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