<#
Author: Gabe Kerntke
Company: UFS LLC
Date: 07-14-2025

.Synopsis
Script to update .NET 8

.Modified
2025-07-14 (GabeK) - Original script created

.PARAMETER VersionPattern 
    Regex pattern to grab all h3 headers on the $URL page

.PARAMETER downloadLinkPattern
    Regex pattern as a wildcard
#>

[CmdletBinding()]
Param(
    [Parameter(Mandatory = $false)]
    $File_Name_Extension = "exe",
    [Parameter(Mandatory = $false)]
    $Install_Parameters = "/s",
    [Parameter(Mandatory = $false)]
    $URL = "https://dotnet.microsoft.com/en-us/download/dotnet/8.0",
    [Parameter(Mandatory = $false)]
    $htmlContent = (Invoke-WebRequest -UseBasicParsing $URL).Content,
    [Parameter(Mandatory = $false)]
    $VersionPattern = '<h3[^>]*?>(.*?)</h3>',
    [Parameter(Mandatory = $false)]
    $downloadLinkPattern = 'href="(/en-us/download/dotnet/thank-you/[^"]+?(\d+\.\d+\.\d+)([^"]+?))"'
)

#Region Functions
Function Get-Online_Version {
    $FilterContent = [regex]::Matches($htmlContent, $VersionPattern, 'Singleline') | Select-Object -ExpandProperty Value | Select-Object -First 15
    $SortContent = $FilterContent -replace '<[^>]+>' -replace '.NET'
    $AppVersions = $SortContent | Where-Object { $_ -like "*$Version_Name*" } | Select-Object -First 1
    $Online_Version = $AppVersions -replace "[^\d*\.?\d*$/]" , ''
    Return $Online_Version
}

Function Get-Download_URL {
    $regex = [regex]::new($downloadLinkPattern) # Create a Regex object
    $match = $regex.Matches($htmlContent) | Select-Object -ExpandProperty Value | Where-Object { $_ -like "*Windows*" -and $_ -like "*x64*" -and $_ -like "*installer*" } | Select-Object -First 15
    $sort = $match -replace 'href="/' , "" -replace '"' , "" | Where-Object { $_ -like "*$Download_Name*" } | Select-Object -First 1
    $DownloadURL = (Invoke-WebRequest -UseBasicParsing "https://dotnet.microsoft.com/$sort").Links.href -like "*.exe" | Select-Object -First 1
    Return $DownloadURL
}

Function Update-App {
    #Get currently installed version 
    $B = Get-Software | Where-Object { $_.DisplayName -like "*$App_Name*" } | Select-Object -ExpandProperty DisplayName | Select-Object -First 1
    $Local_Version = $B -replace "(x64)" , '' -replace ".NET", '' -replace "[^\d*\.?\d*$/]" , ''
    Invoke-WebRequest -UseBasicParsing "https://scripts.gabesville.com/Gabesville/Powershell-Scripts/raw/branch/main/Functions%20Scripts/Functions.ps1" -outfile "C:\Temp\Script Cache\Functions.ps1"
    . "C:\Temp\Script Cache\Functions.ps1"
    
    #Comparing version already installed to what is online
    If ([version]$Local_Version -lt [version]$Online_Version) {
        Test-Probe_Online
        Install-App
    }
    Else { Write-Host "$App_Name already on latest version (Installed version: $Local_Version)" }
}

Function Install-ASP_NET_CORE {
    $App_Name = "ASP.NET Core"
    $Version_Name = "ASP Core Runtime"
    $Download_Name = "aspnetcore"
    $EPCache_Folder = "3rd Party Patches\$App_Name"
    $Online_Version = Get-Online_Version
    $File_Name = "$App_Name-$Online_Version.$File_Name_Extension"
    $DownloadURL = Get-Download_URL
    Update-App
}

Function Install-Desktop_Runtime {
    $App_Name = "Desktop Runtime"
    $Version_Name = "Desktop Runtime"
    $Download_Name = "desktop"
    $EPCache_Folder = "3rd Party Patches\$App_Name"
    $Online_Version = Get-Online_Version
    $File_Name = "$App_Name-$Online_Version.$File_Name_Extension"
    $DownloadURL = Get-Download_URL
    Update-App
}

Function Install-Net_Runtime {
    $App_Name = ".NET Runtime"
    $Version_Name = "Runtime [0-9]"
    $Download_Name = "runtime-[0-9]"
    $EPCache_Folder = "3rd Party Patches\$App_Name"
    $Online_Version = Get-Online_Version
    $File_Name = "$App_Name-$Online_Version.$File_Name_Extension"
    $DownloadURL = Get-Download_URL
    Update-App
}

Function Install-Net_SDK {
    $App_Name = ".NET SDK"
    $Version_Name = "SDK"
    $Download_Name = "sdk"
    $EPCache_Folder = "3rd Party Patches\$App_Name"
    $Online_Version = Get-Online_Version
    $File_Name = "$App_Name-$Online_Version.$File_Name_Extension"
    $DownloadURL = Get-Download_URL
    Update-App
}

#Region Script Start
If ((Test-Path "C:\Temp\Script Cache") -eq $False) { New-Item -ItemType directory -Path "C:\Temp\Script Cache" }
Invoke-WebRequest -UseBasicParsing "https://scripts.gabesville.com/Gabesville/Powershell-Scripts/raw/branch/main/Functions%20Scripts/Functions.ps1" -outfile "C:\Temp\Script Cache\Functions.ps1"
. "C:\Temp\Script Cache\Functions.ps1"

#Check to see if program is installed
$Applist = Get-Software | Sort-Object -Descending

If ($Applist.DisplayName -like "*Windows Desktop Runtime*" -or $Applist.DisplayName -like "*.NET Runtime*" -or $Applist.DisplayName -like "*ASP.NET Core*" -or $Applist.DisplayName -like "*.NET SDK*") {
    If ($Applist.DisplayName -like "*ASP.NET Core*") { Install-ASP_NET_CORE }

    If ($Applist.DisplayName -like "*Windows Desktop Runtime*") { Install-Desktop_Runtime }

    If ($Applist.DisplayName -like "*.NET Runtime*") { Install-Net_Runtime }

    If ($Applist.DisplayName -like "*.NET SDK*") { Install-Net_SDK }
}
Else { Write-Host "No .NET apps installed." }
#Region Script End