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| 1 | +<!doctype html> |
| 2 | +<html> |
| 3 | + |
| 4 | +<head> |
| 5 | + <meta http-equiv='X-UA-Compatible' content='IE=edge' /> |
| 6 | + <meta charset='utf-8' /> |
| 7 | + |
| 8 | + <script type='text/javascript'> |
| 9 | + const INDEXED_DB_VERSION = 1; |
| 10 | + const INDEXED_DB_NAME = 'tgui'; |
| 11 | + const INDEXED_DB_STORE_NAME = 'storage'; |
| 12 | + |
| 13 | + const READ_ONLY = 'readonly'; |
| 14 | + const READ_WRITE = 'readwrite'; |
| 15 | + |
| 16 | + const dbPromise = new Promise((resolve, reject) => { |
| 17 | + const indexedDB = window.indexedDB || window.msIndexedDB; |
| 18 | + const req = indexedDB.open(INDEXED_DB_NAME, INDEXED_DB_VERSION); |
| 19 | + req.onupgradeneeded = () => { |
| 20 | + try { |
| 21 | + req.result.createObjectStore(INDEXED_DB_STORE_NAME); |
| 22 | + } catch (err) { |
| 23 | + reject(new Error('Failed to upgrade IDB: ' + req.error)); |
| 24 | + } |
| 25 | + }; |
| 26 | + req.onsuccess = () => resolve(req.result); |
| 27 | + req.onerror = () => { |
| 28 | + reject(new Error('Failed to open IDB: ' + req.error)); |
| 29 | + }; |
| 30 | + }); |
| 31 | + |
| 32 | + window.addEventListener('message', (messageEvent) => { |
| 33 | + switch (messageEvent.data.type) { |
| 34 | + case 'get': |
| 35 | + get(event.data.key).then((value) => { |
| 36 | + messageEvent.source.postMessage({key: messageEvent.data.key, value: value}, "*") |
| 37 | + }); |
| 38 | + break; |
| 39 | + case 'set': |
| 40 | + set(messageEvent.data.key, messageEvent.data.value); |
| 41 | + break; |
| 42 | + case 'remove': |
| 43 | + remove(messageEvent.data.key); |
| 44 | + break; |
| 45 | + case 'clear': |
| 46 | + clear(); |
| 47 | + break; |
| 48 | + default: |
| 49 | + break; |
| 50 | + } |
| 51 | + }); |
| 52 | + |
| 53 | + const getStore = async (mode) => { |
| 54 | + return dbPromise.then((db) => db |
| 55 | + .transaction(INDEXED_DB_STORE_NAME, mode) |
| 56 | + .objectStore(INDEXED_DB_STORE_NAME)); |
| 57 | + }; |
| 58 | + |
| 59 | + const get = async (key) => { |
| 60 | + const store = await getStore(READ_ONLY); |
| 61 | + return new Promise((resolve, reject) => { |
| 62 | + const req = store.get(key); |
| 63 | + req.onsuccess = () => resolve(req.result); |
| 64 | + req.onerror = () => reject(req.error); |
| 65 | + }); |
| 66 | + }; |
| 67 | + |
| 68 | + const set = async (key, value) => { |
| 69 | + const store = await getStore(READ_WRITE); |
| 70 | + store.put(value, key); |
| 71 | + }; |
| 72 | + |
| 73 | + const remove = async (key) => { |
| 74 | + const store = await getStore(READ_WRITE); |
| 75 | + store.delete(key); |
| 76 | + }; |
| 77 | + |
| 78 | + const clear = async () => { |
| 79 | + const store = await getStore(READ_WRITE); |
| 80 | + store.clear(); |
| 81 | + }; |
| 82 | + </script> |
| 83 | +</head> |
| 84 | + |
| 85 | +</html> |
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