MVC to Headless Content Updates with Sitecore Powershell

mvctoheadless.ps1

###################################################

# Update the following parameters before execution

###################################################
#Starting path in content tree
$startingPath = "master:\content\home"
$defaultLayoutPath = 'master:\layout\mysite\Default'

#Report only and not update any item
$reportOnly = $False;
$useFinalLayout = $True;

#Placeholder key old to new mapping
$placeholderMappings = @(
    @("main","page"),
    @("/main","/page"),
    @("/page content","/new content")
)

#Renderings id with name mapping
$renderingMappings = @(
 @("{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}","{yyyyyyyy-xxxx-xxxx-xxxx-xxxxxxxxxxxx}","Old component","New component")
)

# Get all items in the path
$items = Get-ChildItem -Path $startingPath -Recurse | Where-Object { (Get-Rendering -Item $_ -FinalLayout) -ne $null }

# Loop through each item
foreach ($item in $items) {
        # select default layout
        $defaultDevice = Get-LayoutDevice -Default
        $mobileDevice = Get-LayoutDevice -Name 'Mobile'
        
        # change the layout from what is in Standard values to the new one.
        $defaultLayout = Get-Item -Path $defaultLayoutPath
        
        if (!$reportOnly)
        {
            Set-Layout -Item $item -Device $defaultDevice -Layout $defaultLayout | Out-Null
        }
        Write-Host "Default Layout changed for $($item.Paths.Path)"
        
        $defaultPh = Get-PlaceholderSetting -Item $item -Key "main*" -Device $defaultDevice -FinalLayout
        if($null -ne $defaultPh){
            if (!$reportOnly){
                Remove-PlaceholderSetting -Item $item -Key "main*" -Device $defaultDevice -FinalLayout
            }
            Write-Host "Placeholder Main removed from default layout"
        }
        $mobileMainPh = Get-PlaceholderSetting -Item $item -Key "main*" -Device $mobileDevice -FinalLayout
        if($null -ne $mobileMainPh)
        {
            if (!$reportOnly){
                Remove-PlaceholderSetting -Item $item -Key "main*" -Device $mobileDevice -FinalLayout
            }
            Write-Host "Placeholder Main removed from Mobile layout"
        }
        $mobilepcPh = Get-PlaceholderSetting -Item $item -Key "pagecontainer*" -Device $mobileDevice -FinalLayout 
        if($null -ne $mobilepcPh)
        {
            if (!$reportOnly){
                Remove-PlaceholderSetting -Item $item -Key "pagecontainer*" -Device $mobileDevice -FinalLayout
            }
            Write-Host "Placeholder pagecontainer removed from Mobile layout"
        }
        
        ## Replace Renderings with mappings
        foreach( $renderMapping in $renderingMappings )
        {
            $sourceRenderingId = $renderMapping[0];
            $targetRenderingId = $renderMapping[1];
            $sourceRenderings = Get-Rendering -Item $item -Device $defaultDevice -FinalLayout | Where-Object { $_.ItemID -eq $sourceRenderingId }
            $targetRendering = Get-Item -Path "master:" -ID $targetRenderingId | New-Rendering
            
            # Replace all instances of the old rendering with the new rendering
            foreach($sourceRendering in $sourceRenderings) {
                if (!$reportOnly)
                {
                    $item | Switch-Rendering -Instance $sourceRendering -Device $defaultDevice -FinalLayout -NewRendering $targetRendering
                }
                 Write-Host "$($item.FullPath) - Switching Rendering : $($renderMapping[2]) --> $($renderMapping[3])"
            }
        }
        
        ## Replace Placeholders with mappings
        foreach( $mapping in $placeholderMappings )
        {
            # Get renderings in this item that have renderings in the placeholder we want to update 
            $renderings =  Get-Rendering -Item $item -Placeholder ($mapping[0] + '*') -Device $defaultDevice -FinalLayout:$useFinalLayout

            foreach ( $rendering in $renderings )
            {
                # Only update the rendering if we're not in "Report Only" mode
                if (!$reportOnly)
                {
                   # Update the placeholder in the rendering and set it back in the item
                   $rendering.Placeholder = $rendering.Placeholder -replace $mapping[0], $mapping[1]
                   Set-Rendering -Item $item -Instance $rendering -FinalLayout:$useFinalLayout
                }
                Write-Host "$($item.FullPath) - Rendering $($rendering.UniqueID) - Placeholder: $($mapping[0]) --> $($mapping[1])"
            }
        }
}

Write-Host "Script execution completed."