Conversation History Refactoring - Exceptions and Dialogues

[milkdromeda]

• Dialogues: used to notify the user of an invalid action/use case (these mistakes are preventable)
• Exceptions
  • Intended usage: use run time exceptions to indicate precondition violations and other exceptions when an unpreventable issue arises
  • A specific place to use exceptions (for unpreventable issues): For the method User.getChatByID to run successfully, the specified chatID must correspond to a chat in the system. However, if the storage gets mutated accidentally while the program is running, getChatByID may not work as intended and an exception should be used.