windows

windows/system/lock-screen/apply.ps1

@@ -0,0 +1,87 @@
+$ErrorActionPreference = "Stop"
+
+function Wait-WinRtOperation {
+    param(
+        [Parameter(Mandatory)]
+        [object] $Operation,
+
+        [Parameter(Mandatory)]
+        [type] $ResultType
+    )
+
+    $asTask = [System.WindowsRuntimeSystemExtensions].GetMethods() |
+        Where-Object {
+            $_.Name -eq "AsTask" -and
+            $_.IsGenericMethod -and
+            $_.GetParameters().Count -eq 1 -and
+            $_.GetParameters()[0].ParameterType.Name -eq "IAsyncOperation``1"
+        } |
+        Select-Object -First 1
+
+    if (-not $asTask) {
+        throw "The WinRT AsTask adapter was not found."
+    }
+
+    $task = $asTask.MakeGenericMethod($ResultType).Invoke($null, @($Operation))
+    return $task.GetAwaiter().GetResult()
+}
+
+function Wait-WinRtAction {
+    param(
+        [Parameter(Mandatory)]
+        [object] $Action
+    )
+
+    $asTask = [System.WindowsRuntimeSystemExtensions].GetMethods() |
+        Where-Object {
+            $_.Name -eq "AsTask" -and
+            -not $_.IsGenericMethod -and
+            $_.GetParameters().Count -eq 1 -and
+            $_.GetParameters()[0].ParameterType.Name -eq "IAsyncAction"
+        } |
+        Select-Object -First 1
+
+    if (-not $asTask) {
+        throw "The WinRT action adapter was not found."
+    }
+
+    $task = $asTask.Invoke($null, @($Action))
+    $task.GetAwaiter().GetResult()
+}
+
+Add-Type -AssemblyName System.Runtime.WindowsRuntime
+[Windows.Storage.StorageFile, Windows.Storage, ContentType = WindowsRuntime] |
+    Out-Null
+[Windows.System.UserProfile.LockScreen, Windows.System.UserProfile, ContentType = WindowsRuntime] |
+    Out-Null
+
+$imagePath = Join-Path $env:SystemRoot "Web\Screen\img100.jpg"
+
+if (-not (Test-Path -LiteralPath $imagePath -PathType Leaf)) {
+    throw "The default Windows lock screen image was not found: $imagePath"
+}
+
+$currentImage = [Windows.System.UserProfile.LockScreen]::OriginalImageFile
+$currentPath = if ($currentImage) {
+    $currentImage.AbsolutePath.Replace("/", "\")
+}
+
+if ($currentPath -ieq $imagePath) {
+    return
+}
+
+$file = Wait-WinRtOperation `
+    -Operation ([Windows.Storage.StorageFile]::GetFileFromPathAsync($imagePath)) `
+    -ResultType ([Windows.Storage.StorageFile])
+
+Wait-WinRtAction `
+    -Action ([Windows.System.UserProfile.LockScreen]::SetImageFileAsync($file))
+
+$updatedPath = [Windows.System.UserProfile.LockScreen]::OriginalImageFile.AbsolutePath.Replace(
+    "/",
+    "\"
+)
+
+if ($updatedPath -ine $imagePath) {
+    throw "Windows did not accept the default lock screen image."
+}