rozbicie na moduły, poprawki i komendy cli

Dockerfile

@@ -1 +0,0 @@
-deploy/app/Dockerfile

Dockerfile

@@ -0,0 +1,18 @@
+#FROM python:3.13-slim
+FROM python:3.14-slim
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    && apt-get install -y build-essential \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt requirements.txt
+
+RUN pip install --upgrade pip
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+RUN mkdir -p /app/instance
+
+CMD ["python", "run_waitress.py"]

config.py

@@ -11,6 +11,13 @@ def _get_bool(name: str, default: bool) -> bool:
 def _get_str(name: str, default: str) -> str:
     return os.environ.get(name, default)
 
+
+def _get_int(name: str, default: int) -> int:
+    try:
+        return int(os.environ.get(name, default))
+    except (TypeError, ValueError):
+        return default
+
 class Config:
     """
     Konfiguracja aplikacji pobierana z ENV (z sensownymi domyślnymi wartościami).
@@ -50,6 +57,12 @@ class Config:
     # (opcjonalnie) wyłącz warningi track_modifications
     SQLALCHEMY_TRACK_MODIFICATIONS = False
 
+    SQLALCHEMY_ENGINE_OPTIONS = {
+        "pool_pre_ping": True,
+        "pool_recycle": _get_int("DB_POOL_RECYCLE", 300),
+        "pool_timeout": _get_int("DB_POOL_TIMEOUT", 30),
+    }
+
     HEALTHCHECK_TOKEN = _get_str("HEALTHCHECK_TOKEN", "healthcheck")
 
     # Baza danych
@@ -62,10 +75,17 @@ class Config:
             f"postgresql://{os.environ['DB_USER']}:{os.environ['DB_PASSWORD']}@"
             f"{os.environ['DB_HOST']}:{os.environ.get('DB_PORT', 5432)}/{os.environ['DB_NAME']}"
         )
+        SQLALCHEMY_ENGINE_OPTIONS["connect_args"] = {
+            "connect_timeout": _get_int("DB_CONNECT_TIMEOUT", 5),
+            "application_name": _get_str("DB_APPLICATION_NAME", "zbiorka-app"),
+        }
     elif DB_ENGINE == "mysql":
         SQLALCHEMY_DATABASE_URI = (
             f"mysql+pymysql://{os.environ['DB_USER']}:{os.environ['DB_PASSWORD']}@"
             f"{os.environ['DB_HOST']}:{os.environ.get('DB_PORT', 3306)}/{os.environ['DB_NAME']}"
         )
+        SQLALCHEMY_ENGINE_OPTIONS["connect_args"] = {
+            "connect_timeout": _get_int("DB_CONNECT_TIMEOUT", 5),
+        }
     else:
         raise ValueError("Nieobsługiwany typ bazy danych.")

run_waitress.py

@@ -1,11 +1,10 @@
 import os
-from app import app, db, create_admin_account
+
 from waitress import serve
 
-if __name__ == '__main__':
-    with app.app_context():
-        db.create_all()
-        create_admin_account()
+from app import app, init_database_with_retry
 
+if __name__ == '__main__':
+    init_database_with_retry(app, raise_on_failure=False)
     port = int(os.environ.get("APP_PORT", 8080))
     serve(app, host="0.0.0.0", port=port)

zbiorka_app/__init__.py

@@ -0,0 +1,43 @@
+from flask import Flask
+
+from config import Config
+
+from .cli import register_cli_commands
+from .errors import register_error_handlers
+from .extensions import db, login_manager
+from .routes import register_routes
+from .utils import asset_url, init_version, init_database_with_retry
+
+
+def create_app():
+    app = Flask(
+        __name__,
+        template_folder="templates",
+        static_folder="static",
+        static_url_path="/static",
+    )
+
+    app.config.from_object(Config)
+
+    db.init_app(app)
+    login_manager.init_app(app)
+    login_manager.login_view = "zaloguj"
+
+    init_version(app)
+
+    @app.context_processor
+    def inject_asset_helpers():
+        return {"asset_url": asset_url}
+
+    @app.before_request
+    def ensure_db_ready_before_request():
+        if app.extensions.get("database_ready") is True:
+            return None
+        init_database_with_retry(app, max_attempts=1, delay=0, raise_on_failure=False)
+        return None
+
+    register_routes(app)
+    register_error_handlers(app)
+    register_cli_commands(app)
+
+    return app

