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const search = document.getElementById("search");
const nav = document.querySelectorAll("body > header > nav")[0];
const queryInput = document.getElementById("query");
let results = document.getElementById("results");
let pagination = document.getElementById("pagination");
const range = new Range();
range.setStartAfter(search);
range.setEndAfter(search.parentNode.lastChild);
let urlLocation = new URL(location);
let state = history.state || {
url: urlLocation.toString(),
input: urlLocation.searchParams.get("query"),
fragment: range.cloneContents().innerHTML || "",
opened: [],
};
let escapePolicy = null;
if (window.trustedTypes && trustedTypes.createPolicy) {
escapePolicy = trustedTypes.createPolicy("fetch", {
createHTML: (string) => string,
});
}
function detailsToggled(ev) {
const nextURL = new URL(location);
if (ev.newState == "open" || ev.target.open === true) {
state.opened.push(this.id);
nextURL.hash = this.id;
} else {
state.opened = state.opened.filter((x) => x != this.id);
nextURL.hash = "";
}
state.url = nextURL.toJSON();
history.replaceState(state, "", nextURL);
}
function addToggleEventListeners(results) {
results.querySelectorAll("details").forEach((details) =>
// toggle event doesn't bubble :(
details.addEventListener("toggle", detailsToggled, { passive: true }),
);
}
function paginationLinkClicked(ev) {
const url = new URL(ev.target.href);
getResults(url);
ev.preventDefault();
}
function addPaginationEventListeners(pagination) {
Array.from(pagination.children).forEach((child) =>
child.addEventListener("click", paginationLinkClicked),
);
}
function renderFragmentHTML(html) {
const fragment = range.createContextualFragment(
escapePolicy !== null ? escapePolicy.createHTML(html) : html,
);
results = fragment.querySelector("#results");
pagination = fragment.querySelector("#pagination");
range.deleteContents();
range.insertNode(fragment);
if (results !== null) {
addToggleEventListeners(results);
}
if (pagination !== null) {
addPaginationEventListeners(pagination);
}
}
async function getResults(url) {
try {
state.url = url.toJSON();
history.pushState(state, null, url);
const res = await fetch(url, {
headers: {
fetch: "true",
},
});
// render errors sent as HTML as well as OK responses
if (res.headers.get("content-type").startsWith("text/html")) {
state.fragment = await res.text();
state.opened = [];
history.replaceState(state, null, url);
renderFragmentHTML(state.fragment);
} else {
throw new Error(`${res.status} ${res.statusText}: ${await res.text()}`);
}
} catch (error) {
range.deleteContents();
range.insertNode(new Text(error.message));
console.error("fetch failed", error);
}
}
queryInput.addEventListener("input", function (ev) {
for (const el of nav.children) {
if (el.nodeName === "A") {
const url = new URL(el.href);
if (ev.target.value) {
url.searchParams.set("query", ev.target.value);
} else {
url.searchParams.delete("query");
}
el.href = url.toString();
}
}
});
search.addEventListener("submit", function (ev) {
const url = new URL(this.action);
const formData = new FormData(this);
url.search = new URLSearchParams(formData).toString();
state.input = formData.get("query");
getResults(url);
ev.preventDefault();
});
if (results !== null) {
addToggleEventListeners(results);
}
if (pagination !== null) {
addPaginationEventListeners(pagination);
}
if (state.opened.length > 0) {
state.opened.forEach((id) =>
document.getElementById(id).setAttribute("open", "open"),
);
} else if (location.hash) {
document.getElementById(location.hash.slice(1)).setAttribute("open", "open");
}
addEventListener("popstate", function (ev) {
if (ev.state != null) {
url = new URL(ev.state.url);
if (!url.pathname.endsWith("/search") && ev.state.fragment !== null) {
queryInput.value = ev.state.input;
renderFragmentHTML(ev.state.fragment);
return;
}
}
range.deleteContents();
search.reset();
});
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