Add support for hCaptcha

src/client/components/hcaptcha.vue

@@ -0,0 +1,76 @@
+<template>
+	<div ref="hCaptcha"></div>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+
+declare global {
+	interface Window {
+		hcaptcha?: {
+			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;
+		};
+	}
+}
+
+export default Vue.extend({
+	props: {
+		sitekey: {
+			type: String,
+      required: true,
+		},
+		value: {
+			type: String,
+		},
+	},
+
+	data() {
+		return {
+			available: false,
+		};
+	},
+
+	created() {
+		if (window.hcaptcha) {
+			this.available = true;
+		} else {
+			const script = document.createElement('script');
+			script.addEventListener('load', () => this.available = true);
+			script.src = 'https://hcaptcha.com/1/api.js?render=explicit';
+			script.async = true;
+			document.head.appendChild(script);
+		}
+	},
+
+	mounted() {
+		if (this.available) {
+			this.render();
+		} else {
+			this.$watch('available', this.render);
+		}
+	},
+
+	methods: {
+		render() {
+			if (this.$refs.hCaptcha instanceof Element) {
+				window.hcaptcha!.render(this.$refs.hCaptcha, {
+					sitekey: this.sitekey,
+					theme: this.$store.state.device.darkMode ? 'dark' : 'light',
+					callback: this.callback,
+					'expired-callback': this.callback,
+					'error-callback': this.callback,
+				});
+			}
+		},
+		callback(response?: string) {
+			this.$emit('input', typeof response == 'string' ? response : null);
+		},
+	},
+});
+</script>