61 lines
1.8 KiB
JavaScript
61 lines
1.8 KiB
JavaScript
(function (root, factory) {
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const api = factory();
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if (typeof module === 'object' && module.exports) module.exports = api;
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else root.createTaskOverlayHistory = api;
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})(typeof globalThis !== 'undefined' ? globalThis : this, function () {
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'use strict';
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const allowed = new Set(['new', 'find', 'search', 'search-preview', 'plan-today', 'plan-today-preview', 'today-readiness']);
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return function createTaskOverlayHistory({ history, eventTarget, onChange }) {
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let active = allowed.has(history.state?.taskOverlay) ? history.state.taskOverlay : null;
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let started = false;
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function stateKind(state = history.state) {
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return allowed.has(state?.taskOverlay) ? state.taskOverlay : null;
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}
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function apply(state) {
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const next = stateKind(state);
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if (next === active) return;
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const previous = active;
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active = next;
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onChange(next, previous);
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}
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return {
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start() {
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if (started) return;
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started = true;
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eventTarget.addEventListener('popstate', event => apply(event.state));
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},
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open(kind) {
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if (!allowed.has(kind)) return false;
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if (active === kind) return true;
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const previous = active;
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const state = { ...(history.state || {}), taskOverlay: kind };
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history.pushState(state, '');
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active = kind;
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onChange(kind, previous);
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return true;
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},
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close() {
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if (!active) return false;
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history.back();
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return true;
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},
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leave() {
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if (!active) return false;
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const previous = active;
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const state = { ...(history.state || {}) };
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delete state.taskOverlay;
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history.replaceState(state, '');
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active = null;
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onChange(null, previous);
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return true;
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},
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current() { return active; },
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};
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};
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});
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