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typing_status: Remove unchecked casts in same_recipient.

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Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit is contained in:
Anders Kaseorg
2023-10-24 17:28:24 -07:00
committed by Tim Abbott
parent 9c9c453d5a
commit 043b43f044
1 changed files with 5 additions and 13 deletions
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18
web/shared/src/typing_status.ts
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@@ -18,13 +18,6 @@ type TypingStatusState = {
idle_timer: ReturnType<typeof setTimeout>;
};
function message_type(recipient: Recipient): "direct" | "stream" {
if (Array.isArray(recipient)) {
return "direct";
}
return "stream";
}
function lower_same(a: string, b: string): boolean {
return a.toLowerCase() === b.toLowerCase();
}
@@ -39,13 +32,12 @@ function same_recipient(a: Recipient | null, b: Recipient | null): boolean {
return false;
}
if (message_type(a) === "direct" && message_type(b) === "direct") {
if (Array.isArray(a) && Array.isArray(b)) {
// direct message recipients
return _.isEqual(a, b);
} else if (message_type(a) === "stream" && message_type(b) === "stream") {
// type assertions to avoid linter error
const aStreamTopic = a as StreamTopic;
const bStreamTopic = b as StreamTopic;
return same_stream_and_topic(aStreamTopic, bStreamTopic);
} else if (!Array.isArray(a) && !Array.isArray(b)) {
// stream recipients
return same_stream_and_topic(a, b);
}
return false;