release nouri 0.6.0 polish backup and pwa

nouri/__init__.py

@@ -5,7 +5,7 @@ import secrets
 from datetime import date, timedelta
 from pathlib import Path
 
-from flask import Flask, g, send_from_directory
+from flask import Flask, flash, g, redirect, request, send_from_directory, url_for
 
 from . import db
 from .admin import admin_bp
@@ -24,6 +24,7 @@ from .constants import (
     VISIBILITY_LABELS,
     WEEKDAY_OPTIONS,
 )
+from .images import ensure_upload_structure, image_sizes, image_srcset, image_url
 from .main import main_bp
 
 
@@ -56,7 +57,7 @@ def create_app() -> Flask:
     db_path = data_dir / "nouri.sqlite3"
 
     data_dir.mkdir(parents=True, exist_ok=True)
-    upload_dir.mkdir(parents=True, exist_ok=True)
+    ensure_upload_structure(upload_dir)
 
     app = Flask(__name__, instance_relative_config=False)
     app.config.update(
@@ -68,7 +69,7 @@ def create_app() -> Flask:
         PERMANENT_SESSION_LIFETIME=timedelta(days=30),
         SESSION_COOKIE_HTTPONLY=True,
         SESSION_COOKIE_SAMESITE="Lax",
-        APP_VERSION="0.5.1",
+        APP_VERSION="0.6.0",
         VAPID_PUBLIC_KEY=os.environ.get("NOURI_VAPID_PUBLIC_KEY", ""),
         VAPID_PRIVATE_KEY=os.environ.get("NOURI_VAPID_PRIVATE_KEY", ""),
         VAPID_SUBJECT=os.environ.get("NOURI_VAPID_SUBJECT", "mailto:mail@hnz.io"),
@@ -83,6 +84,11 @@ def create_app() -> Flask:
 
     @app.context_processor
     def inject_globals() -> dict[str, object]:
+        def asset_url(filename: str) -> str:
+            file_path = root_dir / "nouri" / "static" / filename
+            version = int(file_path.stat().st_mtime) if file_path.exists() else app.config["APP_VERSION"]
+            return url_for("static", filename=filename, v=version)
+
         return {
             "item_kind_labels": ITEM_KIND_LABELS,
             "item_kind_singular_labels": ITEM_KIND_SINGULAR_LABELS,
@@ -103,18 +109,61 @@ def create_app() -> Flask:
             "weekday_name": lambda value: WEEKDAY_NAMES[value.weekday()],
             "weekday_short_name": lambda value: WEEKDAY_SHORT_NAMES[value.weekday()],
             "is_admin": lambda: bool(getattr(g, "user", None)) and g.user["role"] == "admin",
+            "asset_url": asset_url,
+            "image_url": lambda filename, variant="md": image_url(
+                filename,
+                url_for,
+                variant,
+                upload_folder=app.config["UPLOAD_FOLDER"],
+            ),
+            "image_srcset": lambda filename: image_srcset(
+                filename,
+                url_for,
+                upload_folder=app.config["UPLOAD_FOLDER"],
+            ),
+            "image_sizes": image_sizes,
         }
 
     @app.get("/uploads/<path:filename>")
     def uploaded_file(filename: str):
-        return send_from_directory(app.config["UPLOAD_FOLDER"], filename)
+        response = send_from_directory(app.config["UPLOAD_FOLDER"], filename, max_age=60 * 60 * 24 * 30)
+        response.headers["Cache-Control"] = "public, max-age=2592000, immutable"
+        return response
 
     @app.get("/app.webmanifest")
     def webmanifest():
-        return send_from_directory(root_dir / "nouri" / "static" / "pwa", "app.webmanifest", mimetype="application/manifest+json")
+        response = send_from_directory(
+            root_dir / "nouri" / "static" / "pwa",
+            "app.webmanifest",
+            mimetype="application/manifest+json",
+            max_age=60 * 30,
+        )
+        response.headers["Cache-Control"] = "public, max-age=1800"
+        return response
 
     @app.get("/service-worker.js")
     def service_worker():
-        return send_from_directory(root_dir / "nouri" / "static" / "pwa", "service-worker.js", mimetype="application/javascript")
+        response = send_from_directory(
+            root_dir / "nouri" / "static" / "pwa",
+            "service-worker.js",
+            mimetype="application/javascript",
+            max_age=0,
+        )
+        response.headers["Cache-Control"] = "no-store"
+        return response
+
+    @app.after_request
+    def apply_cache_policy(response):
+        if response.direct_passthrough:
+            return response
+        content_type = response.headers.get("Content-Type", "")
+        if content_type.startswith("text/html"):
+            response.headers.setdefault("Cache-Control", "no-store, max-age=0")
+        return response
+
+    @app.errorhandler(413)
+    def upload_too_large(_error):
+        flash("Das hochgeladene Bild ist etwas zu groß. Eine kleinere Datei passt hier besser.", "error")
+        return redirect(request.referrer or url_for("main.dashboard"))
 
     return app