forked from facebook/facebook-ios-sdk
/
FBPlacePickerViewController.m
534 lines (440 loc) · 19 KB
/
FBPlacePickerViewController.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
/*
* Copyright 2012 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 "FBError.h"
#import "FBGraphObjectPagingLoader.h"
#import "FBGraphObjectTableDataSource.h"
#import "FBGraphObjectTableSelection.h"
#import "FBLogger.h"
#import "FBPlacePickerViewController.h"
#import "FBRequest.h"
#import "FBRequestConnection.h"
#import "FBUtility.h"
#import "FBPlacePickerCacheDescriptor.h"
#import "FBSession+Internal.h"
#import "FBSettings.h"
NSString *const FBPlacePickerCacheIdentity = @"FBPlacePicker";
static const NSInteger searchTextChangedTimerInterval = 2;
const NSInteger defaultResultsLimit = 100;
const NSInteger defaultRadius = 1000; // 1km
static NSString *defaultImageName = @"FacebookSDKResources.bundle/FBPlacePickerView/images/fb_generic_place.png";
@interface FBPlacePickerViewController () <FBGraphObjectSelectionChangedDelegate,
FBGraphObjectViewControllerDelegate,
FBGraphObjectPagingLoaderDelegate>
@property (nonatomic, retain) FBGraphObjectTableDataSource *dataSource;
@property (nonatomic, retain) FBGraphObjectTableSelection *selectionManager;
@property (nonatomic, retain) FBGraphObjectPagingLoader *loader;
@property (nonatomic, retain) NSTimer *searchTextChangedTimer;
@property (nonatomic) BOOL trackActiveSession;
- (void)initialize;
- (void)loadDataPostThrottleSkippingRoundTripIfCached:(NSNumber*)skipRoundTripIfCached;
- (NSTimer *)createSearchTextChangedTimer;
- (void)updateView;
- (void)centerAndStartSpinner;
- (void)addSessionObserver:(FBSession*)session;
- (void)removeSessionObserver:(FBSession*)session;
- (void)clearData;
@end
@implementation FBPlacePickerViewController {
BOOL _hasSearchTextChangedSinceLastQuery;
}
@synthesize dataSource = _dataSource;
@synthesize delegate = _delegate;
@synthesize fieldsForRequest = _fieldsForRequest;
@synthesize loader = _loader;
@synthesize locationCoordinate = _locationCoordinate;
@synthesize radiusInMeters = _radiusInMeters;
@synthesize resultsLimit = _resultsLimit;
@synthesize searchText = _searchText;
@synthesize searchTextChangedTimer = _searchTextChangedTimer;
@synthesize selectionManager = _selectionManager;
@synthesize spinner = _spinner;
@synthesize tableView = _tableView;
@synthesize session = _session;
@synthesize trackActiveSession = _trackActiveSession;
- (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 = [UIImage imageNamed:defaultImageName];
dataSource.controllerDelegate = self;
dataSource.itemSubtitleEnabled = YES;
// Selection Manager
FBGraphObjectTableSelection *selectionManager = [[[FBGraphObjectTableSelection alloc]
initWithDataSource:dataSource]
autorelease];
selectionManager.delegate = self;
// Paging loader
id loader = [[[FBGraphObjectPagingLoader alloc] initWithDataSource:dataSource
pagingMode:FBGraphObjectPagingModeAsNeeded]
autorelease];
self.loader = loader;
self.loader.delegate = self;
// Self
self.dataSource = dataSource;
self.delegate = nil;
self.selectionManager = selectionManager;
self.selectionManager.allowsMultipleSelection = NO;
self.resultsLimit = defaultResultsLimit;
self.radiusInMeters = defaultRadius;
self.itemPicturesEnabled = YES;
self.trackActiveSession = YES;
}
- (void)dealloc
{
[_loader cancel];
_loader.delegate = nil;
[_loader release];
_dataSource.controllerDelegate = nil;
[_dataSource release];
[_fieldsForRequest release];
[_searchText release];
[_searchTextChangedTimer release];
[_selectionManager release];
[_spinner release];
[_tableView release];
[self removeSessionObserver:_session];
[_session release];
[super dealloc];
}
#pragma mark - Custom Properties
- (BOOL)itemPicturesEnabled
{
return self.dataSource.itemPicturesEnabled;
}
- (void)setItemPicturesEnabled:(BOOL)itemPicturesEnabled
{
self.dataSource.itemPicturesEnabled = itemPicturesEnabled;
}
- (id<FBGraphPlace>)selection
{
NSArray *selection = self.selectionManager.selection;
if ([selection count]) {
return [selection objectAtIndex:0];
} else {
return nil;
}
}
- (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)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;
}
// Sending a request on every keystroke is wasteful of bandwidth. Send a
// request the first time the user types something, then set up a 2-second timer
// and send whatever changes the user has made since then. (If nothing has changed
// in 2 seconds, we reset so the next change will cause an immediate re-query.)
