Initial commit

app/main.py

@@ -0,0 +1,95 @@
+"""FastAPI application factory."""
+
+from __future__ import annotations
+
+from contextlib import asynccontextmanager
+
+import sentry_sdk
+from fastapi import FastAPI, Request
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
+from slowapi import Limiter, _rate_limit_exceeded_handler
+from slowapi.errors import RateLimitExceeded
+from slowapi.util import get_remote_address
+
+from app.api.v1.router import api_router
+from app.core.config import get_settings
+from app.core.exceptions import AppException
+from app.core.logging import get_logger, setup_logging
+
+logger = get_logger(__name__)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """Startup / shutdown events."""
+    setup_logging()
+    settings = get_settings()
+
+    # Sentry
+    if settings.SENTRY_DSN:
+        sentry_sdk.init(
+            dsn=settings.SENTRY_DSN,
+            traces_sample_rate=0.1,
+            environment=settings.APP_ENV,
+        )
+
+    logger.info(
+        "application_started",
+        app_name=settings.APP_NAME,
+        env=settings.APP_ENV,
+    )
+    yield
+    logger.info("application_shutdown")
+
+
+def create_app() -> FastAPI:
+    settings = get_settings()
+
+    app = FastAPI(
+        title=f"{settings.APP_NAME} API",
+        description="Marketplace API for Deals24Togo — listings, agencies, categories, and more.",
+        version="1.0.0",
+        docs_url="/docs" if settings.DEBUG else None,
+        redoc_url="/redoc" if settings.DEBUG else None,
+        lifespan=lifespan,
+    )
+
+    # ── CORS ──
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=settings.allowed_origins_list,
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+    # ── Rate limiter ──
+    limiter = Limiter(key_func=get_remote_address)
+    app.state.limiter = limiter
+    app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)
+
+    # ── Exception handlers ──
+    @app.exception_handler(AppException)
+    async def app_exception_handler(_request: Request, exc: AppException):
+        return JSONResponse(
+            status_code=exc.status_code,
+            content={"detail": exc.detail},
+        )
+
+    @app.exception_handler(Exception)
+    async def global_exception_handler(_request: Request, exc: Exception):
+        logger.error("unhandled_exception", error=str(exc), exc_info=True)
+        return JSONResponse(
+            status_code=500,
+            content={"detail": "Internal server error"},
+        )
+
+    # ── Routes ──
+    app.include_router(api_router)
+
+    @app.get("/health", tags=["Health"])
+    def health_check():
+        return {"status": "healthy", "app": settings.APP_NAME, "env": settings.APP_ENV}
+
+    return app