(Objective-C) Retrieve the metadata for a DriveItem

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Fetches the JSON metadata for a DriveItem.

For more information, see https://docs.microsoft.com/en-us/onedrive/developer/rest-api/api/driveitem_get?view=odsp-graph-online

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

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

// Use your client ID, client secret, and tenant ID in the following lines
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"client_id" value: @"2871da2c-8176-4b7f-869b-2311aa82e743"];
[json UpdateString: @"client_secret" value: @"2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH"];
[json UpdateString: @"scope" value: @"https://graph.microsoft.com/.default"];
[json UpdateString: @"token_endpoint" value: @"https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token"];

CkoHttp *http = [[CkoHttp alloc] init];
http.AuthToken = [json Emit];

// Sends the following GET request:
// GET https://graph.microsoft.com/v1.0/users/{user-id}/drive/root:/{item-path}

// Make sure to automatically follow redirects
http.FollowRedirects = YES;

// This example will get the metadata for /Misc/wildlife/penguins.jpg
[http SetUrlVar: @"item_path" value: @"Misc//penguins.jpg"];
[http SetUrlVar: @"user_id" value: @"4fe732c3-322e-4a6b-b729-2fd1eb5c6104"];

NSString *metaData = [http QuickGetStr: @"https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{$item_path}"];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

json.EmitCompact = NO;
BOOL success = [json Load: metaData];
NSLog(@"%@",[json Emit]);

// Sample JSON metadata result:

// {
//   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('admin%40chilkat.io')/drive/root/$entity",
//   "@microsoft.graph.downloadUrl": "https://public.dm.files.1drv.com/y4mh0z_Og97O7Q...o2q1HhNBU",
//   "createdDateTime": "2017-06-04T20:40:22.48Z",
//   "cTag": "aYzozQTMzRkNFQjlCNzRDQzE1ITQ4NzIuMjU3",
//   "eTag": "aM0EzM0ZDRUI5Qjc0Q0MxNSE0ODcyLjY",
//   "id": "3A33FCEB9B74CC15!4872",
//   "lastModifiedDateTime": "2018-10-20T18:22:29.977Z",
//   "name": "penguins.jpg",
//   "size": 777835,
//   "webUrl": "https://1drv.ms/i/s!ABXMdJvr_DM6pgg",
//   "rating": {
//     "rating": 75,
//     "simpleRating": 4
//   },
//   "createdBy": {
//     "user": {
//       "displayName": "Joe Programmer",
//       "id": "3a33fceb9b74cc15"
//     }
//   },
//   "lastModifiedBy": {
//     "user": {
//       "displayName": "Joe Programmer",
//       "id": "3a33fceb9b74cc15"
//     }
//   },
//   "parentReference": {
//     "driveId": "3a33fceb9b74cc15",
//     "driveType": "personal",
//     "id": "3A33FCEB9B74CC15!4871",
//     "name": "wildlife",
//     "path": "/drive/root:/Misc/wildlife"
//   },
//   "file": {
//     "mimeType": "image/jpeg",
//     "hashes": {
//       "sha1Hash": "DF7BE9DC4F467187783ACA68C7CE98E4DF2172D0"
//     }
//   },
//   "fileSystemInfo": {
//     "createdDateTime": "2017-06-04T20:40:22.48Z",
//     "lastModifiedDateTime": "2009-07-14T05:32:31.674Z"
//   },
//   "image": {
//     "height": 768,
//     "width": 1024
//   },
//   "photo": {
//     "takenDateTime": "2008-02-18T05:07:31Z"
//   },
//   "shared": {
//     "scope": "users",
//     "owner": {
//       "user": {
//         "displayName": "Joe Programmer",
//         "id": "3a33fceb9b74cc15"
//       }
//     }
//   }
// }
// 

// If the response status code was not 200, then it failed.
if ([http.LastStatus intValue] != 200) {
    NSLog(@"%@%d",@"Response Status Code = ",[http.LastStatus intValue]);
    NSLog(@"%@",@"Failed.");
    return;
}

// Demonstrate how to parse the JSON...

NSString *odata_context = [json StringOf: @"\"@odata.context\""];
NSString *microsoft_graph_downloadUrl = [json StringOf: @"\"@microsoft.graph.downloadUrl\""];
NSString *createdDateTime = [json StringOf: @"createdDateTime"];
NSString *cTag = [json StringOf: @"cTag"];
NSString *eTag = [json StringOf: @"eTag"];
NSString *id = [json StringOf: @"id"];
NSString *lastModifiedDateTime = [json StringOf: @"lastModifiedDateTime"];
NSString *name = [json StringOf: @"name"];
int size = [[json IntOf: @"size"] intValue];
NSString *webUrl = [json StringOf: @"webUrl"];
int ratingRating = [[json IntOf: @"rating.rating"] intValue];
int ratingSimpleRating = [[json IntOf: @"rating.simpleRating"] intValue];
NSString *createdByUserDisplayName = [json StringOf: @"createdBy.user.displayName"];
NSString *createdByUserId = [json StringOf: @"createdBy.user.id"];
NSString *lastModifiedByUserDisplayName = [json StringOf: @"lastModifiedBy.user.displayName"];
NSString *lastModifiedByUserId = [json StringOf: @"lastModifiedBy.user.id"];
NSString *parentReferenceDriveId = [json StringOf: @"parentReference.driveId"];
NSString *parentReferenceDriveType = [json StringOf: @"parentReference.driveType"];
NSString *parentReferenceId = [json StringOf: @"parentReference.id"];
NSString *parentReferenceName = [json StringOf: @"parentReference.name"];
NSString *parentReferencePath = [json StringOf: @"parentReference.path"];
NSString *fileMimeType = [json StringOf: @"file.mimeType"];
NSString *fileHashesSha1Hash = [json StringOf: @"file.hashes.sha1Hash"];
NSString *fileSystemInfoCreatedDateTime = [json StringOf: @"fileSystemInfo.createdDateTime"];
NSString *fileSystemInfoLastModifiedDateTime = [json StringOf: @"fileSystemInfo.lastModifiedDateTime"];
int imageHeight = [[json IntOf: @"image.height"] intValue];
int imageWidth = [[json IntOf: @"image.width"] intValue];
NSString *photoTakenDateTime = [json StringOf: @"photo.takenDateTime"];
NSString *sharedScope = [json StringOf: @"shared.scope"];
NSString *sharedOwnerUserDisplayName = [json StringOf: @"shared.owner.user.displayName"];
NSString *sharedOwnerUserId = [json StringOf: @"shared.owner.user.id"];