/
FBFriendPickerViewController.m
543 lines (447 loc) · 19 KB
/
FBFriendPickerViewController.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
/*
* Copyright 2010-present Facebook.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "FBFriendPickerViewController.h"
#import "FBFriendPickerViewController+Internal.h"
#import "FBAppEvents+Internal.h"
#import "FBError.h"
#import "FBFriendPickerCacheDescriptor.h"
#import "FBFriendPickerViewDefaultPNG.h"
#import "FBGraphObjectPagingLoader.h"
#import "FBGraphObjectTableCell.h"
#import "FBGraphObjectTableDataSource.h"
#import "FBGraphObjectTableSelection.h"
#import "FBLogger.h"
#import "FBRequest.h"
#import "FBRequestConnection.h"
#import "FBSession+Internal.h"
#import "FBSettings.h"
#import "FBUtility.h"
NSString *const FBFriendPickerCacheIdentity = @"FBFriendPicker";
int const FBRefreshCacheDelaySeconds = 2;
@interface FBFriendPickerViewController () <FBGraphObjectSelectionChangedDelegate,
FBGraphObjectViewControllerDelegate,
FBGraphObjectPagingLoaderDelegate>
@property (nonatomic, retain) FBGraphObjectTableDataSource *dataSource;
@property (nonatomic, retain) FBGraphObjectTableSelection *selectionManager;
@property (nonatomic, retain) FBGraphObjectPagingLoader *loader;
@property (nonatomic) BOOL trackActiveSession;
- (void)initialize;
- (void)centerAndStartSpinner;
- (void)loadDataSkippingRoundTripIfCached:(NSNumber*)skipRoundTripIfCached;
- (FBRequest*)requestForLoadData;
- (void)addSessionObserver:(FBSession*)session;
- (void)removeSessionObserver:(FBSession*)session;
- (void)clearData;
@end
@implementation FBFriendPickerViewController {
BOOL _allowsMultipleSelection;
}
@synthesize dataSource = _dataSource;
@synthesize delegate = _delegate;
@synthesize fieldsForRequest = _fieldsForRequest;
@synthesize selectionManager = _selectionManager;
@synthesize spinner = _spinner;
@synthesize tableView = _tableView;
@synthesize userID = _userID;
@synthesize loader = _loader;
@synthesize sortOrdering = _sortOrdering;
@synthesize displayOrdering = _displayOrdering;
@synthesize trackActiveSession = _trackActiveSession;
@synthesize session = _session;
- (id)init {
self = [super init];
if (self) {
[self initialize];
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self initialize];
}
return self;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
[self initialize];
}
return self;
}
- (void)initialize {
// Data Source
FBGraphObjectTableDataSource *dataSource = [[[FBGraphObjectTableDataSource alloc]
init]
autorelease];
dataSource.defaultPicture = [FBFriendPickerViewDefaultPNG image];
dataSource.controllerDelegate = self;
dataSource.itemTitleSuffixEnabled = YES;
// Selection Manager
FBGraphObjectTableSelection *selectionManager = [[[FBGraphObjectTableSelection alloc]
initWithDataSource:dataSource]
autorelease];
selectionManager.delegate = self;
// Paging loader
id loader = [[[FBGraphObjectPagingLoader alloc] initWithDataSource:dataSource
pagingMode:FBGraphObjectPagingModeImmediate]
autorelease];
self.loader = loader;
self.loader.delegate = self;
// Self
self.allowsMultipleSelection = YES;
self.dataSource = dataSource;
self.delegate = nil;
self.itemPicturesEnabled = YES;
self.selectionManager = selectionManager;
self.userID = @"me";
self.sortOrdering = FBFriendSortByFirstName;
self.displayOrdering = FBFriendDisplayByFirstName;
self.trackActiveSession = YES;
}
- (void)dealloc {
[_loader cancel];
_loader.delegate = nil;
[_loader release];
_dataSource.controllerDelegate = nil;
[_dataSource release];
[_fieldsForRequest release];
[_selectionManager release];
[_spinner release];
[_tableView release];
[_userID release];
[self removeSessionObserver:_session];
[_session release];
[super dealloc];
}
#pragma mark - Custom Properties
- (BOOL)allowsMultipleSelection {
return _allowsMultipleSelection;
}
- (void)setAllowsMultipleSelection:(BOOL)allowsMultipleSelection {
_allowsMultipleSelection = allowsMultipleSelection;
if (self.selectionManager) {
self.selectionManager.allowsMultipleSelection = allowsMultipleSelection;
}
}
- (BOOL)itemPicturesEnabled {
return self.dataSource.itemPicturesEnabled;
}
- (void)setItemPicturesEnabled:(BOOL)itemPicturesEnabled {
self.dataSource.itemPicturesEnabled = itemPicturesEnabled;
}
- (NSArray *)selection {
// There might be bogus items set via setSelection, so we need to check against
// datasource and filter them out.
