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element-web/src/utils/room/shouldEncryptRoomWithSingle3rdPartyInvite.ts
David Langley 491f0cd08a Change license (#13)
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TypeScript

/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
import { MatrixEvent, Room } from "matrix-js-sdk/src/matrix";
import DMRoomMap from "../DMRoomMap";
import { privateShouldBeEncrypted } from "../rooms";
/**
* Tests whether a DM room with exactly one third-party invite should be encrypted.
* If it should be encrypted, the third-party invitation event is also returned.
*/
export const shouldEncryptRoomWithSingle3rdPartyInvite = (
room: Room,
): { shouldEncrypt: true; inviteEvent: MatrixEvent } | { shouldEncrypt: false; inviteEvent?: undefined } => {
// encryption not promoted via .well-known
if (!privateShouldBeEncrypted(room.client)) return { shouldEncrypt: false };
// not a DM room
if (!DMRoomMap.shared().getRoomIds().has(room.roomId)) return { shouldEncrypt: false };
// more than one room member / invite
if (room.getInvitedAndJoinedMemberCount() !== 1) return { shouldEncrypt: false };
const thirdPartyInvites = room.currentState.getStateEvents("m.room.third_party_invite") || [];
if (thirdPartyInvites.length === 1) {
return {
shouldEncrypt: true,
inviteEvent: thirdPartyInvites[0],
};
}
return { shouldEncrypt: false };
};