(Delphi ActiveX) Xero Get Invoices

Get Xero company invoices.

For more information, see https://developer.xero.com/documentation/api/invoices

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
jsonToken: TChilkatJsonObject;
success: Integer;
resp: IChilkatHttpResponse;
jsonResponse: TChilkatJsonObject;
Type: WideString;
InvoiceID: WideString;
InvoiceNumber: WideString;
Reference: WideString;
AmountDue: WideString;
AmountPaid: WideString;
AmountCredited: WideString;
IsDiscounted: Integer;
HasAttachments: Integer;
HasErrors: Integer;
ContactContactID: WideString;
ContactName: WideString;
ContactHasValidationErrors: Integer;
DateString: WideString;
Date: WideString;
DueDateString: WideString;
DueDate: WideString;
LineAmountTypes: WideString;
SubTotal: WideString;
TotalTax: WideString;
Total: WideString;
UpdatedDateUTC: WideString;
CurrencyCode: WideString;
FullyPaidOnDate: WideString;
CurrencyRate: WideString;
j: Integer;
count_j: Integer;
PaymentID: WideString;
Amount: WideString;
HasAccount: Integer;
HasValidationErrors: Integer;
CreditNoteID: WideString;
CreditNoteNumber: WideString;
ID: WideString;
AppliedAmount: WideString;
k: Integer;
count_k: Integer;
Id: WideString;
Status: WideString;
ProviderName: WideString;
DateTimeUTC: WideString;
i: Integer;
count_i: Integer;

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

http := TChilkatHttp.Create(Self);

jsonToken := TChilkatJsonObject.Create(Self);
success := jsonToken.LoadFile('qa_data/tokens/xero-access-token.json');
if (success = 0) then
  begin
    Memo1.Lines.Add(jsonToken.LastErrorText);
    Exit;
  end;

http.AuthToken := jsonToken.StringOf('access_token');

// Replace the value here with an actual tenant ID obtained from this example:
// Get Xero Tenant IDs
http.SetRequestHeader('Xero-tenant-id','83299b9e-5747-4a14-a18a-a6c94f824eb7');

http.Accept := 'application/json';

resp := http.QuickRequest('GET','https://api.xero.com/api.xro/2.0/Invoices');
if (http.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Response Status Code: ' + IntToStr(resp.StatusCode));

jsonResponse := TChilkatJsonObject.Create(Self);
jsonResponse.Load(resp.BodyStr);
jsonResponse.EmitCompact := 0;
Memo1.Lines.Add(jsonResponse.Emit());

if (resp.StatusCode <> 200) then
  begin
    Memo1.Lines.Add('Failed.');

    Exit;
  end;

