Refactor preferChocolatey system to handle other package managers easier (#3296)

* Easier to add more package managers changes

* style fixes

functions/private/Get-WinUtilSelectedPackages.ps1

@@ -0,0 +1,59 @@
+function Get-WinUtilSelectedPackages
+{
+     <#
+    .SYNOPSIS
+        Sorts given packages based on installer preference and availability.
+
+    .OUTPUTS
+        Hashtable. Key = Package Manager, Value = ArrayList of packages to install
+    #>
+    param (
+        [Parameter(Mandatory=$true)]
+        $PackageList,
+        [Parameter(Mandatory=$true)]
+        [PackageManagers]$Preference
+    )
+
+    if ($PackageList.count -eq 1) {
+        $sync.form.Dispatcher.Invoke([action]{ Set-WinUtilTaskbaritem -state "Indeterminate" -value 0.01 -overlay "logo" })
+    } else {
+        $sync.form.Dispatcher.Invoke([action]{ Set-WinUtilTaskbaritem -state "Normal" -value 0.01 -overlay "logo" })
+    }
+
+    $packages = [System.Collections.Hashtable]::new()
+    $packagesWinget = [System.Collections.ArrayList]::new()
+    $packagesChoco = [System.Collections.ArrayList]::new()
+    $packages[[PackageManagers]::Winget] = $packagesWinget
+    $packages[[PackageManagers]::Choco] = $packagesChoco
+
+    Write-Debug "Checking packages using Preference '$($Preference)'"
+
+    foreach ($package in $PackageList) {
+        switch ($Preference) {
+            "Choco" {
+                if ($package.choco -eq "na") {
+                    Write-Debug "$($package.content) has no Choco value."
+                    $packagesWinget.add($package.winget)
+                    Write-Host "Queueing $($package.winget) for Winget"
+                } else {
+                    $null = $packagesChoco.add($package.choco)
+                    Write-Host "Queueing $($package.choco) for Chocolatey"
+                }
+                break
+            }
+            "Winget" {
+                if ($package.winget -eq "na") {
+                    Write-Debug "$($package.content) has no Winget value."
+                    $packagesChoco.add($package.choco)
+                    Write-Host "Queueing $($package.choco) for Chocolatey"
+                } else {
+                    $null = $packagesWinget.add($($package.winget))
+                    Write-Host "Queueing $($package.winget) for Winget"
+                }
+                break
+            }
+        }
+    }
+
+    return $packages
+}

functions/private/Set-PackageManagerPreference.ps1

@@ -0,0 +1,45 @@
+function Set-PackageManagerPreference {
+    <#
+    .SYNOPSIS
+        Sets the currently selected package manager to global "ManagerPreference" in sync.
+        Also persists preference across Winutil restarts via preference.ini.
+
+        Reads from preference.ini if no argument sent.
+
+    .PARAMETER preferedPackageManager
+        The PackageManager that was selected.
+    #>
+    param(
+        [Parameter(Position=0, Mandatory=$false)]
+        [PackageManagers]$preferedPackageManager
+    )
+
+    $preferencePath = "$env:LOCALAPPDATA\winutil\preferences.ini"
+    $oldChocoPath = "$env:LOCALAPPDATA\winutil\preferChocolatey.ini"
+
+    #Try loading from file if no argument given.
+    if ($null -eq $preferedPackageManager) {
+        # Backwards compat for preferChocolatey.ini
+        if (Test-Path -Path $oldChocoPath) {
+            $preferedPackageManager = [PackageManagers]::Choco
+            Remove-Item -Path $oldChocoPath
+        }
+        else {
+            $potential = Get-Content -Path $preferencePath -TotalCount 1
+            if ($potential)
+                {$preferedPackageManager = [PackageManagers]$potential}
+        }
+    }
+
+    #If no preference argument, .ini file bad read, and $sync empty then default to winget.
+    if ($null -eq $preferedPackageManager -and $null -eq $sync["ManagerPreference"])
+        { $preferedPackageManager = [PackageManagers]::Winget }
+
+
+    $sync["ManagerPreference"] = [PackageManagers]::$preferedPackageManager
+    Write-Debug "Manager Preference changed to '$($sync["ManagerPreference"])'"
+
+
+    # Write preference to file to persist across restarts.
+    Out-File -FilePath $preferencePath -InputObject $sync["ManagerPreference"]
+}