🌈️ apply a wallpaper based on the weather outside
fix(apply): write Windows apply wallpaper script to a file
Angel Wang
(Jun 23, 2026, 12:09 AM -0600)
f2ad6231
33dbc8a1
+39
-31
+2
-25
src/apply/index.ts
+2
-25
src/apply/index.ts
···
1
1
import type { ImageAnalysisData } from "../analyze/analysis.ts"
2
-
import { applyConfigPath, cachePath, chalkDebug, loadConfig, map, mapEaseOutExp, mapEaseOutQuint } from "../utils.ts"
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+
import { applyConfigPath, cachePath, chalkDebug, loadConfig, map, mapEaseOutExp, mapEaseOutQuint, windowsApplyScriptPath } from "../utils.ts"
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import { type ApplicationConfig, defaultConfig, findMatchingImages, getOpenMeteoData } from "./application.ts"
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import * as SunCalc from "suncalc"
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5
import "zx/globals"
···
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if (Deno.build.os != "windows") {
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await $`eval ${config.applyWallpaperCommand.replace("%s", targetImage.path)}`
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} else {
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-
// C# in TypeScript. who would've thought
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-
// uiAction: SPI_SetDeskWallpaper = 0x0014 = 20
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// uiParam: unused = 0
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// pvParam: path to the image
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// fWinIni: SPIF_SENDCHANGE (update user profile + broadcast setting change) = 0x02 = 2
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const command = `
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$code = @'
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using System.Runtime.InteropServices;
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namespace Win32 {
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public class Wallpaper {
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[DllImport("user32.dll", CharSet=CharSet.Auto)]
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static extern int SystemParametersInfoA(int uiAction, int uiParam, string pvParam, int fWinIni);
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public static void SetWallpaper(string imagePath){
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SystemParametersInfo(20, 0, imagePath, 2);
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}
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}
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}
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'@
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-
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add-type $code
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[Win32.Wallpaper]::SetWallpaper(${targetImage.path})
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`
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await $`pwsh ${command}`
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await $`pwsh ${windowsApplyScriptPath}`
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}
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console.info(`Success! Enjoy :)`)
+37
-6
src/utils.ts
+37
-6
src/utils.ts
···
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}
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}
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+
// ensure the config and cache directories exist
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+
if (!fs.statSync(path.fromFileUrl(`file:///${getConfigPath()}`), { throwIfNoEntry: false })) {
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fs.mkdirSync(path.fromFileUrl(`file:///${getConfigPath()}`), { recursive: true })
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}
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+
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if (!fs.statSync(path.fromFileUrl(`file:///${getCachePath()}`), { throwIfNoEntry: false })) {
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fs.mkdirSync(path.fromFileUrl(`file:///${getCachePath()}`), { recursive: true })
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}
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+
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export const applyConfigPath = path.fromFileUrl(`file:///${getConfigPath()}/apply-config.json`)
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export const analyzeConfigPath = path.fromFileUrl(`file:///${getConfigPath()}/analyze-config.json`)
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export const cachePath = path.fromFileUrl(`file:///${getCachePath()}/analysis.json`)
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+
export const windowsApplyScriptPath = path.fromFileUrl(`file:///${getConfigPath()}/setWallpaper.ps1`)
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-
// ensure the config and cache directories exist
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if (!fs.statSync(path.fromFileUrl(`file:///${getConfigPath()}`))) {
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fs.mkdirSync(path.fromFileUrl(`file:///${getConfigPath()}`), { recursive: true })
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}
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+
if (!fs.statSync(windowsApplyScriptPath, { throwIfNoEntry: false })) {
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+
// C# in TypeScript. who would've thought
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+
// uiAction: SPI_SetDeskWallpaper = 0x0014 = 20
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+
// uiParam: unused = 0
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// pvParam: path to the image
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+
// fWinIni: SPIF_SENDCHANGE (update user profile + broadcast setting change) = 0x02 = 2
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+
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const command = `
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$imagePath = $args[0]
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$code = @'
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using System.Runtime.InteropServices;
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namespace Win32 {
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public class Wallpaper {
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[DllImport("user32.dll", CharSet=CharSet.Auto)]
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static extern int SystemParametersInfoA(int uiAction, int uiParam, string pvParam, int fWinIni);
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+
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public static void SetWallpaper(string imagePath){
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SystemParametersInfo(20, 0, imagePath, 2);
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}
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}
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}
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'@
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-
if (!fs.statSync(path.fromFileUrl(`file:///${getCachePath()}`))) {
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-
fs.mkdirSync(path.fromFileUrl(`file:///${getCachePath()}`), { recursive: true })
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add-type $code
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[Win32.Wallpaper]::SetWallpaper($imagePath)
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`
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await fs.writeFile(windowsApplyScriptPath, command)
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console.info(`Wrote Windows wallpaper apply script at ${windowsApplyScriptPath}!`)
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}
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export async function loadConfig(pathToConfig: string, defaultConfig: object) {