Singleton Design Pattern

The singleton design pattern was used for our incident log. It is a centralized tracking of all incidents to ensure accountability and maintain consistency and guarantees a single instance for incident logging.

Figure 6: Simpleton Design Pattern in IncidentLog

Adapter Design Pattern

Used in CardAdapter, it acts as a bridge to seamlessly integrate Firebase data with Android's RecyclerView, overcoming compatibility issues.

Figure 7: Adapter Design Pattern in CardAdapter

The CardAdapter adapts firebase data into a structure suitable for display in the UI, ensuring smooth functionality and responsiveness. This pattern enhances modularity, allowing the same adapter logic to be reused for different data sources, while also maintaining flexibility and clean code by decoupling Firebase logic from the UI

Template Design Pattern

In this project, the Template Design Pattern is used in UserInputAbstract, LogInUserInput, and SignUpUserInput to standardize user input validation for login and sign-up processes. The UserInputAbstract class provides a common template with pre-defined steps for validating inputs like email and password, while LogInUserInput and SignUpUserInput override specific methods to handle the unique validation logic for each case. This ensures that the validation process remains consistent, reusable, and easy to maintain across different user input scenarios.

Figure 8: Template Design Pattern in UserInputAbstract

Figure 9: Template Design Pattern in LogInUserInput

Google Firebase - Realtime Database

Realtime Database provides a flexible and scalable data storage solution for AIYA app to build real-time applications that allows for collaboration and synchronisation between multiple users and devices.
‍
This meant that Aiya can store data like accounts, incident tags and logs in JSON format and allows for any changes made to be immediately propagated to all clients that are granted access.

Google Firebase - Storage

Storage provides a secure and scalable solution for storing and serving user-generated content with features such as access control and secure downloads.

This allows for AIYA! app to store and serve images, and can easily upload and download files directly from devices without the need for any server-side code.

This is vital as AIYA! is a community-centric app where all of the content is user-generated; all of the hazard descriptions and photos are uploaded by users.

Google Firebase - Authentication

Authentication provides AIYA! with a secure way to register and authenticate user accounts based on a variety of methods.

We have selected to go with email verification. This allows registered users to be logged in to their saved accounts without having to sign up every time they choose to log in.

Google API - Maps and Places

Google Maps API enables the integration of various Google Map features such as maps, direction, and geolocation services into the AIYA! app. This allowed AIYA! app to create customised visual markers that are location-aware on the Singapore city map.
‍
On the other hand, Places API allows us to be able to allow user to key in location details  and we are then able to check and map the location that the user key in, into the google maps instead of the user keying random and perhaps non-existent locations.