zbiorka_app/cli.py

@@ -0,0 +1,79 @@
+import click
+from flask.cli import with_appcontext
+
+from .extensions import db
+from .utils import (
+    ensure_database_ready,
+    init_database_with_retry,
+    safe_db_rollback,
+    set_login_hosts,
+    set_user_password,
+)
+
+
+def register_cli_commands(app):
+    @app.cli.command("init-db")
+    @click.option("--attempts", default=20, type=int, show_default=True)
+    @click.option("--delay", default=3, type=int, show_default=True)
+    def init_db_command(attempts: int, delay: int):
+        """Inicjalizuje baze i czeka az bedzie gotowa."""
+        ok = init_database_with_retry(app, max_attempts=attempts, delay=delay, raise_on_failure=False)
+        if not ok:
+            raise click.ClickException("Nie udalo sie zainicjalizowac bazy danych.")
+        click.echo("Baza danych gotowa.")
+
+    @app.cli.command("set-admin-password")
+    @click.option("--username", default="admin", show_default=True)
+    @click.option("--password", prompt=True, hide_input=True, confirmation_prompt=True)
+    @with_appcontext
+    def set_admin_password_command(username: str, password: str):
+        """Ustawia haslo administratora."""
+        try:
+            ensure_database_ready(create_schema=True, create_admin=True)
+            user = set_user_password(username=username, password=password, is_admin=True)
+            click.echo(f"Haslo admina ustawione dla uzytkownika: {user.uzytkownik}")
+        except Exception as exc:
+            safe_db_rollback()
+            raise click.ClickException(str(exc))
+
+    @app.cli.command("set-user-password")
+    @click.argument("username")
+    @click.option("--password", prompt=True, hide_input=True, confirmation_prompt=True)
+    @click.option("--admin/--no-admin", default=None)
+    @with_appcontext
+    def set_user_password_command(username: str, password: str, admin: bool | None):
+        """Tworzy uzytkownika lub zmienia jego haslo."""
+        try:
+            ensure_database_ready(create_schema=True, create_admin=True)
+            user = set_user_password(username=username, password=password, is_admin=admin)
+            click.echo(f"Haslo ustawione dla uzytkownika: {user.uzytkownik}")
+        except Exception as exc:
+            safe_db_rollback()
+            raise click.ClickException(str(exc))
+
+    @app.cli.command("set-login-hosts")
+    @click.argument("hosts", required=False, default="")
+    @with_appcontext
+    def set_login_hosts_command(hosts: str):
+        """Ustawia dozwolone hosty lub IP do logowania."""
+        try:
+            ensure_database_ready(create_schema=True, create_admin=True)
+            settings = set_login_hosts(hosts)
+            click.echo(
+                "Dozwolone hosty logowania ustawione na: "
+                f"{settings.dozwolone_hosty_logowania or '(brak - logowanie zablokowane)'}"
+            )
+        except Exception as exc:
+            safe_db_rollback()
+            raise click.ClickException(str(exc))
+
+    @app.cli.command("db-ping")
+    @with_appcontext
+    def db_ping_command():
+        """Sprawdza polaczenie z baza danych."""
+        try:
+            ensure_database_ready(create_schema=False, create_admin=False)
+            click.echo("OK")
+        except Exception as exc:
+            safe_db_rollback()
+            raise click.ClickException(f"DB ERROR: {exc}")

