Function folderDropHandler

public/js/fileDragDrop.js:279–466

(event)

}

export async function folderDropHandler(event) {
  event.preventDefault();
  event.currentTarget.classList.remove('drop-hover');

  const dropFolder =
    event.currentTarget.getAttribute('data-folder') ||
    event.currentTarget.getAttribute('data-dest-folder') ||
    'root';

  let dragData = null;
  try {
    const raw = event.dataTransfer.getData('application/json') || '{}';
    dragData = JSON.parse(raw);
  } catch (e) {
    dragData = null;
  }

  if (!dragData) {
    showToast(t('invalid_drag_data'));
    return;
  }

  // ---------------------------
  // 1) FOLDER → FOLDER MOVE
  // ---------------------------
  if (dragData.dragType === 'folder' && dragData.folder) {
    const source = String(dragData.folder);
    const destination = dropFolder || 'root';
    const sourceId = String(dragData.sourceId || dragData.sourceSourceId || '').trim();
    const destSourceId = getPaneSourceIdForElement(event.currentTarget) || getActiveSourceId();
    const crossSource = sourceId && destSourceId && sourceId !== destSourceId;

    // quick no-op: same parent as before
    const oldParent = parentFolderOf(source);
    if (!crossSource && destination === oldParent) {
      showToast(t('source_dest_same'));
      return;
    }

    // optional: mirror PHP self/descendant guard so we fail fast
    const norm = s => {
      if (!s) return '';
      return s.replace(/^[/\\]+|[/\\]+$/g, '');
    };
    const srcNorm = norm(source);
    const dstNorm = destination === 'root' ? '' : norm(destination);

    if (
      !crossSource &&
      dstNorm !== '' &&
      (
        dstNorm.toLowerCase() === srcNorm.toLowerCase() ||
        (dstNorm + '/').toLowerCase().startsWith((srcNorm + '/').toLowerCase())
      )
    ) {
      showToast(t('dest_cannot_be_descendant'));
      return;
    }