Quizial

Spring CRUD Application - Create online quizzes, share them with your friends and discover your identity through engaging personality quizzes from other users

Features

• CRUD application that allows you to generate online tests, share them and take quizzes created by other people to get a result based on your answers.

• Initial login and registration page.

  • Non-registered users can only access and take quizzes that have already been created, but cannot create new quizzes.
  • To verify the registration, a confirmation email will be sent to the email address provided during the signup process.
  • Password recovery functionality by sending a reset link to the email with which the account was created.
  • Functionality to remember credentials in order to keep the session open.
• Dashboard with the quizzes available in the application with the possibility to see the most popular, the newest or those created by friends. Customised searches can also be performed.
• Ability to take quizzes, with the option to reset progress, add to favourites or share on social networks.
• Personal user page that displays your created quizzes, those you have added to favourites and other users you have added as friends.

• Ability to create or edit existing quizzes, specifying up to 4 possible outcomes and up to 10 questions per quiz, with up to 4 answers each.

  • The test can have a header image, which will be uploaded to the server.
  • Each question and answer can have an illustrative image, which can be specified by URL or picked up from a GIPHY search thanks to an internal integration.

Technical aspects

Frontend

• Use of UIKit to implement a front-end library other than the classic Bootstrap.
• Use of PrettyTime as an OpenSource time formatting library.
• Use of Thymeleaf as a templating language as it has excellent integration with Spring.

Backend

• Use of JPA Criteria Queries for database queries, extending CrudRepository and creating own implementations for custom methods with Spring Data JPA.
• JPA MetaModel Generation with Hibernate.
• DTO to Entity Mapping via MapStruct.
• Automatic column audition: CreatedAt, UpdatedAt and user modifications are saved automatically.
• Automatic entity audition: @PrePersist, @PreUpdate, @PreRemove to control the creation, modification and deletion of entities.
• Customised implementation of permission verification through a custom security expression with Spring Security.
• Integration with GIPHY to search for GIFs from within the application through its search endpoint.
• Data mapping in the GIPHY integration via Jackson.
• Custom implementation to preserve transient fields for preupdate (through @Postmerge).
• Use of @SecondaryTable on view to calculate total sum of favourites.
• Exclusion of tables from hibernate autogeneration (used for the views).
• Application logging using Spring AOP (Aspect-Oriented Programming).
• Use of Lombok to prevent repetitive code generation.

Future improvements

The project can be improved on several points:

• Add complex search filters.
• Allow editing of user data in the profile.
• Add an administration console and the ability to report quizzes and users.