zbiorka_app/errors.py

@@ -0,0 +1,102 @@
+from html import escape
+from http import HTTPStatus
+
+from flask import jsonify, render_template, request
+from jinja2 import TemplateNotFound
+from sqlalchemy.exc import OperationalError
+from werkzeug.exceptions import HTTPException
+
+from .utils import safe_db_rollback
+
+
+JSON_MIMETYPES = ["application/json", "text/html"]
+
+
+def _wants_json_response() -> bool:
+    if request.path.startswith("/api/"):
+        return True
+
+    if request.is_json:
+        return True
+
+    best = request.accept_mimetypes.best_match(JSON_MIMETYPES)
+    if not best:
+        return False
+
+    return (
+        best == "application/json"
+        and request.accept_mimetypes["application/json"]
+        >= request.accept_mimetypes["text/html"]
+    )
+
+
+def _status_phrase(status_code: int) -> str:
+    try:
+        return HTTPStatus(status_code).phrase
+    except ValueError:
+        return "Blad"
+
+
+def _status_description(status_code: int) -> str:
+    try:
+        return HTTPStatus(status_code).description
+    except ValueError:
+        return "Wystapil blad podczas przetwarzania zadania."
+
+
+def _plain_fallback(status_code: int, phrase: str, description: str):
+    html = f"""<!doctype html>
+<html lang=\"pl\">
+<head>
+  <meta charset=\"utf-8\">
+  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">
+  <title>{status_code} {escape(phrase)}</title>
+</head>
+<body>
+  <h1>{status_code} - {escape(phrase)}</h1>
+  <p>{escape(description)}</p>
+</body>
+</html>"""
+    return html, status_code
+
+
+def _render_error(status_code: int, message: str | None = None):
+    phrase = _status_phrase(status_code)
+    description = message or _status_description(status_code)
+    payload = {"status": status_code, "error": phrase, "message": description}
+
+    if _wants_json_response():
+        return jsonify(payload), status_code
+
+    try:
+        return (
+            render_template(
+                "error.html",
+                error_code=status_code,
+                error_name=phrase,
+                error_message=description,
+            ),
+            status_code,
+        )
+    except TemplateNotFound:
+        return _plain_fallback(status_code, phrase, description)
+    except Exception:
+        return _plain_fallback(status_code, phrase, description)
+
+
+def register_error_handlers(app):
+    @app.errorhandler(HTTPException)
+    def handle_http_exception(exc):
+        return _render_error(exc.code or 500, exc.description)
+
+    @app.errorhandler(OperationalError)
+    def handle_operational_error(exc):
+        safe_db_rollback()
+        app.logger.exception("Blad polaczenia z baza danych: %s", exc)
+        return _render_error(503, "Baza danych jest chwilowo niedostepna. Sprobuj ponownie za chwile.")
+
+    @app.errorhandler(Exception)
+    def handle_unexpected_error(exc):
+        safe_db_rollback()
+        app.logger.exception("Nieobsluzony wyjatek: %s", exc)
+        return _render_error(500, "Wystapil nieoczekiwany blad serwera.")

zbiorka_app/extensions.py

@@ -0,0 +1,5 @@
+from flask_login import LoginManager
+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()
+login_manager = LoginManager()

