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92 lines
3.1 KiB
TypeScript
92 lines
3.1 KiB
TypeScript
// Short labels and dots plugins put on calendar days (`api.ui.setDayLabels`):
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// a holiday name under the day header, a dot in the small month calendar.
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// Data only; the host draws them.
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export interface DayLabel {
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/** YYYY-MM-DD */
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date: string;
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/** Shown under the day's name in the day and week views (max 24 characters). */
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text?: string;
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/** Tooltip (max 120 characters). */
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title?: string;
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/** A dot on the day in the small month calendar. */
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dot?: boolean;
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}
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export interface RegisteredDayLabel extends DayLabel {
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pluginId: string;
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pluginName: string;
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}
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export const MAX_DAY_LABELS = 400;
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const DATE_RE = /^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$/;
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export function checkDayLabels(value: unknown): DayLabel[] {
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if (!Array.isArray(value)) throw new Error('labels must be a list');
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if (value.length > MAX_DAY_LABELS) throw new Error(`At most ${MAX_DAY_LABELS} day labels`);
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return value.map((raw, i) => {
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if (!raw || typeof raw !== 'object') throw new Error(`labels[${i}] must be an object`);
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const l = raw as Record<string, unknown>;
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if (typeof l.date !== 'string' || !DATE_RE.test(l.date)) throw new Error(`labels[${i}].date must be YYYY-MM-DD`);
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const out: DayLabel = { date: l.date };
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if (l.text !== undefined) {
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if (typeof l.text !== 'string' || l.text.length > 24) throw new Error(`labels[${i}].text must be at most 24 characters`);
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if (l.text.trim()) out.text = l.text.trim();
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}
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if (l.title !== undefined) {
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if (typeof l.title !== 'string' || l.title.length > 120) throw new Error(`labels[${i}].title must be at most 120 characters`);
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if (l.title.trim()) out.title = l.title.trim();
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}
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if (l.dot !== undefined) out.dot = l.dot === true;
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if (!out.text && !out.dot) throw new Error(`labels[${i}] needs text or dot`);
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return out;
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});
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}
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const byPlugin = new Map<string, RegisteredDayLabel[]>();
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const listeners = new Set<() => void>();
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let snapshot: Map<string, RegisteredDayLabel[]> | null = null;
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function changed(): void {
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snapshot = null;
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for (const l of listeners) {
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try { l(); } catch { /* ignore */ }
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}
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}
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export function subscribeDayLabels(listener: () => void): () => void {
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listeners.add(listener);
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return () => { listeners.delete(listener); };
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}
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export function setDayLabels(pluginId: string, pluginName: string, labels: DayLabel[]): void {
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if (labels.length === 0) byPlugin.delete(pluginId);
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else byPlugin.set(pluginId, labels.map((l) => ({ ...l, pluginId, pluginName })));
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changed();
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}
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export function clearDayLabels(pluginId: string): void {
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if (byPlugin.delete(pluginId)) changed();
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}
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/** Labels by date. Stable between changes (for useSyncExternalStore). */
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export function dayLabelsByDate(): Map<string, RegisteredDayLabel[]> {
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if (snapshot) return snapshot;
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const out = new Map<string, RegisteredDayLabel[]>();
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for (const labels of byPlugin.values()) {
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for (const l of labels) {
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const list = out.get(l.date);
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if (list) list.push(l);
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else out.set(l.date, [l]);
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}
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}
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snapshot = out;
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return out;
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}
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/** Test helper. */
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export function resetDayLabels(): void {
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byPlugin.clear();
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changed();
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}
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