Added components and logic to dynamically change theme

src/settings/RealTimeUpdates.tsx

@@ -19,6 +19,9 @@ const RealTimeUpdates = (
     <FormGroup>
       <ToggleSwitch checked={realTimeUpdates.enabled} onChange={toggleRealTimeUpdates}>
         Enable or disable real-time updates, when using Shlink v2.2.0 or newer.
+        <small className="form-text text-muted">
+          Real-time updates are currently being <b>{realTimeUpdates.enabled ? 'processed' : 'ignored'}</b>.
+        </small>
       </ToggleSwitch>
     </FormGroup>
     <FormGroup className="mb-0">

src/settings/Settings.tsx

@@ -2,14 +2,19 @@ import { FC } from 'react';
 import { Row } from 'reactstrap';
 import NoMenuLayout from '../common/NoMenuLayout';
 
-const Settings = (RealTimeUpdates: FC, ShortUrlCreation: FC) => () => (
+const Settings = (RealTimeUpdates: FC, ShortUrlCreation: FC, UserInterface:FC) => () => (
   <NoMenuLayout>
     <Row>
       <div className="col-lg-6">
-        <RealTimeUpdates />
+        <div className="mb-3 mb-md-4">
+          <UserInterface />
+        </div>
+        <div className="mb-3 mb-md-4">
+          <ShortUrlCreation />
+        </div>
       </div>
       <div className="col-lg-6">
-        <ShortUrlCreation />
+        <RealTimeUpdates />
       </div>
     </Row>
   </NoMenuLayout>

src/settings/UserInterface.tsx

@@ -0,0 +1,26 @@
+import { FC } from 'react';
+import { SimpleCard } from '../utils/SimpleCard';
+import ToggleSwitch from '../utils/ToggleSwitch';
+import { changeThemeInMarkup, Theme } from '../utils/theme';
+import { Settings, UiSettings } from './reducers/settings';
+
+interface UserInterfaceProps {
+  settings: Settings;
+  setUiSettings: (settings: UiSettings) => void;
+}
+
+export const UserInterface: FC<UserInterfaceProps> = ({ settings: { ui }, setUiSettings }) => (
+  <SimpleCard title="User interface">
+    <ToggleSwitch
+      checked={ui?.theme === 'dark'}
+      onChange={(useDarkTheme) => {
+        const theme: Theme = useDarkTheme ? 'dark' : 'light';
+
+        setUiSettings({ theme });
+        changeThemeInMarkup(theme);
+      }}
+    >
+      Use dark theme
+    </ToggleSwitch>
+  </SimpleCard>
+);

src/settings/reducers/settings.ts

@@ -2,6 +2,7 @@ import { Action } from 'redux';
 import { dissoc, mergeDeepRight } from 'ramda';
 import { buildReducer } from '../../utils/helpers/redux';
 import { RecursivePartial } from '../../utils/utils';
+import { Theme } from '../../utils/theme';
 
 export const SET_SETTINGS = 'shlink/realTimeUpdates/SET_SETTINGS';
 
@@ -19,9 +20,14 @@ export interface ShortUrlCreationSettings {
   validateUrls: boolean;
 }
 
+export interface UiSettings {
+  theme: Theme;
+}
+
 export interface Settings {
   realTimeUpdates: RealTimeUpdatesSettings;
   shortUrlCreation?: ShortUrlCreationSettings;
+  ui?: UiSettings;
 }
 
 const initialState: Settings = {
@@ -31,6 +37,9 @@ const initialState: Settings = {
   shortUrlCreation: {
     validateUrls: false,
   },
+  ui: {
+    theme: 'light',
+  },
 };
 
 type SettingsAction = Action & Settings;
@@ -55,3 +64,8 @@ export const setShortUrlCreationSettings = (settings: ShortUrlCreationSettings):
   type: SET_SETTINGS,
   shortUrlCreation: settings,
 });
+
+export const setUiSettings = (settings: UiSettings): PartialSettingsAction => ({
+  type: SET_SETTINGS,
+  ui: settings,
+});

src/settings/services/provideServices.ts

@@ -1,14 +1,20 @@
 import Bottle from 'bottlejs';
 import RealTimeUpdates from '../RealTimeUpdates';
 import Settings from '../Settings';
-import { setRealTimeUpdatesInterval, setShortUrlCreationSettings, toggleRealTimeUpdates } from '../reducers/settings';
+import {
+  setRealTimeUpdatesInterval,
+  setShortUrlCreationSettings,
+  setUiSettings,
+  toggleRealTimeUpdates,
+} from '../reducers/settings';
 import { ConnectDecorator } from '../../container/types';
 import { withoutSelectedServer } from '../../servers/helpers/withoutSelectedServer';
 import { ShortUrlCreation } from '../ShortUrlCreation';
+import { UserInterface } from '../UserInterface';
 
 const provideServices = (bottle: Bottle, connect: ConnectDecorator) => {
   // Components
-  bottle.serviceFactory('Settings', Settings, 'RealTimeUpdates', 'ShortUrlCreation');
+  bottle.serviceFactory('Settings', Settings, 'RealTimeUpdates', 'ShortUrlCreation', 'UserInterface');
   bottle.decorator('Settings', withoutSelectedServer);
   bottle.decorator('Settings', connect(null, [ 'resetSelectedServer' ]));
 
@@ -21,10 +27,14 @@ const provideServices = (bottle: Bottle, connect: ConnectDecorator) => {
   bottle.serviceFactory('ShortUrlCreation', () => ShortUrlCreation);
   bottle.decorator('ShortUrlCreation', connect([ 'settings' ], [ 'setShortUrlCreationSettings' ]));
 
+  bottle.serviceFactory('UserInterface', () => UserInterface);
+  bottle.decorator('UserInterface', connect([ 'settings' ], [ 'setUiSettings' ]));
+
   // Actions
   bottle.serviceFactory('toggleRealTimeUpdates', () => toggleRealTimeUpdates);
   bottle.serviceFactory('setRealTimeUpdatesInterval', () => setRealTimeUpdatesInterval);
   bottle.serviceFactory('setShortUrlCreationSettings', () => setShortUrlCreationSettings);
+  bottle.serviceFactory('setUiSettings', () => setUiSettings);
 };
 
 export default provideServices;