35 lines
1.1 KiB
TypeScript
35 lines
1.1 KiB
TypeScript
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/**
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* Module-level tracker for user-send animations.
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*
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* Marks a session when the user presses "send" so that MessageList
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* can distinguish genuinely new user messages from historical ones
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* arriving via async loading / session switch.
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*/
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const pendingCounts = new Map<string, number>();
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/** Call when user triggers a send (before the API call). */
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export const markPendingUserSendAnimation = (sessionId: string): void => {
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pendingCounts.set(sessionId, (pendingCounts.get(sessionId) ?? 0) + 1);
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};
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/** Check whether this session has pending send animations. */
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export const hasPendingUserSendAnimation = (sessionId: string): boolean => {
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return (pendingCounts.get(sessionId) ?? 0) > 0;
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};
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/**
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* Consume one pending send animation for the session.
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* Returns true if there was one to consume.
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*/
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export const consumePendingUserSendAnimation = (sessionId: string): boolean => {
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const count = pendingCounts.get(sessionId) ?? 0;
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if (count <= 0) return false;
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if (count === 1) {
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pendingCounts.delete(sessionId);
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} else {
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pendingCounts.set(sessionId, count - 1);
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}
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return true;
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};
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