setup/powershell/Alerts.ps1

<#
.SYNOPSIS
This Script will check all of the instances in the InstanceList and gather the Alerts Information to the info.Alerts table

.DESCRIPTION
This Script will check all of the instances in the InstanceList and gather the Alerts Information to the info.Alerts table

.NOTES
dbareports PowerShell module (https://dbareports.io, SQLDBAWithABeard.com)
Copyright (C) 2016 Rob Sewell

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/>.

#>

[CmdletBinding()]
Param (
    [Alias("ServerInstance", "SqlInstance")]
    [object]$SqlServer = "--installserver--",
    [object]$SqlCredential,
    [string]$InstallDatabase = "--installdb--",
    [string]$LogFileFolder = "--logdir--"
)

BEGIN
{
    # Load up shared functions
    $currentdir = Split-Path -Parent $MyInvocation.MyCommand.Definition
    . "$currentdir\shared.ps1"
    . "$currentdir\Write-Log.ps1"
    # Create Log File
    $Date = Get-Date -Format yyyyMMdd_HHmmss
    $LogFilePath = $LogFileFolder + '\' + 'dbareports_Alerts_' + $Date + '.txt'
    try
    {
        New-item -Path $LogFilePath -itemtype File -ErrorAction Stop 
        Write-Log -path $LogFilePath -message "Alerts Job started" -level info
    }
    catch
    {
        Write-error "Failed to create Log File at $LogFilePath"
    }
        
    # Specify table name that we'll be inserting into
    $table = "info.Alerts"
    $schema,$tablename = $table.Split(".")
    
    # Connect to dbareports server
    try
    {
        Write-Log -path $LogFilePath -message "Connecting to $sqlserver" -level info
        $sourceserver = Connect-SqlServer -SqlServer $sqlserver -SqlCredential $SqlCredential -ErrorAction Stop 
    }
    catch
    {
        Write-Log -path $LogFilePath -message "Failed to connect to $sqlserver - $_" -level Error
    }

    # Get columns automatically from the table on the SQL Server
    # and creates the necessary $script:datatable with it
    try
    {
        Write-Log -path $LogFilePath -message "Intitialising Datatable" -level info
        Initialize-DataTable -ErrorAction Stop 
    }
    catch
    {
        Write-Log -path $LogFilePath -message "$datatable" -level Error
        Write-Log -path $LogFilePath -message "Failed to initialise Data Table - $_" -level Error
        Break
    }
    
}

PROCESS
{
    $DateChecked = Get-Date
    try
    {
        Write-Log -path $LogFilePath -message "Getting Instances from $sqlserver" -level info
        $sqlservers = Get-Instances
    }
    catch
    {
        Write-Log -path $LogFilePath -message " Failed to get instances - $_" -level Error
        break
    }

    # Get list of all Alerts already in the database
    try
    {
        Write-Log -path $LogFilePath -message "Getting a list of alerts from the dbareports database" -level info
        $sql = "SELECT AlertsID, Name, InstanceID FROM $table"
        $ExistingAlerts = $sourceserver.Databases[$InstallDatabase].ExecuteWithResults($sql).Tables[0]
        Write-Log -path $LogFilePath -message "Got the list of alerts from the dbareports database" -level info
    }
    catch
    {
        Write-Log -path $LogFilePath -message "Can't get alerts list from $InstallDatabase on $($sourceserver.name). - $_" -level Error
        Write-Log -path $LogFilePath -message "$_.Exception" -Level Error
        Write-Log -path $LogFilePath -message "$_.Exception.InnerException" -Level Error
    }
    
    foreach ($sqlserver in $sqlservers)
    {
        $sqlservername = $sqlserver.ServerName
        $InstanceName = $sqlserver.InstanceName
        $InstanceId = $sqlserver.InstanceId
        if ($InstanceName -eq 'MSSQLServer')
        {
            $Connection = $sqlservername
        }
        else
        {
            $Connection = "$sqlservername\$InstanceName"
        }
        
        # Connect to Instance
        try
        {
            $server = Connect-SqlServer -SqlServer $Connection
            Write-Log -path $LogFilePath -message "Connecting to $Connection" -level info
        }
        catch
        {
            Write-Log -path $LogFilePath -message "Failed to connect to $Connection - $_" -level Warn
            continue
        }
        
        foreach($Alert in $server.JobServer.Alerts)

         {

            $LastOccurrenceDate = $Alert.LastOccurrenceDate
            if ($LastOccurrenceDate -eq '01/01/0001 00:00:00') 
            { 
                $LastOccurrenceDate = $null 
            } 

