Tusho

Architecture

C++ crawler

The crawler is intentionally split into small classes:

• CrawlerApplication coordinates a run.
• StructuredLogger writes structured logs.
• SqliteDatabaseConnection owns the SQLite connection lifetime.
• FileSystemCatalogRepository owns schema creation and row persistence.
• FileSystemCrawler performs the recursive file system walk.

PHP web application

The PHP side is also kept small:

• ApplicationConfigurationLoader validates XML configuration.
• FileSystemCatalogRepository performs read-only queries through PDO SQLite.
• FrontController routes web requests.
• HtmlDocumentRenderer creates HTML responses.
• XmlDocumentRenderer creates XML responses.
• WebRequestLogger records request logs.

Why this split matters

This structure keeps each class focused on one main job, which makes the code easier to test, document, and change safely.

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