functions/Copy-DbaPolicyManagement.ps1

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function Copy-DbaPolicyManagement {
    <#
        .SYNOPSIS
            Migrates SQL Policy Based Management Objects, including both policies and conditions.
 
        .DESCRIPTION
            By default, all policies and conditions are copied. If an object already exist on the destination, it will be skipped unless -Force is used.
 
            The -Policy and -Condition parameters are auto-populated for command-line completion and can be used to copy only specific objects.
 
        .PARAMETER Source
            Source SQL Server.You must have sysadmin access and server version must be SQL Server version 2008 or higher.
 
        .PARAMETER SourceSqlCredential
            Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
        .PARAMETER Destination
            Destination Sql Server. You must have sysadmin access and server version must be SQL Server version 2008 or higher.
 
        .PARAMETER DestinationSqlCredential
            Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
        .PARAMETER Policy
            The policy(ies) to process - this list is auto-populated from the server. If unspecified, all policies will be processed.
 
        .PARAMETER ExcludePolicy
            The policy(ies) to exclude - this list is auto-populated from the server
 
        .PARAMETER Condition
            The condition(s) to process - this list is auto-populated from the server. If unspecified, all conditions will be processed.
 
        .PARAMETER ExcludeCondition
            The condition(s) to exclude - this list is auto-populated from the server
 
        .PARAMETER Force
            If policies exists on destination server, it will be dropped and recreated.
 
        .PARAMETER WhatIf
            Shows what would happen if the command were to run. No actions are actually performed.
 
        .PARAMETER Confirm
            Prompts you for confirmation before executing any changing operations within the command.
 
        .PARAMETER EnableException
            By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
            This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
            Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
        .NOTES
            Tags: Migration
            Author: Chrissy LeMaire (@cl), netnerds.net
            Requires: sysadmin access on SQL Servers
 
            Website: https://dbatools.io
            Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
            License: MIT https://opensource.org/licenses/MIT
 
        .LINK
            https://dbatools.io/Copy-DbaPolicyManagement
 
        .EXAMPLE
            Copy-DbaPolicyManagement -Source sqlserver2014a -Destination sqlcluster
 
            Copies all policies and conditions from sqlserver2014a to sqlcluster, using Windows credentials.
 
        .EXAMPLE
            Copy-DbaPolicyManagement -Source sqlserver2014a -Destination sqlcluster -SourceSqlCredential $cred
 
            Copies all policies and conditions from sqlserver2014a to sqlcluster, using SQL credentials for sqlserver2014a and Windows credentials for sqlcluster.
 
        .EXAMPLE
            Copy-DbaPolicyManagement -Source sqlserver2014a -Destination sqlcluster -WhatIf
 
            Shows what would happen if the command were executed.
 
        .EXAMPLE
            Copy-DbaPolicyManagement -Source sqlserver2014a -Destination sqlcluster -Policy 'xp_cmdshell must be disabled'
 
            Copies only one policy, 'xp_cmdshell must be disabled' from sqlserver2014a to sqlcluster. No conditions are migrated.
    #>

    [CmdletBinding(DefaultParameterSetName = "Default", SupportsShouldProcess = $true)]
    param (
        [parameter(Mandatory)]
        [DbaInstanceParameter]$Source,
        [PSCredential]
        $SourceSqlCredential,
        [parameter(Mandatory)]
        [DbaInstanceParameter[]]$Destination,
        [PSCredential]
        $DestinationSqlCredential,
        [object[]]$Policy,
        [object[]]$ExcludePolicy,
        [object[]]$Condition,
        [object[]]$ExcludeCondition,
        [switch]$Force,
        [Alias('Silent')]
        [switch]$EnableException
    )

    begin {
        try {
            Write-Message -Level Verbose -Message "Connecting to $Source"
            $sourceServer = Connect-SqlInstance -SqlInstance $Source -SqlCredential $SourceSqlCredential -MinimumVersion 10
        }
        catch {
            Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $Source
            return
        }
        $sourceSqlConn = $sourceServer.ConnectionContext.SqlConnectionObject
        $sourceSqlStoreConnection = New-Object Microsoft.SqlServer.Management.Sdk.Sfc.SqlStoreConnection $sourceSqlConn
        $sourceStore = New-Object  Microsoft.SqlServer.Management.DMF.PolicyStore $sourceSqlStoreConnection
        $storePolicies = $sourceStore.Policies | Where-Object { $_.IsSystemObject -eq $false }
        $storeConditions = $sourceStore.Conditions | Where-Object { $_.IsSystemObject -eq $false }
    }
    process {
        if (Test-FunctionInterrupt) { return }
        foreach ($destinstance in $Destination) {
            try {
                Write-Message -Level Verbose -Message "Connecting to $destinstance"
                $destServer = Connect-SqlInstance -SqlInstance $destinstance -SqlCredential $DestinationSqlCredential -MinimumVersion 10
            }
            catch {
                Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $destinstance -Continue
            }
            $destSqlConn = $destServer.ConnectionContext.SqlConnectionObject
            $destSqlStoreConnection = New-Object Microsoft.SqlServer.Management.Sdk.Sfc.SqlStoreConnection $destSqlConn
            $destStore = New-Object  Microsoft.SqlServer.Management.DMF.PolicyStore $destSqlStoreConnection
            
            if ($Policy) {
                $storePolicies = $storePolicies | Where-Object Name -In $Policy
            }
            if ($ExcludePolicy) {
                $storePolicies = $storePolicies | Where-Object Name -NotIn $ExcludePolicy
            }
            if ($Condition) {
                $storeConditions = $storeConditions | Where-Object Name -In $Condition
            }
            if ($ExcludeCondition) {
                $storeConditions = $storeConditions | Where-Object Name -NotIn $ExcludeCondition
            }
            
            if ($Policy -and $Condition) {
                $storeConditions = $null
                $storePolicies = $null
            }
            
