class DataRepository {
	
	async function getDataById(id) {
		const connect = await checkConnection();
		if (connect) {
		   return await serverRepository.getDataByIdFromServer(id);
		}
		return localRepository.getDataByIdFromCache(data);
	}

	async function saveData(data) {
		const connect = await checkConnection();
		if (connect) {
		   return await serverRepository.saveDataToServer(data);
		}
		return localRepository.saveDataToCache(data);
	}

	async function checkConnection() {
		// call ping API if difference code 200 return false
	}

	function syncDataToServer() {
		const dataList = getDataListFromCache(size);
		if (dataList.length) {
			const connect = await checkConnection();
			if (connect) {
				syncDataToServer(dataList);
			}
		}
	}
    

    startInterval(syncDataToServer, time);
}