233 lines
7.7 KiB
Svelte
233 lines
7.7 KiB
Svelte
<script lang="ts">
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import { tick } from "svelte";
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import { goto } from "$app/navigation";
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import { searchThreads, type SearchResult } from "$lib/search";
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import { searchModal, openSearch, closeSearch } from "$lib/searchModal.svelte";
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let query = $state("");
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let results = $state<SearchResult[]>([]);
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let resultsQuery = $state(""); // The query that produced the current results
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let searching = $state(false);
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let activeIndex = $state(-1);
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let inputEl = $state<HTMLInputElement | null>(null);
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let timer: ReturnType<typeof setTimeout> | null = null;
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let seq = 0;
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const active = $derived(resultsQuery.trim().length >= 2);
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// Focus (and select, so a stale query is typed over) when the modal opens
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$effect(() => {
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if (searchModal.open)
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tick().then(() => {
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inputEl?.focus();
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inputEl?.select();
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});
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});
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function schedule() {
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const q = query.trim();
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if (timer) clearTimeout(timer);
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activeIndex = -1;
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if (q.length < 2) {
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seq++; // Supersede any in-flight query
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results = [];
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resultsQuery = "";
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searching = false;
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return;
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}
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searching = true;
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timer = setTimeout(async () => {
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const id = ++seq;
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try {
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const r = await searchThreads(q);
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if (id !== seq) return;
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results = r;
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resultsQuery = q;
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} finally {
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if (id === seq) searching = false;
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}
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}, 300);
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}
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function select(r: SearchResult) {
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closeSearch();
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goto(`/thread/${r.threadId}`);
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}
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function onInputKeydown(e: KeyboardEvent) {
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if (results.length === 0) return;
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if (e.key === "ArrowDown") {
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e.preventDefault();
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activeIndex = (activeIndex + 1) % results.length;
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} else if (e.key === "ArrowUp") {
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e.preventDefault();
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activeIndex = (activeIndex - 1 + results.length) % results.length;
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} else if (e.key === "Enter" && activeIndex >= 0) {
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e.preventDefault();
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select(results[activeIndex]);
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}
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}
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const terms = $derived(resultsQuery.split(/\s+/).filter((t) => t.length >= 2));
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function escapeRe(s: string): string {
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return s.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
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}
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// Split into alternating plain/matched segments for <mark> rendering
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function highlight(text: string): { text: string; hit: boolean }[] {
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if (!text || terms.length === 0) return [{ text, hit: false }];
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const alts = terms.map(escapeRe).join("|");
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const exact = new RegExp(`^(${alts})$`, "i");
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return text
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.split(new RegExp(`(${alts})`, "gi"))
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.filter((s) => s !== "")
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.map((s) => ({ text: s, hit: exact.test(s) }));
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}
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// Global "/" opens the search from any page, unless typing somewhere else
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function onWindowKeydown(e: KeyboardEvent) {
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if (searchModal.open) {
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if (e.key === "Escape") closeSearch();
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return;
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}
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if (e.key !== "/" || e.metaKey || e.ctrlKey || e.altKey) return;
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const t = e.target as HTMLElement | null;
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if (
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t &&
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(t.tagName === "INPUT" || t.tagName === "TEXTAREA" || t.isContentEditable)
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)
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return;
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e.preventDefault();
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openSearch();
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}
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</script>
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<svelte:window onkeydown={onWindowKeydown} />
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{#if searchModal.open}
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<div class="fixed inset-0 z-50 flex flex-col items-center px-4 pt-[12vh]">
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<button
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type="button"
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aria-label="Close search"
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class="absolute inset-0 bg-black/40"
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onclick={closeSearch}
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></button>
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<div
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class="relative w-full max-w-xl rounded-lg bg-white p-3 shadow-xl dark:bg-neutral-900"
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role="dialog"
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aria-modal="true"
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aria-label="Search"
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>
