Remove-KeyNameValue.ps1

function Remove-KeyNameValue {
<#
.SYNOPSIS
Removes a KNV entry from the KNV store.
 
.DESCRIPTION
Removes a KNV entry from the KNV store.
 
The Cmdlet lets you remove an existing entry from the KNV store.
 
.EXAMPLE
Remove-KeyNameValue myKey myName myValue -Confirm
 
Removes the KNV myKey/myName/myValue with explicit confirmation.
#>

[CmdletBinding(
    SupportsShouldProcess = $true
    ,
    ConfirmImpact = 'High'
    ,
    HelpURI = 'http://dfch.biz/biz/dfch/PS/Appclusive/Client/Remove-KeyNameValue/'
)]
Param 
(
    # The key name portion of the KNV to remove
    [Parameter(Mandatory = $false, Position = 0, ParameterSetName = 'name')]
    [string] $Key
    ,
    # The name name portion of the KNV to remove
    [Parameter(Mandatory = $false, Position = 1, ParameterSetName = 'name')]
    [string] $Name
    ,
    # The value name portion of the KNV to remove
    [Parameter(Mandatory = $false, Position = 2, ParameterSetName = 'name')]
    [string] $Value
    ,
    # Service reference to Appclusive
    [Parameter(Mandatory = $false)]
    [Alias('Services')]
    [hashtable] $svc = (Get-Variable -Name $MyInvocation.MyCommand.Module.PrivateData.MODULEVAR -ValueOnly).Services
    ,
    # Specifies the return format of the Cnmdlet
    [ValidateSet('default', 'json', 'json-pretty', 'xml', 'xml-pretty')]
    [Parameter(Mandatory = $false)]
    [alias('ReturnFormat')]
    [string] $As = 'default'
)

Begin 
{
    trap { Log-Exception $_; break; }

    $datBegin = [datetime]::Now;
    [string] $fn = $MyInvocation.MyCommand.Name;
    Log-Debug -fn $fn -msg ("CALL. svc '{0}'. Name '{1}'." -f ($svc -is [Object]), $Name) -fac 1;

    # Parameter validation
    Contract-Requires ($svc.Core -is [biz.dfch.CS.Appclusive.Api.Core.Core]) "Connect to the server before using the Cmdlet"
}
# Begin

Process 
{
    trap { Log-Exception $_; break; }

    # Default test variable for checking function response codes.
    [Boolean] $fReturn = $false;
    # Return values are always and only returned via OutputParameter.
    $OutputParameter = $null;

    $Exp = @();
    if($Key) 
    { 
        $Exp += ("(tolower(Key) eq '{0}')" -f $Key.ToLower());
    }
    if($Name) 
    { 
        $Exp += ("(tolower(Name) eq '{0}')" -f $Name.ToLower());
    }
    if($Value) 
    { 
        $Exp += ("(tolower(Value) eq '{0}')" -f $Value.ToLower());
    }
    $FilterExpression = [String]::Join(' and ', $Exp);

    $knv = $svc.Core.KeyNameValues.AddQueryOption('$filter',$FilterExpression);
    $r = @();
    
    $keyNameValueExists = $false;
    foreach($item in $knv) 
    {
        $keyNameValueExists = $true;
        $itemString = '{0}/{1}/{2}' -f $item.Key, $item.Name, $item.Value;
        if($PSCmdlet.ShouldProcess($itemString)) 
        {
            $r += ($item | Select -Property Key, Name, Value);
            Log-Notice $fn ("Removing '{0}' ..." -f $itemString);
            $svc.Core.DeleteObject($item);
            $null = $svc.Core.SaveChanges();
        }
    }
    Contract-Assert ($keyNameValueExists)

    $OutputParameter = Format-ResultAs $r $As
    $fReturn = $true;
}
# Process

End 
{
    $datEnd = [datetime]::Now;
    Log-Debug -fn $fn -msg ("RET. fReturn: [{0}]. Execution time: [{1}]ms. Started: [{2}]." -f $fReturn, ($datEnd - $datBegin).TotalMilliseconds, $datBegin.ToString('yyyy-MM-dd HH:mm:ss.fffzzz')) -fac 2;

    # Return values are always and only returned via OutputParameter.
    return $OutputParameter;
}
# End

}
if($MyInvocation.ScriptName) { Export-ModuleMember -Function Remove-KeyNameValue; } 

#
# Copyright 2014-2015 d-fens GmbH
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

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