refactor(wakeup): change var names

- change targetComputer var name to PascalCase for consistency
- parameterize database location, change variable name to PascalCase

wakeup.ps1

@@ -6,9 +6,13 @@ param
 # Computer to wake up
     [Alias("Computer")]
     [String]
-    $targetComputer = "",
-# Skip RDP connectivity readiness check
-    [Alias("Check", "Readiness")]
+    $TargetComputer = "",
+# XML database file containing computer details
+    [Alias("List", "database", "db")]
+    [String]
+    $WolDatabase = "WOLDatabase.xml",
+# Skip connectivity readiness check
+    [Alias("NoCheck", "NoReadiness")]
     [Switch]
     $ConnectivityCheck = $false,
 # RDP connectivity readiness check timeout
@@ -56,35 +60,35 @@ if (!(Get-Module -Name $wolModuleName))
 }
 
 # exit if database cannot be found/read
-if (!(Test-Path -Path $wolDatabase -PathType Leaf))
+if (!(Test-Path -Path $WolDatabase -PathType Leaf))
 {
-    $errMessage = "Unable to find or read Wake-On-LAN database file ($wolDatabase)"
+    $errMessage = "Unable to find or read Wake-On-LAN database file ($WolDatabase)"
     exitError $errMessage
 }
 
 # get target computer name if not already specified
-if ( [String]::IsNullOrWhiteSpace($targetComputer))
+if ( [String]::IsNullOrWhiteSpace($TargetComputer))
 {
     do
     {
-        $targetComputer = Read-Host -Prompt 'Computer to wake-up'
-    } while ( [String]::IsNullOrWhiteSpace($targetComputer))
+        $TargetComputer = Read-Host -Prompt 'Computer to wake-up'
+    } while ( [String]::IsNullOrWhiteSpace($TargetComputer))
 }
 Write-Host
 
 # read database and assemble list of target computers
-[xml]$db = Get-Content -Path $wolDatabase
+[xml]$db = Get-Content -Path $WolDatabase
 $broadcastIP = $db.WOLDatabase.Configuration.BroadcastAddress
 $port = $db.WOLDatabase.Configuration.Port
 $dnsSuffix = $db.WOLDatabase.Configuration.DnsSuffix
 $targetComputers = [System.Collections.Generic.List[PSObject]]::new()
-$db.WOLDatabase.Computers.Computer | Where-Object { $_.name -match "$targetComputer" } | ForEach-Object { $targetComputers.Add($_) }
+$db.WOLDatabase.Computers.Computer | Where-Object { $_.name -match "$TargetComputer" } | ForEach-Object { $targetComputers.Add($_) }
 $removeFromTargetComputers = [System.Collections.Generic.List[String]]::new()
 
 # exit if nothing to do (i.e. empty targetComputers list)
 if ($targetComputers.Count -eq 0)
 {
-    Write-Host -ForegroundColor Yellow "No computers found matching '$targetComputer'. Nothing to do.`r`n"
+    Write-Host -ForegroundColor Yellow "No computers found matching '$TargetComputer'. Nothing to do.`r`n"
     exit 0
 }