functions/Get-DbatoolsConfig.ps1

function Get-DbatoolsConfig {
    <#
    .SYNOPSIS
        Retrieves configuration elements by name.
 
    .DESCRIPTION
        Retrieves configuration elements by name.
        Can be used to search the existing configuration list.
 
    .PARAMETER FullName
        Default: "*"
        Search for configurations using the full name
 
    .PARAMETER Name
        Default: "*"
        The name of the configuration element(s) to retrieve.
        May be any string, supports wildcards.
 
    .PARAMETER Module
        Default: "*"
        Search configuration by module.
 
    .PARAMETER Force
        Overrides the default behavior and also displays hidden configuration values.
 
    .NOTES
        Tags: Config, Module
        Author: Friedrich Weinmann (@FredWeinmann)
 
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
    .EXAMPLE
        PS C:\> Get-DbatoolsConfig 'Mail.To'
 
        Retrieves the configuration element for the key "Mail.To"
 
    .EXAMPLE
        PS C:\> Get-DbatoolsConfig -Force
 
        Retrieve all configuration elements from all modules, even hidden ones.
 
    #>

    [CmdletBinding(DefaultParameterSetName = "FullName")]
    param (
        [Parameter(ParameterSetName = "FullName", Position = 0)]
        [string]$FullName = "*",
        [Parameter(ParameterSetName = "Module", Position = 1)]
        [string]$Name = "*",
        [Parameter(ParameterSetName = "Module", Position = 0)]
        [string]$Module = "*",
        [switch]$Force
    )

    switch ($PSCmdlet.ParameterSetName) {
        "Module" {
            $Name = $Name.ToLowerInvariant()
            $Module = $Module.ToLowerInvariant()

            [Sqlcollaborative.Dbatools.Configuration.ConfigurationHost]::Configurations.Values | Where-Object { ($_.Name -like $Name) -and ($_.Module -like $Module) -and ((-not $_.Hidden) -or ($Force)) } | Sort-Object Module, Name
        }

        "FullName" {
            [Sqlcollaborative.Dbatools.Configuration.ConfigurationHost]::Configurations.Values | Where-Object { ("$($_.Module).$($_.Name)" -like $FullName) -and ((-not $_.Hidden) -or ($Force)) } | Sort-Object Module, Name
        }
    }
}