forked from mystiq/hydrogen-web
60 lines
2.0 KiB
JavaScript
60 lines
2.0 KiB
JavaScript
import { StorageError } from "../../common.js";
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import Platform from "../../../../Platform.js";
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import { encodeUint32 } from "../utils.js";
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function encodeKey(roomId, fragmentId) {
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return `${roomId}|${encodeUint32(fragmentId)}`;
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}
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export default class RoomFragmentStore {
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constructor(store) {
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this._store = store;
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}
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_allRange(roomId) {
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try {
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return IDBKeyRange.bound(
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encodeKey(roomId, Platform.minStorageKey),
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encodeKey(roomId, Platform.maxStorageKey)
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);
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} catch (err) {
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throw new StorageError(`error from IDBKeyRange with roomId ${roomId}`, err);
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}
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}
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all(roomId) {
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return this._store.selectAll(this._allRange(roomId));
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}
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/** Returns the fragment without a nextToken and without nextId,
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if any, with the largest id if there are multiple (which should not happen) */
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liveFragment(roomId) {
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// why do we need this?
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// Ok, take the case where you've got a /context fragment and a /sync fragment
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// They are not connected. So, upon loading the persister, which one do we take? We can't sort them ...
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// we assume that the one without a nextToken and without a nextId is a live one
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// there should really be only one like this
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// reverse because assuming live fragment has bigger id than non-live ones
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return this._store.findReverse(this._allRange(roomId), fragment => {
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return typeof fragment.nextId !== "number" && typeof fragment.nextToken !== "string";
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});
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}
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// should generate an id an return it?
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// depends if we want to do anything smart with fragment ids,
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// like give them meaning depending on range. not for now probably ...
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add(fragment) {
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fragment.key = encodeKey(fragment.roomId, fragment.id);
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return this._store.add(fragment);
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}
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update(fragment) {
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return this._store.put(fragment);
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}
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get(roomId, fragmentId) {
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return this._store.get(encodeKey(roomId, fragmentId));
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}
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}
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