72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
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/**
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* Persistence.js
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* Handles asynchronous saving and loading using IndexedDB.
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*/
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const DB_NAME = "AetherShardsDB";
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const STORE_NAME = "Runs";
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const VERSION = 1;
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export class Persistence {
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constructor() {
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this.db = null;
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}
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async init() {
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return new Promise((resolve, reject) => {
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const request = indexedDB.open(DB_NAME, VERSION);
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request.onerror = (e) => reject("DB Error: " + e.target.error);
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request.onupgradeneeded = (e) => {
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const db = e.target.result;
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if (!db.objectStoreNames.contains(STORE_NAME)) {
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db.createObjectStore(STORE_NAME, { keyPath: "id" });
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}
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};
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request.onsuccess = (e) => {
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this.db = e.target.result;
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resolve();
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};
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});
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}
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async saveRun(runData) {
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if (!this.db) await this.init();
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return new Promise((resolve, reject) => {
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const tx = this.db.transaction([STORE_NAME], "readwrite");
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const store = tx.objectStore(STORE_NAME);
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// Always use ID 'active_run' for the single active session
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runData.id = "active_run";
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const req = store.put(runData);
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req.onsuccess = () => resolve();
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req.onerror = () => reject(req.error);
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});
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}
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async loadRun() {
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if (!this.db) await this.init();
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return new Promise((resolve, reject) => {
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const tx = this.db.transaction([STORE_NAME], "readonly");
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const store = tx.objectStore(STORE_NAME);
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const req = store.get("active_run");
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req.onsuccess = () => resolve(req.result);
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req.onerror = () => reject(req.error);
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});
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}
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async clearRun() {
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if (!this.db) await this.init();
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return new Promise((resolve, reject) => {
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const tx = this.db.transaction([STORE_NAME], "readwrite");
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const store = tx.objectStore(STORE_NAME);
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const req = store.delete("active_run");
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req.onsuccess = () => resolve();
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req.onerror = () => reject(req.error);
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});
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}
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}
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