Get-ADOAgentPool.ps1

function Get-ADOAgentPool
{
    <#
    .Synopsis
        Gets Azure DevOps Agent Pools
    .Description
        Gets Agent Pools and their associated queues from Azure DevOps.
 
        Queues associate a given project with a pool.
        Pools are shared by organization.
         
        Thus providing a project will return the queues associated with the project,
        and just providing the organization will return all of the common pools.
    .Example
        Get-ADOAgentPool -Organization MyOrganization -PersonalAccessToken $pat
    .Link
        https://docs.microsoft.com/en-us/rest/api/azure/devops/distributedtask/pools/get%20agent%20pools?view=azure-devops-rest-5.1
    .Link
        https://docs.microsoft.com/en-us/rest/api/azure/devops/distributedtask/queues/get%20agent%20queues?view=azure-devops-rest-5.1
    #>

    [CmdletBinding(DefaultParameterSetName='distributedtask/pools')]
    [OutputType('StartAutomating.PSDevops.Pool')]
    param(
    # The Organization
    [Parameter(Mandatory,ValueFromPipelineByPropertyName)]
    [Alias('Org')]
    [string]
    $Organization,

    # The project name or identifier.
    [Parameter(Mandatory,ParameterSetName='distributedtask/queues',ValueFromPipelineByPropertyName)]
    [Alias('ProjectID')]
    [string]
    $Project,

    # The server. By default https://dev.azure.com/.
    # To use against TFS, provide the tfs server URL (e.g. http://tfsserver:8080/tfs).
    [Parameter(ValueFromPipelineByPropertyName)]
    [uri]
    $Server = "https://dev.azure.com/",

    # The api version. By default, 5.1.
    # If targeting TFS, this will need to change to match your server version.
    # See: https://docs.microsoft.com/en-us/azure/devops/integrate/concepts/rest-api-versioning?view=azure-devops
    [string]
    $ApiVersion = "5.1-preview",

    # A Personal Access Token
    [Alias('PAT')]
    [string]
    $PersonalAccessToken,

    # Specifies a user account that has permission to send the request. The default is the current user.
    # Type a user name, such as User01 or Domain01\User01, or enter a PSCredential object, such as one generated by the Get-Credential cmdlet.
    [pscredential]
    [Management.Automation.CredentialAttribute()]
    $Credential,

    # Indicates that the cmdlet uses the credentials of the current user to send the web request.
    [Alias('UseDefaultCredential')]
    [switch]
    $UseDefaultCredentials,

    # Specifies that the cmdlet uses a proxy server for the request, rather than connecting directly to the Internet resource. Enter the URI of a network proxy server.
    [uri]
    $Proxy,

    # Specifies a user account that has permission to use the proxy server that is specified by the Proxy parameter. The default is the current user.
    # Type a user name, such as "User01" or "Domain01\User01", or enter a PSCredential object, such as one generated by the Get-Credential cmdlet.
    # This parameter is valid only when the Proxy parameter is also used in the command. You cannot use the ProxyCredential and ProxyUseDefaultCredentials parameters in the same command.
    [pscredential]
    [Management.Automation.CredentialAttribute()]
    $ProxyCredential,

    # Indicates that the cmdlet uses the credentials of the current user to access the proxy server that is specified by the Proxy parameter.
    # This parameter is valid only when the Proxy parameter is also used in the command. You cannot use the ProxyCredential and ProxyUseDefaultCredentials parameters in the same command.
    [switch]
    $ProxyUseDefaultCredentials
    )

    begin {
        #region Copy Invoke-ADORestAPI parameters
        $invokeParams = . $getInvokeParameters $PSBoundParameters
        #endregion Copy Invoke-ADORestAPI parameters
    }

    process {
        $uri = # The URI is comprised of:
            @(
                "$server".TrimEnd('/')   # the Server (minus any trailing slashes),
                $Organization            # the Organization,
                if ($Project) {$project} # the Project (if present),
                '_apis'                  # the API Root ('_apis'),
                (. $ReplaceRouteParameter $PSCmdlet.ParameterSetName)
                                         # and any parameterized URLs in this parameter set.
            ) -as [string[]] -ne '' -join '/'
        
        $uri += '?' # The URI has a query string containing:
        $uri += @(
            if ($ApiVersion) { # the api-version
                "api-version=$apiVersion"
            }
        ) -join '&'

        # We want to decorate our return value. Handily enough, both URIs contain a distinct name in the last URL segment.
        $typename = @($psCmdlet.ParameterSetName -split '/')[-1].TrimEnd('s') # We just need to drop the 's'
        $typeNames = @(
            "$organization.$typename"
            if ($Project) { "$organization.$Project.$typename" }
            "StartAutomating.PSDevOps.$typename"
        ) 

        Invoke-ADORestAPI -Uri $uri @invokeParams -PSTypeName $typenames
    }
}