zbiorka_app/models.py

@@ -0,0 +1,146 @@
+from datetime import datetime
+
+from flask_login import UserMixin
+from sqlalchemy import Numeric
+from werkzeug.security import check_password_hash, generate_password_hash
+
+from .extensions import db
+
+class Uzytkownik(UserMixin, db.Model):
+    __tablename__ = "uzytkownik"
+
+    id = db.Column(db.Integer, primary_key=True)
+    uzytkownik = db.Column(db.String(80), unique=True, nullable=False)
+    haslo_hash = db.Column(db.String(128), nullable=False)
+    czy_admin = db.Column(db.Boolean, default=False)
+
+    def set_password(self, password):
+        self.haslo_hash = generate_password_hash(password)
+    def check_password(self, password):
+        return check_password_hash(self.haslo_hash, password)
+
+class Zbiorka(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    nazwa = db.Column(db.String(100), nullable=False)
+    opis = db.Column(db.Text, nullable=False)
+    numer_konta = db.Column(db.String(50), nullable=True) 
+    numer_telefonu_blik = db.Column(db.String(50), nullable=True)
+    cel = db.Column(Numeric(12, 2), nullable=False, default=0)
+    stan = db.Column(Numeric(12, 2), default=0)
+    ukryta = db.Column(db.Boolean, default=False)
+    ukryj_kwote = db.Column(db.Boolean, default=False)
+    zrealizowana = db.Column(db.Boolean, default=False)
+    pokaz_postep_finanse = db.Column(db.Boolean, default=True, nullable=False)
+    pokaz_postep_pozycje = db.Column(db.Boolean, default=True, nullable=False)
+    pokaz_postep_kwotowo = db.Column(db.Boolean, default=True, nullable=False)
+    uzyj_konta = db.Column(db.Boolean, default=True, nullable=False)
+    uzyj_blik = db.Column(db.Boolean, default=True, nullable=False)
+    typ_zbiorki = db.Column(db.String(20), default="standardowa", nullable=False)
+
+    wplaty = db.relationship(
+        "Wplata",
+        back_populates="zbiorka",
+        lazy=True,
+        order_by="Wplata.data.desc()",
+        cascade="all, delete-orphan",
+        passive_deletes=True,
+    )
+
+    wydatki = db.relationship(
+        "Wydatek",
+        backref="zbiorka",
+        lazy=True,
+        order_by="Wydatek.data.desc()",
+        cascade="all, delete-orphan",
+        passive_deletes=True,
+    )
+
+    przedmioty = db.relationship(
+        "Przedmiot",
+        backref="zbiorka",
+        lazy=True,
+        order_by="Przedmiot.id.asc()",
+        cascade="all, delete-orphan",
+        passive_deletes=True,
+    )
+
+class Przedmiot(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    zbiorka_id = db.Column(
+        db.Integer,
+        db.ForeignKey("zbiorka.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    nazwa = db.Column(db.String(120), nullable=False)
+    link = db.Column(db.String(255), nullable=True)
+    cena = db.Column(Numeric(12, 2), nullable=True)
+    kupione = db.Column(db.Boolean, default=False)
+
+class Wplata(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    zbiorka_id = db.Column(
+        db.Integer,
+        db.ForeignKey("zbiorka.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    kwota = db.Column(Numeric(12, 2), nullable=False)
+    data = db.Column(db.DateTime, default=datetime.utcnow)
+    opis = db.Column(db.Text, nullable=True)
+    zbiorka = db.relationship("Zbiorka", back_populates="wplaty")
+    ukryta = db.Column(db.Boolean, nullable=False, default=False)
+
+class Wydatek(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    zbiorka_id = db.Column(
+        db.Integer,
+        db.ForeignKey("zbiorka.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    kwota = db.Column(Numeric(12, 2), nullable=False)
+    data = db.Column(db.DateTime, default=datetime.utcnow)
+    opis = db.Column(db.Text, nullable=True)
+    ukryta = db.Column(db.Boolean, nullable=False, default=False)
+
+class Przesuniecie(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    zbiorka_zrodlo_id = db.Column(
+        db.Integer,
+        db.ForeignKey("zbiorka.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    zbiorka_cel_id = db.Column(
+        db.Integer,
+        db.ForeignKey("zbiorka.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    kwota = db.Column(Numeric(12, 2), nullable=False)
+    data = db.Column(db.DateTime, default=datetime.utcnow)
+    opis = db.Column(db.Text, nullable=True)
+    ukryta = db.Column(db.Boolean, nullable=False, default=False)
+    
+    wplata_id = db.Column(
+        db.Integer,
+        db.ForeignKey("wplata.id", ondelete="SET NULL"),
+        nullable=True,
+    )
+    
+    zbiorka_zrodlo = db.relationship("Zbiorka", foreign_keys=[zbiorka_zrodlo_id], backref="przesuniecia_wychodzace")
+    zbiorka_cel = db.relationship("Zbiorka", foreign_keys=[zbiorka_cel_id], backref="przesuniecia_przychodzace")
+    wplata = db.relationship("Wplata", foreign_keys=[wplata_id], backref="przesuniecia")
+
+class UstawieniaGlobalne(db.Model):
+    __tablename__ = "ustawienia_globalne"
+
+    id = db.Column(db.Integer, primary_key=True)
+    numer_konta = db.Column(db.String(50), nullable=False)
+    numer_telefonu_blik = db.Column(db.String(50), nullable=False)
+    dozwolone_hosty_logowania = db.Column(db.Text, nullable=True)
+    logo_url = db.Column(db.String(255), nullable=True)
+    tytul_strony = db.Column(db.String(120), nullable=True)
+    pokaz_logo_w_navbar = db.Column(db.Boolean, default=False)
+    typ_navbar = db.Column(db.String(10), default="text")
+    typ_stopka = db.Column(db.String(10), default="text")
+    stopka_text = db.Column(db.String(200), nullable=True)
+    kolejnosc_rezerwowych = db.Column(db.String(20), default="id", nullable=False) 
+
+

