(Objective-C) Shopify Set inventory levels to a certain amount

Use the set endpoint with the location ID and inventory item ID to set an inventory level to a specific value.

For more information, see https://shopify.dev/tutorials/manage-product-inventory-with-admin-api#update-inventory-levels-for-a-product-variant

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#import <CkoHttp.h>
#import <CkoJsonObject.h>
#import <NSString.h>
#import <CkoHttpResponse.h>

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

CkoHttp *http = [[CkoHttp alloc] init];

http.Login = @"SHOPIFY_PRIVATE_API_KEY";
http.Password = @"SHOPIFY_PRIVATE_API_KEY";

// Also see: How to retrieve inventory levels

http.Accept = @"application/json";

// The following JSON is sent in the request body:

// {
//   "location_id": 6884556842,
//   "inventory_item_id": 12250274365496,
//   "available": 1
// }

// Use this online tool to generate the code from sample JSON: 
// Generate Code to Create JSON

CkoJsonObject *jsonRequestBody = [[CkoJsonObject alloc] init];
[jsonRequestBody UpdateInt: @"location_id" value: [NSNumber numberWithInt: 6884556842]];
[jsonRequestBody UpdateInt: @"inventory_item_id" value: [NSNumber numberWithInt: 12250274365496]];
[jsonRequestBody UpdateInt: @"available" value: [NSNumber numberWithInt: 1]];

NSString *url = @"https://{shop}.myshopify.com/admin/api/2020-04/inventory_levels/set.json";

CkoHttpResponse *resp = [http PText: @"POST" url: url textData: [jsonRequestBody Emit] charset: @"utf-8" contentType: @"application/json" md5: NO gzip: NO];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@%d",@"Response Status Code: ",[resp.StatusCode intValue]);

CkoJsonObject *jsonResponse = [[CkoJsonObject alloc] init];
[jsonResponse Load: resp.BodyStr];
jsonResponse.EmitCompact = NO;
NSLog(@"%@",[jsonResponse Emit]);

if ([resp.StatusCode intValue] >= 300) {
    NSLog(@"%@",@"Failed.");

    return;
}

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

// {
//   "inventory_level": {
//     "inventory_item_id": 12250274365496,
//     "location_id": 6884556842,
//     "available": 1,
//     "updated_at": "2018-06-26T15:44:33-04:00",
// ...
//     "admin_graphql_api_id": "gid://shopify/InventoryLevel/6485147690?inventory_item_id=12250274365496"
// ...
//   }
// }
// 

int inventory_levelInventory_item_id = [[jsonResponse IntOf: @"inventory_level.inventory_item_id"] intValue];
int inventory_levelLocation_id = [[jsonResponse IntOf: @"inventory_level.location_id"] intValue];
int inventory_levelAvailable = [[jsonResponse IntOf: @"inventory_level.available"] intValue];
NSString *inventory_levelUpdated_at = [jsonResponse StringOf: @"inventory_level.updated_at"];
NSString *inventory_levelAdmin_graphql_api_id = [jsonResponse StringOf: @"inventory_level.admin_graphql_api_id"];