(Objective-C) Iterate Pages in Feed

Demonstrates how to read the next page in the user's Facebook feed, and iterates through all of the pages in the Facebook feed.

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#import <CkoOAuth2.h>
#import <CkoRest.h>
#import <NSString.h>
#import <CkoJsonObject.h>
#import <CkoUrl.h>

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

// This example assumes a previously obtained an access token
CkoOAuth2 *oauth2 = [[CkoOAuth2 alloc] init];
oauth2.AccessToken = @"FACEBOOK-ACCESS-TOKEN";

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

// Connect to Facebook and send the following GET request:
BOOL success = [rest Connect: @"graph.facebook.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// Provide the authentication credentials (i.e. the access key)
[rest SetAuthOAuth2: oauth2];

// Gets the 1st page in the user's feed.
NSString *responseJson = [rest FullRequestNoBody: @"GET" uriPath: @"/v2.7/me/feed"];
if (rest.LastMethodSuccess != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

CkoJsonObject *json = [[CkoJsonObject alloc] init];
json.EmitCompact = NO;
[json Load: responseJson];

// 
// See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.
// 

CkoUrl *nextUrl = [[CkoUrl alloc] init];

// Get the URL for the next page in the feed.
NSString *nextUrlStr = [json StringOf: @"paging.next"];
while (json.LastMethodSuccess == YES) {

    NSLog(@"%@%@",@"Next page URL: ",nextUrlStr);

    [nextUrl ParseUrl: nextUrlStr];

    // Prepare for getting the next page in the feed.
    // We can continue using the same REST object.
    // If already connected, we'll continue using the existing connection.
    // Otherwise, a new connection will automatically be made if needed.
    [rest ClearAllQueryParams];
    [rest AddQueryParams: nextUrl.Query];

    responseJson = [rest FullRequestNoBody: @"GET" uriPath: @"/v2.7/me/feed"];
    if (rest.LastMethodSuccess != YES) {
        NSLog(@"%@",rest.LastErrorText);
        return;
    }

    [json Load: responseJson];
    // See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    // Get the URL for the next page.
    nextUrlStr = [json StringOf: @"paging.next"];
}

NSLog(@"%@",@"No more pages in the feed.");