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import { StorageAdapter } from "./types";
export class IndexedDBAdapter<T> implements StorageAdapter<T> {
private dbName: string;
private storeName: string;
private version: number;
constructor(dbName: string, storeName: string, version: number = 1) {
this.dbName = dbName;
this.storeName = storeName;
this.version = version;
}
private async getDB(): Promise<IDBDatabase> {
return new Promise((resolve, reject) => {
const request = indexedDB.open(this.dbName, this.version);
request.onerror = () => reject(request.error);
request.onsuccess = () => resolve(request.result);
request.onupgradeneeded = (event) => {
const db = (event.target as IDBOpenDBRequest).result;
if (!db.objectStoreNames.contains(this.storeName)) {
db.createObjectStore(this.storeName, { keyPath: "id" });
}
};
});
}
async get(key: string): Promise<T | null> {
const db = await this.getDB();
const transaction = db.transaction([this.storeName], "readonly");
const store = transaction.objectStore(this.storeName);
return new Promise((resolve, reject) => {
const request = store.get(key);
request.onerror = () => reject(request.error);
request.onsuccess = () => resolve(request.result || null);
});
}
async set(key: string, value: T): Promise<void> {
const db = await this.getDB();
const transaction = db.transaction([this.storeName], "readwrite");
const store = transaction.objectStore(this.storeName);
return new Promise((resolve, reject) => {
const request = store.put({ id: key, ...value });
request.onerror = () => reject(request.error);
request.onsuccess = () => resolve();
});
}
async remove(key: string): Promise<void> {
const db = await this.getDB();
const transaction = db.transaction([this.storeName], "readwrite");
const store = transaction.objectStore(this.storeName);
return new Promise((resolve, reject) => {
const request = store.delete(key);
request.onerror = () => reject(request.error);
request.onsuccess = () => resolve();
});
}
async list(): Promise<string[]> {
const db = await this.getDB();
const transaction = db.transaction([this.storeName], "readonly");
const store = transaction.objectStore(this.storeName);
return new Promise((resolve, reject) => {
const request = store.getAllKeys();
request.onerror = () => reject(request.error);
request.onsuccess = () => resolve(request.result as string[]);
});
}
async clear(): Promise<void> {
const db = await this.getDB();
const transaction = db.transaction([this.storeName], "readwrite");
const store = transaction.objectStore(this.storeName);
return new Promise((resolve, reject) => {
const request = store.clear();
request.onerror = () => reject(request.error);
request.onsuccess = () => resolve();
});
}
}
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