            $LastResponseDate =  $Alert.LastResponseDate
            if ($LastResponseDate -eq '01/01/0001 00:00:00') 
            { 
                $LastResponseDate = $null 
            } 

            if($Alert.WmiEventQuery)
            {
                $WmiEventQuery = $Alert.WmiEventQuery.Replace("'","''")
            }

            # Check for existing alerts
            $record = $ExistingAlerts| Where-Object { $_.Name -eq $Alert.name -and $_.InstanceId -eq $InstanceID }
            $key = $record.AlertsID
            $update = $true
            
            if ($key.count -eq 0)
            {
                $update = $false
            }

            try
            {
                $null = $datatable.rows.Add(
                $key,
                $DateChecked,
                $InstanceID,
                $($Alert.Name),
                $($Alert.Category),
                 $($Alert.DatabaseID),
                 $($Alert.DelayBetweenResponses),
                 $($Alert.EventDescriptionKeyword),
                 $($Alert.EventSource),
                 $($Alert.HasNotification),
                 $($Alert.IncludeEventDescription),
                 $($Alert.IsEnabled),
                 $($Alert.AgentJobDetailID),
                 $($LastOccurrenceDate),
                 $($LastResponseDate),
                 $($Alert.MessageID),
                 $($Alert.NotificationMessage),
                 $($Alert.OccurrenceCount),
                 $($Alert.PerformanceCondition),
                 $($Alert.Severity),
                 $($Alert.WmiEventNamespace),
                 $($Alert.WmiEventQuery),
                $Update
                )
            }
            catch
            {
                Write-Log -path $LogFilePath -Message "Failed to add Alert Information to the datatable - $_" -Level Error
                Write-Log -path $LogFilePath -Message "Data is $key,
                $DateChecked,
                $InstanceID,
                $($Alert.Name),
                $($Alert.Category),
                 $($Alert.DatabaseID),
                 $($Alert.DelayBetweenResponses),
                 $($Alert.EventDescriptionKeyword),
                 $($Alert.EventSource),
                 $($Alert.HasNotification),
                 $($Alert.IncludeEventDescription),
                 $($Alert.IsEnabled),
                 $($Alert.AgentJobDetailID),
                 $($Alert.LastOccurrenceDate),
                 $($Alert.LastResponseDate),
                 $($Alert.MessageID),
                 $($Alert.NotificationMessage),
                 $($Alert.OccurrenceCount),
                 $($Alert.PerformanceCondition),
                 $($Alert.Severity),
                 $($Alert.WmiEventNamespace),
                 $($Alert.WmiEventQuery),
                $Update"

                continue
            }
        } #End foreach ALerts
    }#End foreach Servers
    $rowcount = $datatable.Rows.Count
    
    if ($rowcount -eq 0)
    {
        Write-Log -path $LogFilePath -message "No rows returned. No update required." -level info
        continue
    }
    
    try
    {
        Write-Log -path $LogFilePath -message "Attempting Import of $rowcount row(s)" -level info
        Write-Tvp -ErrorAction Stop 
        Write-Log -path $LogFilePath -message "Successfully Imported $rowcount row(s) of Alerts into the $InstallDatabase on $($sourceserver.name)" -level info
    }
    catch
    {
        Write-Log -path $LogFilePath -message "Bulk insert failed - $_" -level Error
Write-Log -path $LogFilePath -Message "Data is $key,
                $DateChecked,
                $InstanceID,
                $($Alert.Name),
                $($Alert.Category),
                 $($Alert.DatabaseID),
                 $($Alert.DelayBetweenResponses),
                 $($Alert.EventDescriptionKeyword),
                 $($Alert.EventSource),
                 $($Alert.HasNotification),
                 $($Alert.IncludeEventDescription),
                 $($Alert.IsEnabled),
                 $($Alert.AgentJobDetailID),
                 $($Alert.LastOccurrenceDate),
                 $($Alert.LastResponseDate),
                 $($Alert.MessageID),
                 $($Alert.NotificationMessage),
                 $($Alert.OccurrenceCount),
                 $($Alert.PerformanceCondition),
                 $($Alert.Severity),
                 $($Alert.WmiEventNamespace),
                 $($Alert.WmiEventQuery),
                $Update"

    }
}

END
{
    Write-Log -path $LogFilePath -message "Alerts Finished"
    $sourceserver.ConnectionContext.Disconnect()
}