30 lines
906 B
TypeScript
30 lines
906 B
TypeScript
export const STALE_CANVAS_REVISION_CODE = "STALE_CANVAS_REVISION";
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export function parseCanvasRevisionDate(value: unknown) {
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const raw = String(value || "").trim();
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if (!raw) return null;
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const parsed = new Date(raw);
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return Number.isNaN(parsed.getTime()) ? null : parsed;
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}
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export function isStaleCanvasSaveBaseRevision(params: {
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baseCanvasRevision?: unknown;
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baseCanvasUpdatedAt?: unknown;
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currentUpdatedAt: Date;
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}) {
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const baseDate = parseCanvasRevisionDate(
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params.baseCanvasUpdatedAt || params.baseCanvasRevision
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);
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if (!baseDate) return false;
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return baseDate.getTime() < params.currentUpdatedAt.getTime();
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}
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export function buildStaleCanvasSaveConflictPayload(currentUpdatedAt: Date) {
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return {
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success: false,
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error: "画布已更新，请刷新后再保存",
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code: STALE_CANVAS_REVISION_CODE,
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canvasUpdatedAt: currentUpdatedAt.toISOString(),
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};
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}
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