Set Reg Values

setRegValues.ps1

# Examples
#
# Run locally with dry-run mode
#.\setRegValues.ps1 -csvFilePath ".\DNSPatternMatches.csv" -dryRun -Verbose
#
# Run locally
#.\setRegValues.ps1 -csvFilePath ".\DNSPatternMatches.csv"
#
# Run remotely
#.\setRegValues.ps1 -csvFilePath ".\DNSPatternMatches.csv" -computerNames "RemoteComputer1", "RemoteComputer2"

# Example for DNSPatternMatches (generated by getRegValues.ps1 and add new column "newValue")
#
#"ComputerName","Path","Name","Value","newValue"
#"local","Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Google\Chrome\Extensions\cifnddnffldieaamihfkhkdgnbhfmaci","update_url","https://clients2.google.com/service/update2/crx","https://clients2.google.com/TEST"


[CmdletBinding()]
param (
    [Parameter(Mandatory=$true)]
    [string]$csvFilePath,
    
    [Parameter(Mandatory=$false)]
    [switch]$dryRun,
    
    [Parameter(Mandatory=$false)]
    [string[]]$computerNames = @("localhost")
)

function Set-RegistryValueLocal {
    [CmdletBinding()]
    param (
        [string]$path,
        [string]$name,
        [string]$newValue,
        [switch]$dryRun
    )

    try {
        $regPath = $path -replace '^HKEY_LOCAL_MACHINE\\', 'HKLM:\'
        
        if ($dryRun) {
            Write-Verbose "[DRY RUN] Would set registry value: $regPath\$name to $newValue"
        } else {
            if (!(Test-Path $regPath)) {
                New-Item -Path $regPath -Force | Out-Null
                Write-Verbose "Created new registry key: $regPath"
            }
            Set-ItemProperty -Path $regPath -Name $name -Value $newValue
            Write-Verbose "Set registry value: $regPath\$name to $newValue"
        }
    }
    catch {
        Write-Error "Error setting registry value $path\$name`: $_"
    }
}

function Set-RegistryValueRemote {
    [CmdletBinding()]
    param (
        [string]$computerName,
        [string]$path,
        [string]$name,
        [string]$newValue,
        [switch]$dryRun
    )
    
    try {
        $scriptBlock = {
            param($path, $name, $newValue, $dryRun)
            Set-RegistryValueLocal -path $path -name $name -newValue $newValue -dryRun:$dryRun -Verbose:$VerbosePreference
        }
        
        Invoke-Command -ComputerName $computerName -ScriptBlock $scriptBlock -ArgumentList $path, $name, $newValue, $dryRun
    }
    catch {
        Write-Error "Error setting registry value on $computerName`: $_"
    }
}

# Validate CSV file
if (!(Test-Path $csvFilePath)) {
    throw "CSV file not found: $csvFilePath"
}

$csvData = Import-Csv -Path $csvFilePath

if (@($csvData | Get-Member -MemberType NoteProperty | Select-Object -ExpandProperty Name) -notcontains 'newValue') {
    throw "CSV file does not contain 'newValue' column"
}

$totalOperations = ($computerNames.Count * ($csvData | Measure-Object).Count)
$currentOperation = 0

foreach ($computerName in $computerNames) {
    Write-Host "Processing computer: $computerName"
    
    foreach ($row in $csvData) {
        $currentOperation++
        
        # Check if required fields are present and not empty
        if ([string]::IsNullOrWhiteSpace($row.Path) -or [string]::IsNullOrWhiteSpace($row.Name) -or [string]::IsNullOrWhiteSpace($row.newValue)) {
            Write-Warning "Skipping row due to missing data: Path=$($row.Path), Name=$($row.Name), newValue=$($row.newValue)"
            continue
        }

        $progressParams = @{
            Activity = "Setting registry values"
            Status = "Processing $computerName : $($row.Path)\$($row.Name)"
            PercentComplete = ($currentOperation / $totalOperations) * 100
        }
        Write-Progress @progressParams

        if ($computerName -eq "localhost" -or $computerName -eq "127.0.0.1" -or $computerName -eq $env:COMPUTERNAME) {
            Set-RegistryValueLocal -path $row.Path -name $row.Name -newValue $row.newValue -dryRun:$dryRun -Verbose:$VerbosePreference
        }
        else {
            Set-RegistryValueRemote -computerName $computerName -path $row.Path -name $row.Name -newValue $row.newValue -dryRun:$dryRun -Verbose:$VerbosePreference
        }
    }
}

Write-Progress -Activity "Setting registry values" -Completed
Write-Host "Registry value setting process completed."