NSMutableArray* validSelection = [[[NSMutableArray alloc] init] autorelease];
for (FBGraphObject *item in self.selectionManager.selection) {
NSIndexPath* indexPath = [self.dataSource indexPathForItem:item];
if (indexPath != nil) {
[validSelection addObject:item];
}
}
return validSelection;
}
- (void)setSelection:(NSArray *)selection {
[self.selectionManager selectItem:selection tableView:self.tableView];
}
// We don't really need to store session, let the loader hold it.
- (void)setSession:(FBSession *)session {
if (session != _session) {
[self removeSessionObserver:_session];
[_session release];
_session = [session retain];
[self addSessionObserver:session];
self.loader.session = session;
self.trackActiveSession = (session == nil);
}
}
#pragma mark - Public Methods
- (void)viewDidLoad
{
[super viewDidLoad];
[FBLogger registerCurrentTime:FBLoggingBehaviorPerformanceCharacteristics
withTag:self];
CGRect bounds = self.canvasView.bounds;
if (!self.tableView) {
UITableView *tableView = [[[UITableView alloc] initWithFrame:bounds] autorelease];
tableView.autoresizingMask =
UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.tableView = tableView;
[self.canvasView addSubview:tableView];
}
if (!self.spinner) {
UIActivityIndicatorView *spinner = [[[UIActivityIndicatorView alloc]
initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray]
autorelease];
spinner.hidesWhenStopped = YES;
// We want user to be able to scroll while we load.
spinner.userInteractionEnabled = NO;
self.spinner = spinner;
[self.canvasView addSubview:spinner];
}
self.selectionManager.allowsMultipleSelection = self.allowsMultipleSelection;
self.tableView.delegate = self.selectionManager;
[self.dataSource bindTableView:self.tableView];
self.loader.tableView = self.tableView;
}
- (void)viewDidUnload {
[super viewDidUnload];
self.loader.tableView = nil;
self.spinner = nil;
self.tableView = nil;
}
- (void)configureUsingCachedDescriptor:(FBCacheDescriptor*)cacheDescriptor {
if (![cacheDescriptor isKindOfClass:[FBFriendPickerCacheDescriptor class]]) {
[[NSException exceptionWithName:FBInvalidOperationException
reason:@"FBFriendPickerViewController: An attempt was made to configure "
@"an instance with a cache descriptor object that was not created "
@"by the FBFriendPickerViewController class"
userInfo:nil]
raise];
}
FBFriendPickerCacheDescriptor *cd = (FBFriendPickerCacheDescriptor*)cacheDescriptor;
self.userID = cd.userID;
self.fieldsForRequest = cd.fieldsForRequest;
}
- (void)loadData {
// when the app calls loadData,
// if we don't have a session and there is
// an open active session, use that
if (!self.session ||
(self.trackActiveSession && ![self.session isEqual:[FBSession activeSessionIfOpen]])) {
self.session = [FBSession activeSessionIfOpen];
self.trackActiveSession = YES;
}
[self loadDataSkippingRoundTripIfCached:[NSNumber numberWithBool:YES]];
}
- (void)updateView {
[self.dataSource update];
[self.tableView reloadData];
}
- (void)clearSelection {
[self.selectionManager clearSelectionInTableView:self.tableView];
}
- (void)addSessionObserver:(FBSession *)session {
[session addObserver:self
forKeyPath:@"state"
options:NSKeyValueObservingOptionNew
context:nil];
}
- (void)removeSessionObserver:(FBSession *)session {
[session removeObserver:self
forKeyPath:@"state"];
}
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary *)change
context:(void *)context {
if ([object isEqual:self.session] &&
self.session.isOpen == NO) {
[self clearData];
}
}
- (void)clearData {
[self.dataSource clearGraphObjects];
[self.selectionManager clearSelectionInTableView:self.tableView];
[self.tableView reloadData];
[self.loader reset];
}
#pragma mark - public class members
+ (FBCacheDescriptor*)cacheDescriptor {
return [[[FBFriendPickerCacheDescriptor alloc] init] autorelease];
}
+ (FBCacheDescriptor*)cacheDescriptorWithUserID:(NSString*)userID
fieldsForRequest:(NSSet*)fieldsForRequest {
return [[[FBFriendPickerCacheDescriptor alloc] initWithUserID:userID
fieldsForRequest:fieldsForRequest]
autorelease];
}
#pragma mark - private members
- (FBRequest*)requestForLoadData {
// Respect user settings in case they have changed.
