsx

@@ -0,0 +1,37 @@
+import React, { Fragment, ReactNode, useCallback, useEffect } from 'react';
+import { useSelector } from 'react-redux';
+import { createSelector } from 'reselect';
+import themes from 'Styles/Themes';
+import AppState from './State/AppState';
+
+interface ApplyThemeProps {
+  children: ReactNode;
+}
+
+function createThemeSelector() {
+  return createSelector(
+    (state: AppState) => state.settings.ui.item.theme || window.Prowlarr.theme,
+    (theme) => {
+      return theme;
+    }
+  );
+}
+
+function ApplyTheme({ children }: ApplyThemeProps) {
+  const theme = useSelector(createThemeSelector());
+
+  const updateCSSVariables = useCallback(() => {
+    Object.entries(themes[theme]).forEach(([key, value]) => {
+      document.documentElement.style.setProperty(`--${key}`, value);
+    });
+  }, [theme]);
+
+  // On Component Mount and Component Update
+  useEffect(() => {
+    updateCSSVariables();
+  }, [updateCSSVariables, theme]);
+
+  return <Fragment>{children}</Fragment>;
+}
+
+export default ApplyTheme;