# Script to install Microsoft Office versions 2016-2024.
# Technolog Networks - 2024-09-16
# iRaven

Start-Transcript -Path "c:\irnh\Install-MSOffice.log" -Append

$SoftwareDeployLocation = "\\minuette2.technolog.net\SoftwareLibrary\Software\MSOffice"
$ParamVersion = $args[0]

# Office Install Checks
echo "Checking currently installed Office version (if applicable)..."
$OfficeVersionInstalled = (Get-WmiObject -Class Win32_Product | where name -like "Microsoft Office*" | select Name, Version).Version
$Office2016 = (Get-WmiObject -Class Win32_Product | where name -like "Microsoft Office*2016" | select Name, Version)
$Office2019 = (Get-WmiObject -Class Win32_Product | where name -like "Microsoft Office*2019" | select Name, Version)
$Office2021 = (Get-WmiObject -Class Win32_Product | where name -like "Microsoft Office*2021" | select Name, Version)
$Office2024 = (Get-WmiObject -Class Win32_Product | where name -like "Microsoft Office*2024" | select Name, Version)

Function CheckInstall {
    if ($null -ne $OfficeVersionInstalled) {
        if ($OfficeVersionInstalled -ge "16.0" ) { # Checks if currently installed Office is less than version 16 (2016)
            if ($null -eq $Office2016 -and $ParamVersion -eq 2016) {
                Write-Host "Office $ParamVersion is already installed. No action will be taken."
                return $true
            } elseif ($null -ne $Office2019 -and $ParamVersion -eq 2019) {
                Write-Host "Office $ParamVersion is already installed. No action will be taken."
                return $true
            } elseif ($null -ne $Office2021 -and $ParamVersion -eq 2021) {
                Write-Host "Office $ParamVersion is already installed. No action will be taken."
                return $true
            } elseif ($null -ne $Office2024 -and $ParamVersion -eq 2024) {
                Write-Host "Office $ParamVersion is already installed. No action will be taken."
                return $true
            } else {
                Write-Host "The office version currently installed is different from specified ($ParamVersion). Upgrading to $ParamVersion."
                return $false
            }
        } else {
            Write-Host "An older version of Office is already installed. Upgrading to $ParamVersion."
            return $true
        }
    } else {
        Write-Host "Office is not installed at all."
        return $false
    }
}

if ((CheckInstall) -eq $false) {
    cd $SoftwareDeployLocation
    if ($ParamVersion -eq 2016){
        try {
            .\OfficeProPlus2016_VL\setup.exe /adminfile TNGOffice16Deploy.msp
        } catch {
            Write-Host "Office $ParamVersion could not be installed."
        }
    } elseif ($ParamVersion -eq 2021) {
        try {
            .\setup.exe /configure office2021_deploy.xml
        } catch {
            Write-Host "Office $ParamVersion could not be installed."
        }
    } elseif ($ParamVersion -eq 2024) {
        try {
            .\setup.exe /configure office2024_deploy.xml
        } catch {
            Write-Host "Office $ParamVersion could not be installed."
        }
    }
}

Stop-Transcript