zbiorka_app/templates/admin/dodaj_wplate.html

@@ -100,5 +100,5 @@
 {% endblock %}
 {% block extra_scripts %}
 {{ super() }}
-<script src="{{ url_for('static', filename='js/dodaj_wplate.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/dodaj_wplate.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/admin/dodaj_wydatek.html

@@ -75,5 +75,5 @@
 
 {% block extra_scripts %}
 {{ super() }}
-<script src="{{ url_for('static', filename='js/dodaj_wydatek.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/dodaj_wydatek.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/admin/edytuj_stan.html

@@ -137,5 +137,5 @@
 
 {% block extra_scripts %}
 {{ super() }}
-<script src="{{ url_for('static', filename='js/edytuj_stan.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/edytuj_stan.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/admin/formularz_rezerwy.html

@@ -166,5 +166,5 @@
 {% endblock %}
 {% block extra_scripts %}
 {{ super() }}
-<script src="{{ url_for('static', filename='js/formularz_rezerwy.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/formularz_rezerwy.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/admin/formularz_zbiorek.html

@@ -349,10 +349,10 @@
 {% block extra_scripts %}
 {{ super() }}
 <script src="https://cdn.jsdelivr.net/simplemde/latest/simplemde.min.js"></script>
-<script src="{{ url_for('static', filename='js/mde_custom.js') }}?v={{ APP_VERSION }}"></script>
-<script src="{{ url_for('static', filename='js/formularz_zbiorek.js') }}?v={{ APP_VERSION }}"></script>
-<script src="{{ url_for('static', filename='js/produkty_formularz.js') }}?v={{ APP_VERSION }}"></script>
-<script src="{{ url_for('static', filename='js/kwoty_formularz.js') }}?v={{ APP_VERSION }}"></script>
-<script src="{{ url_for('static', filename='js/przelaczniki_zabezpieczenie.js') }}?v={{ APP_VERSION }}"></script>
-<script src="{{ url_for('static', filename='js/sposoby_wplat.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/mde_custom.js') }}"></script>
+<script src="{{ asset_url('js/formularz_zbiorek.js') }}"></script>
+<script src="{{ asset_url('js/produkty_formularz.js') }}"></script>
+<script src="{{ asset_url('js/kwoty_formularz.js') }}"></script>
+<script src="{{ asset_url('js/przelaczniki_zabezpieczenie.js') }}"></script>
+<script src="{{ asset_url('js/sposoby_wplat.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/admin/transakcje.html

@@ -219,5 +219,5 @@
 
 {% block extra_scripts %}
 {{ super() }}
-<script src="{{ url_for('static', filename='js/transakcje.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/transakcje.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/admin/ustawienia.html

@@ -219,5 +219,5 @@
 
 {% block extra_scripts %}
 {{ super() }}
-<script src="{{ url_for('static', filename='js/ustawienia.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/ustawienia.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/base.html

