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23 lines
1.0 KiB
TypeScript
23 lines
1.0 KiB
TypeScript
/**
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* Pending edits on an admin page, keyed by config key. An edit that puts the
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* saved value back is no edit: typing into an empty field and deleting it
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* again leaves nothing to save, so the save bar goes away.
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*/
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/** Whether a field holds what is saved: an empty field equals an unset key. */
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export function sameConfigValue(value: unknown, saved: unknown): boolean {
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const blank = (v: unknown) => v === undefined || v === null || v === '';
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if (blank(value) || blank(saved)) return blank(value) && blank(saved);
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if (typeof value === 'object' || typeof saved === 'object') return JSON.stringify(value) === JSON.stringify(saved);
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// A number field hands back text.
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return String(value) === String(saved);
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}
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/** `edits` with `key` set to `value`, or without `key` when `value` is what is saved. */
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export function withEdit<T>(edits: Record<string, T>, key: string, value: T, saved: unknown): Record<string, T> {
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const next = { ...edits };
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if (sameConfigValue(value, saved)) delete next[key];
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else next[key] = value;
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return next;
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}
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