feat: mention
This commit is contained in:
gosangam
@@ -0,0 +1,206 @@
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"use client";
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/**
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* MentionAutocomplete — a search input with a suggestions popover for tagging
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* users. Suggestions come from the backend prioritised (following → followers
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* → others), 20 per page, and the popover infinite-scrolls (≈5 rows visible).
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* Already-selected users are filtered out. Calls onSelect with the chosen
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* user; the caller manages the selected set.
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*/
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import { useEffect, useRef, useState } from "react";
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import Image from "next/image";
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import { Loader2, Search } from "lucide-react";
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import { posts, type UserSummary } from "@/lib/social";
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const PAGE = 20;
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export function MentionAutocomplete({
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excludeIds = [],
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onSelect,
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placeholder = "Search people to mention…",
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autoFocus = false,
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}: {
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excludeIds?: string[];
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onSelect: (user: UserSummary) => void;
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placeholder?: string;
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autoFocus?: boolean;
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}) {
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const [q, setQ] = useState("");
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const [open, setOpen] = useState(false);
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const [items, setItems] = useState<UserSummary[]>([]);
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const [loading, setLoading] = useState(false);
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const [hasMore, setHasMore] = useState(true);
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const reqRef = useRef(0);
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const busyRef = useRef(false);
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const rootRef = useRef<HTMLDivElement>(null);
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// (Re)load page 0 on open / query change (debounced — timer callback, so
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// setState isn't synchronous-in-effect).
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useEffect(() => {
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if (!open) return;
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const t = window.setTimeout(() => {
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const token = ++reqRef.current;
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busyRef.current = true;
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setLoading(true);
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posts
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.mentionSuggest(q, { limit: PAGE, offset: 0 })
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.then((res) => {
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if (reqRef.current !== token) return;
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setItems(res);
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setHasMore(res.length === PAGE);
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})
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.catch(() => {
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if (reqRef.current === token) {
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setItems([]);
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setHasMore(false);
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}
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})
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.finally(() => {
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if (reqRef.current === token) {
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setLoading(false);
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busyRef.current = false;
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}
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});
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}, 200);
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return () => window.clearTimeout(t);
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}, [q, open]);
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function loadMore() {
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if (busyRef.current || !hasMore) return;
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const token = reqRef.current;
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busyRef.current = true;
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setLoading(true);
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posts
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.mentionSuggest(q, { limit: PAGE, offset: items.length })
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.then((res) => {
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if (reqRef.current !== token) return;
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setItems((prev) => [...prev, ...res]);
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setHasMore(res.length === PAGE);
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})
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.catch(() => {})
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.finally(() => {
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if (reqRef.current === token) {
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setLoading(false);
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busyRef.current = false;
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}
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});
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}
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// Close on outside click / Escape.
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useEffect(() => {
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if (!open) return;
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function onDown(e: PointerEvent) {
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if (rootRef.current && !rootRef.current.contains(e.target as Node)) {
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setOpen(false);
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}
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}
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function onKey(e: KeyboardEvent) {
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if (e.key === "Escape") setOpen(false);
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}
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document.addEventListener("pointerdown", onDown);
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document.addEventListener("keydown", onKey);
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return () => {
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document.removeEventListener("pointerdown", onDown);
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document.removeEventListener("keydown", onKey);
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};
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}, [open]);
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const excluded = new Set(excludeIds);
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const visible = items.filter((u) => !u.id || !excluded.has(u.id));
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return (
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<div ref={rootRef} className="relative">
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<div className="relative">
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<Search className="pointer-events-none absolute left-3 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
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<input
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type="text"
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value={q}
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autoFocus={autoFocus}
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onFocus={() => setOpen(true)}
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onChange={(e) => {
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setQ(e.target.value);
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setOpen(true);
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}}
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placeholder={placeholder}
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autoComplete="off"
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className="w-full rounded-lg border border-border bg-background py-2 pl-9 pr-3 text-sm text-foreground outline-none placeholder:text-muted-foreground focus-visible:ring-2 focus-visible:ring-ring"
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/>
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</div>
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{open ? (
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<div
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onScroll={(e) => {
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const el = e.currentTarget;
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if (el.scrollHeight - el.scrollTop - el.clientHeight < 80) {
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loadMore();
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}
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}}
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className="absolute z-50 mt-1 max-h-60 w-full overflow-y-auto overscroll-contain rounded-lg border border-border bg-card shadow-lg"
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>
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{visible.length === 0 && !loading ? (
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<p className="px-3 py-3 text-sm text-muted-foreground">
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{q.trim() ? "No people found." : "No suggestions."}
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</p>
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) : (
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visible.map((u) => (
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<button
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key={u.id ?? u.handle}
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type="button"
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onMouseDown={(e) => e.preventDefault()} // keep input focused
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onClick={() => {
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onSelect(u);
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setQ("");
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}}
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className="flex w-full items-center gap-2.5 px-3 py-2 text-left transition-colors hover:bg-muted/60"
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>
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<RowAvatar src={u.avatar_url} name={u.name} />
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<span className="min-w-0">
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<span className="block truncate text-sm font-medium text-foreground">
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{u.name}
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</span>
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<span className="block truncate text-xs text-muted-foreground">
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@{u.handle}
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</span>
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</span>
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</button>
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))
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)}
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{loading ? (
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<div className="flex justify-center py-2">
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<Loader2 className="size-4 animate-spin text-muted-foreground" />
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</div>
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) : null}
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</div>
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) : null}
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</div>
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);
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}
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function RowAvatar({ src, name }: { src: string | null; name: string }) {
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if (src) {
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return (
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<Image
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src={src}
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alt={name}
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width={32}
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height={32}
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className="size-8 shrink-0 rounded-full object-cover ring-1 ring-foreground/10"
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unoptimized
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/>
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);
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}
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const initials =
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name
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.split(/\s+/)
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.map((p) => p[0])
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.slice(0, 2)
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.join("")
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.toUpperCase() || "?";
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return (
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<span className="flex size-8 shrink-0 items-center justify-center rounded-full bg-primary/15 text-xs font-semibold text-primary ring-1 ring-foreground/10">
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{initials}
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</span>
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);
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}
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