// Sample output...
// (See the parsing code below..)
// 
// Use the this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "Id": "bda1f62f-0d63-4178-8d54-e91fd226987a",
//   "Status": "OK",
//   "ProviderName": "Chilkat2222",
//   "DateTimeUTC": "\/Date(1587210234493)\/",
//   "Invoices": [
//     {
//       "Type": "ACCPAY",
//       "InvoiceID": "0032f627-3156-4d30-9b1c-4d3b994dc921",
//       "InvoiceNumber": "9871",
//       "Reference": "",
//       "Payments": [
//         {
//           "PaymentID": "22974891-3689-4694-9ee7-fd2ba917af55",
//           "Date": "\/Date(1579737600000+0000)\/",
//           "Amount": 148.50,
//           "Reference": "Chq 409",
//           "HasAccount": false,
//           "HasValidationErrors": false
//         }
//       ],
//       "CreditNotes": [
//       ],
//       "Prepayments": [
//       ],
//       "Overpayments": [
//       ],
//       "AmountDue": 0.00,
//       "AmountPaid": 148.50,
//       "AmountCredited": 0.00,
//       "IsDiscounted": false,
//       "HasAttachments": false,
//       "HasErrors": false,
//       "Contact": {
//         "ContactID": "d6a384fb-f46f-41a3-8ac7-b7bc9e0b5efa",
//         "Name": "Melrose Parking",
//         "Addresses": [
//         ],
//         "Phones": [
//         ],
//         "ContactGroups": [
//         ],
//         "ContactPersons": [
//         ],
//         "HasValidationErrors": false
//       },
//       "DateString": "2020-01-15T00:00:00",
//       "Date": "\/Date(1579046400000+0000)\/",
//       "DueDateString": "2020-01-24T00:00:00",
//       "DueDate": "\/Date(1579824000000+0000)\/",
//       "Status": "PAID",
//       "LineAmountTypes": "Exclusive",
//       "LineItems": [
//       ],
//       "SubTotal": 135.00,
//       "TotalTax": 13.50,
//       "Total": 148.50,
//       "UpdatedDateUTC": "\/Date(1221560931500+0000)\/",
//       "CurrencyCode": "AUD",
//       "FullyPaidOnDate": "\/Date(1579737600000+0000)\/"
//     },
//     {
//       "Type": "ACCPAY",
//       "InvoiceID": "673dd7cc-beb7-4697-83d4-0c47cb400cc2",
//       "InvoiceNumber": "",
//       "Reference": "",
//       "Payments": [
//         {
//           "PaymentID": "4d06f609-5200-4364-9c8b-d4379a945252",
//           "Date": "\/Date(1580688000000+0000)\/",
//           "Amount": 974.60,
//           "Reference": "DD # 96013",
//           "HasAccount": false,
//           "HasValidationErrors": false
//         }
//       ],
//       "CreditNotes": [
//         {
//           "CreditNoteID": "7df8949c-b71f-40c0-bbcf-39f2f450f286",
//           "CreditNoteNumber": "03391",
//           "ID": "7df8949c-b71f-40c0-bbcf-39f2f450f286",
//           "HasErrors": false,
//           "AppliedAmount": 218.90,
//           "DateString": "2020-01-29T00:00:00",
//           "Date": "\/Date(1580256000000+0000)\/",
//           "LineItems": [
//           ],
//           "Total": 218.90
//         }
//       ],
//       "Prepayments": [
//       ],
//       "Overpayments": [
//       ],
//       "AmountDue": 0.00,
//       "AmountPaid": 974.60,
//       "AmountCredited": 218.90,
//       "IsDiscounted": false,
//       "HasAttachments": false,
//       "HasErrors": false,
//       "Contact": {
//         "ContactID": "d0cd2c4f-18a0-4f7c-a32a-2db00f29d298",
//         "Name": "PC Complete",
//         "Addresses": [
//         ],
//         "Phones": [
//         ],
//         "ContactGroups": [
//         ],
//         "ContactPersons": [
//         ],
//         "HasValidationErrors": false
//       },
//       "DateString": "2020-01-28T00:00:00",
//       "Date": "\/Date(1580169600000+0000)\/",
//       "DueDateString": "2020-02-04T00:00:00",
//       "DueDate": "\/Date(1580774400000+0000)\/",
//       "Status": "PAID",
//       "LineAmountTypes": "Exclusive",
//       "LineItems": [
//       ],
//       "SubTotal": 1085.00,
//       "TotalTax": 108.50,
//       "Total": 1193.50,
//       "UpdatedDateUTC": "\/Date(1221561913790+0000)\/",
//       "CurrencyCode": "AUD",
//       "FullyPaidOnDate": "\/Date(1580688000000+0000)\/"
//     },
//     {
//       "Type": "ACCPAY",
//       "InvoiceID": "c12aff7e-12bf-4185-8702-460929f19674",
//       "InvoiceNumber": "",
//       "Reference": "",
//       "Payments": [
//       ],
//       "CreditNotes": [
//       ],
//       "Prepayments": [
//       ],
//       "Overpayments": [
//       ],
//       "AmountDue": 2166.99,
//       "AmountPaid": 0.00,
//       "AmountCredited": 0.00,
//       "CurrencyRate": 1.000000,
//       "IsDiscounted": false,
//       "HasAttachments": false,
//       "HasErrors": false,
//       "Contact": {
//         "ContactID": "d0cd2c4f-18a0-4f7c-a32a-2db00f29d298",
//         "Name": "PC Complete",
//         "Addresses": [
//         ],
//         "Phones": [
//         ],
//         "ContactGroups": [
//         ],
//         "ContactPersons": [
//         ],
//         "HasValidationErrors": false
//       },
//       "DateString": "2020-04-10T00:00:00",
//       "Date": "\/Date(1586476800000+0000)\/",
//       "DueDateString": "2020-05-05T00:00:00",
//       "DueDate": "\/Date(1588636800000+0000)\/",
//       "Status": "AUTHORISED",
//       "LineAmountTypes": "Exclusive",
//       "LineItems": [
//       ],
//       "SubTotal": 1969.99,
//       "TotalTax": 197.00,
//       "Total": 2166.99,
//       "UpdatedDateUTC": "\/Date(1497965301980+0000)\/",
//       "CurrencyCode": "AUD"
//     }
//   ]
// }
// 

