Theme switching: Add TypeScript types

src/styles/ThemeStylesContext.ts

@@ -1,6 +1,6 @@
 import React from 'react';
-import styles from './styles';
+import styles, {type Styles} from './styles';
 
-const ThemeStylesContext = React.createContext(styles);
+const ThemeStylesContext = React.createContext<Styles>(styles);
 
 export default ThemeStylesContext;

src/styles/ThemeStylesProvider.tsx

@@ -1,20 +1,17 @@
 /* eslint-disable react/jsx-props-no-spreading */
 import React, {useMemo} from 'react';
-// TODO: Rename this to "styles" once the app is migrated to theme switching hooks and HOCs
-import {stylesGenerator as stylesUntyped} from './styles';
+import {stylesGenerator} from './styles';
 import useTheme from './themes/useTheme';
 import ThemeStylesContext from './ThemeStylesContext';
 
-const styles = stylesUntyped;
-
 type ThemeStylesProviderProps = {
     children: React.ReactNode;
 };
 
 function ThemeStylesProvider({children}: ThemeStylesProviderProps) {
     const theme = useTheme();
 
-    const themeStyles = useMemo(() => styles(theme), [theme]);
+    const themeStyles = useMemo(() => stylesGenerator(theme), [theme]);
 
     return <ThemeStylesContext.Provider value={themeStyles}>{children}</ThemeStylesContext.Provider>;
 }

src/styles/colors.js → src/styles/colors.ts

@@ -1,7 +1,12 @@
+import {Color} from './themes/types';
+
 /**
- * DO NOT import colors.js into files. Use ../themes/default.js instead.
+ * DO NOT import colors.js into files. Use the theme switching hooks and HOCs instead.
+ * For functional components, you can use the `useTheme` and `useThemeStyles` hooks
+ * For class components, you can use the `withTheme` and `withThemeStyles` HOCs
  */
-export default {
+const colors: Record<string, Color> = {
+    // Brand Colors
     black: '#000000',
     white: '#FFFFFF',
     ivory: '#fffaf0',
@@ -91,3 +96,5 @@ export default {
     ice700: '#28736D',
     ice800: '#134038',
 };
+
+export default colors;

src/styles/styles.ts

@@ -19,7 +19,7 @@ import overflowXHidden from './overflowXHidden';
 import pointerEventsAuto from './pointerEventsAuto';
 import pointerEventsNone from './pointerEventsNone';
 import defaultTheme from './themes/default';
-import {ThemeDefault} from './themes/types';
+import {ThemeColors} from './themes/types';
 import borders from './utilities/borders';
 import cursor from './utilities/cursor';
 import display from './utilities/display';
@@ -80,7 +80,7 @@ const touchCalloutNone: Pick<ViewStyle, 'WebkitTouchCallout'> = Browser.isMobile
 // to prevent vertical text offset in Safari for badges, new lineHeight values have been added
 const lineHeightBadge: Pick<ViewStyle, 'lineHeight'> = Browser.isSafari() ? {lineHeight: variables.lineHeightXSmall} : {lineHeight: variables.lineHeightNormal};
 
-const picker = (theme: ThemeDefault) =>
+const picker = (theme: ThemeColors) =>
     ({
         backgroundColor: theme.transparent,
         color: theme.text,
@@ -96,14 +96,14 @@ const picker = (theme: ThemeDefault) =>
         textAlign: 'left',
     } satisfies TextStyle);
 
-const link = (theme: ThemeDefault) =>
+const link = (theme: ThemeColors) =>
     ({
         color: theme.link,
         textDecorationColor: theme.link,
         fontFamily: fontFamily.EXP_NEUE,
     } satisfies ViewStyle & MixedStyleDeclaration);
 
-const baseCodeTagStyles = (theme: ThemeDefault) =>
+const baseCodeTagStyles = (theme: ThemeColors) =>
     ({
         borderWidth: 1,
         borderRadius: 5,
@@ -116,7 +116,7 @@ const headlineFont = {
     fontWeight: '500',
 } satisfies TextStyle;
 
-const webViewStyles = (theme: ThemeDefault) =>
+const webViewStyles = (theme: ThemeColors) =>
     ({
         // As of react-native-render-html v6, don't declare distinct styles for
         // custom renderers, the API for custom renderers has changed. Declare the
@@ -211,7 +211,7 @@ const webViewStyles = (theme: ThemeDefault) =>
         },
     } satisfies WebViewStyle);
 
