functions/Copy-DbaAgentOperator.ps1

function Copy-DbaAgentOperator {
    <#
        .SYNOPSIS
            Copy-DbaAgentOperator migrates operators from one SQL Server to another.
 
        .DESCRIPTION
            By default, all operators are copied. The -Operators parameter is auto-populated for command-line completion and can be used to copy only specific operators.
 
            If the associated credentials for the operator do not exist on the destination, it will be skipped. If the operator already exists on the destination, it will be skipped unless -Force is used.
 
        .PARAMETER Source
            Source SQL Server. You must have sysadmin access and server version must be SQL Server version 2000 or higher.
 
        .PARAMETER SourceSqlCredential
            Allows you to login to servers using SQL Logins instead of Windows Authentication (AKA Integrated or Trusted). To use:
 
            $scred = Get-Credential, then pass $scred object to the -SourceSqlCredential parameter.
 
            Windows Authentication will be used if SourceSqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
 
            To connect as a different Windows user, run PowerShell as that user.
 
        .PARAMETER Destination
            Destination SQL Server. You must have sysadmin access and the server must be SQL Server 2000 or higher.
 
        .PARAMETER DestinationSqlCredential
            Allows you to login to servers using SQL Logins instead of Windows Authentication (AKA Integrated or Trusted). To use:
 
            $dcred = Get-Credential, then pass this $dcred to the -DestinationSqlCredential parameter.
 
            Windows Authentication will be used if DestinationSqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
 
            To connect as a different Windows user, run PowerShell as that user.
 
        .PARAMETER Operator
            The operator(s) to process. This list is auto-populated from the server. If unspecified, all operators will be processed.
 
        .PARAMETER ExcludeOperator
            The operators(s) to exclude. This list is auto-populated from the server.
 
        .PARAMETER WhatIf
            If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run.
 
        .PARAMETER Confirm
            If this switch is enabled, you will be prompted for confirmation before executing any operations that change state.
         
        .PARAMETER Force
            If this switch is enabled, the Operator will be dropped and recreated on Destination.
 
        .PARAMETER Silent
            If this switch is enabled, the internal messaging functions will be silenced.
 
        .NOTES
            Tags: Migration, Agent, Operator
            Author: Chrissy LeMaire (@cl), netnerds.net
            Requires: sysadmin access on SQL Servers
 
            Website: https://dbatools.io
            Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
            License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0
 
        .LINK
            https://dbatools.io/Copy-DbaAgentOperator
 
        .EXAMPLE
            Copy-DbaAgentOperator -Source sqlserver2014a -Destination sqlcluster
 
            Copies all operators from sqlserver2014a to sqlcluster using Windows credentials. If operators with the same name exist on sqlcluster, they will be skipped.
 
        .EXAMPLE
            Copy-DbaAgentOperator -Source sqlserver2014a -Destination sqlcluster -Operator PSOperator -SourceSqlCredential $cred -Force
 
            Copies only the PSOperator operator from sqlserver2014a to sqlcluster using SQL credentials for sqlserver2014a and Windows credentials for sqlcluster. If an operator with the same name exists on sqlcluster, it will be dropped and recreated because -Force was used.
 
        .EXAMPLE
            Copy-DbaAgentOperator -Source sqlserver2014a -Destination sqlcluster -WhatIf -Force
 
            Shows what would happen if the command were executed using force.
    #>

    [CmdletBinding(DefaultParameterSetName = "Default", SupportsShouldProcess = $true)]
    param (
        [parameter(Mandatory = $true)]
        [DbaInstanceParameter]$Source,
        [PSCredential]
        $SourceSqlCredential,
        [parameter(Mandatory = $true)]
        [DbaInstanceParameter]$Destination,
        [PSCredential]
        $DestinationSqlCredential,
        [object[]]$Operator,
        [object[]]$ExcludeOperator,
        [switch]$Force,
        [switch]$Silent
    )

    begin {

        $sourceServer = Connect-SqlInstance -SqlInstance $Source -SqlCredential $SourceSqlCredential
        $destServer = Connect-SqlInstance -SqlInstance $Destination -SqlCredential $DestinationSqlCredential
        
        $serverOperator = $sourceServer.JobServer.Operators
        $destOperator = $destServer.JobServer.Operators
        
        $failsafe = $destServer.JobServer.AlertSystem | Select-Object FailSafeOperator
    }
    process {

        foreach ($sOperator in $serverOperator) {
            $operatorName = $sOperator.Name
            
            $copyOperatorStatus = [pscustomobject]@{
                SourceServer        = $sourceServer.Name
                DestinationServer   = $destServer.Name
                Name                = $operatorName
                Status              = $null
                DateTime            = [DbaDateTime](Get-Date)
            }
            
            if ($Operator -and $Operator -notcontains $operatorName -or $ExcludeOperator -in $operatorName) {
                continue 
            }
            
            if ($destOperator.Name -contains $sOperator.Name) {
                if ($force -eq $false) {
                    $copyOperatorStatus.Status = "Skipped"
                    $copyOperatorStatus
                    Write-Message -Level Warning -Message "Operator $operatorName exists at destination. Use -Force to drop and migrate."
                    continue
                }
                else {
                    if ($failsafe.FailSafeOperator -eq $operatorName) {
                        Write-Message -Level Warning -Message "$operatorName is the failsafe operator. Skipping drop."
                        continue
                    }
                    
                    if ($Pscmdlet.ShouldProcess($destination, "Dropping operator $operatorName and recreating")) {
                        try {
                            Write-Message -Level Verbose -Message "Dropping Operator $operatorName"
                            $destServer.JobServer.Operators[$operatorName].Drop()
                        }
                        catch {
                            $copyOperatorStatus.Status = "Failed"
                            $copyOperatorStatus
                            
                            Stop-Function -Message "Issue dropping operator" -Category InvalidOperation -InnerErrorRecord $_ -Target $destServer -Continue
                        }
                    }
                }
            }

            if ($Pscmdlet.ShouldProcess($destination, "Creating Operator $operatorName")) {
                try {
                    Write-Message -Level Verbose -Message "Copying Operator $operatorName"
                    $sql = $sOperator.Script() | Out-String
                    Write-Message -Level Debug -Message $sql
                    $destServer.Query($sql)
                    
                    $copyOperatorStatus.Status = "Successful"
                    $copyOperatorStatus
                }
                catch {
                    $copyOperatorStatus.Status = "Failed"
                    $copyOperatorStatus
                    Stop-Function -Message "Issue creating operator." -Category InvalidOperation -InnerErrorRecord $_ -Target $destServer
                }
            }
        }
    }
    end {
        Test-DbaDeprecation -DeprecatedOn "1.0.0" -Silent:$false -Alias Copy-SqlOperator
    }
}