1 files changed, 147 insertions, 0 deletions
diff --git a/web/source/settings/lib/form/check-list.jsx b/web/source/settings/lib/form/check-list.jsx
new file mode 100644
index 000000000..c1233273d
--- /dev/null
+++ b/web/source/settings/lib/form/check-list.jsx
@@ -0,0 +1,147 @@
+/*
+	GoToSocial
+	Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+"use strict";
+
+const React = require("react");
+const syncpipe = require("syncpipe");
+
+function createState(entries, uniqueKey, oldState, defaultValue) {
+	return syncpipe(entries, [
+		(_) => _.map((entry) => {
+			let key = entry[uniqueKey];
+			return [
+				key,
+				{
+					...entry,
+					key,
+					checked: oldState[key]?.checked ?? entry.checked ?? defaultValue
+				}
+			];
+		}),
+		(_) => Object.fromEntries(_)
+	]);
+}
+
+function updateAllState(state, newValue) {
+	return syncpipe(state, [
+		(_) => Object.values(_),
+		(_) => _.map((entry) => [entry.key, {
+			...entry,
+			checked: newValue
+		}]),
+		(_) => Object.fromEntries(_)
+	]);
+}
+
+function updateState(state, key, newValue) {
+	return {
+		...state,
+		[key]: {
+			...state[key],
+			...newValue
+		}
+	};
+}
+
+module.exports = function useCheckListInput({ name }, { entries, uniqueKey = "key", defaultValue = false }) {
+	const [state, setState] = React.useState({});
+
+	const [someSelected, setSomeSelected] = React.useState(false);
+	const [toggleAllState, setToggleAllState] = React.useState(0);
+	const toggleAllRef = React.useRef(null);
+
+	React.useEffect(() => {
+		/* 
+			entries changed, update state,
+			re-using old state if available for key
+		*/
+		setState(createState(entries, uniqueKey, state, defaultValue));
+
+		/* eslint-disable-next-line react-hooks/exhaustive-deps */
+	}, [entries]);
+
+	React.useEffect(() => {
+		/* Updates (un)check all checkbox, based on shortcode checkboxes
+			 Can be 0 (not checked), 1 (checked) or 2 (indeterminate)
+		 */
+		if (toggleAllRef.current == null) {
+			return;
+		}
+
+		let values = Object.values(state);
+		/* one or more boxes are checked */
+		let some = values.some((v) => v.checked);
+
+		let all = false;
+		if (some) {
+			/* there's not at least one unchecked box */
+			all = !values.some((v) => v.checked == false);
+		}
+
+		setSomeSelected(some);
+
+		if (some && !all) {
+			setToggleAllState(2);
+			toggleAllRef.current.indeterminate = true;
+		} else {
+			setToggleAllState(all ? 1 : 0);
+			toggleAllRef.current.indeterminate = false;
+		}
+	}, [state, toggleAllRef]);
+
+	function toggleAll(e) {
+		let selectAll = e.target.checked;
+
+		if (toggleAllState == 2) { // indeterminate
+			selectAll = false;
+		}
+
+		setState(updateAllState(state, selectAll));
+		setToggleAllState(selectAll);
+	}
+
+	function reset() {
+		setState(updateAllState(state, defaultValue));
+	}
+
+	function selectedValues() {
+		return syncpipe(state, [
+			(_) => Object.values(_),
+			(_) => _.filter((entry) => entry.checked)
+		]);
+	}
+
+	return Object.assign([
+		state,
+		reset,
+		{ name }
+	], {
+		name,
+		value: state,
+		onChange: (key, newValue) => setState(updateState(state, key, newValue)),
+		selectedValues,
+		reset,
+		someSelected,
+		toggleAll: {
+			ref: toggleAllRef,
+			value: toggleAllState,
+			onChange: toggleAll
+		}
+	});
+};
+\ No newline at end of file