67 lines
1.9 KiB
TypeScript
67 lines
1.9 KiB
TypeScript
import { useEffect } from "preact/hooks";
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export default function LandlordMessageSelection() {
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useEffect(() => {
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const container = document.querySelector<HTMLElement>(
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"[data-message-form]",
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);
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if (!container) return;
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const selectAll = container.querySelector<HTMLInputElement>(
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"[data-select-all]",
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);
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const deleteButton = container.querySelector<HTMLButtonElement>(
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"[data-delete-button]",
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);
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const checkboxes = Array.from(
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container.querySelectorAll<HTMLInputElement>("[data-message-checkbox]"),
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);
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const labelBase = "Delete selected";
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const updateState = () => {
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const checkedCount = checkboxes.filter((box) => box.checked).length;
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const totalCount = checkboxes.length;
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if (selectAll) {
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selectAll.indeterminate = checkedCount > 0 &&
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checkedCount < totalCount;
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selectAll.checked = totalCount > 0 && checkedCount === totalCount;
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}
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if (deleteButton) {
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deleteButton.disabled = checkedCount === 0;
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deleteButton.textContent = checkedCount > 0
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? `${labelBase} (${checkedCount})`
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: labelBase;
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}
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};
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const handleSelectAllChange = (event: Event) => {
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const target = event.target as HTMLInputElement | null;
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const nextChecked = Boolean(target?.checked);
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checkboxes.forEach((box) => {
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box.checked = nextChecked;
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});
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updateState();
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};
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const handleCheckboxChange = () => updateState();
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selectAll?.addEventListener("change", handleSelectAllChange);
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checkboxes.forEach((box) =>
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box.addEventListener("change", handleCheckboxChange)
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);
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updateState();
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return () => {
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selectAll?.removeEventListener("change", handleSelectAllChange);
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checkboxes.forEach((box) =>
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box.removeEventListener("change", handleCheckboxChange)
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);
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};
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}, []);
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return <span class="hidden" data-message-selection aria-hidden="true" />;
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}
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