-const styles = (theme: ThemeDefault) =>
+const styles = (theme: ThemeColors) =>
     ({
         // Add all of our utility and helper styles
         ...spacing,
@@ -4014,12 +4014,8 @@ const styles = (theme: ThemeDefault) =>
         },
     } satisfies Styles);
 
-// For now we need to export the styles function that takes the theme as an argument
-// as something named different than "styles", because a lot of files import the "defaultStyles"
-// as "styles", which causes ESLint to throw an error.
-// TODO: Remove "stylesGenerator" and instead only return "styles" once the app is migrated to theme switching hooks and HOCs and "styles/theme/default.js" is not used anywhere anymore (GH issue: https://github.com/Expensify/App/issues/27337)
 const stylesGenerator = styles;
 const defaultStyles = styles(defaultTheme);
 
 export default defaultStyles;
-export {stylesGenerator};
+export {stylesGenerator, type Styles};

src/styles/themes/ThemeContext.ts

@@ -0,0 +1,7 @@
+import React from 'react';
+import darkTheme from './default';
+import {ThemeColors} from './types';
+
+const ThemeContext = React.createContext<ThemeColors>(darkTheme);
+
+export default ThemeContext;

src/styles/themes/ThemeProvider.js → src/styles/themes/ThemeProvider.tsx

@@ -2,8 +2,8 @@
 import PropTypes from 'prop-types';
 import React, {useMemo} from 'react';
 import CONST from '@src/CONST';
-// Going to eventually import the light theme here too
 import darkTheme from './default';
+import lightTheme from './light';
 import ThemeContext from './ThemeContext';
 import useThemePreference from './useThemePreference';
 
@@ -12,10 +12,10 @@ const propTypes = {
     children: PropTypes.node.isRequired,
 };
 
-function ThemeProvider(props) {
+function ThemeProvider(props: React.PropsWithChildren) {
     const themePreference = useThemePreference();
 
-    const theme = useMemo(() => (themePreference === CONST.THEME.LIGHT ? /* TODO: replace with light theme */ darkTheme : darkTheme), [themePreference]);
+    const theme = useMemo(() => (themePreference === CONST.THEME.LIGHT ? lightTheme : darkTheme), [themePreference]);
 
     return <ThemeContext.Provider value={theme}>{props.children}</ThemeContext.Provider>;
 }

src/styles/themes/default.ts

@@ -1,6 +1,6 @@
 import colors from '@styles/colors';
 import SCREENS from '@src/SCREENS';
-import type {ThemeBase} from './types';
+import {ThemeColors} from './types';
 
 const darkTheme = {
     // Figma keys
@@ -83,19 +83,18 @@ const darkTheme = {
     starDefaultBG: 'rgb(254, 228, 94)',
     loungeAccessOverlay: colors.blue800,
     mapAttributionText: colors.black,
-    PAGE_BACKGROUND_COLORS: {},
     white: colors.white,
-} satisfies ThemeBase;
 
-darkTheme.PAGE_BACKGROUND_COLORS = {
-    [SCREENS.HOME]: darkTheme.sidebar,
-    [SCREENS.SAVE_THE_WORLD.ROOT]: colors.tangerine800,
-    [SCREENS.SETTINGS.PREFERENCES]: colors.blue500,
-    [SCREENS.SETTINGS.WORKSPACES]: colors.pink800,
-    [SCREENS.SETTINGS.WALLET]: colors.darkAppBackground,
-    [SCREENS.SETTINGS.SECURITY]: colors.ice500,
-    [SCREENS.SETTINGS.STATUS]: colors.green700,
-    [SCREENS.SETTINGS.ROOT]: darkTheme.sidebar,
-};
+    PAGE_BACKGROUND_COLORS: {
+        [SCREENS.HOME]: colors.darkHighlightBackground,
+        [SCREENS.SAVE_THE_WORLD.ROOT]: colors.tangerine800,
+        [SCREENS.SETTINGS.PREFERENCES]: colors.blue500,
+        [SCREENS.SETTINGS.WORKSPACES]: colors.pink800,
+        [SCREENS.SETTINGS.WALLET]: colors.darkAppBackground,
+        [SCREENS.SETTINGS.SECURITY]: colors.ice500,
+        [SCREENS.SETTINGS.STATUS]: colors.green700,
+        [SCREENS.SETTINGS.ROOT]: colors.darkHighlightBackground,
+    },
+} satisfies ThemeColors;
 
