add dark mode

package.json

@@ -34,6 +34,7 @@
     "lucide-react": "^0.363.0",
     "next": "^14.1.3",
     "next-auth": "^4.24.6",
+    "next-themes": "^0.3.0",
     "posthog-js": "^1.116.6",
     "react": "18.2.0",
     "react-dom": "18.2.0",

src/components/patterns/color-mode-switch.tsx

@@ -0,0 +1,40 @@
+"use client";
+
+import * as React from "react";
+import { Moon, Sun } from "lucide-react";
+import { useTheme } from "next-themes";
+
+import { Button } from "~/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "~/components/ui/dropdown-menu";
+
+export function ColorModeSwitch() {
+  const { setTheme } = useTheme();
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button variant="outline" size="icon">
+          <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
+          <Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
+          <span className="sr-only">Toggle theme</span>
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end">
+        <DropdownMenuItem onClick={() => setTheme("light")}>
+          Light
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("dark")}>
+          Dark
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("system")}>
+          System
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}

src/components/patterns/layout.tsx

@@ -15,6 +15,7 @@ import { Input } from "~/components/ui/input";
 import { Sheet, SheetContent, SheetTrigger } from "~/components/ui/sheet";
 import LoginLogoutButton from "./login-logout-button";
 import UserButton from "./user-button";
+import { ColorModeSwitch } from "./color-mode-switch";
 
 export async function Layout({ children }: { children: React.ReactNode }) {
   return (
@@ -120,6 +121,7 @@ export async function Layout({ children }: { children: React.ReactNode }) {
               />
             </div>
           </form>
+          <ColorModeSwitch />
           <DropdownMenu>
             <DropdownMenuTrigger asChild>
               <Button variant="secondary" size="icon" className="rounded-full">

src/components/providers/index.tsx

@@ -8,6 +8,7 @@ import { SessionProvider, useSession } from "next-auth/react";
 import { TRPCReactProvider } from "~/trpc/react";
 import { env } from "~/env.mjs";
 import { useSearchParams } from "next/navigation";
+import { ThemeProvider } from "./theme-provider";
 
 if (typeof window !== "undefined" && process.env.NODE_ENV === "production") {
   posthog.init(env.NEXT_PUBLIC_POSTHOG_API_KEY!, {
@@ -31,13 +32,20 @@ const PostHogIdentification = ({ children }: { children: React.ReactNode }) => {
 
 const Providers = ({ children }: { children: React.ReactNode }) => {
   return (
-    <TRPCReactProvider>
-      <SessionProvider>
-        <PostHogProvider client={posthog}>
-          <PostHogIdentification>{children}</PostHogIdentification>
-        </PostHogProvider>
-      </SessionProvider>
-    </TRPCReactProvider>
+    <ThemeProvider
+      attribute="class"
+      defaultTheme="system"
+      enableSystem
+      disableTransitionOnChange
+    >
+      <TRPCReactProvider>
+        <SessionProvider>
+          <PostHogProvider client={posthog}>
+            <PostHogIdentification>{children}</PostHogIdentification>
+          </PostHogProvider>
+        </SessionProvider>
+      </TRPCReactProvider>
+    </ThemeProvider>
   );
 };
 

src/components/providers/theme-provider.tsx

@@ -0,0 +1,9 @@
+"use client";
+
+import * as React from "react";
+import { ThemeProvider as NextThemesProvider } from "next-themes";
+import { type ThemeProviderProps } from "next-themes/dist/types";
+
+export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>;
+}