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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | 1x 10x 16x 16x 11x 5x 14x 14x 14x 2x 12x 12x 12x 2x 12x 1x 1x 3x 1x 2x 4x 12x 12x 11x 11x 10x 10x 11x 9x 9x 9x 9x 9x 9x 8x 16x 8x 7x 7x 1x 1x 1x 6x 6x 5x 4x 4x 4x 4x 3x 1x 1x 1x 2x 2x 1x 1x 1x 1x 4x 4x 6x 1x 1x 1x 1x | // Infinite-scroll for /rooms/[category]. Fetches server-rendered
// ProjectCard (variant="room-listing") HTML fragments and appends to both
// the mobile vertical grid and the desktop grid.
export type InfiniteScrollState = {
currentPage: number;
totalPages: number;
loading: boolean;
done: boolean;
};
export const FETCH_TRIGGER_MARGIN = "600px";
export function readInitialState(root: HTMLElement): InfiniteScrollState {
return {
currentPage: parseInt(root.dataset.currentPage || "1", 10),
totalPages: parseInt(root.dataset.totalPages || "1", 10),
loading: false,
done: false,
};
}
export function buildNextUrl(page: number, category: string): string {
const params = new URLSearchParams({ category, page: String(page) });
return `/api/rooms-fragment?${params.toString()}`;
}
export function showLoading(el: HTMLElement | null, visible: boolean) {
if (el) el.hidden = !visible;
}
export function showEndMessage(el: HTMLElement | null) {
if (el) el.hidden = false;
}
export async function fetchNextPage(
state: InfiniteScrollState,
grids: HTMLElement[],
category: string,
): Promise<boolean> {
const nextPage = state.currentPage + 1;
const res = await fetch(buildNextUrl(nextPage, category), {
headers: { Accept: "text/html" },
});
if (!res.ok) {
throw new Error(`fragment fetch failed: ${res.status}`);
}
const html = await res.text();
const totalPagesHeader = res.headers.get("X-Total-Pages");
if (totalPagesHeader) {
state.totalPages = parseInt(totalPagesHeader, 10) || state.totalPages;
}
if (html.trim()) {
const parsed = new DOMParser().parseFromString(html, "text/html");
const cards = Array.from(parsed.body.children).filter(
(el) =>
el.tagName !== "STYLE" &&
el.tagName !== "SCRIPT" &&
el.tagName !== "TEMPLATE",
) as HTMLElement[];
for (const grid of grids) {
for (const card of cards) {
grid.appendChild(card.cloneNode(true));
}
}
}
state.currentPage = nextPage;
return nextPage >= state.totalPages;
}
export function init() {
const root = document.querySelector<HTMLElement>(
"[data-rooms-infinite-scroll-root]",
);
if (!root || root.dataset.infiniteScrollInitialized) return;
root.dataset.infiniteScrollInitialized = "true";
const category = root.dataset.category ?? "";
if (!category) return;
const mobileGrid = root.querySelector<HTMLElement>(
'[data-rooms-grid="mobile"]',
);
const desktopGrid = document.querySelector<HTMLElement>(
'[data-rooms-grid="desktop"]',
);
const sentinel = document.querySelector<HTMLElement>(
"[data-rooms-sentinel]",
);
const loadingEl = document.querySelector<HTMLElement>(
"[data-rooms-loading]",
);
const endEl = document.querySelector<HTMLElement>("[data-rooms-end]");
if (!sentinel) return;
const grids = [mobileGrid, desktopGrid].filter(
(g): g is HTMLElement => g !== null,
);
if (grids.length === 0) return;
const state = readInitialState(root);
if (state.currentPage >= state.totalPages) {
state.done = true;
showEndMessage(endEl);
return;
}
const observer = new IntersectionObserver(
async (entries) => {
if (state.loading || state.done) return;
if (!entries.some((e) => e.isIntersecting)) return;
state.loading = true;
showLoading(loadingEl, true);
try {
const finished = await fetchNextPage(state, grids, category);
if (finished) {
state.done = true;
observer.disconnect();
showEndMessage(endEl);
} else {
observer.unobserve(sentinel);
observer.observe(sentinel);
}
} catch (err) {
console.error("[rooms] infinite scroll fetch failed", err);
state.done = true;
observer.disconnect();
showEndMessage(endEl);
} finally {
state.loading = false;
showLoading(loadingEl, false);
}
},
{ rootMargin: FETCH_TRIGGER_MARGIN, threshold: 0 },
);
observer.observe(sentinel);
}
/* istanbul ignore next -- auto-init guard */
Eif (typeof document !== "undefined") {
Iif (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", init, { once: true });
} else {
Iif (document.querySelector("[data-rooms-infinite-scroll-root]")) {
init();
}
}
document.addEventListener("astro:page-load", init);
}
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