Id := jsonResponse.StringOf('Id');
Status := jsonResponse.StringOf('Status');
ProviderName := jsonResponse.StringOf('ProviderName');
DateTimeUTC := jsonResponse.StringOf('DateTimeUTC');
i := 0;
count_i := jsonResponse.SizeOfArray('Invoices');
while i < count_i do
  begin
    jsonResponse.I := i;
    Type := jsonResponse.StringOf('Invoices[i].Type');
    InvoiceID := jsonResponse.StringOf('Invoices[i].InvoiceID');
    InvoiceNumber := jsonResponse.StringOf('Invoices[i].InvoiceNumber');
    Reference := jsonResponse.StringOf('Invoices[i].Reference');
    AmountDue := jsonResponse.StringOf('Invoices[i].AmountDue');
    AmountPaid := jsonResponse.StringOf('Invoices[i].AmountPaid');
    AmountCredited := jsonResponse.StringOf('Invoices[i].AmountCredited');
    IsDiscounted := jsonResponse.BoolOf('Invoices[i].IsDiscounted');
    HasAttachments := jsonResponse.BoolOf('Invoices[i].HasAttachments');
    HasErrors := jsonResponse.BoolOf('Invoices[i].HasErrors');
    ContactContactID := jsonResponse.StringOf('Invoices[i].Contact.ContactID');
    ContactName := jsonResponse.StringOf('Invoices[i].Contact.Name');
    ContactHasValidationErrors := jsonResponse.BoolOf('Invoices[i].Contact.HasValidationErrors');
    DateString := jsonResponse.StringOf('Invoices[i].DateString');
    Date := jsonResponse.StringOf('Invoices[i].Date');
    DueDateString := jsonResponse.StringOf('Invoices[i].DueDateString');
    DueDate := jsonResponse.StringOf('Invoices[i].DueDate');
    Status := jsonResponse.StringOf('Invoices[i].Status');
    LineAmountTypes := jsonResponse.StringOf('Invoices[i].LineAmountTypes');
    SubTotal := jsonResponse.StringOf('Invoices[i].SubTotal');
    TotalTax := jsonResponse.StringOf('Invoices[i].TotalTax');
    Total := jsonResponse.StringOf('Invoices[i].Total');
    UpdatedDateUTC := jsonResponse.StringOf('Invoices[i].UpdatedDateUTC');
    CurrencyCode := jsonResponse.StringOf('Invoices[i].CurrencyCode');
    FullyPaidOnDate := jsonResponse.StringOf('Invoices[i].FullyPaidOnDate');
    CurrencyRate := jsonResponse.StringOf('Invoices[i].CurrencyRate');
    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].Payments');
    while j < count_j do
      begin
        jsonResponse.J := j;
        PaymentID := jsonResponse.StringOf('Invoices[i].Payments[j].PaymentID');
        Date := jsonResponse.StringOf('Invoices[i].Payments[j].Date');
        Amount := jsonResponse.StringOf('Invoices[i].Payments[j].Amount');
        Reference := jsonResponse.StringOf('Invoices[i].Payments[j].Reference');
        HasAccount := jsonResponse.BoolOf('Invoices[i].Payments[j].HasAccount');
        HasValidationErrors := jsonResponse.BoolOf('Invoices[i].Payments[j].HasValidationErrors');
        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].CreditNotes');
    while j < count_j do
      begin
        jsonResponse.J := j;
        CreditNoteID := jsonResponse.StringOf('Invoices[i].CreditNotes[j].CreditNoteID');
        CreditNoteNumber := jsonResponse.StringOf('Invoices[i].CreditNotes[j].CreditNoteNumber');
        ID := jsonResponse.StringOf('Invoices[i].CreditNotes[j].ID');
        HasErrors := jsonResponse.BoolOf('Invoices[i].CreditNotes[j].HasErrors');
        AppliedAmount := jsonResponse.StringOf('Invoices[i].CreditNotes[j].AppliedAmount');
        DateString := jsonResponse.StringOf('Invoices[i].CreditNotes[j].DateString');
        Date := jsonResponse.StringOf('Invoices[i].CreditNotes[j].Date');
        Total := jsonResponse.StringOf('Invoices[i].CreditNotes[j].Total');
        k := 0;
        count_k := jsonResponse.SizeOfArray('Invoices[i].CreditNotes[j].LineItems');
        while k < count_k do
          begin
            jsonResponse.K := k;
            k := k + 1;
          end;

        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].Prepayments');
    while j < count_j do
      begin
        jsonResponse.J := j;
        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].Overpayments');
    while j < count_j do
      begin
        jsonResponse.J := j;
        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].Contact.Addresses');
    while j < count_j do
      begin
        jsonResponse.J := j;
        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].Contact.Phones');
    while j < count_j do
      begin
        jsonResponse.J := j;
        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].Contact.ContactGroups');
    while j < count_j do
      begin
        jsonResponse.J := j;
        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].Contact.ContactPersons');
    while j < count_j do
      begin
        jsonResponse.J := j;
        j := j + 1;
      end;

    j := 0;
    count_j := jsonResponse.SizeOfArray('Invoices[i].LineItems');
    while j < count_j do
      begin
        jsonResponse.J := j;
        j := j + 1;
      end;

    i := i + 1;
  end;
end;