site.ts

1import { createHash } from "node:crypto";2import { mkdirSync, rmSync, writeFileSync } from "node:fs";3import { join } from "node:path";4import type { Context, Hono } from "hono";5import { isSafePath } from "../bucket/repo.ts";6import { applyHidden, openMirror } from "../mirror/store.ts";7import { supportText } from "../pages/docs.ts";8import { html } from "../pages/html.ts";9import { hiddenPaths, ignoredNames, setting } from "../server/db.ts";10import { type AdminContext, adminPage, formField, notice, textFields } from "./console.ts";11import { allRepos, saveSettings } from "./store.ts";1213// The settings Phase 6's pages read, with their labels and length caps.14const FIELDS: [key: string, label: string, max: number][] = [15	["site_name", "site name", 100],16	["tagline", "tagline", 300],17	["branding", "branding text", 100],18	["handle", "handle", 39],19	["bio", "bio", 2000],20	["location", "location", 100],21	["link", "link", 500],22	["building_since", "building since", 100],23	["support_page", "support page (Markdown)", 4000],24];25const TEXTAREAS = new Set(["bio", "support_page"]);26const PROFILE_FIELDS = new Set(["handle", "bio", "location", "link", "building_since"]);27const HANDLE = /^[A-Za-z0-9._-]+$/;28const HTTP_URL = /^https?:\/\/[^\s]+$/i;29// Under the 64 KiB body cap with room for the form's other fields; the docs promise 60 KB.30const MAX_SIGNATURE = 60 * 1024;31const OWN_SIGNATURE = /^signature-[0-9a-f]{16}\.(png|jpg|webp)$/;32const MAX_IGNORED = 50;33const MAX_IGNORED_NAME = 255;3435/**36 * The signature's type, from its first bytes, never its name or declared type. PNG, JPEG and WebP37 * only: SVG is refused, since it can carry script and links and would need a sandbox of its own.38 */39function imageType(bytes: Uint8Array): "png" | "jpg" | "webp" | null {40	const starts = (sig: number[], at = 0) => sig.every((byte, i) => bytes[at + i] === byte);41	if (starts([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])) return "png";42	if (starts([0xff, 0xd8, 0xff])) return "jpg";43	if (starts([0x52, 0x49, 0x46, 0x46]) && starts([0x57, 0x45, 0x42, 0x50], 8)) return "webp";44	return null;45}4647/** §24's Site and profile section, with the signature image stored under `data/assets/` (§19). */48export function registerSite(app: Hono, ctx: AdminContext): void {49	const assets = join(ctx.dataDir, "assets");50	app.get("/admin/site", (c) => c.html(sitePage(c, ctx, "")));5152	app.post("/admin/site", async (c) => {53		const fields = await textFields(c);54		const section = fields.section;55		if (section && section !== "profile" && section !== "site")56			return c.text("Unknown section.", 400);57		const refuse = (error: string) => c.html(sitePage(c, ctx, error, fields), 400);58		const values: Record<string, string> = {};59		for (const [key, label, max] of FIELDS) {60			if (section && PROFILE_FIELDS.has(key) !== (section === "profile")) continue;61			values[key] = (fields[key] ?? "").trim();62			if (values[key].length > max) return refuse(`The ${label} is over ${max} characters.`);63		}64		if (values.handle && !HANDLE.test(values.handle)) {65			return refuse("A handle is letters, digits, '.', '_' and '-'.");66		}67		// Shown by default: the setting records only that it was switched off.68		if (section !== "profile") values.support_off = fields.support === "1" ? "" : "1";69		const ignored = [70			...new Set(71				(fields.ignored ?? "")72					.split(/\r?\n/)73					.map((name) => name.trim())74					.filter(Boolean),75			),76		];77		if (ignored.length > MAX_IGNORED) return refuse(`Up to ${MAX_IGNORED} ignored names.`);78		const bad = ignored.find(79			(name) => name.length > MAX_IGNORED_NAME || name.includes("/") || !isSafePath(name),80		);81		if (bad !== undefined) return refuse(`"${bad}" is not a file or folder name.`);82		const previousIgnored = ignoredNames(ctx.kepr);83		if (section !