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Xero List Attachments for an Item (such as an Invoice)

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Demonstrates how to get information about the attachments for a particular Xero item.

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Local $bSuccess = False

; This example requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

$oHttp = ObjCreate("Chilkat.Http")

$oJsonToken = ObjCreate("Chilkat.JsonObject")
$bSuccess = $oJsonToken.LoadFile("qa_data/tokens/xero-access-token.json")
If ($bSuccess = False) Then
    ConsoleWrite($oJsonToken.LastErrorText & @CRLF)
    Exit
EndIf

$oHttp.AuthToken = $oJsonToken.StringOf("access_token")

; Replace the value here with an actual tenant ID obtained from this example:
; Get Xero Tenant IDs
$oHttp.SetRequestHeader "Xero-tenant-id","83299b9e-5747-4a14-a18a-a6c94f824eb7"

$oHttp.Accept = "application/json"

Local $sUrl = "https://api.xero.com/api.xro/2.0/{$Endpoint}/{$Guid}/Attachments/"

; Endpoint can be Invoices, Receipts, CreditNotes, PurchaseOrders, etc.
$oHttp.SetUrlVar("Endpoint","Invoices")

; Guid is the ID of the item, such as the InvoiceID.
$oHttp.SetUrlVar("Guid","0032f627-3156-4d30-9b1c-4d3b994dc921")

$oResp = ObjCreate("Chilkat.HttpResponse")
$bSuccess = $oHttp.HttpNoBody("GET",$sUrl,$oResp)
If ($bSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Response Status Code: " & $oResp.StatusCode & @CRLF)

$oJsonResponse = ObjCreate("Chilkat.JsonObject")
$oJsonResponse.Load($oResp.BodyStr)
$oJsonResponse.EmitCompact = False
ConsoleWrite($oJsonResponse.Emit() & @CRLF)

If ($oResp.StatusCode <> 200) Then
    ConsoleWrite("Failed." & @CRLF)
    Exit
EndIf

; Sample response:
; 
; Use the this online tool to generate parsing code from sample JSON: 
; Generate Parsing Code from JSON

; {
;   "Id": "24bfbcb9-dec9-4d33-835c-8f165d776766",
;   "Status": "OK",
;   "ProviderName": "Chilkat2222",
;   "DateTimeUTC": "\/Date(1587213296972)\/",
;   "Attachments": [
;     {
;       "AttachmentID": "daf106e2-8634-4349-bfcc-86c1df0793b2",
;       "FileName": "penguins.jpg",
;       "Url": "https://api.xero.com/api.xro/2.0/Invoices/0032f627-3156-4d30-9b1c-4d3b994dc921/Attachments/penguins.jpg",
;       "MimeType": "image/jpg",
;       "ContentLength": 777835
;     }
;   ]
; }

Local $sAttachmentID
Local $sFileName
Local $sV_Url
Local $sMimeType
Local $iContentLength

Local $sId = $oJsonResponse.StringOf("Id")
Local $sStatus = $oJsonResponse.StringOf("Status")
Local $sProviderName = $oJsonResponse.StringOf("ProviderName")
Local $sDateTimeUTC = $oJsonResponse.StringOf("DateTimeUTC")
Local $i = 0
Local $iCount_i = $oJsonResponse.SizeOfArray("Attachments")
While $i < $iCount_i
    $oJsonResponse.I = $i
    $sAttachmentID = $oJsonResponse.StringOf("Attachments[i].AttachmentID")
    $sFileName = $oJsonResponse.StringOf("Attachments[i].FileName")
    $sV_Url = $oJsonResponse.StringOf("Attachments[i].Url")
    $sMimeType = $oJsonResponse.StringOf("Attachments[i].MimeType")
    $iContentLength = $oJsonResponse.IntOf("Attachments[i].ContentLength")
    $i = $i + 1
Wend