Powershell script to convert an image to base64 data uri format and store in a text file

ImgToBase64.ps1

function ImageToBase64 {
    Param([String]$path)

    [bool]$valid = ($path -ne "")
    if ($valid) {
        [String[]]$elements = $path.split(".")
        [int]$max = $elements.Count - 1
        [String]$ext = $elements[$max]
        [String]$uri = "data:image/$($ext);base64,"
        $elements[$max] = "txt"
        [String]$txtPath = $elements -join "."
   
        if (!(Test-Path $path)) {
            echo ""
            echo "Unable to find image file: $path"
            break
        }

        if ((Test-Path $txtPath)) {
            echo ""
            echo "Output file already exists: $txtPath, clearing file"
            Clear-Content $txtPath
        }
    }
    else {
        break
    }
    [String]$base64 = [convert]::ToBase64String((Get-Content $path -encoding byte))
    Write-Output ($uri + $base64) >> $txtPath 
}