functions/Add-WUGPerformanceMonitorToDevice.ps1

<#
.SYNOPSIS
    Assigns a performance monitor to one or more devices in WhatsUp Gold.
 
.DESCRIPTION
    Add-WUGPerformanceMonitorToDevice assigns a specified performance monitor template to one or
    more devices via the WhatsUp Gold REST API (POST /api/v1/devices/{deviceId}/monitors/-).
    When multiple DeviceIds or MonitorIds are supplied, the function loops through each
    combination, issuing one POST per pair. An optional parameter controls the polling interval.
 
.PARAMETER DeviceId
    One or more device IDs to assign the monitor to. Required. Accepts pipeline input.
 
.PARAMETER MonitorId
    One or more performance monitor template IDs (monitorTypeId) to assign. Required.
 
.PARAMETER Enabled
    Whether the monitor should be enabled. Valid values: true, false. Default: true.
 
.PARAMETER PollingIntervalMinutes
    The polling interval in minutes for the performance monitor. Default: 5.
 
.EXAMPLE
    Add-WUGPerformanceMonitorToDevice -DeviceId 42 -MonitorId 5
 
    Assigns performance monitor template 5 to device 42 with default settings.
 
.EXAMPLE
    Add-WUGPerformanceMonitorToDevice -DeviceId 42 -MonitorId 5 -PollingIntervalMinutes 10
 
    Assigns performance monitor 5 to device 42 with a 10-minute polling interval.
 
.EXAMPLE
    Add-WUGPerformanceMonitorToDevice -DeviceId @(100,101,102) -MonitorId 12
 
    Assigns performance monitor 12 to devices 100, 101, and 102.
 
.EXAMPLE
    Add-WUGPerformanceMonitorToDevice -DeviceId 42 -MonitorId @(5,6,7)
 
    Assigns performance monitors 5, 6, and 7 to device 42.
 
.EXAMPLE
    Add-WUGPerformanceMonitorToDevice -DeviceId @(100,101) -MonitorId @(5,6) -Enabled false
 
    Assigns monitors 5 and 6 to devices 100 and 101 (4 total assignments) in a disabled state.
 
.EXAMPLE
    @(100,101,102) | Add-WUGPerformanceMonitorToDevice -MonitorId 5
 
    Pipes three device IDs and assigns performance monitor 5 to each.
 
.NOTES
    Author: Jason Alberino (jason@wug.ninja)
    Reference: https://docs.ipswitch.com/NM/WhatsUpGold2024/02_Guides/rest_api/#tag/Device-Monitors
 
    The WUG REST API has no bulk endpoint for assigning a monitor to multiple devices.
    This function iterates each DeviceId x MonitorId combination, one POST per pair.
#>

function Add-WUGPerformanceMonitorToDevice {
    [CmdletBinding()]
    param(
        [Parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
        [Alias('id')]
        [int[]]$DeviceId,
        [Parameter(Position = 1, Mandatory = $true, ValueFromPipelineByPropertyName = $true)]
        [int[]]$MonitorId,
        [ValidateSet("true", "false")][string]$Enabled = "true",
        [int]$PollingIntervalMinutes = 10
    )

    begin {
        Write-Debug "Initializing Add-WUGPerformanceMonitorToDevice function."
        Write-Debug "DeviceId: $DeviceId"
        Write-Debug "MonitorId: $MonitorId"
        Write-Debug "Enabled: $Enabled"
        Write-Debug "PollingIntervalMinutes: $PollingIntervalMinutes"

        # Build the performance params sub-object once - identical for every device/monitor pair
        $performanceParams = @{
            pollingIntervalMinutes = $PollingIntervalMinutes
        }
    }

    process {
        $totalDevices = $DeviceId.Count
        $currentDeviceIndex = 0

        foreach ($dId in $DeviceId) {
            $currentDeviceIndex++

            foreach ($mId in $MonitorId) {
                $percentComplete = [Math]::Round(($currentDeviceIndex / $totalDevices) * 100)
                Write-Progress -Activity "Assigning performance monitor(s) to device(s)" -Status "Processing Device ID $dId ($currentDeviceIndex of $totalDevices)" -PercentComplete $percentComplete

                $uri  = "$($global:WhatsUpServerBaseURI)/api/v1/devices/${dId}/monitors/-"
                $body = @{
                    type          = "performance"
                    monitorTypeId = $mId
                    enabled       = $Enabled
                    isGlobal      = "true"
                    performance   = $performanceParams
                } | ConvertTo-Json -Depth 5

                Write-Debug "Assigning performance monitor $mId to device $dId"
                Write-Debug "URI: $uri"
                Write-Debug "Body: $body"

                try {
                    $result = Get-WUGAPIResponse -Uri $uri -Method "POST" -Body $body

                    if ($result.data.successful -eq 1) {
                        Write-Output "Successfully assigned performance monitor $mId to device $dId."
                        Write-Debug "Result from Get-WUGAPIResponse for Device ID ${dId}: $result"
                    }
                    else {
                        Write-Warning "Failed to assign performance monitor $mId to device $dId."
                        Write-Debug "Result from Get-WUGAPIResponse for Device ID ${dId}: $result"
                    }
                }
                catch {
                    Write-Error "Error assigning performance monitor $mId to device ${dId}: $_"
                }
            }
        }
    }

    end {
        Write-Progress -Activity "Assigning performance monitor(s) to device(s)" -Completed
        Write-Debug "Completed Add-WUGPerformanceMonitorToDevice function."
    }
}

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