Adds Windows Media Source selection options

Introduces radio buttons to choose between downloading a Windows ESD or providing a custom Windows ISO file, enhancing flexibility for media source selection. Updates configuration handling and event listeners to toggle visibility and appropriately populate combo boxes based on the selected media source.

FFUDevelopment/FFUUI.Core/FFUUI.Core.Config.psm1

@@ -54,6 +54,7 @@ function Get-UIConfig {
         InstallOffice                  = $State.Controls.chkInstallOffice.IsChecked
         InstallWingetApps              = $State.Controls.chkInstallWingetApps.IsChecked
         ISOPath                        = $State.Controls.txtISOPath.Text
+        WindowsMediaSource             = if ($null -ne $State.Controls.rbProvideISO -and $State.Controls.rbProvideISO.IsChecked) { "Provide Windows ISO" } else { "Download Windows ESD" }
         LogicalSectorSizeBytes         = [int]$State.Controls.cmbLogicalSectorSize.SelectedItem.Content
         # Make                           = $null
         MediaType                      = $State.Controls.cmbMediaType.SelectedItem
@@ -486,6 +487,15 @@ function Update-UIFromConfig {
 
     # Windows Settings
     Set-UIValue -ControlName 'txtISOPath' -PropertyName 'Text' -ConfigObject $ConfigContent -ConfigKey 'ISOPath' -State $State
+    # Load Windows Media Source setting
+    if ($null -ne $ConfigContent.PSObject.Properties.Item('WindowsMediaSource')) {
+        if ($ConfigContent.WindowsMediaSource -eq 'Provide Windows ISO') {
+            $State.Controls.rbProvideISO.IsChecked = $true
+        }
+        else {
+            $State.Controls.rbDownloadESD.IsChecked = $true
+        }
+    }
     
     # Special handling for Windows Release and SKU due to value collision (e.g., 2019 for Server and LTSC)
     if (($null -ne $ConfigContent.PSObject.Properties.Item('WindowsRelease')) -and ($null -ne $ConfigContent.PSObject.Properties.Item('WindowsSKU'))) {

FFUDevelopment/FFUUI.Core/FFUUI.Core.Handlers.psm1

@@ -392,12 +392,31 @@ function Register-EventHandlers {
         })
 
     # Windows Settings tab Event Handlers
-    $State.Controls.txtISOPath.Add_TextChanged({
-            param($eventSource, $textChangedEventArgs)
-            $window = [System.Windows.Window]::GetWindow($eventSource)
-            $localState = $window.Tag
-            Get-WindowsSettingsCombos -isoPath $localState.Controls.txtISOPath.Text -State $localState
-        })
+    # Windows Media Source radio buttons
+    if ($null -ne $State.Controls.rbProvideISO) {
+        $State.Controls.rbProvideISO.Add_Checked({
+                param($eventSource, $routedEventArgs)
+                $window = [System.Windows.Window]::GetWindow($eventSource)
+                if ($null -eq $window -or $null -eq $window.Tag) { return }
+                $localState = $window.Tag
+                $localState.Controls.isoPathPanel.Visibility = 'Visible'
+                # Use a placeholder .iso path to trigger ISO mode even before a real path is provided
+                $isoPath = $localState.Controls.txtISOPath.Text
+                if ([string]::IsNullOrWhiteSpace($isoPath)) {
+                    $isoPath = 'placeholder.iso'
+                }
+                Get-WindowsSettingsCombos -isoPath $isoPath -State $localState
+            })
+        $State.Controls.rbProvideISO.Add_Unchecked({
+                param($eventSource, $routedEventArgs)
+                $window = [System.Windows.Window]::GetWindow($eventSource)
+                if ($null -eq $window -or $null -eq $window.Tag) { return }
+                $localState = $window.Tag
+                $localState.Controls.isoPathPanel.Visibility = 'Collapsed'
+                $localState.Controls.txtISOPath.Text = ''
+                Get-WindowsSettingsCombos -isoPath '' -State $localState
+            })
+    }
 
     $State.Controls.cmbWindowsRelease.Add_SelectionChanged({
             param($eventSource, $selectionChangedEventArgs)
@@ -407,7 +426,13 @@ function Register-EventHandlers {
             if ($null -ne $localState.Controls.cmbWindowsRelease.SelectedItem) {
                 $selectedReleaseValue = $localState.Controls.cmbWindowsRelease.SelectedItem.Value
             }
-            Update-WindowsVersionCombo -selectedRelease $selectedReleaseValue -isoPath $localState.Controls.txtISOPath.Text -State $localState
+            # Determine ISO path based on radio button state
+            $isoPath = ''
+            if ($null -ne $localState.Controls.rbProvideISO -and $localState.Controls.rbProvideISO.IsChecked) {
+                $isoPath = $localState.Controls.txtISOPath.Text
+                if ([string]::IsNullOrWhiteSpace($isoPath)) { $isoPath = 'placeholder.iso' }
+            }
+            Update-WindowsVersionCombo -selectedRelease $selectedReleaseValue -isoPath $isoPath -State $localState
             Update-WindowsSkuCombo -State $localState
             Update-WindowsArchCombo -State $localState
 

FFUDevelopment/FFUUI.Core/FFUUI.Core.Initialize.psm1

@@ -112,6 +112,9 @@ function Initialize-UIControls {
     $State.Controls.cmbWindowsRelease = $window.FindName('cmbWindowsRelease')
     $State.Controls.cmbWindowsVersion = $window.FindName('cmbWindowsVersion')
     $State.Controls.txtISOPath = $window.FindName('txtISOPath')
+    $State.Controls.rbDownloadESD = $window.FindName('rbDownloadESD')
+    $State.Controls.rbProvideISO = $window.FindName('rbProvideISO')
+    $State.Controls.isoPathPanel = $window.FindName('isoPathPanel')
     $State.Controls.btnBrowseISO = $window.FindName('btnBrowseISO')
     $State.Controls.cmbWindowsArch = $window.FindName('cmbWindowsArch')
     $State.Controls.cmbWindowsLang = $window.FindName('cmbWindowsLang')
@@ -389,7 +392,12 @@ function Initialize-UIDefaults {
     $State.Controls.cmbLogicalSectorSize.SelectedItem = ($State.Controls.cmbLogicalSectorSize.Items | Where-Object { $_.Content -eq $State.Defaults.generalDefaults.LogicalSectorSize.ToString() })
    
     # Populate Windows Release, Version, and SKU comboboxes
-    Get-WindowsSettingsCombos -isoPath $State.Defaults.windowsSettingsDefaults.DefaultISOPath -State $State
+    # Initialize Windows settings combos based on media source mode
+    $initIsoPath = $State.Defaults.windowsSettingsDefaults.DefaultISOPath
+    if ($null -ne $State.Controls.rbProvideISO -and -not $State.Controls.rbProvideISO.IsChecked) {
+        $initIsoPath = ''
+    }
+    Get-WindowsSettingsCombos -isoPath $initIsoPath -State $State
     
     # Windows Settings tab defaults
     $State.Controls.cmbWindowsLang.ItemsSource = $State.Defaults.windowsSettingsDefaults.AllowedLanguages