check for doubles

templates/duplicates.html

@@ -4,16 +4,23 @@
 {% block content %}
 <div class="page-header">
   <h1>Duplicate books in Calibre-Web</h1>
+  {% if groups %}
+  <div class="header-actions">
+    <button class="btn btn-danger" onclick="deleteAll(this)">Delete all duplicates (keep oldest)</button>
+  </div>
+  {% endif %}
 </div>
 
+<div id="dedup-progress" style="display:none" class="alert alert-success"></div>
+
 {% if error %}
   <div class="alert alert-warning">Could not fetch books from Calibre-Web: {{ error }}</div>
 {% else %}
   <p class="muted small" style="margin-bottom:1.5rem">
     Scanned <strong>{{ total_books }}</strong> book(s) —
     {% if groups %}
-      found <strong>{{ groups|length }}</strong> duplicate group(s).
-      Books are grouped by normalised title. Keep the one you want and delete the rest.
+      found <strong>{{ groups|length }}</strong> duplicate group(s) (same title + author).
+      The oldest copy (lowest ID) is kept when deleting all.
     {% else %}
       no duplicates found.
     {% endif %}
@@ -77,5 +84,41 @@ async function deleteBook(id, btn) {
     status.textContent = 'Error: ' + e;
   }
 }
+
+async function deleteAll(btn) {
+  if (!confirm('Delete all duplicates from Calibre-Web, keeping the oldest copy of each title+author? This cannot be undone.')) return;
+  btn.disabled = true;
+  btn.textContent = 'Starting…';
+  const progress = document.getElementById('dedup-progress');
+  progress.style.display = '';
+  progress.textContent = 'Fetching book list from Calibre-Web…';
+
+  await fetch('/api/delete_duplicates', {method: 'POST'});
+
+  const poll = setInterval(async () => {
+    const r = await fetch('/api/delete_duplicates/status');
+    const s = await r.json();
+    if (s.error) {
+      clearInterval(poll);
+      progress.textContent = 'Error: ' + s.error;
+      progress.className = 'alert alert-warning';
+      btn.disabled = false;
+      btn.textContent = 'Delete all duplicates (keep oldest)';
+      return;
+    }
+    if (s.total > 0) {
+      progress.textContent = `Deleting… ${s.deleted} / ${s.total} deleted, ${s.failed} failed`;
+    } else {
+      progress.textContent = 'Scanning for duplicates…';
+    }
+    if (s.done) {
+      clearInterval(poll);
+      progress.textContent = `Done — ${s.deleted} book(s) deleted, ${s.failed} failed. Reload to refresh the list.`;
+      btn.textContent = 'Reload';
+      btn.disabled = false;
+      btn.onclick = () => location.reload();
+    }
+  }, 2000);
+}
 </script>
 {% endblock %}