Dogecoin Update Script (Powershell)

gistfile1.txt

<#  
.SYNOPSIS  
    Updates user's Dogecoin wallet  
.DESCRIPTION  
    This script will prompt the user to select a Dogecoin wallet
    from the Dogecoin GitHub page. Once selected, the wallet will
    be downloaded and created in 'C:\Doge\CurrentWallet'. The 
    following folders will be created if they don't already exist:
        C:\Doge\
        C:\Doge\CurrentWallet\
        C:\Doge\WalletDatBackups\
        C:\Doge\OtherWallets\WalletZips\
        C:\Doge\OtherWallets\OldWallets\
    This script will also backup the user's wallet.dat file, and
    create a shortcut to the application on the user's desktop.
.NOTES  
    File Name  : DogecoinUpdate.ps1  
    Author     : Eric Gross - doge@pop-pirate.biz  
    Requires   : PowerShell V2 
.LINK 
#>

function Create-VersionSelectBox {

    param(
        [array]$DropDownArray
    )

    Add-Type -AssemblyName System.Windows.Forms
    Add-Type -AssemblyName System.Drawing

    $Form = New-Object System.Windows.Forms.Form
    $Form.width = 350
    $Form.height = 125
    $Form.Text = ”Dogecoin Wallet Update”
    $Form.StartPosition = "CenterScreen"

    $DropDownFrom = New-Object System.Windows.Forms.ComboBox
    $DropDownFrom.Location = New-Object System.Drawing.Size(185,10)
    $DropDownFrom.Size = New-Object System.Drawing.Size(130,30)

    $DropDownArray | ForEach-Object { $DropDownFrom.Items.Add($_) | Out-Null }

    $Form.Controls.Add($DropDownFrom)

    $DropDownFromLabel = New-Object System.Windows.Forms.Label
    $DropDownFromLabel.Location = New-Object System.Drawing.Size(10,10)
    $DropDownFromLabel.Size = New-Object System.Drawing.Size(300,40)
    $DropDownFromLabel.Text = "Select Dogecoin wallet version"
    $Form.Controls.Add($DropDownFromLabel)

    $OKButton = new-object System.Windows.Forms.Button
    $OKButton.Location = new-object System.Drawing.Size(25,60)
    $OKButton.Size = new-object System.Drawing.Size(100,20)
    $OKButton.Text = "OK"
    $OKButton.Add_Click({
        $Form.DialogResult = "OK"
        $Form.close()
    })
    $form.Controls.Add($OKButton)


    $CancelButton = New-Object System.Windows.Forms.Button
    $CancelButton.Location = New-Object System.Drawing.Size(200,60)
    $CancelButton.Size = New-Object System.Drawing.Size(100,20)
    $CancelButton.Text = "Cancel"
    $CancelButton.Add_Click({
        $Form.DialogResult = "Cancel"
        $Form.close()
    })
    $Form.Controls.Add($CancelButton)

    $Form.Add_Shown({$Form.Activate()})

    $result = $Form.ShowDialog()

    if(($result -eq "OK") -and ($DropDownFrom.SelectedItem -ne $null)) {
        return $DropDownFrom.SelectedItem.ToString()
    }
}

function Get-DogeWalletArray {
    #Scrape links from GitHub release page
    $links = ($webclient.downloadstring('https://github.com/dogecoin/dogecoin/releases') -split "<a\s+") | `
    ForEach-Object {[void]($_ -match "^href=[`'`"]([^`'`">\s]*)"); if($matches.count -gt 0){ $matches[1] } } | `
    Where-Object { $_ -like "/dogecoin/dogecoin/releases/download/*/dogecoin-qt-*-Win.zip" } 

    $verdict = @{}
    
    $links | ForEach-Object {
        $verdict[($_ -split "/")[-1]] = $_
    }
    
    return $verdict
}

$paths = @{
    "root" = "C:\Doge\"
    "currentwallet" = "C:\Doge\CurrentWallet\"
    "walletdatbkp" = "C:\Doge\WalletDatBackups\"
    "walletzips" = "C:\Doge\OtherWallets\WalletZips\"
    "oldwallets" = "C:\Doge\OtherWallets\OldWallets\"
}

$timestamp = Get-Date -Format "yyyyMMddHHmmss"

$webclient = New-Object -TypeName System.Net.WebClient

$walletarray = Get-DogeWalletArray

$choice = Create-VersionSelectBox -DropDownArray $walletarray.Keys

if($choice -ne $null) {
    #Create Directory Structure
    $paths.Keys | ForEach-Object { 
        if(!(Test-Path $paths[$_])){ 
            Write-Host -ForegroundColor Green "Creating $($paths[$_])..."
            New-Item -ItemType directory -Path $paths[$_] | Out-Null 
        }
    }

    #Backup Existing Wallet.DAT file
    Write-Host -ForegroundColor Green "Backing Up wallet.dat..."
    Copy-Item "$env:APPDATA\DogeCoin\wallet.dat" "$($paths['walletdatbkp'])$($timestamp)_wallet.dat" -Force

    #Move Existing Wallet
    Write-Host -ForegroundColor Green "Moving Current Wallet..."
    foreach($folder in (Get-ChildItem $paths['currentwallet'])){
        Move-Item -Path $folder.FullName -Destination "$($paths['oldwallets'])$($folder)_$timestamp"
    }

    #Define new wallet paths
    $newwalletzip = "$($paths['walletzips'])$choice"
    $newwalletfolder = "$($paths['currentwallet'])$($choice -replace '\.zip','\')"

    #Download file
    Write-Host -ForegroundColor Green "Downloading $choice..."
    $webclient.DownloadFile("https://github.com$($walletarray[$choice])", $newwalletzip)

    #Create a folder for the wallet
    if(!(Test-Path $newwalletfolder)){ New-Item -ItemType directory -Path $newwalletfolder | Out-Null }

    #Extract files from zip
    $shell = new-object -com shell.application
    $zip = $shell.NameSpace($newwalletzip)
    foreach($item in $zip.items()){ $shell.Namespace($newwalletfolder).copyhere($item) }

    #Create shortcut on desktop
    Write-Host -ForegroundColor Green "Creating Desktop Shortcut..."
    $wshshell = New-Object -ComObject WScript.Shell
    $desktop = [System.Environment]::GetFolderPath('Desktop')
    $lnk = $wshshell.CreateShortcut($desktop+"\DogeWallet.lnk") 
    $lnk.TargetPath = $newwalletfolder + "dogecoin-qt.exe"
    $lnk.Save()
}