initial: novel-app snapshot

app.py

@@ -0,0 +1,84 @@
+"""Flask backend for novel-writer.
+
+Application factory only — routes live in routes/, business logic in
+services/, queries in repositories/. See config.py for env overrides.
+"""
+
+import logging
+import os
+import uuid
+
+from flask import Flask, g, has_request_context, request
+
+import config
+import security
+from extensions import close_db
+from routes import api_bp, pages_bp
+
+
+class _RequestIdFilter(logging.Filter):
+    """Inject `request_id` into every LogRecord so the formatter can print it.
+
+    Reads Flask `g.request_id` when a request context is active; falls back
+    to "-" for log lines emitted outside a request (startup, daemon threads).
+    """
+
+    def filter(self, record):
+        if has_request_context():
+            record.request_id = getattr(g, "request_id", "-")
+        else:
+            record.request_id = "-"
+        return True
+
+
+_LOG_FORMAT = "%(asctime)s [%(process)d] [%(request_id)s] %(levelname)s: %(message)s"
+
+_handler = logging.StreamHandler()
+_handler.setFormatter(logging.Formatter(_LOG_FORMAT))
+_handler.addFilter(_RequestIdFilter())
+
+_root = logging.getLogger()
+_root.setLevel(logging.INFO)
+if not any(isinstance(h, logging.StreamHandler) and h.formatter for h in _root.handlers):
+    _root.addHandler(_handler)
+
+logger = logging.getLogger(__name__)
+
+
+def create_app():
+    app = Flask(
+        __name__,
+        template_folder=os.path.join(config.BASE_DIR, "templates"),
+        static_folder=os.path.join(config.BASE_DIR, "static"),
+    )
+    app.secret_key = config.SECRET_KEY
+
+    @app.before_request
+    def _assign_request_id():
+        g.request_id = uuid.uuid4().hex[:8]
+
+    @app.after_request
+    def _log_request(response):
+        logger.info(
+            "%s %s -> %s (%s)",
+            request.method,
+            request.path,
+            response.status_code,
+            g.request_id,
+        )
+        return response
+
+    app.teardown_appcontext(close_db)
+    security.init_app(app)
+
+    app.register_blueprint(api_bp)
+    app.register_blueprint(pages_bp)
+
+    return app
+
+
+app = create_app()
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=config.PORT, debug=False)