Objective-C HMRC VAT MTD: Retrieve VAT Liabilities

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Retrieve VAT liabilities

Documentation: https://developer.service.hmrc.gov.uk/api-documentation/docs/api/service/vat-api/1.0#_retrieve-vat-liabilities_get_accordion

CURL Command

curl -X GET  https://test-api.service.hmrc.gov.uk/organisations/vat/MY_HMRC_VRN/liabilities?from=2018-06-25&to=2019-02-17 \
-H 'Authorization: Bearer HMRC_ACCESS_TOKEN' \
-H 'Accept: application/vnd.hmrc.1.0+json'

Objective-C Example

#import <CkoRest.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <NSString.h>

CkoRest *rest = [[CkoRest alloc] init];
BOOL success;

//  URL: https://test-api.service.hmrc.gov.uk/organisations/vat/MY_HMRC_VRN/liabilities?from=2018-06-25&to=2019-02-17
BOOL bTls = YES;
int port = 443;
BOOL bAutoReconnect = YES;
success = [rest Connect: @"test-api.service.hmrc.gov.uk" port: [NSNumber numberWithInt: port] tls: bTls autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@%d",@"ConnectFailReason: ",[rest.ConnectFailReason intValue]);
    NSLog(@"%@",rest.LastErrorText);
    return;
}

[rest AddHeader: @"Authorization" value: @"Bearer HMRC_ACCESS_TOKEN"];
[rest AddHeader: @"Accept" value: @"application/vnd.hmrc.1.0+json"];

CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [rest FullRequestNoBodySb: @"GET" uriPath: @"/organisations/vat/MY_HMRC_VRN/liabilities?from=2018-06-25&to=2019-02-17" sb: sbResponseBody];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

int respStatusCode = [rest.ResponseStatusCode intValue];
if (respStatusCode >= 400) {
    NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",rest.ResponseHeader);
    NSLog(@"%@",@"Response Body:");
    NSLog(@"%@",[sbResponseBody GetAsString]);
    return;
}

CkoJsonObject *jsonResponse = [[CkoJsonObject alloc] init];
[jsonResponse LoadSb: sbResponseBody];

//  See the Online Tool for Generating JSON Parse Code
int i;
int count_i;
NSString *taxPeriodFrom = 0;
NSString *taxPeriodTo = 0;
NSString *type = 0;
NSString *originalAmount = 0;
NSString *outstandingAmount = 0;
NSString *due = 0;

i = 0;
count_i = [[jsonResponse SizeOfArray: @"liabilities"] intValue];
while (i < count_i) {
    jsonResponse.I = [NSNumber numberWithInt: i];
    taxPeriodFrom = [jsonResponse StringOf: @"liabilities[i].taxPeriod.from"];
    taxPeriodTo = [jsonResponse StringOf: @"liabilities[i].taxPeriod.to"];
    type = [jsonResponse StringOf: @"liabilities[i].type"];
    originalAmount = [jsonResponse StringOf: @"liabilities[i].originalAmount"];
    outstandingAmount = [jsonResponse StringOf: @"liabilities[i].outstandingAmount"];
    due = [jsonResponse StringOf: @"liabilities[i].due"];
    i = i + 1;
}

Sample JSON Response Body

{
  "liabilities": [
    {
      "taxPeriod": {
        "from": "2018-04-06",
        "to": "2018-07-06"
      },
      "type": "VAT ...",
      "originalAmount": 6000.3,
      "outstandingAmount": 100.51,
      "due": "2018-07-06"
    }
  ]
}