Verticals Images Generation - AI

[scezen]

Issue Reference

This PR addresses issue #304.

Objective

1. Modification of existing services to use Spring AI instead of Langchain.
2. Create and implement an image generation service using Spring AI.

Summary of Changes

• AiService: Updated service and related files to use Spring AI instead of Langchain.
• ImageGenerationService: Service to generate images using the OpenAI API and save them to a specified folder.
• Configuration Files: Configuration for the image generation service in application.yml.
• UI Config: Updated to include the destination folder for generated images and the image generation configuration.
• App Config: Added bean ImageGenerationService and modified VerticalsConfigService bean.
• VerticalsConfigService: Updated to include the image generation functionality, loading configurations from both classpath and folders, and generating images for each vertical.
• Resource Controller: Implemented an endpoint to serve the generated images for each vertical.
• Admin Controller: Added an endpoint to regenerate images for specific verticals.
• Frontend (index.html): Integrated the generated images into the frontend, providing a way to change images via an admin button.

Detailed Changes

1. ImageGenerationService.java:

   • Implements methods to generate images using the OpenAI API and save them locally.
   • Contains utility functions to check if an image should be generated, generate prompts, and manage the images folder.

2. ImageGenerationConfig.java:

   • Configuration class to hold properties like prompt template and force override flag.

3. application.yml:

   • Added configuration for imageGenerationConfig with prompt template and forceOverride flag.

4. UiConfig.java:

   • Added properties for generated images folder and image generation configuration.

5. AppConfig.java:

   • Defined beans for ImageGenerationService and modified existing beans to integrate image generation capabilities.

6. VerticalsConfigService.java:

   • Modified to load vertical configurations and initiate image generation tasks for each vertical.
   • Multi-threading using ExecutorService to manage background image generation.
   • Added methods to map configurations, handle URLs, and manage the lifecycle of the image generation process.

7. ResourceController.java:

   • Added endpoint to serve images for specific verticals.

8. AdminController.java:

   • Added endpoint to allow administrators to manually regenerate images for verticals if needed.

9. index.html:

   • Integrated generated images into the vertical cards and added a button to manually regenerate images (admin control needed).

Additional Notes

• The image generation prompt in the configuration ensures a consistent style for all generated images.
• The system checks if an image already exists to avoid unnecessary regenerations unless forceOverride is enabled.

[GoulvenF]

Thanks @scezen for this great PR ! After reviewing, code and documentation is excellent. I merge, we'll have it on nudger.fr next week.