toot-script-condivisione-su-mastodon/src/pages/index.astro

---
/*!
 * This file is part of Share₂Fedi
 * https://github.com/kytta/share2fedi
 *
 * SPDX-FileCopyrightText: © 2023 Nikita Karamov <me@kytta.dev>
 * SPDX-License-Identifier: AGPL-3.0-only
 */
import Layout from "@layouts/layout.astro";
import InstanceSelect from "@components/instance-select.astro";

import { getUrlDomain } from "@lib/url";
import type { Detection } from "./api/detect/[domain]";

const searchParameters = new URL(Astro.request.url).searchParams;
let text: string | null = searchParameters.get("text");
let instance: string | null = searchParameters.get("instance");

const errors = { text: "", instance: "" };
if (Astro.request.method === "POST") {
	const formData = await Astro.request.formData();
	text = formData.get("text") as string | null;
	instance = formData.get("instance") as string | null;

	if (typeof text !== "string" || text.length === 0) {
		errors.text += "Please enter post text. ";
	}

	let detection: Detection | undefined;
	if (typeof instance !== "string" || instance.length === 0) {
		errors.instance += "Please enter instance domain. ";
	} else {
		instance = getUrlDomain(instance);

		const detectResponse = await fetch(
			new URL(`/api/detect/${instance}`, Astro.url),
		);
		const detectJson = await detectResponse.json();
		if (detectJson.error) {
			errors.instance += detectJson.error + " ";
		} else {
			detection = detectJson;
		}
	}

	const hasErrors = Object.values(errors).some(Boolean);
	if (!hasErrors && detection !== undefined) {
		const { domain, endpoint, params } = detection;
		const publishUrl = new URL(endpoint, `https://${domain}/`);
		publishUrl.search = new URLSearchParams([
			[params.text, text as string],
		]).toString();
		// eslint-disable-next-line unicorn/prefer-module
		return Astro.redirect(publishUrl.toString(), 303);
	}
}
---

<Layout>
	<form
		id="form"
		method="POST"
	>
		<label>
			<span data-translate="postText">Post text</span>
			<textarea
				name="text"
				id="text"
				rows="7"
				placeholder="What’s on your mind?"
				required
				aria-invalid={Boolean(errors.text)}
				aria-errormessage={errors.text ? "text-error" : undefined}
				data-translate="postTextPlaceholder"
				data-translate-attribute="placeholder"
				>{text}</textarea
			>
			{
				errors.text && (
					<p
						class="error"
						id="text-error"
						aria-live="assertive"
					>
						{errors.text}
					</p>
				)
			}
		</label>

		<InstanceSelect
			{instance}
			errors={errors.instance}
		/>

		<input
			type="submit"
			value="Publish"
			class="mt1r"
			data-translate="publish"
			data-translate-attribute="value"
		/>
	</form>
</Layout>