Function for writing to a log file in plain format, with the option to write the information to the host as well

Write-SimpleLog.ps1

[CmdletBinding()]
param()

#region FUNCTIONS
function New-SimpleLog
{
    <#
    .SYNOPSIS
        Write information to a log file and optionally to the console
    .LINK
        https://gist.github.com/dancing-groot/6af20a68e67306762905665db339d30d
    .NOTES
        Version:    2025.05.06
        Author:     @dancing-groot
    #>
    [cmdletbinding()]
    param (
        [string]$LogFile = "$($ENV:TEMP)\$((Split-Path -Leaf $script:MyInvocation.MyCommand.Path).Trim('.ps1'))-$(Get-Date -UFormat '%Y.%m.%d')-$(Get-Date -UFormat '%H%M').log",

        [ValidateSet('Log', 'Console', 'All')]
        [string]$WriteTo = "Log"
    )

    if ($script:PSBoundParameters['Verbose']) { $script:VerbosePreference = 'Continue' }
    if ($script:PSBoundParameters['Debug']) { $script:DebugPreference = 'Continue' }

    if ((Test-Path -LiteralPath (Split-Path $LogFile -Parent)) -eq $false) { New-Item -Path (Split-Path $LogFile -Parent) -Type Directory }

    return @{Path = $LogFile; WriteTo = $WriteTo }
} # New-SimpleLog

function Write-SimpleLog
{
    <#
    .SYNOPSIS
        Write information to a log file and optionally to the console
    .LINK
        https://gist.github.com/dancing-groot/6af20a68e67306762905665db339d30d
    .NOTES
        Version:    2025.04.15
        Author:     @dancing-groot
    #>
    [cmdletbinding()]
    param (
        [parameter(Mandatory = $true)]
        [string]$Path,

        [parameter(Mandatory = $true)]
        [string]$Message,

        [ValidateSet('Warning', 'Error', 'Verbose', 'Debug', 'Information', 'Info')] 
        [string]$Type = "Info",

        [ValidateSet('Log', 'Console', 'All')]
        [string]$WriteTo = "Log"
    )

    $content = "$(Get-Date -UFormat '%Y.%m.%d %T')" + "`t" + `
        $Type + "`t" + `
        $Message

    # Write the line to the log file

    switch ($true)
    {
        ($WriteTo -in @('Console', 'All'))
        {
            switch ($type)
            {
                "Info" { Write-Information $Message -InformationAction Continue; break }
                "Infomration" { Write-Information $Message -InformationAction Continue; break }
                "Warning" { Write-Warning $Message -WarningAction Continue; break }
                "Error" { Write-Host "ERROR: $Message" -ForegroundColor Red; break }
                "Verbose" { Write-Verbose $Message; break }
                "Debug" { Write-Debug $Message; break }
            }
        }
        ($WriteTo -in @('Log', 'All'))
        {
            switch ($type)
            {
                "Info" { Add-Content -LiteralPath $Path -Value $content; break }
                "Infomration" { Add-Content -LiteralPath $Path -Value $content; break }
                "Warning" { Add-Content -LiteralPath $Path -Value $content; break }
                "Error" { Add-Content -LiteralPath $Path -Value $content; break }
                "Verbose" { if ($script:PSBoundParameters['Verbose']) { Add-Content -LiteralPath $Path -Value $content; break } }
                "Debug" { if ($script:PSBoundParameters['Debug']) { Add-Content -LiteralPath $Path -Value $content; break } }
            }
        }
    }
} # Write-SimpleLog
#endregion FUNCTIONS

#region DECLARATION
$LogFile = "$PSScriptRoot\MyTestlog.log"
$LogParams = New-SimpleLog -LogFile $LogFile -WriteTo All
# or use the line below to use the default values (a generated log file name in the user's TEMP folder and write to the log file only)
#$LogParams = New-SimpleLog
#endregion DECLARATION

#region TESTING
Write-SimpleLog @LogParams -Message "This is an Information message"
Write-SimpleLog @LogParams -Message "This is a Debug message" -Type Debug
Write-SimpleLog @LogParams -Message "This is a Verbose message" -Type Verbose
Write-SimpleLog @LogParams -Message "This is a Warning message" -Type Warning
Write-SimpleLog @LogParams -Message "This is an Error message" -Type Error
#region TESTING