Services

User Service

• Methods encapsulating DAO logic: createUser, updateUser, removeUser, getAllUsers, getUserById, getUserByUsername
• Business logic methods:
  • authenticate - checks if given username and password hash is valid
  • isAdmin - checks if given user is an administrator

Channel Service

• Methods encapsulating DAO logic: createChannel, updateChannel, removeChannel, getAllChannels, getChannelById, getChannelByName, getChannelsByType

Transmission Service

This service covers both Transmission and Transmission Occurrences. The reason is Transmission Occurrence is an integral part of Transmission and cannot, in business logic, exist separately.

• Methods encapsulating DAO logic: createTransmission, updateTransmission, removeTransmission, getTransmissionById, getTransmissionByName, getTransmissionsByType
• Methods encapsulating DAO logic for Transmission Occurrences: addOccurrence, updateOccurrence, removeOccurrence
• Business logic methods:
  • getOccurrences - gets all occurrences of the transmission, incl. occurrences in history
  • getUpcomingOccurrences - gets all upcoming occurrences of the transmission
  • getVotings - gets all votings for the transmission
  • getAverageVoting - gets average numeric voting for the transmission

Voting Service

• Methods encapsulating DAO logic: createVoting, updateVoting, removeVoting, getVotingsByTransmission, getVotingsByUser

Favorite Channels Service

• Business logic methods:
  • followChannel - add channel to user favorites
  • unfollowChannel - remove channel from user favorites
  • getFavoriteChannels - get all users favorite channels

Favorite Transmissions Service

• Business logic methods:
  • followTransmission
  • unfollowTransmission
  • getFavoriteTransmissionsByUser
  • getUpcomingFavoriteTransmissionsByUser - get upcoming favorite transmissions (maximum time span shall be specified)

Schedule Service

• Business logic methods:
  • getSchedule - get schedule for specified list of channel and specified date time range

Helper Services

• ObjectMapperService - maps one object to another (for DAO <-> DTO)
• DateTimeService - for getting date time rather than by direct usage of LocalDateTime, for better testability
• StatisticsService - calculates simple statistics, for more complex business functionality demonstration