@@ -6,7 +6,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
     <title>{% block title %}Aplikacja Zbiórek{% endblock %}</title>
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootswatch@5.3.0/dist/darkly/bootstrap.min.css">
-    <link rel="stylesheet" href="{{ url_for('static', filename='css/custom.css') }}?v={{ APP_VERSION }}" />
+    <link rel="stylesheet" href="{{ asset_url('css/custom.css') }}" />
     {% block extra_head %}{% endblock %}
 </head>
 
@@ -85,7 +85,7 @@
 
 
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
-    <script src="{{ url_for('static', filename='js/progress.js') }}?v={{ APP_VERSION }}"></script>
+    <script src="{{ asset_url('js/progress.js') }}"></script>
 
     {% block extra_scripts %}{% endblock %}
 </body>

zbiorka_app/templates/error.html

@@ -0,0 +1,21 @@
+{% extends "base.html" %}
+
+{% block title %}{{ error_code }} {{ error_name }}{% endblock %}
+
+{% block content %}
+<div class="row justify-content-center py-5">
+    <div class="col-12 col-md-10 col-lg-8">
+        <div class="card border-warning shadow-sm">
+            <div class="card-body p-4 p-md-5 text-center">
+                <div class="display-4 fw-bold mb-3">{{ error_code }}</div>
+                <h1 class="h3 mb-3">{{ error_name }}</h1>
+                <p class="lead mb-4">{{ error_message }}</p>
+                <div class="d-flex gap-2 justify-content-center flex-wrap">
+                    <a href="{{ url_for('index') }}" class="btn btn-primary">Wroc na strone glowna</a>
+                    <a href="javascript:history.back()" class="btn btn-outline-light">Wroc</a>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+{% endblock %}

zbiorka_app/templates/login.html

@@ -51,5 +51,5 @@
 {% endblock %}
 
 {% block extra_scripts %}
-<script src="{{ url_for('static', filename='js/walidacja_logowanie.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/walidacja_logowanie.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/register.html

@@ -57,5 +57,5 @@
 {% endblock %}
 
 {% block extra_scripts %}
-<script src="{{ url_for('static', filename='js/walidacja_rejestracja.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/walidacja_rejestracja.js') }}"></script>
 {% endblock %}

zbiorka_app/templates/zbiorka.html

@@ -409,6 +409,6 @@
 
 {% block extra_scripts %}
 {{ super() }}
-<script src="{{ url_for('static', filename='js/zbiorka.js') }}?v={{ APP_VERSION }}"></script>
-<script src="{{ url_for('static', filename='js/progress.js') }}?v={{ APP_VERSION }}"></script>
+<script src="{{ asset_url('js/zbiorka.js') }}"></script>
+<script src="{{ asset_url('js/progress.js') }}"></script>
 {% endblock %}

