The Provider class encapsulates all configuration for a single social media platform: URL templates, regex patterns for link/username extraction, keyword-based existence checks, and request parameters. It builds regex patterns from URL templates with proper escaping, supports interpolation of the username placeholder into URLs and payloads, and provides methods for extracting links and usernames from HTML. This is a self-contained, reusable component that could be extracted into a library for any project needing to manage multiple URL-based service configurations.

ScannerManager implements a multi-threaded scan orchestration using a queue and worker threads. It handles graceful shutdown via an exit event, ensures thread-safe updates to shared state with a lock, and dynamically enqueues new tasks when linked accounts are discovered. The pattern is clean and reusable for any batch processing task that requires concurrent execution with dynamic task generation.

Neo4jVisualizer transforms scan results into a Neo4j-compatible JSON format with nodes (User, SocialMediaAccount, Email) and relationships (HAS_ACCOUNT, HAS_EMAIL, CONNECTED_TO). It handles deduplication of nodes, converts sets to lists for JSON serialization, and dynamically extracts usernames from profile URLs using the Provider class. This component is a clean example of exporting relational data to a graph database and could be adapted for other graph export scenarios.