Azure Retail Pricing API Proof of Concept

Get-AzRetailPrice.ps1

function Get-AzSpotPrice {
    [CmdletBinding()]
    param (
        #VM SKU (e.g. Standard_F8s)
        [String]$Sku,
        #Azure Region (e.g. brazilsouth)
        [String]$Region,
        #ODATA filter to use on the data
        [String]$Filter,
        #Maximum number of records to retrieve, or specify 'Unlimited' for all records. Defaults to 100. This behaves like the Exchange Cmdlets
        [String]$ResultSize,
        #Path to the prices API. You usually do not need to specify this.
        [UriBuilder]$Uri = 'https://prices.azure.com/api/retail/prices'
    )
    
    $SpotFilter = @("contains(skuName,'Spot')")
    if ($Filter) {
        $SpotFilter += $Filter
    }
    if ($Region) {
        $SpotFilter += $Region.foreach{
            "armRegionName eq '$PSItem'"
        }
    }

    if ($Sku) {
        $SpotFilter += $Sku.foreach{
            "armSkuName eq '$PSItem'"
        }
    }

    $queryFilter = $SpotFilter -join ' and '
    
    $AzRetailPriceParams = @{
        Filter = $QueryFilter
    }
    if ($ResultSize) {$AzRetailPriceParams.ResultSize = $ResultSize}
    Get-AzRetailPrice @AzRetailPriceParams
}


function Get-AzRetailPrice {
    [CmdletBinding()]
    param(
        #ODATA filter to use on the data
        [String]$Filter,
        #Maximum number of records to retrieve, or specify 'Unlimited' for all records. Defaults to 100. This behaves like the Exchange Cmdlets
        [String]$ResultSize,
        #Path to the prices API. You usually do not need to specify this.
        [UriBuilder]$Uri = 'https://prices.azure.com/api/retail/prices'
    )

    #The query builder object has to be initialized indirectly
    $query = [Web.HTTPUtility]::ParseQueryString('')
    if ($Filter) {
        $query.add('$filter',$Filter)
    }

    if ($ResultSize -ne '' -and $ResultSize -ne 'Unlimited') {
            $query.add('$top',$ResultSize)
    }
    #TODO: Add case insensitivity to the query
    $result = $null
    do {
        if ($result.NextPageLink) {
            if ($ResultSize -ne '') {
                Write-Warning "Only returning the first 100 prices by default for safety. Adjust the -ResultSetSize parameter if you wish to retrieve more."
                return
            }
            $Uri = [uribuilder]$result.NextPageLink
        } else {
            $Uri.Query = $query.ToString()
        }
        $result = Invoke-RestMethod -Uri $Uri.uri
        $result.Items
    } until (
        $result.count -lt 100 -or 
        #TODO: This is a quirk for if you specify exactly 100 records, maybe should track this clientside instead
        $result.NextPageLink -notmatch 'skip=\d+$'
    )
}