zbiorka_app/utils.py

@@ -0,0 +1,291 @@
+import hashlib
+import ipaddress
+import os
+import re
+import socket
+import threading
+import time
+from datetime import datetime, timezone
+from decimal import Decimal, InvalidOperation
+from functools import lru_cache
+from pathlib import Path
+
+from flask import current_app, request, url_for
+from sqlalchemy import text
+from sqlalchemy.exc import OperationalError
+
+from .extensions import db
+from .models import UstawieniaGlobalne, Uzytkownik
+
+try:
+    from zoneinfo import ZoneInfo
+except ImportError:
+    from backports.zoneinfo import ZoneInfo
+
+LOCAL_TZ = ZoneInfo("Europe/Warsaw")
+_DB_INIT_LOCK = threading.Lock()
+
+
+def read_commit_and_date(filename="version.txt", root_path=None):
+    base = root_path or os.path.dirname(os.path.abspath(__file__))
+    path = os.path.join(base, filename)
+    if not os.path.exists(path):
+        return None, None
+
+    try:
+        commit = open(path, "r", encoding="utf-8").read().strip()
+        if commit:
+            commit = commit[:12]
+    except Exception:
+        commit = None
+
+    try:
+        ts = os.path.getmtime(path)
+        date_str = datetime.fromtimestamp(ts).strftime("%Y.%m.%d")
+    except Exception:
+        date_str = None
+
+    return date_str, commit
+
+
+def set_sqlite_pragma(dbapi_connection, connection_record):
+    if dbapi_connection.__class__.__module__.startswith("sqlite3"):
+        try:
+            cursor = dbapi_connection.cursor()
+            cursor.execute("PRAGMA foreign_keys=ON")
+            cursor.close()
+        except Exception:
+            pass
+
+
+def get_real_ip():
+    headers = request.headers
+    cf_ip = headers.get("CF-Connecting-IP")
+    if cf_ip:
+        return cf_ip.split(",")[0].strip()
+    xff = headers.get("X-Forwarded-For")
+    if xff:
+        return xff.split(",")[0].strip()
+    x_real_ip = headers.get("X-Real-IP")
+    if x_real_ip:
+        return x_real_ip.strip()
+    return request.remote_addr
+
+
+def is_allowed_ip(remote_ip, allowed_hosts_str):
+    if os.path.exists("emergency_access.txt"):
+        return True
+
+    if not allowed_hosts_str or not allowed_hosts_str.strip():
+        return False
+
+    allowed_ips = set()
+    hosts = re.split(r"[\n,]+", allowed_hosts_str.strip())
+
+    for host in hosts:
+        host = host.strip()
+        if not host:
+            continue
+
+        try:
+            allowed_ips.add(ipaddress.ip_address(host))
+            continue
+        except ValueError:
+            pass
+
+        try:
+            infos = socket.getaddrinfo(host, None)
+            for _, _, _, _, sockaddr in infos:
+                ip_str = sockaddr[0]
+                try:
+                    allowed_ips.add(ipaddress.ip_address(ip_str))
+                except ValueError:
+                    continue
+        except Exception as exc:
+            current_app.logger.warning("Nie mozna rozwiazac hosta %s: %s", host, exc)
+
+    try:
+        remote_ip_obj = ipaddress.ip_address(remote_ip)
+    except ValueError:
+        current_app.logger.warning("Nieprawidlowe IP klienta: %s", remote_ip)
+        return False
+
+    is_allowed = remote_ip_obj in allowed_ips
+    current_app.logger.info("is_allowed_ip: %s -> %s (lista: %s)", remote_ip_obj, is_allowed, allowed_ips)
+    return is_allowed
+
+
+def to_local(dt):
+    if dt is None:
+        return None
+    if dt.tzinfo is None:
+        dt = dt.replace(tzinfo=timezone.utc)
+    return dt.astimezone(LOCAL_TZ)
+
+
+def parse_amount(raw: str) -> Decimal:
+    if not raw or not str(raw).strip():
+        raise InvalidOperation("empty amount")
+    norm = str(raw).replace(" ", "").replace("\u00A0", "").replace(",", ".").strip()
+    d = Decimal(norm)
+    if d <= 0:
+        raise InvalidOperation("amount must be > 0")
+    return d
+
+
+def safe_db_rollback() -> None:
+    try:
+        db.session.rollback()
+    except Exception:
+        pass
+
+
+def create_admin_account(force_reset_password: bool = False):
+    admin = Uzytkownik.query.filter_by(czy_admin=True).first()
+    if not admin:
+        admin = Uzytkownik(
+            uzytkownik=current_app.config["MAIN_ADMIN_USERNAME"],
+            czy_admin=True,
+        )
+        admin.set_password(current_app.config["MAIN_ADMIN_PASSWORD"])
+        db.session.add(admin)
+        db.session.commit()
+        return admin
+
+    if force_reset_password:
