15 lines
499 B
TypeScript
15 lines
499 B
TypeScript
export type Visibility = "draft" | "internal" | "public";
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/** The legal one-step visibility moves from `v`, per the backend state machine
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* (Draft<->Internal, Internal<->Public; no skipping). */
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export function adjacentTransitions(v: Visibility): { forward?: Visibility; back?: Visibility } {
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switch (v) {
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case "draft":
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return { forward: "internal" };
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case "internal":
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return { forward: "public", back: "draft" };
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case "public":
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return { back: "internal" };
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}
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}
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