== "profile") values.ignored = ignored.join("\n");84		if (values.link && !HTTP_URL.test(values.link)) {85			return refuse("The link must be an http or https address.");86		}87		const upload = (await c.req.parseBody()).signature;88		const previous = setting(ctx.kepr, "signature");89		if (90			section === "site" &&91			((upload instanceof File && upload.size > 0) || fields.remove_signature === "1")92		)93			return refuse("Edit your signature in profile settings.");94		if (upload instanceof File && upload.size > MAX_SIGNATURE) {95			return refuse("The signature must be under 60 KB.");96		}97		if (upload instanceof File && upload.size > 0) {98			const bytes = new Uint8Array(await upload.arrayBuffer());99			const type = imageType(bytes);100			if (!type) return refuse("The signature must be a PNG, JPEG or WebP image.");101			// Named by content, so the hour-long /static cache never serves an old signature.102			const hash = createHash("sha256").update(bytes).digest("hex").slice(0, 16);103			values.signature = `signature-${hash}.${type}`;104			mkdirSync(assets, { recursive: true });105			writeFileSync(join(assets, values.signature), bytes);106		} else if (fields.remove_signature === "1") {107			values.signature = "";108		}109		saveSettings(ctx.kepr, values);110		// Only a file this console wrote is removed, whatever the setting holds.111		if (112			previous &&113			OWN_SIGNATURE.test(previous) &&114			values.signature !== undefined &&115			previous !== values.signature116		) {117			rmSync(join(assets, previous), { force: true });118		}119		if (values.ignored !== undefined && values.ignored !== previousIgnored.join("\n")) {120			for (const { name } of allRepos(ctx.kepr)) {121				applyHidden(openMirror(ctx.mirrorDir, name), hiddenPaths(ctx.kepr, name));122			}123		}124		return c.redirect(`/admin/site?${section === "profile" ? "section=profile&" : ""}saved=1`, 303);125	});126}127128function sitePage(129	c: Context,130	ctx: AdminContext,131	error: string,132	fields?: Record<string, string>,133): string {134	const profile = (fields?.section ?? c.req.query("section")) === "profile";135	// The support page's box starts from the words it shows today.136	const value = (key: string) =>137		fields138			? (fields[key] ?? "")139			: key === "support_page"140				? supportText(ctx.kepr)141				: (setting(ctx.kepr, key) ?? "");142	const input = ([key, label, max]: (typeof FIELDS)[number]) =>143		html`<label class="issues-label" for="${key}">${label}</label>144${145	TEXTAREAS.has(key)146		? html`<textarea class="issues-textarea" id="${key}" name="${key}" rows="${key === "bio" ? 4 : 12}"147maxlength="${max}">${value(key)}</textarea>`148		: html`<input class="issues-input" id="${key}" name="${key}" maxlength="${max}"149value="${value(key)}">`150}`;151	const body = html`${notice(error)}152<p class="admin-intro">${profile ? "Your public profile brings your work together. A handle gives it an address beginning with @." : "The name and words visitors see across your site."}</p>153${profile && setting(ctx.kepr, "handle") && html`<p><a href="/@${setting(ctx.kepr, "handle")}">view profile ↗</a></p>`}154<form class="issues-form" method="post" action="/admin/site" enctype="multipart/form-data">155${formField(c)}156<input type="hidden" name="section" value="${profile ? "profile" : "site"}">157${FIELDS.filter(([key]) => PROFILE_FIELDS.has(key) === profile).map(input)}158${159	!profile &&160	html`161<label class="issues-label"><input type="checkbox" name="support" value="1"${162		(fields ? fields.support === "1" : !setting(ctx.kepr, "support_off")) && " checked"163	}>164show the support page</label>165<label class="issues-label" for="ignored">ignored in every repo</label>166<p class="admin-intro">One file or folder name per line, such as .agent or AGENTS.md: hidden at167any depth in every repo, from pages and tarballs. Applied after any sync under way.</p>168<textarea class="issues-textarea mono" id="ignored" name="ignored" rows="4">${169		fields ? (fields.ignored ?? "") : ignoredNames(ctx.kepr).join("\n")170	}</textarea>`171}172<button class="issues-submit" type="submit">save ${profile ? "profile" : "site"}</button>173</form>`;174	return adminPage(c, ctx, profile ? "profile" : "site", body);175}