 export default darkTheme;

src/styles/themes/light.ts

@@ -1,6 +1,6 @@
 import colors from '@styles/colors';
 import SCREENS from '@src/SCREENS';
-import type {ThemeDefault} from './types';
+import {ThemeColors} from './types';
 
 const lightTheme = {
     // Figma keys
@@ -16,9 +16,9 @@ const lightTheme = {
     iconSuccessFill: colors.green400,
     iconReversed: colors.lightAppBackground,
     iconColorfulBackground: `${colors.ivory}cc`,
-    textColorfulBackground: colors.ivory,
     textSupporting: colors.lightSupportingText,
     text: colors.lightPrimaryText,
+    textColorfulBackground: colors.ivory,
     link: colors.blue600,
     linkHover: colors.blue500,
     buttonDefaultBG: colors.lightDefaultButton,
@@ -83,19 +83,18 @@ const lightTheme = {
     starDefaultBG: 'rgb(254, 228, 94)',
     loungeAccessOverlay: colors.blue800,
     mapAttributionText: colors.black,
-    PAGE_BACKGROUND_COLORS: {},
     white: colors.white,
-} satisfies ThemeDefault;
 
-lightTheme.PAGE_BACKGROUND_COLORS = {
-    [SCREENS.HOME]: lightTheme.sidebar,
-    [SCREENS.SAVE_THE_WORLD.ROOT]: colors.tangerine800,
-    [SCREENS.SETTINGS.PREFERENCES]: colors.blue500,
-    [SCREENS.SETTINGS.WALLET]: colors.darkAppBackground,
-    [SCREENS.SETTINGS.WORKSPACES]: colors.pink800,
-    [SCREENS.SETTINGS.SECURITY]: colors.ice500,
-    [SCREENS.SETTINGS.STATUS]: colors.green700,
-    [SCREENS.SETTINGS.ROOT]: lightTheme.sidebar,
-};
+    PAGE_BACKGROUND_COLORS: {
+        [SCREENS.HOME]: colors.lightHighlightBackground,
+        [SCREENS.SAVE_THE_WORLD.ROOT]: colors.tangerine800,
+        [SCREENS.SETTINGS.PREFERENCES]: colors.blue500,
+        [SCREENS.SETTINGS.WORKSPACES]: colors.pink800,
+        [SCREENS.SETTINGS.WALLET]: colors.darkAppBackground,
+        [SCREENS.SETTINGS.SECURITY]: colors.ice500,
+        [SCREENS.SETTINGS.STATUS]: colors.green700,
+        [SCREENS.SETTINGS.ROOT]: colors.lightHighlightBackground,
+    },
+} satisfies ThemeColors;
 
 export default lightTheme;

src/styles/themes/types.ts

@@ -1,8 +1,89 @@
-import DeepRecord from '@src/types/utils/DeepRecord';
-import defaultTheme from './default';
+type Color = string;
 
-type ThemeBase = DeepRecord<string, string>;
+type ThemeColors = {
+    // Figma keys
+    appBG: Color;
+    splashBG: Color;
+    highlightBG: Color;
+    border: Color;
+    borderLighter: Color;
+    borderFocus: Color;
+    icon: Color;
+    iconMenu: Color;
+    iconHovered: Color;
+    iconSuccessFill: Color;
+    iconReversed: Color;
+    iconColorfulBackground: Color;
+    textSupporting: Color;
+    text: Color;
+    textColorfulBackground: Color;
+    link: Color;
+    linkHover: Color;
+    buttonDefaultBG: Color;
+    buttonHoveredBG: Color;
+    buttonPressedBG: Color;
+    danger: Color;
+    dangerHover: Color;
+    dangerPressed: Color;
+    warning: Color;
+    success: Color;
+    successHover: Color;
+    successPressed: Color;
+    transparent: Color;
+    signInPage: Color;
+    dangerSection: Color;
 