NSMutableArray *sortFields = [NSMutableArray array];
NSString *groupByField = nil;
if (self.sortOrdering == FBFriendSortByFirstName) {
[sortFields addObject:@"first_name"];
[sortFields addObject:@"middle_name"];
[sortFields addObject:@"last_name"];
groupByField = @"first_name";
} else {
[sortFields addObject:@"last_name"];
[sortFields addObject:@"first_name"];
[sortFields addObject:@"middle_name"];
groupByField = @"last_name";
}
[self.dataSource setSortingByFields:sortFields ascending:YES];
self.dataSource.groupByField = groupByField;
self.dataSource.useCollation = YES;
// me or one of my friends that also uses the app
NSString *user = self.userID;
if (!user) {
user = @"me";
}
// create the request and start the loader
FBRequest *request = [FBFriendPickerViewController requestWithUserID:user
fields:self.fieldsForRequest
dataSource:self.dataSource
session:self.session];
return request;
}
- (void)loadDataSkippingRoundTripIfCached:(NSNumber*)skipRoundTripIfCached {
if (self.session) {
[self.loader startLoadingWithRequest:[self requestForLoadData]
cacheIdentity:FBFriendPickerCacheIdentity
skipRoundtripIfCached:skipRoundTripIfCached.boolValue];
}
}
+ (FBRequest*)requestWithUserID:(NSString*)userID
fields:(NSSet*)fields
dataSource:(FBGraphObjectTableDataSource*)datasource
session:(FBSession*)session {
FBRequest *request = [FBRequest requestForGraphPath:[NSString stringWithFormat:@"%@/friends", userID]];
[request setSession:session];
// Use field expansion to fetch a 100px wide picture if we're on a retina device.
NSString *pictureField = ([FBUtility isRetinaDisplay]) ? @"picture.width(100).height(100)" : @"picture";
NSString *allFields = [datasource fieldsForRequestIncluding:fields,
@"id",
@"name",
@"first_name",
@"middle_name",
@"last_name",
pictureField,
nil];
[request.parameters setObject:allFields forKey:@"fields"];
return request;
}
- (void)centerAndStartSpinner {
[FBUtility centerView:self.spinner tableView:self.tableView];
[self.spinner startAnimating];
}
- (void)logAppEvents:(BOOL)cancelled {
[FBAppEvents logImplicitEvent:FBAppEventNameFriendPickerUsage
valueToSum:nil
parameters:@{ FBAppEventParameterDialogOutcome : (cancelled
? FBAppEventsDialogOutcomeValue_Cancelled
: FBAppEventsDialogOutcomeValue_Completed),
@"num_friends_picked" : [NSNumber numberWithUnsignedInteger:self.selection.count]
}
session:self.session];
}
#pragma mark - FBGraphObjectSelectionChangedDelegate
- (void)graphObjectTableSelectionDidChange:(FBGraphObjectTableSelection *)selection {
if ([self.delegate respondsToSelector:
@selector(friendPickerViewControllerSelectionDidChange:)]) {
[(id)self.delegate friendPickerViewControllerSelectionDidChange:self];
}
}
#pragma mark - FBGraphObjectViewControllerDelegate
- (BOOL)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
filterIncludesItem:(id<FBGraphObject>)item {
id<FBGraphUser> user = (id<FBGraphUser>)item;
if ([self.delegate
respondsToSelector:@selector(friendPickerViewController:shouldIncludeUser:)]) {
return [(id)self.delegate friendPickerViewController:self
shouldIncludeUser:user];
} else {
return YES;
}
}
- (NSString *)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
titleOfItem:(id<FBGraphUser>)graphUser {
// Title is either "First Middle" or "Last" depending on display order.
