functions/Get-DbaAgentAlert.ps1

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FUNCTION Get-DbaAgentAlert
{
<#
.SYNOPSIS
Returns all SQL Agent alerts on a SQL Server Agent.
 
.DESCRIPTION
This function returns SQL Agent alerts.
 
.PARAMETER SqlInstance
SqlInstance name or SMO object representing the SQL Server to connect to.
This can be a collection and receive pipeline input.
 
.PARAMETER SqlCredential
PSCredential object to connect as. If not specified, currend Windows login will be used.
 
.NOTES
Author: Klaas Vandenberghe ( @PowerDBAKlaas )
Date: 2017-01-19
 
dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com)
Copyright (C) 2016 Chrissy LeMaire
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.    
 
.LINK
https://dbatools.io/Get-DbaAgentAlert
 
.EXAMPLE
Get-DbaAgentAlert -SqlInstance ServerA,ServerB\instanceB
Returns all SQL Agent alerts on serverA and serverB\instanceB
 
.EXAMPLE
'serverA','serverB\instanceB' | Get-DbaAgentAlert
Returns all SQL Agent alerts on serverA and serverB\instanceB
 
#>

    [CmdletBinding()]
    Param (
        [parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $True)]
        [Alias("ServerInstance", "Instance", "SqlServer")]
        [string[]]$SqlInstance,
        [PSCredential] [System.Management.Automation.CredentialAttribute()]$SqlCredential
    )
BEGIN {}
PROCESS
    {
        foreach ($instance in $SqlInstance)
        {
            try
            {
                Write-Verbose "Connecting to $instance"
                $server = Connect-SqlServer -SqlServer $instance -SqlCredential $sqlcredential
            }
            catch
            {
                Write-Warning "Failed to connect to $instance"
                continue
            }
            
            Write-Verbose "Getting Edition from $server"
            Write-Verbose "$server is a $($server.Edition)"
            if ( $server.Edition -like 'Express*' )
            {
            Write-Warning "There is no SQL Agent on $server, it's a $($server.Edition)"
            continue
            }
            $alerts = $server.Jobserver.Alerts
            
            if ( $alerts.count -lt 1)
            {
                Write-Verbose "No alerts on $server"
            }
            else
            {
                Write-Verbose "Getting SQL Agent Alerts on $server"
                foreach ($alert in $alerts)
                {
                    $LastOccurenceDate = $alert.LastOccurrenceDate
                    
                    if (((Get-Date) - $LastOccurenceDate).TotalDays -gt 36500)
                    {
                        $LastOccurenceDate = $null
                    }
                    
                    [pscustomobject]@{
                        ComputerName = $server.NetName
                        SqlInstance = $server.Name
                        InstanceName = $server.ServiceName
                        AlertName = $alert.Name
                        AlertID = $alert.ID
                        JobName = $alert.JobName
                        AlertType = $alert.AlertType
                        CategoryName = $alert.CategoryName
                        Severity = $alert.Severity
                        IsEnabled = $alert.IsEnabled
                        Notifications = $alert.EnumNotifications()
                        DelayBetweenResponses = $alert.delaybetweenresponses
                        LastOccurenceDate = $alert.LastOccurrenceDate
                        OccurrenceCount = $alert.OccurrenceCount
                    }
                }
            }
        }
    }
END    {}
}