-type ThemeDefault = typeof defaultTheme;
+    // Additional keys
+    overlay: Color;
+    inverse: Color;
+    shadow: Color;
+    componentBG: Color;
+    hoverComponentBG: Color;
+    activeComponentBG: Color;
+    signInSidebar: Color;
+    sidebar: Color;
+    sidebarHover: Color;
+    heading: Color;
+    textLight: Color;
+    textDark: Color;
+    textReversed: Color;
+    textBackground: Color;
+    textMutedReversed: Color;
+    textError: Color;
+    offline: Color;
+    modalBackground: Color;
+    cardBG: Color;
+    cardBorder: Color;
+    spinner: Color;
+    unreadIndicator: Color;
+    placeholderText: Color;
+    heroCard: Color;
+    uploadPreviewActivityIndicator: Color;
+    dropUIBG: Color;
+    receiptDropUIBG: Color;
+    checkBox: Color;
+    pickerOptionsTextColor: Color;
+    imageCropBackgroundColor: Color;
+    fallbackIconColor: Color;
+    reactionActiveBackground: Color;
+    reactionActiveText: Color;
+    badgeAdHoc: Color;
+    badgeAdHocHover: Color;
+    mentionText: Color;
+    mentionBG: Color;
+    ourMentionText: Color;
+    ourMentionBG: Color;
+    tooltipSupportingText: Color;
+    tooltipPrimaryText: Color;
+    skeletonLHNIn: Color;
+    skeletonLHNOut: Color;
+    QRLogo: Color;
+    starDefaultBG: Color;
+    loungeAccessOverlay: Color;
+    mapAttributionText: Color;
+    white: Color;
 
-export type {ThemeBase, ThemeDefault};
+    PAGE_BACKGROUND_COLORS: Record<string, Color>;
+};
+
+export {type ThemeColors, type Color};

src/styles/themes/useTheme.js → src/styles/themes/useTheme.ts

@@ -1,11 +1,12 @@
 import {useContext} from 'react';
 import ThemeContext from './ThemeContext';
+import {ThemeColors} from './types';
 
-function useTheme() {
+function useTheme(): ThemeColors {
     const theme = useContext(ThemeContext);
 
     if (!theme) {
-        throw new Error('StylesContext was null! Are you sure that you wrapped the component under a <ThemeProvider>?');
+        throw new Error('ThemeContext was null! Are you sure that you wrapped the component under a <ThemeProvider>?');
     }
 
     return theme;

src/styles/themes/useThemePreference.js → src/styles/themes/useThemePreference.ts

@@ -1,29 +1,31 @@
 import {useContext, useEffect, useState} from 'react';
-import {Appearance} from 'react-native';
+import {Appearance, ColorSchemeName} from 'react-native';
 import {PreferredThemeContext} from '@components/OnyxProvider';
 import CONST from '@src/CONST';
 
+type ThemePreference = typeof CONST.THEME.LIGHT | typeof CONST.THEME.DARK;
+
 function useThemePreference() {
-    const [themePreference, setThemePreference] = useState(CONST.THEME.DEFAULT);
-    const [systemTheme, setSystemTheme] = useState();
-    const preferredThemeContext = useContext(PreferredThemeContext);
+    const [themePreference, setThemePreference] = useState<ThemePreference>(CONST.THEME.DEFAULT);
+    const [systemTheme, setSystemTheme] = useState<ColorSchemeName>();
+    const preferredThemeFromStorage = useContext(PreferredThemeContext);
 
     useEffect(() => {
         // This is used for getting the system theme, that can be set in the OS's theme settings. This will always return either "light" or "dark" and will update automatically if the OS theme changes.
         const systemThemeSubscription = Appearance.addChangeListener(({colorScheme}) => setSystemTheme(colorScheme));
-        return systemThemeSubscription.remove;
+        return () => systemThemeSubscription.remove();
     }, []);
 
     useEffect(() => {
-        const theme = preferredThemeContext || CONST.THEME.DEFAULT;
+        const theme = preferredThemeFromStorage ?? CONST.THEME.DEFAULT;
 
         // If the user chooses to use the device theme settings, we need to set the theme preference to the system theme
         if (theme === CONST.THEME.SYSTEM) {
-            setThemePreference(systemTheme);
+            setThemePreference(systemTheme ?? CONST.THEME.DEFAULT);
         } else {
             setThemePreference(theme);
         }
-    }, [preferredThemeContext, systemTheme]);
+    }, [preferredThemeFromStorage, systemTheme]);
 
     return themePreference;
 }