if (self.displayOrdering == FBFriendDisplayByFirstName) {
if (graphUser.middle_name) {
return [NSString stringWithFormat:@"%@ %@", graphUser.first_name, graphUser.middle_name];
} else {
return graphUser.first_name;
}
} else {
return graphUser.last_name;
}
}
- (NSString *)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
titleSuffixOfItem:(id<FBGraphUser>)graphUser {
// Title suffix is either "Last" or "First Middle" depending on display order.
if (self.displayOrdering == FBFriendDisplayByLastName) {
if (graphUser.middle_name) {
return [NSString stringWithFormat:@"%@ %@", graphUser.first_name, graphUser.middle_name];
} else {
return graphUser.first_name;
}
} else {
return graphUser.last_name;
}
}
- (NSString *)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
pictureUrlOfItem:(id<FBGraphObject>)graphObject {
id picture = [graphObject objectForKey:@"picture"];
// Depending on what migration the app is in, we may get back either a string, or a
// dictionary with a "data" property that is a dictionary containing a "url" property.
if ([picture isKindOfClass:[NSString class]]) {
return picture;
}
id data = [picture objectForKey:@"data"];
return [data objectForKey:@"url"];
}
- (void)graphObjectTableDataSource:(FBGraphObjectTableDataSource*)dataSource
customizeTableCell:(FBGraphObjectTableCell*)cell {
// We want to bold whichever part of the name we are sorting on.
cell.boldTitle = (self.sortOrdering == FBFriendSortByFirstName && self.displayOrdering == FBFriendDisplayByFirstName) ||
(self.sortOrdering == FBFriendSortByLastName && self.displayOrdering == FBFriendDisplayByLastName);
cell.boldTitleSuffix = (self.sortOrdering == FBFriendSortByFirstName && self.displayOrdering == FBFriendDisplayByLastName) ||
(self.sortOrdering == FBFriendSortByLastName && self.displayOrdering == FBFriendDisplayByFirstName);
}
#pragma mark FBGraphObjectPagingLoaderDelegate members
- (void)pagingLoader:(FBGraphObjectPagingLoader*)pagingLoader willLoadURL:(NSString*)url {
[self centerAndStartSpinner];
}
- (void)pagingLoader:(FBGraphObjectPagingLoader*)pagingLoader didLoadData:(NSDictionary*)results {
// This logging currently goes here because we're effectively complete with our initial view when
// the first page of results come back. In the future, when we do caching, we will need to move
// this to a more appropriate place (e.g., after the cache has been brought in).
[FBLogger singleShotLogEntry:FBLoggingBehaviorPerformanceCharacteristics
timestampTag:self
formatString:@"Friend Picker: first render "]; // logger will append "%d msec"
if ([self.delegate respondsToSelector:@selector(friendPickerViewControllerDataDidChange:)]) {
[(id)self.delegate friendPickerViewControllerDataDidChange:self];
}
}
- (void)pagingLoaderDidFinishLoading:(FBGraphObjectPagingLoader *)pagingLoader {
// finished loading, stop animating
[self.spinner stopAnimating];
// Call the delegate from here as well, since this might be the first response of a query
// that has no results.
if ([self.delegate respondsToSelector:@selector(friendPickerViewControllerDataDidChange:)]) {
[(id)self.delegate friendPickerViewControllerDataDidChange:self];
}
// if our current display is from cache, then kick-off a near-term refresh
if (pagingLoader.isResultFromCache) {
[self performSelector:@selector(loadDataSkippingRoundTripIfCached:)
withObject:[NSNumber numberWithBool:NO]
afterDelay:FBRefreshCacheDelaySeconds];
}
}
- (void)pagingLoader:(FBGraphObjectPagingLoader*)pagingLoader handleError:(NSError*)error {
if ([self.delegate
respondsToSelector:@selector(friendPickerViewController:handleError:)]) {
[(id)self.delegate friendPickerViewController:self handleError:error];
}
}
- (void)pagingLoaderWasCancelled:(FBGraphObjectPagingLoader*)pagingLoader {
[self.spinner stopAnimating];
}
@end