112 lines
3.2 KiB
TypeScript
112 lines
3.2 KiB
TypeScript
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/**
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* IndexedDB wrapper for the POS offline order queue.
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* All reads/writes happen in a single "order_queue" object store.
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*/
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export type OfflineQueueItem = {
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/** Local UUID – primary key */
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id: string;
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/** "create_order" or "add_items_to_order" */
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type: "create_order" | "add_items";
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cafeId: string;
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/**
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* For add_items: the real server order ID.
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* For create_order: null (no server ID yet).
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*/
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targetOrderId: string | null;
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/** Raw body to POST/PUT */
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payload: unknown;
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createdAt: string;
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retries: number;
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status: "pending" | "failed";
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};
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const DB_NAME = "meezi_pos_offline";
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const DB_VERSION = 1;
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const STORE = "order_queue";
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let _db: IDBDatabase | null = null;
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function openDb(): Promise<IDBDatabase> {
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if (_db) return Promise.resolve(_db);
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return new Promise((resolve, reject) => {
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const req = indexedDB.open(DB_NAME, DB_VERSION);
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req.onupgradeneeded = (e) => {
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const db = (e.target as IDBOpenDBRequest).result;
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if (!db.objectStoreNames.contains(STORE)) {
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db.createObjectStore(STORE, { keyPath: "id" });
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}
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};
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req.onsuccess = () => {
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_db = req.result;
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resolve(_db);
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};
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req.onerror = () => reject(req.error);
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});
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}
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export async function enqueueOfflineItem(
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item: Omit<OfflineQueueItem, "retries" | "status">
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): Promise<void> {
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const db = await openDb();
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return new Promise((resolve, reject) => {
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const tx = db.transaction(STORE, "readwrite");
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tx.objectStore(STORE).put({ ...item, retries: 0, status: "pending" });
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tx.oncomplete = () => resolve();
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tx.onerror = () => reject(tx.error);
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});
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}
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export async function getQueueCount(): Promise<number> {
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try {
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const db = await openDb();
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return new Promise((resolve, reject) => {
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const tx = db.transaction(STORE, "readonly");
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const req = tx.objectStore(STORE).count();
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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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} catch {
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return 0;
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}
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}
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export async function getAllQueueItems(): Promise<OfflineQueueItem[]> {
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try {
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const db = await openDb();
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return new Promise((resolve, reject) => {
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const tx = db.transaction(STORE, "readonly");
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const req = tx.objectStore(STORE).getAll();
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req.onsuccess = () => resolve(req.result as OfflineQueueItem[]);
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req.onerror = () => reject(req.error);
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});
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} catch {
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return [];
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}
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}
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export async function removeQueueItem(id: string): Promise<void> {
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const db = await openDb();
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return new Promise((resolve, reject) => {
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const tx = db.transaction(STORE, "readwrite");
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tx.objectStore(STORE).delete(id);
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tx.oncomplete = () => resolve();
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tx.onerror = () => reject(tx.error);
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});
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}
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export async function markQueueItemFailed(id: string): Promise<void> {
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const db = await openDb();
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return new Promise((resolve, reject) => {
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const tx = db.transaction(STORE, "readwrite");
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const store = tx.objectStore(STORE);
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const getReq = store.get(id);
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getReq.onsuccess = () => {
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const item = getReq.result as OfflineQueueItem;
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if (item) store.put({ ...item, status: "failed", retries: item.retries + 1 });
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};
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tx.oncomplete = () => resolve();
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tx.onerror = () => reject(tx.error);
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});
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}
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