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 { supportText } from "../pages/docs.ts";7import { html } from "../pages/html.ts";8import { ignoredNames, setting } from "../server/db.ts";9import { type AdminContext, adminPage, formField, notice, textFields } from "./console.ts";10import { allRepos, saveSettings } from "./store.ts";1112// The settings Phase 6's pages read, with their labels and length caps.13const FIELDS: [key: string, label: string, max: number][] = [14	["site_name", "site name", 100],15	["tagline", "tagline", 300],16	["branding", "branding text", 100],17	["handle", "handle", 39],18	["bio", "bio", 2000],19	["location", "location", 100],20	["link", "link", 500],21	["building_since", "building since", 100],22	["support_page", "support page (Markdown)", 4000],23];24const TEXTAREAS = new Set(["bio", "support_page"]);25const PROFILE_FIELDS = new Set(["handle", "bio", "location", "link", "building_since"]);26const HANDLE = /^[A-Za-z0-9._-]+$/;27const HTTP_URL = /^https?:\/\/[^\s]+$/i;28// Under the 64 KiB body cap with room for the form's other fields; the docs promise 60 KB.29const MAX_SIGNATURE = 60 * 1024;30const OWN_SIGNATURE = /^signature-[0-9a-f]{16}\.(png|jpg|webp)$/;31const MAX_IGNORED = 50;32const MAX_IGNORED_NAME = 255;3334/**35 * The signature's type, from its first bytes, never its name or declared type. PNG, JPEG and WebP36 * only: SVG is refused, since it can carry script and links and would need a sandbox of its own.37 */38function imageType(bytes: Uint8Array): "png" | "jpg" | "webp" | null {39	const starts = (sig: number[], at = 0) => sig.every((byte, i) => bytes[at + i] === byte);40	if (starts([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])) return "png";41	if (starts([0xff, 0xd8, 0xff])) return "jpg";42	if (starts([0x52, 0x49, 0x46, 0x46]) && starts([0x57, 0x45, 0x42, 0x50], 8)) return "webp";43	return null;44}4546/** §24's Site and profile section, with the signature image stored under `data/assets/` (§19). */47export function registerSite(app: Hono, ctx: AdminContext): void {48	const assets = join(ctx.dataDir, "assets");49	app.get("/admin/site", (c) => c.html(sitePage(c, ctx, "")));5051	app.post("/admin/site", async (c) => {52		const fields = await textFields(c);53		const section = fields.section;54		if (section && section !== "profile" && section !== "site")55			return c.text("Unknown section.", 400);56		const refuse = (error: string) => c.html(sitePage(c, ctx, error, fields), 400);57		const values: Record<string, string> = {};58		for (const [key, label, max] of FIELDS) {59			if (section && PROFILE_FIELDS.has(key) !== (section === "profile")) continue;60			values[key] = (fields[key] ?? "").trim();61			if (values[key].length > max) return refuse(`The ${label} is over ${max} characters.`);62		}63		if (values.handle && !HANDLE.test(values.handle)) {64			return refuse("A handle is letters, digits, '.', '_' and '-'.");65		}66		// Shown by default: the setting records only that it was switched off.67		if (section !== "profile") values.support_off = fields.support === "1" ? "" : "1";68		const ignored = [69			...new Set(70				(fields.ignored ?? "")71					.split(/\r?\n/)72					.map((name) => name.trim())73					.filter(Boolean),74			),75		];76		if (ignored.length > MAX_IGNORED) return refuse(`Up to ${MAX_IGNORED} ignored names.`);77		const bad = ignored.find(78			(name) => name.length > MAX_IGNORED_NAME || name.includes("/") || !isSafePath(name),79		);80		if (bad !== undefined) return refuse(`"${bad}" is not a file or folder name.`);81		const previousIgnored = ignoredNames(ctx.kepr);82		if (section !