template for base collection vc

//
//  ZHHotRankViewController.h
//  ZHModuleFeed
//
//  Created by 马骁 on 28/09/2017.
//

#import <ZHMiddlewareList/ZHCKBaseCollectionViewController.h>
NS_ASSUME_NONNULL_BEGIN

/// New hot rank view controller
@interface ZHHotRankViewController : ZHCKBaseCollectionViewController

@property (nonatomic, readonly) NSString *listPath;

- (instancetype)initWithListPath:(NSString *)path;

@end
NS_ASSUME_NONNULL_END



//
//  ZHHotRankViewController.m
//  ZHModuleFeed
//
//  Created by 马骁 on 28/09/2017.
//

#import "ZHHotRankViewController.h"
#import <ZHMiddlewareList/ZHFixedWidthFlowLayout.h>
#import <ZHMiddlewareList/ZHMiddlewareList.h>

#import <ComponentKit/ComponentKit.h>

// za
#import <ZHCoreViewController/UIViewController+ZATracker.h>
#import <ZHCoreZASDK/NSObject+ZTracker.h>
#import <ZHCoreZASDK/ZASDK.h>
#import <ZHMiddlewareZAAutomation/ZHEventEmiter.h>

// util
#import <ZHBasicCommon/ZHMacros.h>
#import <ZHCoreTheme/ZHCoreTheme.h>
#import <ZHCoreFont/UIFont+Zhihu.h>

#import "ZHHotRankFeed.h"

@interface ZHHotRankViewController (){
    BOOL _fetchingOnAppear;
}

@end

@implementation ZHHotRankViewController

- (nonnull instancetype)initWithListPath:(nonnull NSString *)path {
    ZHListCursorFetcher *fetcher = [[ZHListCursorFetcher alloc] initWithPath:path modelGenerator:^id _Nullable(id  _Nonnull aJSONObject) {
        //id obj = [[ZHObjectFactory sharedFactory] objectWithProperties:aJSONObject];
        
        return nil;
    }];
    ZHListViewModel *vm = [[ZHListViewModel alloc] initWithFetcher:fetcher cacheProvider:[PINCache sharedCache]];
    vm.useCache = NO;
    vm.fetchLimit = 10; //优化加载速度.
    UICollectionViewFlowLayout *flowLayout = [[ZHFixedWidthFlowLayout alloc] init];
    [flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];
    [flowLayout setMinimumInteritemSpacing:0];
    [flowLayout setMinimumLineSpacing:[ZHCKBaseCollectionViewController marginTopForCardStyle]];
    self = [super initWithCollectionViewLayout:flowLayout viewModel:vm];
    if (self) {
        _listPath = path;
        _fetchingOnAppear= YES;
    }
    return self;
}

- (void)dealloc{
    THEME_REMOVE_SELF;
}

- (void)viewDidLoad {
    [super viewDidLoad];

    // za
    [self setIsZaEventRootLayer:YES];
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    if (self->_fetchingOnAppear) {
        self->_fetchingOnAppear = NO;
        [self backToTopWithRefreshing:YES];
    }
}

#pragma mark-- UICollectionViewDelegate

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
    if ([[self superclass] instancesRespondToSelector:@selector(scrollViewDidEndDragging:willDecelerate:)]) {
        [super scrollViewDidEndDragging:scrollView willDecelerate:decelerate];
    }

    if (decelerate == NO) {
        [self recordVisibleCellCardShow];
    }
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    if ([[self superclass] instancesRespondToSelector:@selector(scrollViewDidEndDecelerating:)]) {
        [super scrollViewDidEndDecelerating:scrollView];
    }
    [self recordVisibleCellCardShow];
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    id model = [self.dataSource modelForItemAtIndexPath:indexPath];
//    if ([model isKindOfClass:ZHFeed.class]) {
//        [self navigateWithFeed:(ZHFeed *)model];
//    }
}

- (void)collectionView:(UICollectionView *)collectionView
       willDisplayCell:(UICollectionViewCell *)cell
    forItemAtIndexPath:(NSIndexPath *)indexPath {
    if ([[self superclass] instancesRespondToSelector:@selector(collectionView:willDisplayCell:forItemAtIndexPath:)]) {
        [super collectionView:collectionView willDisplayCell:cell forItemAtIndexPath:indexPath];
    }

    /* Legacy support for lastReadTouch */
    id rowModel = (NSObject *)[self.dataSource modelForItemAtIndexPath:indexPath];
    // CardShow
    [self logCardShowWithCell:cell
                    indexPath:indexPath
                   scrollView:collectionView
                     rowModel:rowModel];

}

- (UIEdgeInsets)defaultContentInset {
    UIEdgeInsets insets = [super defaultContentInset];
    insets.top = insets.top + [self.class marginTopForCardStyle];
    return [self insetWithBottomBar:insets];
}

#pragma mark - Private

- (void)recordVisibleCellCardShow {
    UICollectionView *t = self.collectionView;

    NSArray<__kindof UICollectionViewCell *> *cells = [t visibleCells];

    [cells enumerateObjectsUsingBlock:^(UICollectionViewCell * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        NSIndexPath *indexPath = [t indexPathForCell:obj];
        id rowModel = [self.dataSource modelForItemAtIndexPath:indexPath];

        [self logCardShowWithCell:obj
                        indexPath:indexPath
                       scrollView:t
                         rowModel:rowModel];
    }];
}

- (void)logCardShowWithCell:(UIView *)cell
                  indexPath:(NSIndexPath *)indexPath
                 scrollView:(UIScrollView *)scrollView
                   rowModel:(NSObject *)rowModel {

    if ([scrollView logCardShowDiabled] ||
        rowModel.hasTracked ||
        scrollView.tracking) {
        return;
    }

    [rowModel setHasTracked:YES];
    [cell logCardShowInPageWithName:self.zaViewName];
}

#pragma mark - ComponentProvider

+ (CKComponent *)componentForModel:(id<NSObject>)model context:(id<NSObject>)context {
    if ([model isKindOfClass:ZHFeed.class]) {
//        return [ZHCKActivityComponent newWithFeed:(ZHFeed *)model context:(ZHCKCommonContext *)context];
    }
    return [super componentForModel:model context:context];
}

#pragma mark - ZA

- (ViewLocation *)zaLayerViewLocation {
    return [ViewLocation createWithBuilder:^(ViewLocation *v) {
        v.module = Module_Type_FeedList;
    }];
}

- (ModuleInfo *)zaLayerModuleInfo {
    return [ModuleInfo createWithBuilder:^(ModuleInfo *m) {
        m.list.listSize = (int32_t)self.viewModel.objects.count;
    }];
}

- (ZHZaEventEmiter *)eventEmiter {
    return [[ZHZaEventEmiter alloc] initWithZaViewName:self.zaViewName];
}

@end