functions/Copy-DbaAgentSharedSchedule.ps1

function Copy-DbaAgentSharedSchedule {
    <#
        .SYNOPSIS
            Copy-DbaAgentSharedSchedule migrates shared job schedules from one SQL Server to another.
 
        .DESCRIPTION
            By default, all shared job schedules are copied. The -SharedSchedules parameter is auto-populated for command-line completion and can be used to copy only specific shared job schedules.
 
            If the associated credential for the account does not exist on the destination, it will be skipped. If the shared job schedule 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 greater.
 
        .PARAMETER SourceSqlCredential
            Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use:
 
            $scred = Get-Credential, then pass $scred object to the -SourceSqlCredential 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 Destination
            Destination Sql Server. You must have sysadmin access and server version must be SQL Server version 2000 or greater.
 
        .PARAMETER DestinationSqlCredential
            Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/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 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 Force
            Drops and recreates the schedule if it exists.
 
        .PARAMETER Silent
            If this switch is enabled, the internal messaging functions will be silenced.
 
        .NOTES
            Tags: Migration, Agent
            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-DbaAgentSharedSchedule
 
        .EXAMPLE
            Copy-DbaAgentSharedSchedule -Source sqlserver2014a -Destination sqlcluster
 
            Copies all shared job schedules from sqlserver2014a to sqlcluster, using Windows credentials. If shared job schedules with the same name exist on sqlcluster, they will be skipped.
 
        .EXAMPLE
            Copy-DbaAgentSharedSchedule -Source sqlserver2014a -Destination sqlcluster -SharedSchedule Weekly -SourceSqlCredential $cred -Force
 
            Copies a single shared job schedule, the Weekly shared job schedule from sqlserver2014a to sqlcluster, using SQL credentials for sqlserver2014a and Windows credentials for sqlcluster. If a shared job schedule with the same name exists on sqlcluster, it will be dropped and recreated because -Force was used.
 
        .EXAMPLE
            Copy-DbaAgentSharedSchedule -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]
        $DestinationSqlCredential,
        [switch]$Force,
        [switch]$Silent
    )

    begin {
        $sourceServer = Connect-SqlInstance -SqlInstance $Source -SqlCredential $SourceSqlCredential
        $destServer = Connect-SqlInstance -SqlInstance $Destination -SqlCredential $DestinationSqlCredential

        $source = $sourceServer.DomainInstanceName
        $destination = $destServer.DomainInstanceName

        if ($sourceServer.VersionMajor -lt 9 -or $destServer.VersionMajor -lt 9) {
            throw "Server SharedSchedules are only supported in SQL Server 2005 and above. Quitting."
        }

        $serverSchedules = $sourceServer.JobServer.SharedSchedules
        $destSchedules = $destServer.JobServer.SharedSchedules
    }
    process {
        foreach ($schedule in $serverSchedules) {
            $scheduleName = $schedule.Name
            $copySharedScheduleStatus = [pscustomobject]@{
                SourceServer        = $sourceServer.Name
                DestinationServer   = $destServer.Name
                Name                = $scheduleName
                Status              = $null
                DateTime            = [Sqlcollaborative.Dbatools.Utility.DbaDateTime](Get-Date)
            }

            if ($schedules.Length -gt 0 -and $schedules -notcontains $scheduleName) {
                continue
            }

            if ($destSchedules.Name -contains $scheduleName) {
                if ($force -eq $false) {
                    $copySharedScheduleStatus.Status = "Skipped"
                    $copySharedScheduleStatus
                    Write-Message -Level Warning -Message "Shared job schedule $scheduleName exists at destination. Use -Force to drop and migrate."
                    continue
                }
                else {
                    if ($destServer.JobServer.Jobs.JobSchedules.Name -contains $scheduleName) {
                        $copySharedScheduleStatus.Status = "Skipped"
                        $copySharedScheduleStatus
                        Write-Message -Level Warning -Message "Schedule [$scheduleName] has associated jobs. Skipping."
                        continue
                    }
                    else {
                        if ($Pscmdlet.ShouldProcess($destination, "Dropping schedule $scheduleName and recreating")) {
                            try {
                                Write-Message -Level Verbose -Message "Dropping schedule $scheduleName"
                                $destServer.JobServer.SharedSchedules[$scheduleName].Drop()
                            }
                            catch {
                                $copySharedScheduleStatus.Status = "Failed"
                                $copySharedScheduleStatus
                                Stop-Function -Message "Issue dropping schedule" -Target $scheduleName -InnerErrorRecord $_ -Continue
                            }
                        }
                    }
                }
            }

            if ($Pscmdlet.ShouldProcess($destination, "Creating schedule $scheduleName")) {
                try {
                    Write-Message -Level Verbose -Message "Copying schedule $scheduleName"
                    $sql = $schedule.Script() | Out-String

                    Write-Message -Level Debug -Message $sql
                    $destServer.Query($sql)

                    $copySharedScheduleStatus.Status = "Successful"
                    $copySharedScheduleStatus
                }
                catch {
                    $copySharedScheduleStatus.Status = "Failed"
                    $copySharedScheduleStatus
                    Stop-Function -Message "Issue creating schedule" -Target $scheduleName -InnerErrorRecord $_ -Continue
                }
            }
        }
    }
    end {
        Test-DbaDeprecation -DeprecatedOn "1.0.0" -Silent:$false -Alias Copy-SqlSharedSchedule
    }
}