if (!self.searchTextChangedTimer) {
self.searchTextChangedTimer = [self createSearchTextChangedTimer];
[self loadDataPostThrottleSkippingRoundTripIfCached:[NSNumber numberWithBool:YES]];
} else {
_hasSearchTextChangedSinceLastQuery = YES;
}
}
- (void)configureUsingCachedDescriptor:(FBCacheDescriptor*)cacheDescriptor {
if (![cacheDescriptor isKindOfClass:[FBPlacePickerCacheDescriptor class]]) {
[[NSException exceptionWithName:FBInvalidOperationException
reason:@"FBPlacePickerViewController: An attempt was made to configure "
@"an instance with a cache descriptor object that was not created "
@"by the FBPlacePickerViewController class"
userInfo:nil]
raise];
}
FBPlacePickerCacheDescriptor *cd = (FBPlacePickerCacheDescriptor*)cacheDescriptor;
self.locationCoordinate = cd.locationCoordinate;
self.radiusInMeters = cd.radiusInMeters;
self.resultsLimit = cd.resultsLimit;
self.searchText = cd.searchText;
self.fieldsForRequest = cd.fieldsForRequest;
}
- (void)clearSelection {
[self.selectionManager clearSelectionInTableView:self.tableView];
}
#pragma mark - Public Class Methods
+ (FBCacheDescriptor*)cacheDescriptorWithLocationCoordinate:(CLLocationCoordinate2D)locationCoordinate
radiusInMeters:(NSInteger)radiusInMeters
searchText:(NSString*)searchText
resultsLimit:(NSInteger)resultsLimit
fieldsForRequest:(NSSet*)fieldsForRequest {
return [[[FBPlacePickerCacheDescriptor alloc] initWithLocationCoordinate:locationCoordinate
radiusInMeters:radiusInMeters
searchText:searchText
resultsLimit:resultsLimit
fieldsForRequest:fieldsForRequest]
autorelease];
}
#pragma mark - private 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.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;
}
+ (FBRequest*)requestForPlacesSearchAtCoordinate:(CLLocationCoordinate2D)coordinate
radiusInMeters:(NSInteger)radius
resultsLimit:(NSInteger)resultsLimit
searchText:(NSString*)searchText
fields:(NSSet*)fieldsForRequest
datasource:(FBGraphObjectTableDataSource*)datasource
session:(FBSession*)session {
FBRequest *request = [FBRequest requestForPlacesSearchAtCoordinate:coordinate
radiusInMeters:radius
resultsLimit:resultsLimit
searchText:searchText];
[request setSession:session];
NSString *fields = [datasource fieldsForRequestIncluding:fieldsForRequest,
@"id",
@"name",
@"location",
@"category",
@"picture",
@"were_here_count",
nil];
[request.parameters setObject:fields forKey:@"fields"];
return request;
}
- (void)loadDataPostThrottleSkippingRoundTripIfCached:(NSNumber*)skipRoundTripIfCached {
// Place queries require a session, so do nothing if we don't have one.
if (self.session) {
FBRequest *request = [FBPlacePickerViewController requestForPlacesSearchAtCoordinate:self.locationCoordinate
radiusInMeters:self.radiusInMeters
resultsLimit:self.resultsLimit
searchText:self.searchText
fields:self.fieldsForRequest
datasource:self.dataSource
session:self.session];
_hasSearchTextChangedSinceLastQuery = NO;
[self.loader startLoadingWithRequest:request
cacheIdentity:FBPlacePickerCacheIdentity
skipRoundtripIfCached:skipRoundTripIfCached.boolValue];
}
}
- (void)updateView
{
[self.dataSource update];
[self.tableView reloadData];
}
- (NSTimer *)createSearchTextChangedTimer {
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:searchTextChangedTimerInterval
target:self
selector:@selector(searchTextChangedTimerFired:)
userInfo:nil
repeats:YES];
return timer;
}
- (void)searchTextChangedTimerFired:(NSTimer *)timer
{
if (_hasSearchTextChangedSinceLastQuery) {
[self loadDataPostThrottleSkippingRoundTripIfCached:[NSNumber numberWithBool:YES]];
} else {
// Nothing has changed in 2 seconds. Invalidate and forget about this timer.