== "profile") values.ignored = ignored.join("\n");83		if (values.link && !HTTP_URL.test(values.link)) {84			return refuse("The link must be an http or https address.");85		}86		const upload = (await c.req.parseBody()).signature;87		const previous = setting(ctx.kepr, "signature");88		if (89			section === "site" &&90			((upload instanceof File && upload.size > 0) || fields.remove_signature === "1")91		)92			return refuse("Edit your signature in profile settings.");93		if (upload instanceof File && upload.size > MAX_SIGNATURE) {94			return refuse("The signature must be under 60 KB.");95		}96		if (upload instanceof File && upload.size > 0) {97			const bytes = new Uint8Array(await upload.arrayBuffer());98			const type = imageType(bytes);99			if (!type) return refuse("The signature must be a PNG, JPEG or WebP image.");100			// Named by content, so the hour-long /static cache never serves an old signature.101			const hash = createHash("sha256").update(bytes).digest("hex").slice(0, 16);102			values.signature = `signature-${hash}.${type}`;103			mkdirSync(assets, { recursive: true });104			writeFileSync(join(assets, values.signature), bytes);105		} else if (fields.remove_signature === "1") {106			values.signature = "";107		}108		saveSettings(ctx.kepr, values);109		// Only a file this console wrote is removed, whatever the setting holds.110		if (111			previous &&112			OWN_SIGNATURE.test(previous) &&113			values.signature !== undefined &&114			previous !== values.signature115		) {116			rmSync(join(assets, previous), { force: true });117		}118		if (values.ignored !== undefined && values.ignored !== previousIgnored.join("\n")) {119			await ctx.syncer.applyHidden(allRepos(ctx.kepr).map((repo) => repo.name));120		}121		return c.redirect(`/admin/site?${section === "profile" ? "section=profile&" : ""}saved=1`, 303);122	});123}124125function sitePage(126	c: Context,127	ctx: AdminContext,128	error: string,129	fields?: Record<string, string>,130): string {131	const profile = (fields?.section ?? c.req.query("section")) === "profile";132	// The support page's box starts from the words it shows today.133	const value = (key: string) =>134		fields135			? (fields[key] ?? "")136			: key === "support_page"137				? supportText(ctx.kepr)138				: (setting(ctx.kepr, key) ?? "");139	const input = ([key, label, max]: (typeof FIELDS)[number]) =>140		html`<label class="issues-label" for="${key}">${label}</label>141${142	TEXTAREAS.has(key)143		? html`<textarea class="issues-textarea" id="${key}" name="${key}" rows="${key === "bio" ? 4 : 12}"144maxlength="${max}">${value(key)}</textarea>`145		: html`<input class="issues-input" id="${key}" name="${key}" maxlength="${max}"146value="${value(key)}">`147}`;148	const body = html`${notice(error)}149<p class="admin-intro">${profile ? "Your public profile brings your work together. A handle gives it an address beginning with @." : "The name and words visitors see across your site."}</p>150${profile && setting(ctx.kepr, "handle") && html`<p><a href="/@${setting(ctx.kepr, "handle")}">view profile ↗</a></p>`}151<form class="issues-form" method="post" action="/admin/site" enctype="multipart/form-data">152${formField(c)}153<input type="hidden" name="section" value="${profile ? "profile" : "site"}">154${FIELDS.filter(([key]) => PROFILE_FIELDS.has(key) === profile).map(input)}155${156	!profile &&157	html`158<label class="issues-label"><input type="checkbox" name="support" value="1"${159		(fields ? fields.support === "1" : !setting(ctx.kepr, "support_off")) && " checked"160	}>161show the support page</label>162<label class="issues-label" for="ignored">ignored in every repo</label>163<p class="admin-intro">One file or folder name per line, such as .agent or AGENTS.md: hidden at164any depth in every repo, from pages and tarballs. Applied after any sync under way.</p>165<textarea class="issues-textarea mono" id="ignored" name="ignored" rows="4">${166		fields ? (fields.ignored ?? "") : ignoredNames(ctx.kepr).join("\n")167	}</textarea>`168}169<button class="issues-submit" type="submit">save ${profile ? "profile" : "site"}</button>170</form>`;171	return adminPage(c, ctx, profile ? "profile" : "site", body);172}