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<div class="relative">
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<svg
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xmlns="http://www.w3.org/2000/svg"
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class="pointer-events-none absolute top-1/2 left-4 h-5 w-5 -translate-y-1/2 text-neutral-400 dark:text-neutral-500"
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fill="none"
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viewBox="0 0 24 24"
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stroke="currentColor"
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stroke-width="2"
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aria-hidden="true"
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>
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<path
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stroke-linecap="round"
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stroke-linejoin="round"
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d="m21 21-5.197-5.197m0 0A7.5 7.5 0 1 0 5.196 5.196a7.5 7.5 0 0 0 10.607 10.607Z"
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/>
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</svg>
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<input
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bind:this={inputEl}
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bind:value={query}
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type="search"
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placeholder="Search"
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role="combobox"
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aria-expanded={active}
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aria-controls={active ? "search-results" : undefined}
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aria-activedescendant={activeIndex >= 0
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? `search-result-${activeIndex}`
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: undefined}
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aria-label="Search discussions"
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autocomplete="off"
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oninput={schedule}
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onkeydown={onInputKeydown}
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class="focus:ring-accent focus:dark:ring-accent w-full rounded border border-neutral-200 bg-neutral-100 py-2 pr-14 pl-11 text-neutral-800 placeholder-neutral-400 focus:bg-neutral-50 focus:ring-1 focus:outline-none dark:border-neutral-700 dark:bg-neutral-900 dark:text-neutral-200 dark:placeholder-neutral-500 focus:dark:bg-neutral-950"
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/>
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<kbd
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class="pointer-events-none absolute top-1/2 right-3 flex h-6 -translate-y-1/2 items-center justify-center rounded-md bg-neutral-200 px-1.5 font-sans text-xs text-neutral-500 dark:bg-neutral-700 dark:text-neutral-400"
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aria-hidden="true">esc</kbd
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>
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</div>
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{#if active || searching}
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<div
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id="search-results"
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role="listbox"
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aria-label="Search results"
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class="mt-3 max-h-[50vh] overflow-auto border-t border-neutral-100 pt-2 dark:border-neutral-800"
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>
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{#if searching}
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<div
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class="flex items-center gap-2 px-4 py-2 text-sm text-neutral-400 dark:text-neutral-500"
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aria-live="polite"
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>
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<span
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class="inline-block h-3 w-3 animate-spin rounded-full border border-neutral-300 border-t-neutral-600 dark:border-neutral-600"
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aria-hidden="true"
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></span>
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<span>Searching…</span>
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</div>
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{:else if results.length === 0}
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<div
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class="px-4 py-2 text-sm text-neutral-400 dark:text-neutral-500"
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>
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No results
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</div>
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{/if}
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{#snippet marked(text: string)}
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{#each highlight(text) as p}
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{#if p.hit}<mark
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class="bg-secondary/40 dark:bg-secondary/30 rounded-sm text-inherit"
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>{p.text}</mark
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>{:else}{p.text}{/if}
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{/each}
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{/snippet}
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{#each results as r, i (r.threadId)}
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<a
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id="search-result-{i}"
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href="/thread/{r.threadId}"
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role="option"
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aria-selected={i === activeIndex}
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class="block rounded px-4 py-2 {i === activeIndex
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? 'bg-neutral-100 dark:bg-neutral-800'
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: ''}"
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onmousedown={(e) => {
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e.preventDefault();
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select(r);
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}}
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onmouseenter={() => (activeIndex = i)}
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>
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<span
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class="block truncate font-medium text-neutral-800 dark:text-neutral-200"
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>
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{@render marked(r.title)}
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{#if r.matchKind === "reply"}
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<span
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class="ml-1 text-xs font-normal text-neutral-400 dark:text-neutral-500"
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>reply</span
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>
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{/if}
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</span>
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{#if r.snippet}
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<span
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class="block truncate text-sm text-neutral-500 dark:text-neutral-400"
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>
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{@render marked(r.snippet)}
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</span>
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{/if}
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</a>
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{/each}
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</div>
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{/if}
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</div>
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</div>
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{/if}
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