A specialized Streamlit application for managing, building, and auditing event validation schemas on Google Cloud Storage. This UI acts as the management layer for the Events Validator core.

• Single Source of Truth: Define parameters (keys, types, descriptions) once and reuse them across multiple event schemas.
• Transactional Updates: Editing a parameter in the repository allows you to propagate changes to all associated schemas in GCP Storage automatically.
• Impact Analysis: View a side-by-side diff of how changes will affect deployed schemas before committing.

• Cloud Storage Browser: Directly view and manage JSON schemas stored in your GCP bucket.
• Health Checks: Automatically detects when deployed schemas fall out of sync with the Parameter Repository.
• One-Click Repair: Instantly update outdated schemas to match the latest repository definitions.

• Visual Editor: Design complex JSON schemas without writing code.
• Type Safety: Built-in support for Strings, Numbers, Booleans, Arrays, and Objects.
• Nested Structures: Create complex array schemas with nested object definitions easily.

• uv (Astral's fast Python package manager)
• Google Cloud SDK (authenticated)

1. Authenticate:

   gcloud auth application-default login

2. Environment Configuration: Copy .env.example to .env and fill in your GCP details:

   cp .env.example .env

3. Install Dependencies:

   uv sync

4. Run Application:

   uv run streamlit run app/app.py

The application is containerized and optimized for Cloud Run.

docker build -t event-validator-ui .

docker run -p 8080:8080 \
  -v $HOME/.config/gcloud:/root/.config/gcloud \
  -e BUCKET_NAME="your-bucket" \
  -e GCP_PROJECT="your-project" \
  event-validator-ui

The Terraform configuration supports two deployment modes for securing the application with Identity-Aware Proxy (IAP):

• Cost: Low/Free (No dedicated Load Balancer).
• Architecture: Uses Cloud Run's native IAP integration (Preview).
• Pros: Significant cost savings (~$18/mo saved), simpler infrastructure.
• Cons: Experimental feature (Preview)
• Configuration: use_classic_load_balancer = false in terraform.tfvars.

• Cost: ~$18/month + traffic.
• Architecture: Full HTTPS Global Load Balancer + Serverless NEG.
• Pros: Production-grade GA feature, full visibility in Cloud Console, supports custom domains easily.
• Cons: Expensive for small internal tools.
• Configuration: use_classic_load_balancer = true in terraform.tfvars.

This component is part of the Events Validator project and is licensed under the GNU General Public License (GPL).