        <#
                        Conditions
        #>

            
            Write-Message -Level Verbose -Message "Migrating conditions"
            foreach ($condition in $storeConditions) {
                $conditionName = $condition.Name
                
                $copyConditionStatus = [pscustomobject]@{
                    SourceServer = $sourceServer.Name
                    DestinationServer = $destServer.Name
                    Name         = $conditionName
                    Type         = "Policy Condition"
                    Status       = $null
                    Notes        = $null
                    DateTime     = [DbaDateTime](Get-Date)
                }
                
                if ($null -ne $destStore.Conditions[$conditionName]) {
                    if ($force -eq $false) {
                        Write-Message -Level Verbose -Message "condition '$conditionName' was skipped because it already exists on $destinstance. Use -Force to drop and recreate"
                        
                        $copyConditionStatus.Status = "Skipped"
                        $copyConditionStatus.Notes = "Already exists"
                        $copyConditionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                        continue
                    }
                    else {
                        if ($Pscmdlet.ShouldProcess($destinstance, "Attempting to drop $conditionName")) {
                            Write-Message -Level Verbose -Message "Condition '$conditionName' exists on $destinstance. Force specified. Dropping $conditionName."
                            
                            try {
                                $dependentPolicies = $destStore.Conditions[$conditionName].EnumDependentPolicies()
                                foreach ($dependent in $dependentPolicies) {
                                    $dependent.Drop()
                                    $destStore.Conditions.Refresh()
                                }
                                $destStore.Conditions[$conditionName].Drop()
                            }
                            catch {
                                $copyConditionStatus.Status = "Failed"
                                $copyConditionStatus.Notes = (Get-ErrorMessage -Record $_).Message
                                $copyConditionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                                Stop-Function -Message "Issue dropping condition on $destinstance" -Target $conditionName -ErrorRecord $_ -Continue
                            }
                        }
                    }
                }
                
                if ($Pscmdlet.ShouldProcess($destinstance, "Migrating condition $conditionName")) {
                    try {
                        $sql = $condition.ScriptCreate().GetScript() | Out-String
                        Write-Message -Level Debug -Message $sql
                        Write-Message -Level Verbose -Message "Copying condition $conditionName"
                        $null = $destServer.Query($sql)
                        $destStore.Conditions.Refresh()
                        
                        $copyConditionStatus.Status = "Successful"
                        $copyConditionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                    }
                    catch {
                        $copyConditionStatus.Status = "Failed"
                        $copyConditionStatus.Notes = (Get-ErrorMessage -Record $_).Message
                        $copyConditionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                        
                        Stop-Function -Message "Issue creating condition on $destinstance" -Target $conditionName -ErrorRecord $_
                    }
                }
            }
            
        <#
                        Policies
        #>

            
            Write-Message -Level Verbose -Message "Migrating policies"
            foreach ($policy in $storePolicies) {
                $policyName = $policy.Name
                
                $copyPolicyStatus = [pscustomobject]@{
                    SourceServer = $sourceServer.Name
                    DestinationServer = $destServer.Name
                    Name         = $policyName
                    Type         = "Policy"
                    Status       = $null
                    Notes        = $null
                    DateTime     = [DbaDateTime](Get-Date)
                }
                
                if ($null -ne $destStore.Policies[$policyName]) {
                    if ($force -eq $false) {
                        Write-Message -Level Verbose -Message "Policy '$policyName' was skipped because it already exists on $destinstance. Use -Force to drop and recreate"
                        
                        $copyPolicyStatus.Status = "Skipped"
                        $copyPolicyStatus.Notes = "Already exists"
                        $copyPolicyStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                        continue
                    }
                    else {
                        if ($Pscmdlet.ShouldProcess($destinstance, "Attempting to drop $policyName")) {
                            Write-Message -Level Verbose -Message "Policy '$policyName' exists on $destinstance. Force specified. Dropping $policyName."
                            
                            try {
                                $destStore.Policies[$policyName].Drop()
                                $destStore.Policies.refresh()
                            }
                            catch {
                                $copyPolicyStatus.Status = "Failed"
                                $copyPolicyStatus.Notes = (Get-ErrorMessage -Record $_).Message
                                $copyPolicyStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                                
                                Stop-Function -Message "Issue dropping policy on $destinstance" -Target $policyName -ErrorRecord $_ -Continue
                            }
                        }
                    }
                }
                
                if ($Pscmdlet.ShouldProcess($destinstance, "Migrating policy $policyName")) {
                    try {
                        $destStore.Conditions.Refresh()
                        $destStore.Policies.Refresh()
                        $sql = $policy.ScriptCreateWithDependencies().GetScript() | Out-String
                        Write-Message -Level Debug -Message $sql
                        Write-Message -Level Verbose -Message "Copying policy $policyName"
                        $null = $destServer.Query($sql)
                        
                        $copyPolicyStatus.Status = "Successful"
                        $copyPolicyStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                    }
                    catch {
                        $copyPolicyStatus.Status = "Failed"
                        $copyPolicyStatus.Notes = (Get-ErrorMessage -Record $_).Message
                        $copyPolicyStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                        
                        # This is usually because of a duplicate dependent from above. Just skip for now.
                        Stop-Function -Message "Issue creating policy on $destinstance" -Target $policyName -ErrorRecord $_ -Continue
                    }
                }
            }
        }
    }
    end {
        Test-DbaDeprecation -DeprecatedOn "1.0.0" -EnableException:$false -Alias Copy-SqlPolicyManagement
        Test-DbaDeprecation -DeprecatedOn "1.0.0" -EnableException:$false -Alias Copy-DbaSqlPolicyManagement
    }
}