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59 lines
2.2 KiB
TypeScript
59 lines
2.2 KiB
TypeScript
/*
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Copyright 2022 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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/**
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* The preferred room versions for various features within the app. The
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* room versions here are selected based on the client's support for the
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* possible room versions in combination with server support in the
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* ecosystem.
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*
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* Loosely follows https://spec.matrix.org/latest/rooms/#feature-matrix
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*/
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export class PreferredRoomVersions {
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/**
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* The room version to use when creating "knock" rooms.
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*/
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public static readonly KnockRooms = "7";
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/**
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* The room version to use when creating "restricted" rooms.
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*/
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public static readonly RestrictedRooms = "9";
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private constructor() {
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// readonly, static, class
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}
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}
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/**
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* Determines if a room version supports the given feature using heuristics
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* for how Matrix works.
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* @param roomVer The room version to check support within.
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* @param featureVer The room version of the feature. Should be from PreferredRoomVersions.
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* @see PreferredRoomVersions
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*/
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export function doesRoomVersionSupport(roomVer: string, featureVer: string): boolean {
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// Assumption: all unstable room versions don't support the feature. Calling code can check for unstable
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// room versions explicitly if it wants to. The spec reserves [0-9] and `.` for its room versions.
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if (!roomVer.match(/[\d.]+/)) {
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return false;
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}
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// Dev note: While the spec says room versions are not linear, we can make reasonable assumptions
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// until the room versions prove themselves to be non-linear in the spec. We should see this coming
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// from a mile away and can course-correct this function if needed.
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return Number(roomVer) >= Number(featureVer);
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}
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