Remove duplicate entries from Quicklaunch and Top Navigation (zine fame)

change the web URL in the attached powershell script file and run the script on powershell prompt.

RemoveDuplicateLinks.ps1.txt **********************************

#New version of the detect and removal script:
#  You put the affected site collections into a textfile -> sites.txt <- which is stored in the same path as the ps script 
#  It will check all sites of each site collection of the sites.txt file to see if there are duplicates in the QuickLaunch and/or TopNavigation (NEW!)
#  Logging to a logfile commented out as it was not efficient (filling up disk space) …   
#  Tool will still output everything to the cmd prompt.


# THIS CODE-SAMPLE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR 
# FITNESS FOR A PARTICULAR PURPOSE.
#
# This sample is not supported under any Microsoft standard support program or service. 
# The script is provided AS IS without warranty of any kind. Microsoft further disclaims all
# implied warranties including, without limitation, any implied warranties of merchantability
# or of fitness for a particular purpose. The entire risk arising out of the use or performance
# of the sample and documentation remains with you. In no event shall Microsoft, its authors,
# or anyone else involved in the creation, production, or delivery of the script be liable for 
# any damages whatsoever (including, without limitation, damages for loss of business profits, 
# business interruption, loss of business information, or other pecuniary loss) arising out of 
# the use of or inability to use the sample or documentation, even if Microsoft has been advised 
# of the possibility of such damages.
################################################################################################



Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

function tryDeleteNode
{
    param
    (
        $node,$dictionary,$nodeCollection
    )

    $title = $node.Title
    
               
                   if(!$dictionary.ContainsKey($title))
                   {
                       $dictionary.Add($node.Title,$node.Url)
                   }
                   else
                   {
                       if($dictionary[$title] -eq $node.Url)
                       {
                           if($node.Children.Count -eq 0)
                           {
                               echo "       -> Deleting Duplicate Node: $title" 
                               $nodeCollection.Delete($node)
                               $global:didDelete= $true
                                            $temp = (get-date).ToString() +";"+ ($site.Url) +";"+ ($title)
                                            echo "$temp"
                           }
                           else
                           {
                               echo "       -> Dupe Node $title has children, Skipping..."
                           }
                       }
                              else
                       {
                   echo "       -> Duplicate title $title found, but mismatched link, Skipping..."
                       }
                   }
               
}

function deleteNodesRecurse
{
    $nodes = @{}
    foreach($node in $quickLaunch)
    {
        $childNodes = @{}
        foreach($child in $node.Children)
        {
            tryDeleteNode -node $child -dictionary $childNodes -nodeCollection $node.Children
        }

        tryDeleteNode -node $node -dictionary $nodes -nodeCollection $quickLaunch
    }
}
function deleteGlobalNodesRecurse
{
    $nodes = @{}
    foreach($node in $gnavNodes)
    {
        $childNodes = @{}
        foreach($child in $node.Children)
        {
            tryDeleteNode -node $child -dictionary $childNodes -nodeCollection $node.Children
        }

        tryDeleteNode -node $node -dictionary $nodes -nodeCollection $gnavNodes
    }
}


#$affectedSiteCollections = get-content sites.txt
#foreach ($sitecoll in $affectedSiteCollections)
#{
#    $sitecoll = Get-SPSite "http://isgdev5:43007"
#    write-host "SiteCollection: " $sitecoll.URL 
#               write-host "SiteCollection: " $sitecoll.URL 
#               foreach ($site in $sitecoll.AllWebs) 
#               { 
$site = Get-SPWeb "http://portal.ibsplc.com/crgltr"
                       write-host " -> Site: " $site.URL 
                              do
                              {
                                            $quickLaunch = $site.Navigation.QuickLaunch
                                            $global:didDelete = $false
                                            deleteNodesRecurse
                                            $pub= [Microsoft.SharePoint.Publishing.PublishingWeb]::GetPublishingWeb($site)
                                            $gnavNodes = $pub.Navigation.GlobalNavigationNodes;
                                            deleteGlobalNodesRecurse
                              }
                              while($global:didDelete)
                              $site.Dispose()
#}
#               $sitecoll.Dispose()
#}