feature(wakeup): run multiple connectivity checks up to timeout

wakeup.ps1

@@ -131,6 +131,7 @@ $targetComputers | ForEach-Object {
     else
     {
         Write-Host -ForegroundColor Red "[ERROR]"
+        # queue for removal from computers on which to run a connectivity check
         $removeFromTargetComputers.Add($name)
     }
 }
@@ -152,7 +153,7 @@ elseif ($targetComputers.Count -eq 0)
     exitError "No wake-up packets sent successfully" -exitCode 5
 }
 
-# wait for initialWaitTime seconds to let computer(s) wake up
+# wait for initial delay seconds to let computer(s) wake up
 for ($i = $ConnectivityCheckDelay; $i -gt 0; $i--) {
     Write-Progress -Activity "Waiting for computer(s) to wake-up..." -SecondsRemaining $i
     Start-Sleep 1
@@ -162,9 +163,11 @@ Write-Progress -Activity "Waiting for computer(s) to wake-up..." -Completed
 # iterate computers and test connectivity
 # TODO: run multiple connectivity tests as needed, spaced evenly apart up to max timeout THEN fail
 # TODO: run connectivity test as background job
-
-
-$targetComputers | ForEach-Object {
+$connCheckTotalTime = 0
+$removeFromTargetComputers.Clear()
+while ($connCheckTotalTime -le $ConnectivityCheckTimeout -and $targetComputers.Count -gt 0)
+{
+    $targetComputers | ForEach-Object {
         $name = $_.name
         $friendlyName = $_.friendlyName
         $fqdn = -join ($name, $dnsSuffix)
@@ -189,6 +192,26 @@ $targetComputers | ForEach-Object {
         else
         {
             Write-Host -ForegroundColor Green "[OK]"
+            # queue for removal from computers to check next round
+            $removeFromTargetComputers.Add($name)
+        }
+    }
+
+    # remove computers from targetComputers if connectivity check already successful
+    $removeFromTargetComputers | ForEach-Object {
+        $removeName = $_
+        $targetComputers.Remove(($targetComputers | Where-Object { $_.name -eq $removeName })) | Out-Null
+    }
+
+    # sleep until next test interval and increase time counter
+    if ($targetComputers.Count -gt 0)
+    {
+        for ($i = $ConnectivityCheckInterval; $i -gt 0; $i--) {
+            Write-Progress -Activity "Waiting for next connectivity check..." -SecondsRemaining $i
+            Start-Sleep 1
+        }
+        Write-Progress -Activity "Waiting for next connectivity check..." -Completed
+        $connCheckTotalTime += $ConnectivityCheckInterval
     }
 }