26 lines
839 B
TypeScript
26 lines
839 B
TypeScript
// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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/**
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* `ReadStatus` represents your local read/viewed status of a single incoming message.
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* Messages go from Unread to Read to Viewed; they never go "backwards".
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*
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* Note that a conversation can be marked unread, which is not at the message level.
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*
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* Be careful when changing these values, as they are persisted. Notably, we previously
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* had a field called "unread", which is why Unread corresponds to 1 and Read to 0.
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*/
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export enum ReadStatus {
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Unread = 1,
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Read = 0,
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Viewed = 2,
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}
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const STATUS_NUMBERS: Record<ReadStatus, number> = {
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[ReadStatus.Unread]: 0,
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[ReadStatus.Read]: 1,
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[ReadStatus.Viewed]: 2,
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};
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export const maxReadStatus = (a: ReadStatus, b: ReadStatus): ReadStatus =>
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STATUS_NUMBERS[a] > STATUS_NUMBERS[b] ? a : b;
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