MVVMTableViewListDataSource

MVVMTableViewListDataSource.h

@import Foundation;
@import UIKit;


typedef UITableViewCell *(^MVVMCellCreatorBlock)(UITableView * tableView, NSIndexPath * indexPath, id object);


@interface MVVMTableViewListDataSource : NSObject <UITableViewDataSource>

- (id)initWithObjects:(NSArray *)objects cellCreator:(MVVMCellCreatorBlock)block;

@property (nonatomic, copy) NSArray * objects;

@property (nonatomic, strong, readonly) RACSignal * objectsUpdateSignal;

@end


//////////////////////////////////


#import "MVVMTableViewListDataSource.h"

@interface MVVMTableViewListDataSource ()

@property (nonatomic, strong, readwrite) RACSignal * objectsUpdateSignal;

@property (nonatomic, copy) MVVMCellCreatorBlock cellCreator;

@end


@implementation MVVMTableViewListDataSource

- (id)initWithObjects:(NSArray *)objects cellCreator:(MVVMCellCreatorBlock)block {
    
    NSParameterAssert(block);
    
    if ((self = [super init])) {
        _cellCreator = block;
        _objects = objects ?: @[];
        _objectsUpdateSignal = RACObserve(self, objects);
    }
    
    return self;
}


#pragma mark - UITableViewDataSource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [self.objects count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    NSAssert(self.cellCreator, @"No cell creator.");
    
    return self.cellCreator(tableView, indexPath, self.objects[indexPath.row]);
}