File size: 7,918 Bytes
494c9e4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 | export type CacheNamespace = 'chat' | 'attribution' | 'gen_attr';
export type CacheStatus = 'partial' | 'complete';
/** 仅存业务数据，不含 MRU 时间戳 */
type PayloadRow = {
id: string;
namespace: CacheNamespace;
contentKey: string;
businessKeyJson: string;
listLabel: string;
payload: unknown;
status: CacheStatus;
createdAt: number;
};
/** 每 namespace 一条：keyOrder 为 contentKey 序列，末尾为最近使用 */
type MruRow = {
namespace: CacheNamespace;
keyOrder: string[];
};
/** 与旧版 `InfoRadarCache` 分离，避免沿用有问题的升级路径；旧库可随浏览器站点数据清理 */
const DB_NAME = 'InfoRadarSharedCache';
const DB_VERSION = 1;
const STORE_PAYLOADS = 'payloads';
const STORE_MRU = 'mru_order';
let dbPromise: Promise<IDBDatabase> | null = null;
function simpleHash(s: string): string {
let h = 0;
for (let i = 0; i < s.length; i++) {
h = ((h << 5) - h + s.charCodeAt(i)) | 0;
}
return (h >>> 0).toString(36);
}
function rowId(namespace: CacheNamespace, contentKey: string): string {
return `${namespace}:${contentKey}`;
}
function promisifyRequest<T>(req: IDBRequest<T>): Promise<T> {
return new Promise((resolve, reject) => {
req.onsuccess = () => resolve(req.result);
req.onerror = () => reject(req.error ?? new Error('IndexedDB request failed'));
});
}
function promisifyTransaction(tx: IDBTransaction): Promise<void> {
return new Promise((resolve, reject) => {
tx.oncomplete = () => resolve();
tx.onerror = () => reject(tx.error ?? new Error('IndexedDB transaction failed'));
tx.onabort = () => reject(tx.error ?? new Error('IndexedDB transaction aborted'));
});
}
function openDb(): Promise<IDBDatabase> {
return new Promise((resolve, reject) => {
const req = indexedDB.open(DB_NAME, DB_VERSION);
req.onerror = () => reject(req.error ?? new Error('Failed to open IndexedDB'));
req.onsuccess = () => resolve(req.result);
req.onupgradeneeded = () => {
const db = req.result;
if (!db.objectStoreNames.contains(STORE_PAYLOADS)) {
db.createObjectStore(STORE_PAYLOADS, { keyPath: 'id' });
}
if (!db.objectStoreNames.contains(STORE_MRU)) {
db.createObjectStore(STORE_MRU, { keyPath: 'namespace' });
}
};
});
}
async function getDb(): Promise<IDBDatabase> {
if (!dbPromise) {
dbPromise = openDb().catch((e) => {
dbPromise = null;
throw e;
});
}
return dbPromise;
}
async function readMru(tx: IDBTransaction, namespace: CacheNamespace): Promise<string[]> {
const row = await promisifyRequest(tx.objectStore(STORE_MRU).get(namespace) as IDBRequest<MruRow | undefined>);
return Array.isArray(row?.keyOrder) ? row.keyOrder : [];
}
async function writeMru(tx: IDBTransaction, namespace: CacheNamespace, keyOrder: string[]): Promise<void> {
await promisifyRequest(tx.objectStore(STORE_MRU).put({ namespace, keyOrder } satisfies MruRow));
}
export type CachedHistoryEntry<T> = {
contentKey: string;
businessKeyJson: string;
listLabel: string;
payload: T;
status: CacheStatus;
createdAt: number;
};
/** 下拉列表一行：id 为 {@link CachedHistoryEntry.contentKey}，label 为展示文案 */
export type CachedHistoryListRow = Pick<CachedHistoryEntry<unknown>, 'contentKey' | 'listLabel'>;
export function buildContentKeyFromBusinessKey(businessKey: unknown): string {
return simpleHash(JSON.stringify(businessKey));
}
function payloadRowToEntry<T>(row: PayloadRow): CachedHistoryEntry<T> {
return {
contentKey: row.contentKey,
businessKeyJson: row.businessKeyJson,
listLabel: row.listLabel,
payload: row.payload as T,
status: row.status,
createdAt: row.createdAt,
};
}
export async function getByContentKey<T>(
