W-Akrabi
commented
6 days ago Thank you for the feedback, the although the EventDAO isnt fully complete since the database doesnt exist, i think we are good to go
Closed W-Akrabi closed 6 days ago
W-Akrabi
commented
6 days ago Thank you for the feedback, the although the EventDAO isnt fully complete since the database doesnt exist, i think we are good to go
This use case allows users to search for events, and the search can be filtered using tags or other criteria. The main flow of the use case is that when a user performs a search, the system retrieves a list of events that match the search query. If no events match, the system displays an error message to inform the user.
Components Involved:
SearchPresenter: This is the class responsible for handling the logic related to the search functionality. It interacts with the data layer, processes the search query, and determines whether any events match the search criteria. It calls the setResults() method on the SearchState to update the list of events. If no events are found, it calls setFailView() to display an error message. SearchState:
This is the class that holds the current state of the search results, including the list of events and any associated error messages. The state has a results list, which is supposed to contain the events retrieved from the search. The state also holds an error message, which is displayed when there are no matching events.
SearchViewModel: This model binds the state of the search functionality to the UI. It provides methods to access the current search results or error message and is responsible for updating the view. The getResults() method returns the list of events (or an empty list if no results are found). StubViewManagerModel:
This is a mock model used in the tests to simulate the behavior of the view manager. It tracks whether property changes (like updating the search results or error message) are being notified to the view.
The Use Case Flow:
User Initiates a Search: The user enters a search query (e.g., a tag or keyword) in the search bar. The system processes the query and checks the database or event repository for matching events. SearchPresenter Logic:
The SearchPresenter receives the search query and processes it to find matching events. It calls a method like setResults() on the SearchState to update the state with the list of matching events. If no events are found, the SearchPresenter calls setFailView() with an appropriate error message (e.g., "No matching events found").
Updating the SearchState: The SearchState class stores the results of the search in its results field. If there are no events, it also stores the error message. The setResults() method has been updated to ensure that if the list of results is null, it defaults to an empty list (Collections.emptyList()). This prevents NullPointerExceptions when trying to access the list in the UI layer.
ViewModel and View Update: The SearchViewModel updates the UI with the new state (either the list of matching events or the error message). The view is notified that the search results or the error message have changed, and it updates the UI accordingly. Error Handling:
If no matching events are found, the error message is displayed, and the list of results is empty. The UI shows a message like "No matching events found" instead of a null result or a broken interface.