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* Common: IndexedDB

Stellt Funktionen zum Speichern und Abrufen von Daten in der IndexedDB bereit

Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @require https://update.greasyfork.org/scripts/553985/1685377/%2A%20Common%3A%20IndexedDB.js 

// ==UserScript==
// @name        * Common: IndexedDB (Fork by Shihu)
// @namespace   Shihu
// @version     1.0.1
// @license     BSD-3-Clause
// @author      BOS-Ernie (Original), Shihu (Fork/Maintainer)
// @description Funktionen zum Speichern und Abrufen von Daten in der IndexedDB
// @icon        https://www.google.com/s2/favicons?sz=64&domain=leitstellenspiel.de
// @run-at      document-idle
// @grant       none
// ==/UserScript==

const databaseName = "BosErnie";
const objectStoreName = "GebäudeUndFahrzeugVerwalter";

function openDB() {
  return new Promise((resolve, reject) => {
    const request = window.indexedDB.open(databaseName, 1);

    request.onerror = () => {
      reject("Failed to open the database");
    };

    request.onsuccess = event => {
      const db = event.target.result;
      resolve(db);
    };

    request.onupgradeneeded = event => {
      const db = event.target.result;
      const objectStore = db.createObjectStore(objectStoreName);
      objectStore.createIndex("IndexName", "propertyName", { unique: false });
    };
  });
}

async function storeData(data, key) {
  const db = await openDB();

  return new Promise((resolve, reject) => {
    const transaction = db.transaction([objectStoreName], "readwrite");
    const objectStore = transaction.objectStore(objectStoreName);

    const request = objectStore.put(data, key);

    request.onsuccess = () => {
      resolve("Data stored successfully");
    };

    request.onerror = () => {
      reject("Failed to store data");
    };
  });
}

async function retrieveData(key) {
  const db = await openDB();

  return new Promise((resolve, reject) => {
    const transaction = db.transaction([objectStoreName], "readonly");
    const objectStore = transaction.objectStore(objectStoreName);

    const request = objectStore.get(key);

    request.onsuccess = event => {
      const data = event.target.result;
      resolve(data);
    };

    request.onerror = () => {
      reject("Failed to retrieve data");
    };
  });
}

/**
 * @license
 * BSD 3-Clause License
 * 
 * Original work Copyright (c) [Jahr], BOS-Ernie
 * Modified and maintained by [Dein Name], 2025
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of BOS-Ernie nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific
 *    prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * ...
 */