Functions/Get-vROpsResources.ps1

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Function Get-vROpsResources{
    <#
        .Synopsis
            Collects resources from vROps via REST API.
 
        .DESCRIPTION
            Collects resources from a vROps Operations Manager server via REST API.
 
        .PARAMETER OMServer
            FQDN or IP address of Operations Manager server to connect to.
 
        .PARAMETER ResourceKind
            This is the Resource Kind to be looking for.
 
        .PARAMETER AuthToken
            Authorisation Token that has been generated previously, either via Connect-vROpsRASession or another method.
 
        .PARAMETER AuthResource
            Authorisation Resource object that has been generated previously, either via Connect-vROpsRASession or another method.
 
        .EXAMPLE
            $AuthToken = (Connect-vROpsRASession -OMServer vROpsOMServer.CentralIndustrial.eu -Credentials $OMCreds).Token
            Get-vROpsResources -OMServer vROpsOMServer.CentralIndustrial.eu -AuthToken $AuthToken -ResourceKind "HPE3PAR_ADAPTER"
 
        .EXAMPLE
            $AuthResource = Connect-vROpsRASession -OMServer 10.11.12.13 -Credentials $OMCreds -UseUntrustedSSLCertificates
            Get-vROpsResources -OMServer 10.11.12.13 -AuthResource $AuthResource -ResourceKind "VMWARE"
 
        .EXAMPLE
            $OMserver = '10.11.12.13'
            $AuthToken = Connect-vROpsRASession -OMServer $OMserver -Credentials $OMCreds -AuthSource "CentralIndustrial"
            Get-vROpsResources -OMServer $OMserver -AuthToken $AuthToken.Token -ResourceKind "VMWARE"
 
        .OUTPUTS
            This will output a list of resources of the kind specified.
 
        .Notes
            .NOTES
            Version: 0.1
            Author: Lars Panzerbjørn
            Creation Date: 2019.11.22
            Purpose/Change: Initial script development
 
    #>

    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory,ParameterSetName="Token")]
        [Parameter(Mandatory,ParameterSetName="Object")]
        [ValidateNotNullOrEmpty()]
        [string]$OMServer,

        [Parameter(ParameterSetName="Token")]
        [Parameter(ParameterSetName="Object")]
        [string]$ResourceKind,

        [Parameter(Mandatory,ParameterSetName="Token")]
        [ValidateNotNullOrEmpty()]
        [PSObject]$AuthToken,

        [Parameter(Mandatory,ParameterSetName="Object")]
        [ValidateNotNullOrEmpty()]
        [PSObject]$AuthResource,

        [Parameter(ParameterSetName="Token")]
        [Parameter(ParameterSetName="Object")]
        [ValidateSet('JSON', 'XML')]
        [string]$Type="JSON"
    )

    Begin{
        Write-Verbose "Beginning"
        $BaseURL = "https://" + $OMserver + "/suite-api/api/"
        $PageSize = "5000" #Maximum is 10000
        $Page = 0
        $Resourcelist = @()
        IF ($PSCmdlet.ParameterSetName -eq "Object") {$AuthToken = $AuthResource.Token}
        $Authorization = "vRealizeOpsToken $AuthToken"
        $InvokeRestMethodSplat = @{}
        $InvokeRestMethodSplat.Method = "GET"
        IF ($Type -eq "JSON") {$RestType = 'application/json'}
        IF ($Type -eq "XML") {$RestType = "application/xml"}
        $Headers = @{Authorization=$Authorization}
        IF (!([string]::IsNullOrEmpty($RestType))){
            $Headers.Accept = $RestType
            $InvokeRestMethodSplat.ContentType = $RestType
        }
        $InvokeRestMethodSplat.Headers = $Headers
    }
    Process{
        Write-Verbose "Processing"
        IF ($Type -eq "JSON"){
            Try{
                DO{
                    Write-Verbose "Page $($Page)"
                    IF (!([string]::IsNullOrEmpty($ResourceKind))){
                        Write-Verbose "Using ResourceKind: $($ResourceKind)"
                        $ResourcesURL = $BaseURL + "adapterkinds/" + $ResourceKind + "/resources/?page=$page&pageSize=$PageSize"
                    }
                    IF ([string]::IsNullOrEmpty($ResourceKind)){
                        Write-Verbose "Getting all Resources"
                        $ResourcesURL = $BaseURL + "resources/?page=$page&pageSize=$PageSize"
                    }
                    $Resources = Invoke-RestMethod @InvokeRestMethodSplat -Uri $ResourcesURL
                    $Resourcelist += $Resources.resourceList
                    $Page++
                }
                UNTIL (($Resources.links.href | Select -first 1) -eq ($Resources.links.href | Select -last 1))
            }
            Catch [System.Net.WebException]{
                IF (($PSItem | Get-ErrorInfo).Exception -eq 'The remote server returned an error: (401) Unauthorized.'){
                    Write-Warning "Failed to login. The remote server returned an error: (401) Unauthorized."
                }
            }
            Catch{
                Write-Warning "Failed to get resources.
                    Exception: $(($PSItem | Get-ErrorInfo).Exception)
                    Reason: $(($PSItem | Get-ErrorInfo).Reason)
                    Fullname: $(($PSItem | Get-ErrorInfo).Fullname)
                "

            }
        }
        IF ($Type -eq "XML"){
            Try{
                DO{
                    Write-Verbose "Page $($Page)"
                    IF (!([string]::IsNullOrEmpty($ResourceKind))){
                        Write-Verbose "Using ResourceKind: $($ResourceKind)"
                        $ResourcesURL = $BaseURL + "adapterkinds/" + $ResourceKind + "/resources/?page=$page&pageSize=$PageSize"
                    }
                    IF ([string]::IsNullOrEmpty($ResourceKind)){
                        Write-Verbose "Getting all Resources"
                        $ResourcesURL = $BaseURL + "resources/?page=$page&pageSize=$PageSize"
                    }
                    $Resources = Invoke-RestMethod @InvokeRestMethodSplat -Uri $ResourcesURL
                    $Resourcelist += $Resources.resourceList
                    $Page++
                }
                UNTIL (($Resources.links.href | Select -first 1) -eq ($Resources.links.href | Select -last 1))
            }
            Catch [System.Net.WebException]{
                IF (($PSItem | Get-ErrorInfo).Exception -eq 'The remote server returned an error: (401) Unauthorized.'){
                    Write-Warning "Failed to login. The remote server returned an error: (401) Unauthorized."
                }
            }
            Catch{
                Write-Warning "Failed to get resources.
                    Exception: $(($PSItem | Get-ErrorInfo).Exception)
                    Reason: $(($PSItem | Get-ErrorInfo).Reason)
                    Fullname: $(($PSItem | Get-ErrorInfo).Fullname)
                "

            }
        }
    }
    End{
        Write-Verbose "Ending"
        Return $Resourcelist
    }
}