1 files changed, 123 insertions, 0 deletions
diff --git a/packages/client/src/components/captcha.vue b/packages/client/src/components/captcha.vue
new file mode 100644
index 0000000000..baa922506e
--- /dev/null
+++ b/packages/client/src/components/captcha.vue
@@ -0,0 +1,123 @@
+<template>
+<div>
+	<span v-if="!available">{{ $ts.waiting }}<MkEllipsis/></span>
+	<div ref="captcha"></div>
+</div>
+</template>
+
+<script lang="ts">
+import { defineComponent, PropType } from 'vue';
+
+type Captcha = {
+	render(container: string | Node, options: {
+		readonly [_ in 'sitekey' | 'theme' | 'type' | 'size' | 'tabindex' | 'callback' | 'expired' | 'expired-callback' | 'error-callback' | 'endpoint']?: unknown;
+	}): string;
+	remove(id: string): void;
+	execute(id: string): void;
+	reset(id: string): void;
+	getResponse(id: string): string;
+};
+
+type CaptchaProvider = 'hcaptcha' | 'recaptcha';
+
+type CaptchaContainer = {
+	readonly [_ in CaptchaProvider]?: Captcha;
+};
+
+declare global {
+	interface Window extends CaptchaContainer {
+	}
+}
+
+export default defineComponent({
+	props: {
+		provider: {
+			type: String as PropType<CaptchaProvider>,
+			required: true,
+		},
+		sitekey: {
+			type: String,
+			required: true,
+		},
+		modelValue: {
+			type: String,
+		},
+	},
+
+	data() {
+		return {
+			available: false,
+		};
+	},
+
+	computed: {
+		variable(): string {
+			switch (this.provider) {
+				case 'hcaptcha': return 'hcaptcha';
+				case 'recaptcha': return 'grecaptcha';
+			}
+		},
+		loaded(): boolean {
+			return !!window[this.variable];
+		},
+		src(): string {
+			const endpoint = ({
+				hcaptcha: 'https://hcaptcha.com/1',
+				recaptcha: 'https://www.recaptcha.net/recaptcha',
+			} as Record<CaptchaProvider, string>)[this.provider];
+
+			return `${typeof endpoint === 'string' ? endpoint : 'about:invalid'}/api.js?render=explicit`;
+		},
+		captcha(): Captcha {
+			return window[this.variable] || {} as unknown as Captcha;
+		},
+	},
+
+	created() {
+		if (this.loaded) {
+			this.available = true;
+		} else {
+			(document.getElementById(this.provider) || document.head.appendChild(Object.assign(document.createElement('script'), {
+				async: true,
+				id: this.provider,
+				src: this.src,
+			})))
+				.addEventListener('load', () => this.available = true);
+		}
+	},
+
+	mounted() {
+		if (this.available) {
+			this.requestRender();
+		} else {
+			this.$watch('available', this.requestRender);
+		}
+	},
+
+	beforeUnmount() {
+		this.reset();
+	},
+
+	methods: {
+		reset() {
+			if (this.captcha?.reset) this.captcha.reset();
+		},
+		requestRender() {
+			if (this.captcha.render && this.$refs.captcha instanceof Element) {
+				this.captcha.render(this.$refs.captcha, {
+					sitekey: this.sitekey,
+					theme: this.$store.state.darkMode ? 'dark' : 'light',
+					callback: this.callback,
+					'expired-callback': this.callback,
+					'error-callback': this.callback,
+				});
+			} else {
+				setTimeout(this.requestRender.bind(this), 1);
+			}
+		},
+		callback(response?: string) {
+			this.$emit('update:modelValue', typeof response == 'string' ? response : null);
+		},
+	},
+});
+</script>