Add upload overwrite dialog

server/public/app.js

@@ -12,6 +12,7 @@ const state = {
   selectedEntry: null,
   contextMenu: null,
   permissionsDialog: null,
+  uploadConflictDialog: null,
   draggedEntry: null,
   pointerDrag: null,
   suppressClickPath: null,
@@ -197,6 +198,9 @@ function render() {
   if (state.permissionsDialog) {
     workspace.appendChild(renderPermissionsDialog());
   }
+  if (state.uploadConflictDialog) {
+    workspace.appendChild(renderUploadConflictDialog());
+  }
   renderTransferPanel();
   renderSettingsPanel();
 }
@@ -928,6 +932,7 @@ async function uploadFileList(win, files, targetPath) {
   if (!files.length) return;
   const uploadItems = normalizeUploadItems(files);
   const transfer = createUploadTransfer(targetPath, uploadItems);
+  let overwriteAll = false;
   for (const [index, item] of uploadItems.entries()) {
     updateUploadTransfer(transfer, {
       status: 'running',
@@ -955,11 +960,21 @@ async function uploadFileList(win, files, targetPath) {
         }, true);
         throw error;
       }
-      const overwrite = window.confirm(`"${item.path}" existiert bereits.\n\nVorhandene Datei überschreiben?`);
-      recordDebug('upload.overwrite.prompt', { path: item.path, overwrite });
+      const conflictAction = overwriteAll ? 'overwrite' : await askUploadConflict({
+        path: item.path,
+        targetPath,
+        index: index + 1,
+        total: uploadItems.length
+      });
+      if (conflictAction === 'overwrite-all') {
+        overwriteAll = true;
+      }
+      const overwrite = overwriteAll || conflictAction === 'overwrite';
+      recordDebug('upload.overwrite.prompt', { path: item.path, action: conflictAction, overwrite });
       if (!overwrite) {
         updateUploadTransfer(transfer, {
           skippedFiles: transfer.skippedFiles + 1,
+          skippedBytes: transfer.skippedBytes + Number(item.file.size || 0),
           currentFile: item.path,
           progress: uploadProgressPercent(transfer)
         });
@@ -1051,6 +1066,7 @@ function createUploadTransfer(targetPath, uploadItems) {
     overwrittenFiles: 0,
     totalBytes: uploadItems.reduce((sum, item) => sum + Number(item.file?.size || 0), 0),
     uploadedBytes: 0,
+    skippedBytes: 0,
     currentFile: '',
     currentIndex: 0,
     progress: 0,
@@ -1084,7 +1100,7 @@ function addUploadProgress(transfer, bytes) {
 
 function uploadProgressPercent(transfer) {
   if (transfer.totalBytes > 0) {
-    return (transfer.uploadedBytes / transfer.totalBytes) * 100;
+    return ((transfer.uploadedBytes + transfer.skippedBytes) / transfer.totalBytes) * 100;
   }
   if (transfer.totalFiles > 0) {
     return ((transfer.completedFiles + transfer.skippedFiles) / transfer.totalFiles) * 100;
@@ -1424,6 +1440,67 @@ function renderPermissionsDialog() {
   return overlay;
 }
 
+function askUploadConflict(details) {
+  return new Promise((resolve) => {
+    state.uploadConflictDialog = { ...details, resolve };
+    render();
+  });
+}
+
+function renderUploadConflictDialog() {
+  const dialog = state.uploadConflictDialog;
+  const overlay = document.createElement('div');
+  overlay.className = 'modal-overlay';
+  overlay.innerHTML = `
+    <form class="permissions-modal conflict-modal" aria-label="Datei existiert bereits">
+      <header>
+        <strong>Datei existiert bereits</strong>
+        <button type="button" class="icon" data-action="skip" title="Überspringen" aria-label="Überspringen">×</button>
+      </header>
+      <div class="modal-body">
+        <p>Im Zielordner existiert bereits eine Datei mit diesem Namen.</p>
+        <dl class="conflict-details">
+          <dt>Datei</dt>
+          <dd>${escapeHtml(dialog.path)}</dd>
+          <dt>Ziel</dt>
+          <dd>${escapeHtml(dialog.targetPath)}</dd>
+          <dt>Upload</dt>
+          <dd>${escapeHtml(`${dialog.index}/${dialog.total}`)}</dd>
+        </dl>
+      </div>
+      <footer>
+        <button type="button" data-action="skip">Überspringen</button>
+        <button type="button" data-action="overwrite">Überschreiben</button>
+        <button type="submit" class="primary">Alle überschreiben</button>
+      </footer>
+    </form>
+  `;
+
+  const form = overlay.querySelector('form');
+  form.addEventListener('click', (event) => event.stopPropagation());
+  overlay.addEventListener('click', () => closeUploadConflictDialog('skip'));
+  overlay.querySelectorAll('[data-action="skip"]').forEach((button) => {
+    button.addEventListener('click', () => closeUploadConflictDialog('skip'));
+  });
+  overlay.querySelector('[data-action="overwrite"]').addEventListener('click', () => closeUploadConflictDialog('overwrite'));
+  form.addEventListener('submit', (event) => {
+    event.preventDefault();
+    closeUploadConflictDialog('overwrite-all');
+  });
+  setTimeout(() => {
+    form.querySelector('.primary')?.focus();
+  }, 0);
+  return overlay;
+}
+
+function closeUploadConflictDialog(action) {
+  const dialog = state.uploadConflictDialog;
+  if (!dialog) return;
+  state.uploadConflictDialog = null;
+  dialog.resolve(action);
+  render();
+}
+
 function permissionMatrixMarkup(mode) {
   const digits = modeToDigits(mode);
   const rows = [