70 lines
2.4 KiB
JavaScript
70 lines
2.4 KiB
JavaScript
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import _defineProperty from "@babel/runtime/helpers/defineProperty";
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/*
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Copyright 2025-2026 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { getEncryptionKeyMapKey } from "./EncryptionManager.js";
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/**
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* Detects when a key for a given index is outdated.
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*/
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export class OutdatedKeyFilter {
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constructor() {
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// Map of participantId -> keyIndex -> timestamp
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_defineProperty(this, "tsBuffer", new Map());
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}
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/**
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* Check if there is a recent key with the same keyId (index) and then use the creationTS to decide what to
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* do with the key. If the key received is older than the one already in the buffer, it is ignored.
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* @param participantId
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* @param item
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*/
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isOutdated(membership, item) {
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const mapKey = getEncryptionKeyMapKey(membership);
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if (!this.tsBuffer.has(mapKey)) {
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this.tsBuffer.set(mapKey, new Map());
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}
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const latestTimestamp = this.tsBuffer.get(mapKey)?.get(item.keyIndex);
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if (latestTimestamp && latestTimestamp > item.creationTS) {
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// The existing key is more recent, ignore this one
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return true;
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}
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this.tsBuffer.get(mapKey).set(item.keyIndex, item.creationTS);
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return false;
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}
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}
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/**
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* Converts a slot ID into it's component application and ID portions.
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* @param slotId e.g. `m.call#call_id`
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* @throws If the format of `slotId` is invalid.
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*/
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export function slotIdToDescription(slotId) {
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const [application, id, ...unexpectedAdditionalValues] = slotId.split("#");
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if (unexpectedAdditionalValues.length) {
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throw Error("MatrixRTC Slot IDs *must* only contain two components seperated by one '#'. Additional '#' characters detected.");
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}
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return {
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application,
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id
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};
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}
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/**
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* Converts a SlotDescription into it's slot ID format.
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*/
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export function computeSlotId(slotDescription) {
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return `${slotDescription.application}#${slotDescription.id}`;
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}
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//# sourceMappingURL=utils.js.map
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