Notes

#Variables that need to be set for each run
$startFolder = "C:Program Files"; #The starting folder to analyze
$sourceHTMLFile = "C:finalTemplate.html"; #The html source template file
$destinationHTMLFile = "C:final.html"; #The final html file that will be produced, #does not need to exist

$htmlLines = @();

#Function that creates a folder detail record
function CreateFolderDetailRecord
{
param([string]$FolderPath)

#Get the total size of the folder by recursively summing its children
$subFolderItems = Get-ChildItem $FolderPath -recurse -force | Where-Object {$_.PSIsContainer -eq $false} | Measure-Object -property Length -sum | Select-Object Sum
$folderSizeRaw = 0;
$folderSize = 0;
$units = "";

#Account for no children
if($subFolderItems.sum -gt 0)
{
$folderSizeRaw = $subFolderItems.sum;
}

#Determine units for a more friendly output
if(($subFolderItems.sum / 1GB) -ge 1)
{
$units = "GB"
$folderSize = [math]::Round(($subFolderItems.sum / 1GB),2)
}
else
{
if(($subFolderItems.sum / 1MB) -ge 1)
{
$units = "MB"
$folderSize = [math]::Round(($subFolderItems.sum / 1MB),2)
}
else
{
$units = "KB"
$folderSize = [math]::Round(($subFolderItems.sum / 1KB),2)
}
}

#Create an object with the given properties
$newFolderRecord = New-Object –TypeName PSObject
$newFolderRecord | Add-Member –MemberType NoteProperty –Name FolderPath –Value $FolderPath;
$newFolderRecord | Add-Member –MemberType NoteProperty –Name FolderSizeRaw –Value $folderSizeRaw
$newFolderRecord | Add-Member –MemberType NoteProperty –Name FolderSizeInUnits –Value $folderSize;
$newFolderRecord | Add-Member –MemberType NoteProperty –Name Units –Value $units;

return $newFolderRecord;
}

#Function that recursively creates the html for the output, given a starting location
function GetAllFolderDetails
{
param([string]$FolderPath)

$recursiveHTML = @();

#Get properties used for processing
$folderItem = Get-Item -Path $FolderPath
$folderDetails = CreateFolderDetailRecord -FolderPath $FolderPath
$subFolders = Get-ChildItem $FolderPath | Where-Object {$_.PSIsContainer -eq $true} | Sort-Object

#If has subfolders, create hmtl drilldown.
if($subFolders.Count -gt 0)
{
$recursiveHTML += "<li><span class='caret'>" + $folderItem.Name + " (<span style='color:red'>" + $folderDetails.FolderSizeInUnits + " " + $folderDetails.Units + "</span>)" + "</span>"
$recursiveHTML += "<ul class='nested'>"
}
else
{
$recursiveHTML += "<li>" + $folderItem.Name + " (<span style='color:red'>" + $folderDetails.FolderSizeInUnits + " " + $folderDetails.Units + "</span>)";
}

#Recursively call this function for all subfolders
foreach($subFolder in $subFolders)
{
$recursiveHTML += GetAllFolderDetails -FolderPath $subFolder.FullName;
}

#Close up all tags
if($subFolders.Count -gt 0)
{
$recursiveHTML += "</ul>";
}

$recursiveHTML += "</li>";

return $recursiveHTML
}

#Processing Starts Here

#Opening html
$htmlLines += "<ul id='myUL'>"

#This function call will return all of the recursive html for the startign folder and below
$htmlLines += GetAllFolderDetails -FolderPath $startFolder

#Closing html
$htmlLines += "</ul>"

#Get the html template, replace the template with generated code and write to the final html file
$sourceHTML = Get-Content -Path $sourceHTMLFile;
$destinationHTML = $sourceHTML.Replace("[FinalHTML]", $htmlLines);
$destinationHTML | Set-Content $destinationHTMLFile