+        admin.set_password(current_app.config["MAIN_ADMIN_PASSWORD"])
+        db.session.commit()
+    return admin
+
+
+def get_or_create_user(username: str, is_admin: bool = False) -> Uzytkownik:
+    user = Uzytkownik.query.filter_by(uzytkownik=username).first()
+    if user is None:
+        user = Uzytkownik(uzytkownik=username, czy_admin=is_admin)
+        db.session.add(user)
+        db.session.flush()
+    return user
+
+
+def set_user_password(username: str, password: str, is_admin: bool | None = None) -> Uzytkownik:
+    user = Uzytkownik.query.filter_by(uzytkownik=username).first()
+    if user is None:
+        user = Uzytkownik(uzytkownik=username, czy_admin=bool(is_admin))
+        db.session.add(user)
+    elif is_admin is not None:
+        user.czy_admin = bool(is_admin)
+
+    user.set_password(password)
+    db.session.commit()
+    return user
+
+
+def set_login_hosts(hosts: str | None) -> UstawieniaGlobalne:
+    settings = UstawieniaGlobalne.query.first()
+    if settings is None:
+        settings = UstawieniaGlobalne(
+            numer_konta="",
+            numer_telefonu_blik="",
+        )
+        db.session.add(settings)
+
+    settings.dozwolone_hosty_logowania = (hosts or "").strip() or None
+    db.session.commit()
+    return settings
+
+
+def init_version(app):
+    root_path = os.path.dirname(app.root_path)
+    deploy_date, commit = read_commit_and_date("version.txt", root_path=root_path)
+    if not deploy_date:
+        deploy_date = datetime.now().strftime("%Y.%m.%d")
+    if not commit:
+        commit = "dev"
+    app.config["APP_VERSION"] = f"{deploy_date}+{commit}"
+
+
+@lru_cache(maxsize=512)
+def _md5_for_static_file(path_str: str, mtime_ns: int, size: int) -> str:
+    digest = hashlib.md5()
+    with open(path_str, "rb") as handle:
+        for chunk in iter(lambda: handle.read(65536), b""):
+            digest.update(chunk)
+    return digest.hexdigest()[:12]
+
+
+def static_file_hash(filename: str) -> str:
+    static_root = Path(current_app.static_folder).resolve()
+    candidate = (static_root / filename).resolve()
+
+    try:
+        candidate.relative_to(static_root)
+    except ValueError:
+        return "invalid"
+
+    if not candidate.is_file():
+        return "missing"
+
+    stat = candidate.stat()
+    return _md5_for_static_file(str(candidate), stat.st_mtime_ns, stat.st_size)
+
+
+def asset_url(filename: str) -> str:
+    return url_for("static", filename=filename, h=static_file_hash(filename))
+
+
+def is_database_available() -> bool:
+    try:
+        db.session.execute(text("SELECT 1"))
+        return True
+    except Exception:
+        safe_db_rollback()
+        return False
+
+
+def ensure_database_ready(create_schema: bool = True, create_admin: bool = True) -> bool:
+    with _DB_INIT_LOCK:
+        try:
+            db.session.execute(text("SELECT 1"))
+            if create_schema:
+                db.create_all()
+            if create_admin:
+                create_admin_account()
+            current_app.extensions["database_ready"] = True
+            return True
+        except Exception:
+            safe_db_rollback()
+            current_app.extensions["database_ready"] = False
+            raise
+
+
+def init_database_with_retry(app, max_attempts: int = 20, delay: int = 3, raise_on_failure: bool = True) -> bool:
+    last_error = None
+    with app.app_context():
+        for attempt in range(1, max_attempts + 1):
+            try:
+                ensure_database_ready(create_schema=True, create_admin=True)
+                current_app.logger.info("Baza danych gotowa po probie %s/%s", attempt, max_attempts)
+                return True
+            except OperationalError as exc:
+                last_error = exc
+                current_app.logger.warning(
+                    "Baza danych niedostepna (proba %s/%s): %s",
+                    attempt,
+                    max_attempts,
+                    exc,
+                )
+            except Exception as exc:
+                last_error = exc
+                current_app.logger.warning(
+                    "Blad inicjalizacji bazy (proba %s/%s): %s",
+                    attempt,
+                    max_attempts,
+                    exc,
+                )
+
+            if attempt < max_attempts:
+                time.sleep(delay)
+
+    if raise_on_failure and last_error:
+        raise last_error
+    return False