Telegram/Telegraph/TGBridgeStickersService.m

#import "TGBridgeStickersService.h"
#import "TGBridgeServer.h"

#import "TGStickersSignals.h"
#import "TGBridgeStickerPack+TGStickerPack.h"

NSString *const TGBridgeStickersDataFileName = @"stickers.data";
NSString *const TGBridgeStickersSentImagesFileName = @"stickers.imgs";

@interface TGBridgeStickersService ()
{
    SSignal *_stickersSignal;
    SMetaDisposable *_disposable;
}

@property (nonatomic, weak) TGBridgeServer *server;

@end


@implementation TGBridgeStickersService

- (instancetype)initWithServer:(TGBridgeServer *)server
{
    self = [super init];
    if (self != nil)
    {
        self.server = server;
        
        _stickersSignal = [server serviceSignalForKey:@"stickers" producer:^SSignal *
        {
            return [TGStickersSignals stickerPacks];
        }];
        
        __weak TGBridgeStickersService *weakSelf = self;
        _disposable = [[SMetaDisposable alloc] init];
        [_disposable setDisposable:[_stickersSignal startWithNext:^(NSDictionary *next)
        {
            __strong TGBridgeStickersService *strongSelf = weakSelf;
            if (strongSelf == nil)
                return;
            
            NSArray *stickerPacks = next[@"packs"];
            NSMutableArray *bridgeStickerPacks = [[NSMutableArray alloc] init];
            
            for (TGStickerPack *stickerPack in stickerPacks)
            {
                TGBridgeStickerPack *bridgeStickerPack = [TGBridgeStickerPack stickerPackWithTGStickerPack:stickerPack];
                if (bridgeStickerPack != nil)
                    [bridgeStickerPacks addObject:bridgeStickerPack];
            }
            
            NSData *data = [NSKeyedArchiver archivedDataWithRootObject:bridgeStickerPacks];
            NSURL *url = [NSURL URLWithString:TGBridgeStickersDataFileName relativeToURL:strongSelf.server.temporaryFilesURL];
            [data writeToURL:url atomically:true];
            
            [server sendFileWithURL:url key:@"stickers"];
        }]];
    }
    return self;
}

@end