Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | 1x 12x 12x 20x 20x 15x 4x 15x 15x 15x 2x 13x 13x 13x 2x 13x 13x 26x 4x 13x 13x 13x 13x 13x 12x 12x 13x 11x 11x 11x 11x 11x 11x 10x 20x 10x 9x 9x 9x 9x 2x 2x 2x 2x 3x 1x 1x 2x 2x 9x 9x 2x 2x 7x 6x 5x 4x 4x 4x 4x 3x 1x 1x 1x 2x 2x 1x 1x 1x 1x 4x 4x 7x 7x 7x 7x 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.
import {
parseCards,
prependPages,
recordPage,
restoreFrom,
trackScroll,
} from "./infinite-scroll-history";
export type InfiniteScrollState = {
/** First page whose cards are in the DOM. */
firstPage: number;
currentPage: number;
totalPages: number;
loading: boolean;
done: boolean;
};
export const FETCH_TRIGGER_MARGIN = "600px";
export function readInitialState(root: HTMLElement): InfiniteScrollState {
const currentPage = parseInt(root.dataset.currentPage || "1", 10);
return {
firstPage: currentPage,
currentPage,
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;
}
const cards = parseCards(html);
for (const grid of grids) {
for (const card of cards) {
grid.appendChild(card.cloneNode(true));
}
}
state.currentPage = nextPage;
recordPage(state.firstPage, 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);
// Back to an entry left on page N: the server rendered page N alone, so put
// the pages before it back, then return to the saved offset.
const restore = restoreFrom(state.currentPage);
let restored: Promise<void> = Promise.resolve();
if (restore) {
state.firstPage = restore.first;
state.loading = true;
showLoading(loadingEl, true);
restored = prependPages(
restore.first,
state.currentPage - 1,
(p) => buildNextUrl(p, category),
grids,
)
.then(() => window.scrollTo(0, restore.y ?? 0))
.catch((err) =>
console.error("[rooms] restoring earlier pages failed", err),
)
.finally(() => {
state.loading = false;
showLoading(loadingEl, false);
});
}
void restored.then(trackScroll);
// Already on the last page: nothing to load. No end message either; it
// would appear at load and push the content below it (layout shift).
if (state.currentPage >= state.totalPages) {
state.done = true;
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);
// Re-check the sentinel once restored pages have pushed it down.
void restored.then(() => {
observer.unobserve(sentinel);
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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