(Objective-C) PayPal - Execute Approved PayPal Payment

Executes an approved PayPal payment. (This is for executing an approved PayPal payment, not a credit card payment.)

Note: This example requires Chilkat v9.5.0.65 or greater.

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

// Note: Requires Chilkat v9.5.0.65 or greater..

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

// Load our previously obtained access token. (see PayPal OAuth2 Access Token)
CkoJsonObject *jsonToken = [[CkoJsonObject alloc] init];
[jsonToken LoadFile: @"qa_data/tokens/paypal.json"];

// Build the Authorization request header field value.
CkoStringBuilder *sbAuth = [[CkoStringBuilder alloc] init];
// token_type should be "Bearer"
[sbAuth Append: [jsonToken StringOf: @"token_type"]];
[sbAuth Append: @" "];
[sbAuth Append: [jsonToken StringOf: @"access_token"]];

// Make the initial connection.
// A single REST object, once connected, can be used for many PayPal REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
CkoRest *rest = [[CkoRest alloc] init];
BOOL bAutoReconnect = YES;
BOOL success = [rest Connect: @"api.sandbox.paypal.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// Build the JSON containing the payer_id
CkoJsonObject *json = [[CkoJsonObject alloc] init];
json.EmitCompact = NO;
[json AppendString: @"payer_id" value: @"RRCYJUTFJGZTA"];
NSLog(@"%@",[json Emit]);

// The JSON created by the above code:

// 	{ 
// 	  "payer_id": "RRCYJUTFJGZTA"
// 	}

[rest AddHeader: @"Authorization" value: [sbAuth GetAsString]];
[rest AddHeader: @"Content-Type" value: @"application/json"];

// The payment ID is passed in the path.
CkoStringBuilder *sbPath = [[CkoStringBuilder alloc] init];
[sbPath Append: @"/v1/payments/payment/payment_id/execute"];
int numReplaced = [[sbPath Replace: @"payment_id" replacement: @"PAY-4N746561P0587231SKQQK6MY"] intValue];

// Send the POST request containign the JSON in the request body, and get the JSON response.
CkoStringBuilder *sbJsonRequest = [[CkoStringBuilder alloc] init];
json.EmitCompact = YES;
[json EmitSb: sbJsonRequest];
CkoStringBuilder *sbJsonResponse = [[CkoStringBuilder alloc] init];
success = [rest FullRequestSb: @"POST" uriPath: [sbPath GetAsString] requestBody: sbJsonRequest responseBody: sbJsonResponse];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

json.EmitCompact = NO;
[json LoadSb: sbJsonResponse];

NSLog(@"%@%d",@"Response Status Code = ",[rest.ResponseStatusCode intValue]);

// Did we get a 200 success response?
if ([rest.ResponseStatusCode intValue] != 200) {
    NSLog(@"%@",[json Emit]);
    NSLog(@"%@",@"Failed.");
    return;
}

// Sample JSON response is shown below.
NSLog(@"%@",[json Emit]);

NSLog(@"%@",@"success");

// ------------------------------------------------
// A sample JSON response:

// 	{ 
// 	  "id": "PAY-4N746561P0587231SKQQK6MY",
// 	  "create_time": "2014-09-22T23:22:27Z",
// 	  "update_time": "2014-09-22T23:31:13Z",
// 	  "state": "approved",
// 	  "intent": "sale",
// 	  "payer": { 
// 	    "payment_method": "paypal",
// 	    "payer_info": { 
// 	      "email": "npurayil-uspr-60@paypal.com",
// 	      "first_name": "Brian",
// 	      "last_name": "Robinson",
// 	      "payer_id": "JMKDKJ4D7DG7G",
// 	      "shipping_address": { 
// 	        "line1": "4thFloor",
// 	        "line2": "unit#34",
// 	        "city": "SAn Jose",
// 	        "state": "CA",
// 	        "postal_code": "95131",
// 	        "country_code": "US",
// 	        "phone": "011862212345678",
// 	        "recipient_name": "HelloWorld"
// 	      }
// 	    }
// 	  },
// 	  "transactions": [
// 	    { 
// 	      "amount": { 
// 	        "total": "30.11",
// 	        "currency": "USD",
// 	        "details": { 
// 	          "subtotal": "30.00",
// 	          "tax": "0.07",
// 	          "shipping": "0.03",
// 	          "handling_fee": "1.00",
// 	          "insurance": "0.01",
// 	          "shipping_discount": "-1.00"
// 	        }
// 	      },
// 	      "description": "This is the payment transaction description.",
// 	      "item_list": { 
// 	        "items": [
// 	          { 
// 	            "name": "hat",
// 	            "sku": "1",
// 	            "price": "3.00",
// 	            "currency": "USD",
// 	            "quantity": "5",
// 	            "description": "Brown color hat",
// 	            "tax": "0.01"
// 	          },
// 	          { 
// 	            "name": "handbag",
// 	            "sku": "product34",
// 	            "price": "15.00",
// 	            "currency": "USD",
// 	            "quantity": "1",
// 	            "description": "Black color handbag",
// 	            "tax": "0.02"
// 	          }
// 	        ],
// 	        "shipping_address": { 
// 	          "recipient_name": "HelloWorld",
// 	          "line1": "4thFloor",
// 	          "line2": "unit#34",
// 	          "city": "SAn Jose",
// 	          "state": "CA",
// 	          "phone": "011862212345678",
// 	          "postal_code": "95131",
// 	          "country_code": "US"
// 	        }
// 	      },
// 	      "related_resources": [
// 	        { 
// 	          "sale": { 
// 	            "id": "4XP56210M0797192Y",
// 	            "create_time": "2014-09-22T23:22:27Z",
// 	            "update_time": "2014-09-22T23:31:13Z",
// 	            "amount": { 
// 	              "total": "30.11",
// 	              "currency": "USD"
// 	            },
// 	            "payment_mode": "INSTANT_TRANSFER",
// 	            "state": "completed",
// 	            "protection_eligibility": "ELIGIBLE",
// 	            "protection_eligibility_type": "ITEM_NOT_RECEIVED_ELIGIBLE",
// 	            "transaction_fee": { 
// 	              "value": "1.75",
// 	              "currency": "USD"
// 	            },
// 	            "parent_payment": "PAY-4N746561P0587231SKQQK6MY",
// 	            "links": [
// 	              { 
// 	                "href": "https://api.paypal.com/v1/payments/sale/4XP56210M0797192Y",
// 	                "rel": "self",
// 	                "method": "GET"
// 	              },
// 	              { 
// 	                "href": "https://api.paypal.com/v1/payments/sale/4XP56210M0797192Y/refund",
// 	                "rel": "refund",
// 	                "method": "POST"
// 	              },
// 	              { 
// 	                "href": "https://api.paypal.com/v1/payments/payment/PAY-4N746561P0587231SKQQK6MY",
// 	                "rel": "parent_payment",
// 	                "method": "GET"
// 	              }
// 	            ]
// 	          }
// 	        }
// 	      ]
// 	    }
// 	  ],
// 	  "links": [
// 	    { 
// 	      "href": "https://api.paypal.com/v1/payments/payment/PAY-4N746561P0587231SKQQK6MY",
// 	      "rel": "self",
// 	      "method": "GET"
// 	    }
// 	  ]
// 	}