Clément Fiere
27 lines
959 B
TypeScript
27 lines
959 B
TypeScript
function validRevision(value: number | null | undefined): number | null {
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if (typeof value !== "number" || !Number.isSafeInteger(value) || value < 0) return null;
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return value;
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}
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export function compareUserSettingsRevisions(
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left: number | null | undefined,
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right: number | null | undefined,
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): -1 | 0 | 1 | null {
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const leftValue = validRevision(left);
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const rightValue = validRevision(right);
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if (leftValue === null && rightValue === null) return null;
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if (leftValue === null) return -1;
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if (rightValue === null) return 1;
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if (leftValue === rightValue) return 0;
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return leftValue > rightValue ? 1 : -1;
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}
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export function isUserSettingsResponseCurrent(
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responseRevision: number | null | undefined,
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currentRevision: number | null | undefined,
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isSubmittedSnapshot: boolean,
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): boolean {
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const order = compareUserSettingsRevisions(responseRevision, currentRevision);
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return order === null ? isSubmittedSnapshot : order >= 0;
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}
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