QlikSaas-Download-OpenAPI.ps1

[CmdletBinding()]
param
(
    [Parameter()]
    [System.IO.DirectoryInfo]$SourceSchemas,
    [Switch]$Testing
)

if (-not $SourceSchemas.Exists)
{
    $SourceSchemas.Create()
}

[System.IO.FileInfo]$LastRun = "$($SourceSchemas.Parent.FullName)\$($SourceSchemas.Name)_LastRun.json"

$BaseURI = 'https://qlik.dev/specs/rest'
$PageData = Invoke-RestMethod 'https://qlik.dev/page-data/apis/page-data.json'

$APIClasses = $PageData.result.pageContext.specs.psobject.Properties.name
$RestAPIs = [System.Collections.Generic.List[PSCustomObject]]::new()
$GenerateAPIs = [System.Collections.Generic.List[string]]::new()
$OpenAPIFiles = [System.Collections.Generic.List[System.IO.FileInfo]]::new()
$OpenAPIFilesFullList = [System.Collections.Generic.List[System.IO.FileInfo]]::new()

foreach ($APIClass in $APIClasses)
{
    $PageData.result.pageContext.specs.$($APIClass).endpoints | Where-Object { $_.type -eq 'Rest' } | ForEach-Object { $RestAPIs.Add($_) }
}
[System.Collections.Generic.List[pscustomobject]]$APIVersion = $RestAPIs.parent | Select-Object -Unique -Property relativePath, id
$Configuration = @{
    RestAPIVersion = $APIVersion
}
$APIVersion.relativePath | ForEach-Object { $OpenAPIFilesFullList.add("$($SourceSchemas.FullName)\$($_)") }

if ($LastRun.Exists)
{
    $LastRunInfo = Get-Content $LastRun | ConvertFrom-Json
    foreach ($api in $Configuration.RestAPIVersion)
    {
        if (-not ($LastRunInfo.RestAPIVersion.Where({ $_.relativePath -eq $api.relativePath }).id -eq $API.id))
        {
            $GenerateAPIs.Add($API.relativePath)
        }
    }
}
else
{
    $GenerateAPIs.addRange([string[]]$Configuration.RestAPIVersion.relativePath)
}

if ($GenerateAPIs.Count -eq 0 -and $Testing)
{
    $selectedAPIs = [string[]]$Configuration.RestAPIVersion.relativePath | Sort-Object | Out-GridView -Title 'Select API' -OutputMode Multiple
    $selectedAPIs | ForEach-Object { $GenerateAPIs.Add($_) }
}

foreach ($RestAPIName in $GenerateAPIs)
{
    $RestAPI = "$($BaseURI)/$($RestAPIName)"
    [System.IO.FileInfo]$OpenAPIFile = "$($SourceSchemas.FullName)\$($RestAPIName)"
    $OpenAPIFiles.Add($OpenAPIFile)
   
    Invoke-RestMethod -Method Get -Uri $RestAPI -OutFile $OpenAPIFile
}