/**
* @author Bogdan Sliptsov
* <p>This method returns true if user is a group-creator and has rights to modify group and
* returns false if user doesn't have admin rights.
*/
public boolean isCreator(Long groupId, String deviceId) {
if (groupId == null) return false;
if (StringUtils.isEmpty(deviceId)) return false;
Group group = findById(groupId);
if (group == null) return false;
Device device = devicesDao.read(deviceId);
if (device == null) return false;
if (!group.getIdCreator().equals(deviceId)) return false;
return true;
}
/**
* @author Bogdan Sliptsov
* <p>User-story, 2 point. User can create group
* <p>This method is used to create new group.
* @param groupName Name of new group.
* @param groupType Type of new group(0 - open, 1 - pass, 2 - moderate)
* @param password Password of new group. Only if groupType equals 1.
* @param creatorId Identifier of requested device.
* @param coordinateX X coordinate of requested device.
* @param coordinateY Y coordinate of requested device.
* @return Long This returns unique identifier of just created group. Null 1. If groupName equals
* null; 2. If groupType null or != [0, 1, 2]; 3. If groupType equals 1 but password is null
* or empty; 4. If creatorId is null; 5. If requested device doesn't exist. 6. If X or Y
* coordinate equals null.
*/
public Long createGroup(
String groupName,
Byte groupType,
String password,
String creatorId,
Double coordinateX,
Double coordinateY) {
if (StringUtils.isEmpty(groupName)) return null;
if (groupType == null || groupType < 0 || groupType > 2) return null;
if (groupType.equals(new Byte(String.valueOf(1))) && StringUtils.isEmpty(password)) return null;
if (StringUtils.isEmpty(creatorId)) return null;
if (devicesDao.read(creatorId) == null) return null;
if (coordinateX == null || coordinateY == null) return null;
return groupDao.create(
new Group(
groupName,
groupType,
password,
creatorId,
coordinateX,
coordinateY,
new ArrayList<Device>(Arrays.asList(devicesDao.read(creatorId)))));
}
/**
* @author Bogdan Sliptsov
* <p>This method is used to add device to requested group if group and device exists.
* @param groupId Unique group identifier.
* @param deviceId Unique device identifier.
*/
public void addDeviceToGroup(Long groupId, String deviceId) {
if (groupId == null || StringUtils.isEmpty(deviceId)) return;
if (groupDao.read(groupId) == null) return;
if (groupDao.read(groupId).getDevices().contains(devicesDao.read(deviceId))) return;
groupDao.addDeviceToGroup(groupId, devicesDao.read(deviceId));
}
/**
* @author Bogdan Sliptsov
* <p>This method is used to delete device from requested group if group exists; device
* exists; devices exists in list of devices of requested group.
* @param groupId Unique group identifier.
* @param deviceId Unique device identifier.
*/
public void deleteDeviceFromGroup(Long groupId, String deviceId) {
if (groupId == null || StringUtils.isEmpty(deviceId)) return;
if (groupDao.read(groupId) == null) return;
if (!groupDao.read(groupId).getDevices().contains(devicesDao.read(deviceId))) return;
groupDao.deleteDeviceFromGroup(groupId, deviceId);
}