From f2ad6231407a8e41574a6241c3eb8b7e09e9db11 Mon Sep 17 00:00:00 2001
From: Angel Wang <angel@angelcube.dev>
Date: Tue, 23 Jun 2026 00:05:39 -0600
Subject: [PATCH] fix(apply): write Windows apply wallpaper script to a file

---
 src/apply/index.ts | 27 ++-------------------------
 src/utils.ts       | 43 +++++++++++++++++++++++++++++++++++++------
 2 files changed, 39 insertions(+), 31 deletions(-)

diff --git a/src/apply/index.ts b/src/apply/index.ts
index 453a3c6..7f8275a 100644
--- a/src/apply/index.ts
+++ b/src/apply/index.ts
@@ -1,5 +1,5 @@
 import type { ImageAnalysisData } from "../analyze/analysis.ts"
-import { applyConfigPath, cachePath, chalkDebug, loadConfig, map, mapEaseOutExp, mapEaseOutQuint } from "../utils.ts"
+import { applyConfigPath, cachePath, chalkDebug, loadConfig, map, mapEaseOutExp, mapEaseOutQuint, windowsApplyScriptPath } from "../utils.ts"
 import { type ApplicationConfig, defaultConfig, findMatchingImages, getOpenMeteoData } from "./application.ts"
 import * as SunCalc from "suncalc"
 import "zx/globals"
@@ -83,29 +83,6 @@ console.info(`Setting wallpaper...`)
 if (Deno.build.os != "windows") {
 	await $`eval ${config.applyWallpaperCommand.replace("%s", targetImage.path)}`
 } else {
-	// C# in TypeScript. who would've thought
-	// uiAction: SPI_SetDeskWallpaper = 0x0014 = 20
-	// uiParam: unused = 0
-	// pvParam: path to the image
-	// fWinIni: SPIF_SENDCHANGE (update user profile + broadcast setting change) = 0x02 = 2
-	const command = `
-		$code = @' 
-		using System.Runtime.InteropServices; 
-			namespace Win32 { 
-				public class Wallpaper { 
-					[DllImport("user32.dll", CharSet=CharSet.Auto)] 
-					static extern int SystemParametersInfoA(int uiAction, int uiParam, string pvParam, int fWinIni);
-					
-					public static void SetWallpaper(string imagePath){ 
-						SystemParametersInfo(20, 0, imagePath, 2);
-					}
-				}
-			}
-		'@
-
-		add-type $code 
-		[Win32.Wallpaper]::SetWallpaper(${targetImage.path})
-	`
-	await $`pwsh ${command}`
+	await $`pwsh ${windowsApplyScriptPath}`
 }
 console.info(`Success! Enjoy :)`)
diff --git a/src/utils.ts b/src/utils.ts
index a2113dd..785ef4f 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -23,19 +23,50 @@ function getCachePath() {
 	}
 }
 
-export const applyConfigPath = path.fromFileUrl(`file:///${getConfigPath()}/apply-config.json`)
-export const analyzeConfigPath = path.fromFileUrl(`file:///${getConfigPath()}/analyze-config.json`)
-export const cachePath = path.fromFileUrl(`file:///${getCachePath()}/analysis.json`)
-
 // ensure the config and cache directories exist
-if (!fs.statSync(path.fromFileUrl(`file:///${getConfigPath()}`))) {
+if (!fs.statSync(path.fromFileUrl(`file:///${getConfigPath()}`), { throwIfNoEntry: false })) {
 	fs.mkdirSync(path.fromFileUrl(`file:///${getConfigPath()}`), { recursive: true })
 }
 
-if (!fs.statSync(path.fromFileUrl(`file:///${getCachePath()}`))) {
+if (!fs.statSync(path.fromFileUrl(`file:///${getCachePath()}`), { throwIfNoEntry: false })) {
 	fs.mkdirSync(path.fromFileUrl(`file:///${getCachePath()}`), { recursive: true })
 }
 
+export const applyConfigPath = path.fromFileUrl(`file:///${getConfigPath()}/apply-config.json`)
+export const analyzeConfigPath = path.fromFileUrl(`file:///${getConfigPath()}/analyze-config.json`)
+export const cachePath = path.fromFileUrl(`file:///${getCachePath()}/analysis.json`)
+export const windowsApplyScriptPath = path.fromFileUrl(`file:///${getConfigPath()}/setWallpaper.ps1`)
+
+if (!fs.statSync(windowsApplyScriptPath, { throwIfNoEntry: false })) {
+	// C# in TypeScript. who would've thought
+	// uiAction: SPI_SetDeskWallpaper = 0x0014 = 20
+	// uiParam: unused = 0
+	// pvParam: path to the image
+	// fWinIni: SPIF_SENDCHANGE (update user profile + broadcast setting change) = 0x02 = 2
+
+	const command = `
+		$imagePath = $args[0]
+		$code = @' 
+		using System.Runtime.InteropServices; 
+			namespace Win32 { 
+				public class Wallpaper { 
+					[DllImport("user32.dll", CharSet=CharSet.Auto)] 
+					static extern int SystemParametersInfoA(int uiAction, int uiParam, string pvParam, int fWinIni);
+					
+					public static void SetWallpaper(string imagePath){ 
+						SystemParametersInfo(20, 0, imagePath, 2);
+					}
+				}
+			}
+		'@
+
+		add-type $code 
+		[Win32.Wallpaper]::SetWallpaper($imagePath)
+	`
+	await fs.writeFile(windowsApplyScriptPath, command)
+	console.info(`Wrote Windows wallpaper apply script at ${windowsApplyScriptPath}!`)
+}
+
 export async function loadConfig(pathToConfig: string, defaultConfig: object) {
 	let config: object | undefined
 	try {
-- 
2.51.2