// Next time the user types, we will fire a query immediately again.
[self.searchTextChangedTimer invalidate];
self.searchTextChangedTimer = nil;
}
}
- (void)centerAndStartSpinner
{
[FBUtility centerView:self.spinner tableView:self.tableView];
[self.spinner startAnimating];
}
- (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 - FBGraphObjectSelectionChangedDelegate
- (void)graphObjectTableSelectionDidChange:
(FBGraphObjectTableSelection *)selection
{
if ([self.delegate respondsToSelector:
@selector(placePickerViewControllerSelectionDidChange:)]) {
[(id)self.delegate placePickerViewControllerSelectionDidChange:self];
}
}
#pragma mark - FBGraphObjectViewControllerDelegate
- (BOOL)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
filterIncludesItem:(id<FBGraphObject>)item
{
id<FBGraphPlace> place = (id<FBGraphPlace>)item;
if ([self.delegate
respondsToSelector:@selector(placePickerViewController:shouldIncludePlace:)]) {
return [(id)self.delegate placePickerViewController:self
shouldIncludePlace:place];
} else {
return YES;
}
}
- (NSString *)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
titleOfItem:(id<FBGraphObject>)graphObject
{
return [graphObject objectForKey:@"name"];
}
- (NSString *)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
subtitleOfItem:(id<FBGraphObject>)graphObject
{
NSString *category = [graphObject objectForKey:@"category"];
NSNumber *wereHereCount = [graphObject objectForKey:@"were_here_count"];
if (wereHereCount) {
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
NSString *wereHere = [numberFormatter stringFromNumber:wereHereCount];
[numberFormatter release];
if (category) {
return [NSString stringWithFormat:@"%@ • %@ were here", [category capitalizedString], wereHere];
}
return [NSString stringWithFormat:@"%@ were here", wereHere];
}
if (category) {
return [category capitalizedString];
}
return nil;
}
- (NSString *)graphObjectTableDataSource:(FBGraphObjectTableDataSource *)dataSource
pictureUrlOfItem:(id<FBGraphObject>)graphObject
{
return [graphObject objectForKey:@"picture"];
}
#pragma mark FBGraphObjectPagingLoaderDelegate members
- (void)pagingLoader:(FBGraphObjectPagingLoader*)pagingLoader willLoadURL:(NSString*)url {
// We only want to display our spinner on loading the first page. After that,
// a spinner will display in the last cell to indicate to the user that data is loading.
if ([self.dataSource numberOfSectionsInTableView:self.tableView] == 0) {
[self centerAndStartSpinner];
}
}
- (void)pagingLoader:(FBGraphObjectPagingLoader*)pagingLoader didLoadData:(NSDictionary*)results {
[self.spinner stopAnimating];
// 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:@"Places Picker: first render "]; // logger will append "%d msec"
if ([self.delegate respondsToSelector:@selector(placePickerViewControllerDataDidChange:)]) {
[(id)self.delegate placePickerViewControllerDataDidChange:self];
}
}
- (void)pagingLoaderDidFinishLoading:(FBGraphObjectPagingLoader *)pagingLoader {
// No more results, stop spinner
[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(placePickerViewControllerDataDidChange:)]) {
[(id)self.delegate placePickerViewControllerDataDidChange:self];
}
// if our current display is from cache, then kick-off a near-term refresh
if (pagingLoader.isResultFromCache) {
[self loadDataPostThrottleSkippingRoundTripIfCached:[NSNumber numberWithBool:NO]];
}
}
- (void)pagingLoader:(FBGraphObjectPagingLoader*)pagingLoader handleError:(NSError*)error {
if ([self.delegate respondsToSelector:@selector(placePickerViewController:handleError:)]) {
[(id)self.delegate placePickerViewController:self handleError:error];
}
}
- (void)pagingLoaderWasCancelled:(FBGraphObjectPagingLoader*)pagingLoader {
[self.spinner stopAnimating];
}
@end