feat: Add support for mCaptcha (#12905)

* feat: Add support for mCaptcha

* fix: Fix docker compose configuration

* chore(frontend/docs): update changelog & fix eslint errors

* `@mcaptcha/vanilla-glue`をダイナミックインポートするように

* chore: Add missing prefix to CHANGELOG

* refactor(backend): 適当につけた変数の名前を変更

packages/frontend/src/components/MkCaptcha.vue

@@ -6,12 +6,16 @@ SPDX-License-Identifier: AGPL-3.0-only
 <template>
 <div>
 	<span v-if="!available">{{ i18n.ts.waiting }}<MkEllipsis/></span>
-	<div ref="captchaEl"></div>
+	<div v-if="props.provider == 'mcaptcha'">
+		<div id="mcaptcha__widget-container" class="m-captcha-style"></div>
+		<div ref="captchaEl"></div>
+	</div>
+	<div v-else ref="captchaEl"></div>
 </div>
 </template>
 
 <script lang="ts" setup>
-import { ref, shallowRef, computed, onMounted, onBeforeUnmount, watch } from 'vue';
+import { ref, shallowRef, computed, onMounted, onBeforeUnmount, watch, onUnmounted } from 'vue';
 import { defaultStore } from '@/store.js';
 import { i18n } from '@/i18n.js';
 
@@ -26,7 +30,7 @@ export type Captcha = {
 	getResponse(id: string): string;
 };
 
-export type CaptchaProvider = 'hcaptcha' | 'recaptcha' | 'turnstile';
+export type CaptchaProvider = 'hcaptcha' | 'recaptcha' | 'turnstile' | 'mcaptcha';
 
 type CaptchaContainer = {
 	readonly [_ in CaptchaProvider]?: Captcha;
@@ -39,6 +43,7 @@ declare global {
 const props = defineProps<{
 	provider: CaptchaProvider;
 	sitekey: string | null; // null will show error on request
+	instanceUrl?: string | null;
 	modelValue?: string | null;
 }>();
 
@@ -55,6 +60,7 @@ const variable = computed(() => {
 		case 'hcaptcha': return 'hcaptcha';
 		case 'recaptcha': return 'grecaptcha';
 		case 'turnstile': return 'turnstile';
+		case 'mcaptcha': return 'mcaptcha';
 	}
 });
 
@@ -65,6 +71,7 @@ const src = computed(() => {
 		case 'hcaptcha': return 'https://js.hcaptcha.com/1/api.js?render=explicit&recaptchacompat=off';
 		case 'recaptcha': return 'https://www.recaptcha.net/recaptcha/api.js?render=explicit';
 		case 'turnstile': return 'https://challenges.cloudflare.com/turnstile/v0/api.js?render=explicit';
+		case 'mcaptcha': return null;
 	}
 });
 
@@ -72,9 +79,9 @@ const scriptId = computed(() => `script-${props.provider}`);
 
 const captcha = computed<Captcha>(() => window[variable.value] || {} as unknown as Captcha);
 
-if (loaded) {
+if (loaded || props.provider === 'mcaptcha') {
 	available.value = true;
-} else {
+} else if (src.value !== null) {
 	(document.getElementById(scriptId.value) ?? document.head.appendChild(Object.assign(document.createElement('script'), {
 		async: true,
 		id: scriptId.value,
@@ -87,7 +94,7 @@ function reset() {
 	if (captcha.value.reset) captcha.value.reset();
 }
 
-function requestRender() {
+async function requestRender() {
 	if (captcha.value.render && captchaEl.value instanceof Element) {
 		captcha.value.render(captchaEl.value, {
 			sitekey: props.sitekey,
@@ -96,6 +103,15 @@ function requestRender() {
 			'expired-callback': callback,
 			'error-callback': callback,
 		});
+	} else if (props.provider === 'mcaptcha' && props.instanceUrl && props.sitekey) {
+		const { default: Widget } = await import('@mcaptcha/vanilla-glue');
+		// @ts-expect-error avoid typecheck error
+		new Widget({
+			siteKey: {
+				instanceUrl: new URL(props.instanceUrl),
+				key: props.sitekey,
+			},
+		});
 	} else {
 		window.setTimeout(requestRender, 1);
 	}
@@ -105,14 +121,27 @@ function callback(response?: string) {
 	emit('update:modelValue', typeof response === 'string' ? response : null);
 }
 
+function onReceivedMessage(message: MessageEvent) {
+	if (message.data.token) {
+		if (props.instanceUrl && new URL(message.origin).host === new URL(props.instanceUrl).host) {
+			callback(<string>message.data.token);
+		}
+	}
+}
+
 onMounted(() => {
 	if (available.value) {
+		window.addEventListener('message', onReceivedMessage);
 		requestRender();
 	} else {
 		watch(available, requestRender);
 	}
 });
 
+onUnmounted(() => {
+	window.removeEventListener('message', onReceivedMessage);
+});
+
 onBeforeUnmount(() => {
 	reset();
 });