Method getFilterOptions

src/services/FilterService.ts:479–511

* Get available filter options for building filter UI * Uses event-driven caching; TaskManager's filter indexes make recomputation cheap.

()

	 * Uses event-driven caching; TaskManager's filter indexes make recomputation cheap.
	 */
	async getFilterOptions(): Promise<FilterOptions> {
		const now = Date.now();

		// Return cached options if valid and not expired by fallback TTL
		if (
			this.filterOptionsCache &&
			now - this.filterOptionsCacheTimestamp < this.filterOptionsCacheTTL
		) {
			this.filterOptionsCacheHits++;
			return this.filterOptionsCache;
		}

		// Cache miss - compute fresh options

		const freshOptions = buildFilterOptions({
			statuses: this.statusManager.getAllStatuses(),
			priorities: this.priorityManager.getAllPriorities(),
			contexts: this.cacheManager.getAllContexts(),
			projects: this.cacheManager.getAllProjects(),
			tags: this.cacheManager.getAllTags(),
			taskPaths: this.cacheManager.getAllTaskPaths(),
			rootFolderLabel: this.translate("services.filter.folders.root", "(Root)"),
			userFields: this.runtime?.settings?.userFields || [],
		});

		this.filterOptionsComputeCount++;

		// Update cache and timestamp
		this.filterOptionsCache = freshOptions;
		this.filterOptionsCacheTimestamp = now;

		return freshOptions;
	}

	/**
	 * Invalidate cached filter options after an indexed field changes.