icinga-powershell-framework/lib/config/Test-IcingaPowerShellConfigItem.psm1

<#
.SYNOPSIS
   Test if a config entry on an object is already present
.DESCRIPTION
   Test if a config entry on an object is already present
.FUNCTIONALITY
   Test if a config entry on an object is already present
.EXAMPLE
   PS>Test-IcingaPowerShellConfigItem -ConfigObject $PSObject -ConfigKey 'keyname';
.PARAMETER ConfigObject
   The custom config object to check for
.PARAMETER ConfigKey
   The key which is checked
.INPUTS
   System.String
.OUTPUTS
   System.Boolean
.LINK
   https://github.com/Icinga/icinga-powershell-framework
#>

function Test-IcingaPowerShellConfigItem()
{
    param (
        $ConfigObject,
        $ConfigKey
    );

    if ($null -eq $ConfigObject -Or [string]::IsNullOrEmpty($ConfigKey)) {
        return $FALSE;
    }

    foreach ($entry in $ConfigObject.PSObject.Properties) {
        if ($entry.Name.ToLower() -eq $ConfigKey.ToLower()) {
            return $TRUE;
        }
    }

    return $FALSE;
}