namespace: CacheNamespace,
contentKey: string
): Promise<CachedHistoryEntry<T> | undefined> {
const db = await getDb();
const tx = db.transaction(STORE_PAYLOADS, 'readonly');
const row = await promisifyRequest(
tx.objectStore(STORE_PAYLOADS).get(rowId(namespace, contentKey)) as IDBRequest<PayloadRow | undefined>
);
await promisifyTransaction(tx);
if (!row) return undefined;
return payloadRowToEntry<T>(row);
}
export async function upsertEntry<T>(params: {
namespace: CacheNamespace;
businessKeyJson: string;
listLabel: string;
payload: T;
status: CacheStatus;
maxEntries: number;
}): Promise<{ contentKey: string }> {
const { namespace, businessKeyJson, listLabel, payload, status, maxEntries } = params;
const contentKey = simpleHash(businessKeyJson);
const id = rowId(namespace, contentKey);
const db = await getDb();
const tx = db.transaction([STORE_PAYLOADS, STORE_MRU], 'readwrite');
const payloadStore = tx.objectStore(STORE_PAYLOADS);
const existing = await promisifyRequest(payloadStore.get(id) as IDBRequest<PayloadRow | undefined>);
const now = Date.now();
const hadKey = !!existing;
let keyOrder = await readMru(tx, namespace);
const idx = keyOrder.indexOf(contentKey);
if (idx >= 0) keyOrder.splice(idx, 1);
if (keyOrder.length >= maxEntries && !hadKey) {
const oldest = keyOrder.shift();
if (oldest !== undefined) {
await promisifyRequest(payloadStore.delete(rowId(namespace, oldest)));
}
}
await promisifyRequest(
payloadStore.put({
id,
namespace,
contentKey,
businessKeyJson,
listLabel,
payload,
status,
createdAt: existing?.createdAt ?? now,
} satisfies PayloadRow)
);
keyOrder.push(contentKey);
await writeMru(tx, namespace, keyOrder);
await promisifyTransaction(tx);
return { contentKey };
}
export async function touchByContentKey(namespace: CacheNamespace, contentKey: string): Promise<void> {
const db = await getDb();
const tx = db.transaction([STORE_PAYLOADS, STORE_MRU], 'readwrite');
const payloadStore = tx.objectStore(STORE_PAYLOADS);
const exists = await promisifyRequest(payloadStore.get(rowId(namespace, contentKey)) as IDBRequest<PayloadRow | undefined>);
if (!exists) {
await promisifyTransaction(tx);
return;
}
let keyOrder = await readMru(tx, namespace);
const idx = keyOrder.indexOf(contentKey);
if (idx >= 0) keyOrder.splice(idx, 1);
keyOrder.push(contentKey);
await writeMru(tx, namespace, keyOrder);
await promisifyTransaction(tx);
}
export async function removeByContentKey(namespace: CacheNamespace, contentKey: string): Promise<void> {
const db = await getDb();
const tx = db.transaction([STORE_PAYLOADS, STORE_MRU], 'readwrite');
await promisifyRequest(tx.objectStore(STORE_PAYLOADS).delete(rowId(namespace, contentKey)));
let keyOrder = await readMru(tx, namespace);
keyOrder = keyOrder.filter((k) => k !== contentKey);
await writeMru(tx, namespace, keyOrder);
await promisifyTransaction(tx);
}
export async function listMru<T>(namespace: CacheNamespace): Promise<Array<CachedHistoryEntry<T>>> {
const db = await getDb();
const tx = db.transaction([STORE_PAYLOADS, STORE_MRU], 'readonly');
const keyOrder = await readMru(tx, namespace);
const payloadStore = tx.objectStore(STORE_PAYLOADS);
const result: Array<CachedHistoryEntry<T>> = [];
for (let i = keyOrder.length - 1; i >= 0; i--) {
const ck = keyOrder[i];
const row = await promisifyRequest(payloadStore.get(rowId(namespace, ck)) as IDBRequest<PayloadRow | undefined>);
if (row) result.push(payloadRowToEntry<T>(row));
}
await promisifyTransaction(tx);
return result;
}
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