Optional terms of use dialog for user

.gitignore

@@ -1,2 +1,3 @@
 /node_modules
 /build
+.vscode

src/components/Header.tsx

@@ -16,6 +16,7 @@ import { availableHotkeys } from "../configs/hotkeysConfig";
 import { studioURL } from "../configs/generalConfig";
 import { hasAccess } from "../utils/utils";
 import RegistrationModal from "./shared/RegistrationModal";
+import TermsOfUseModal from "./shared/TermsOfUseModal";
 import HotKeyCheatSheet from "./shared/HotKeyCheatSheet";
 import { useHotkeys } from "react-hotkeys-hook";
 import { useAppDispatch, useAppSelector } from "../store";
@@ -63,6 +64,7 @@ const Header = ({
 	const errorCounter = useAppSelector(state => getErrorCount(state));
 	const user = useAppSelector(state => getUserInformation(state));
 	const orgProperties = useAppSelector(state => getOrgProperties(state));
+	const displayTerms = (orgProperties['org.opencastproject.admin.display_terms'] || 'false').toLowerCase() === 'true';
 
 	const loadHealthStatus = async () => {
 		await dispatch(fetchHealthStatus());
@@ -284,6 +286,9 @@ const Header = ({
 				<RegistrationModal close={hideRegistrationModal} />
 			)}
 
+			{/* Terms of use */}
+			{displayTerms && <TermsOfUseModal />}
+
 			{/* Hotkey Cheat Sheet */}
 			{displayHotKeyCheatSheet && (
 				<HotKeyCheatSheet close={hideHotKeyCheatSheet} />

src/components/shared/TermsOfUseModal.tsx

@@ -0,0 +1,155 @@
+import React, { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
+import { Field, Formik } from "formik";
+import cn from "classnames";
+import axios from "axios";
+import i18n from "../../i18n/i18n";
+import DOMPurify from "dompurify";
+
+
+const TermsOfUseModal = () => {
+	const { t } = useTranslation();
+	const initialValues = {};
+	const [termsContent, setTermsContent] = useState<string>("");
+	const [agreedToTerms, setAgreedToTerms] = useState(true);
+
+	// Check if already accepted terms
+	useEffect(() => {
+		const checkTerms = async () => {
+		  try {
+			const response = await axios.get("/admin-ng/user-settings/settings.json");
+			// @ts-expect-error TS(7006): Parameter 'result' implicitly has an 'any' type.
+			const isAgreed = response.data.results.some(result => result.key === "agreedToTerms" && result.value === "true");
+			setAgreedToTerms(isAgreed);
+		  } catch (error) {
+			console.error("Fehler beim Abrufen der Daten:", error);
+			setAgreedToTerms(false);
+		  }
+		};
+
+		checkTerms();
+	}, []);
+
+	// Fetch terms
+	useEffect(() => {
+		const getURL = (language: string) => {
+			return `ui/config/admin-ui/terms.${language}.html`;
+		};
+
+		axios.get(getURL(i18n.language))
+			.then(response => {
+				setTermsContent(response.data);
+			})
+			.catch(error => {
+				axios.get(getURL(typeof i18n.options.fallbackLng === 'string' ? i18n.options.fallbackLng : 'en-US'))
+					.then(response => {
+						setTermsContent(response.data);
+					})
+					.catch(error => {
+						console.error('Error while fetching data:', error);
+						setTermsContent(t("TERMS.NOCONTENT").toString());
+					});
+			});
+	// eslint-disable-next-line react-hooks/exhaustive-deps
+	}, [agreedToTerms]); // Listen to changes in agreedToTerms
+
+	// Set terms to user settings
+	// @ts-expect-error TS(7006): Parameter 'values' implicitly has an 'any' type.
+	const handleSubmit = async (values) => {
+		let body = new URLSearchParams();
+		body.append("key", "agreedToTerms");
+		body.append("value", values.agreedToTerms);
+
+		await axios.post("/admin-ng/user-settings/setting", body, {
+			headers: {
+				"Content-Type": "application/x-www-form-urlencoded",
+			},
+		});
+		setAgreedToTerms(true);
+	};
+
+	// If already accepted terms, dont display anything
+	if (agreedToTerms) {
+		return null;
+	}
+
+	// Else display terms
+	return (
+		<>
+			<div className="modal-animation modal-overlay" />
+			<section id="registration-modal" className="modal active modal-open modal-animation">
+				<header>
+					<h2>{t("TERMS.TITLE")}</h2>
+				</header>
+
+				<div className="modal-content" style={{ display: "block" }}>
+					<div className="modal-body">
+						<div>
+							<div className="row">
+								<div className="scrollbox">
+									<div dangerouslySetInnerHTML={{ __html: DOMPurify.sanitize(termsContent) }} ></div>
+								</div>
+							</div>
+						</div>
+					</div>
+				</div>
+
+				<Formik
+					initialValues={initialValues}
+					enableReinitialize
+					onSubmit={(values) => handleSubmit(values)}
+				>
+					{(formik) => (
+						<>
+						<div className="modal-content" style={{ display: "block" }}>
+							<div className="modal-body">
+								<div>
+									<fieldset>
+										<legend>{t("TERMS.TITLE")}</legend>
+										<div className="form-group form-group-checkbox">
+											<Field
+												type="checkbox"
+												name="agreedToTerms"
+												id="agreedToTerms"
+												className="form-control"
+											/>
+											<label htmlFor="agreedToTerms">
+												<span>{t("TERMS.AGREE")}</span>
+											</label>
+										</div>
+									</fieldset>
+								</div>
+							</div>
+						</div>
+
+						<footer>
+							<div className="pull-right">
+								<button
+									disabled={
+										// @ts-expect-error TS(2339): Property 'agreedToTerms' does not exist on type '... Remove this comment to see the full error message
+										!(formik.isValid && formik.values.agreedToTerms)
+									}
+									onClick={() => formik.handleSubmit()}
+									className={cn("submit", {
+										active:
+											// @ts-expect-error TS(2339): Property 'agreedToTerms' does not exist on type '... Remove this comment to see the full error message
+											formik.isValid && formik.values.agreedToTerms,
+										inactive: !(
+											// @ts-expect-error TS(2339): Property 'agreedToTerms' does not exist on type '... Remove this comment to see the full error message
+											formik.isValid && formik.values.agreedToTerms
+										),
+									})}
+								>
+									Submit
+								</button>
+							</div>
+						</footer>
+						</>
+					)}
+				</Formik>
+			</section>
+		</>
+	);
+};
+
+export default TermsOfUseModal;

src/i18n/org/opencastproject/adminui/languages/lang-en_US.json

@@ -2178,5 +2178,10 @@
 		"IMPRINT": "Imprint",
 		"PRIVACY": "Privacy statement",
 		"NOCONTENT": "Content not available"
+	},
+	"TERMS": {
+		"TITLE": "Terms of use",
+		"NOCONTENT": "Content not available",
+		"AGREE": "I have read and agree to the terms of use"
 	}
 }