IGListKit/Examples/Examples-iOS/IGListKitExamples/ViewControllers/ObjcDemoViewController.m

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#import "ObjcDemoViewController.h"

@import IGListKit;

#import "Post.h"
#import "PostSectionController.h"

@interface ObjcDemoViewController () <IGListAdapterDataSource>

@property (nonatomic, strong) UICollectionView *collectionView;
@property (nonatomic, strong) IGListAdapter *adapter;
@property (nonatomic, copy) NSArray<Post *> *data;

@end


@implementation ObjcDemoViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.data = @[
                  [[Post alloc] initWithUsername:@"userA" comments:@[
                                                                     @"Luminous triangle",
                                                                     @"Awesome",
                                                                     @"Super clean",
                                                                     @"Stunning shot",
                                                                     ]],
                  [[Post alloc] initWithUsername:@"userB" comments:@[
                                                                     @"The simplicity here is superb",
                                                                     @"thanks!",
                                                                     @"That's always so kind of you!",
                                                                     @"I think you might like this",
                                                                     ]],
                  [[Post alloc] initWithUsername:@"userC" comments:@[
                                                                     @"So good",
                                                                     ]],
                  [[Post alloc] initWithUsername:@"userD" comments:@[
                                                                     @"hope she might like it.",
                                                                     @"I love it."
                                                                     ]],
                  ];

    self.collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero
                                             collectionViewLayout:[UICollectionViewFlowLayout new]];
    [self.view addSubview:self.collectionView];
    self.adapter = [[IGListAdapter alloc] initWithUpdater:[[IGListAdapterUpdater alloc] init]
                                           viewController:self];

    self.adapter.collectionView = self.collectionView;
    self.adapter.dataSource = self;
}

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];
    self.collectionView.frame = self.view.bounds;
}

#pragma mark - IGListAdapterDataSource

- (NSArray<id<IGListDiffable>> *)objectsForListAdapter:(IGListAdapter *)listAdapter {
    return self.data;
}

- (IGListSectionController *)listAdapter:(IGListAdapter *)listAdapter sectionControllerForObject:(id)object {
    return [PostSectionController new];
}

- (UIView *)emptyViewForListAdapter:(IGListAdapter *)listAdapter {
    return nil;
}

@end