feat: Add position handling in OPDSEntry and update navigation button behavior in the UI

abogen/integrations/calibre_opds.py

@@ -50,6 +50,7 @@ class OPDSLink:
 class OPDSEntry:
     id: str
     title: str
+    position: Optional[int] = None
     authors: List[str] = field(default_factory=list)
     updated: Optional[str] = None
     summary: Optional[str] = None
@@ -62,6 +63,7 @@ class OPDSEntry:
         return {
             "id": self.id,
             "title": self.title,
+            "position": self.position,
             "authors": list(self.authors),
             "updated": self.updated,
             "summary": self.summary,
@@ -243,6 +245,7 @@ class CalibreOPDSClient:
     def _parse_entry(self, node: ET.Element, base_url: str) -> OPDSEntry:
         entry_id = node.findtext("atom:id", default="", namespaces=NS).strip()
         title = node.findtext("atom:title", default="Untitled", namespaces=NS).strip() or "Untitled"
+        position_value = self._extract_position(node)
         updated = node.findtext("atom:updated", default=None, namespaces=NS)
         summary = node.findtext("atom:summary", default=None, namespaces=NS) or node.findtext(
             "atom:content", default=None, namespaces=NS
@@ -272,6 +275,7 @@ class CalibreOPDSClient:
         return OPDSEntry(
             id=entry_id or title,
             title=title,
+            position=position_value,
             authors=authors,
             updated=updated,
             summary=cleaned_summary,
@@ -281,6 +285,25 @@ class CalibreOPDSClient:
             links=list(parsed_links.values()),
         )
 
+    def _extract_position(self, node: ET.Element) -> Optional[int]:
+        candidates = [
+            node.findtext("opds:position", default=None, namespaces=NS),
+            node.findtext("opds:groupPosition", default=None, namespaces=NS),
+            node.findtext("opds:order", default=None, namespaces=NS),
+            node.findtext("dc:identifier", default=None, namespaces=NS),
+        ]
+        for value in candidates:
+            if value is None:
+                continue
+            text = str(value).strip()
+            if not text:
+                continue
+            try:
+                return int(float(text))
+            except (TypeError, ValueError):
+                continue
+        return None
+
     def _parse_links(self, link_nodes: List[ET.Element], base_url: str) -> Dict[str, OPDSLink]:
         results: Dict[str, OPDSLink] = {}
         for link in link_nodes:

abogen/web/routes.py

@@ -2871,7 +2871,7 @@ def calibre_opds_import() -> ResponseReturnValue:
 
     service.store_pending_job(pending)
 
-    redirect_url = url_for("web.prepare_job", pending_id=pending.id)
+    redirect_url = url_for("web.prepare_job", pending_id=pending.id, step="book")
     return jsonify({
         "pending_id": pending.id,
         "redirect_url": redirect_url,

abogen/web/static/find_books.js

@@ -213,18 +213,23 @@ if (modal && browser) {
     ];
     descriptors.forEach(({ key, label }) => {
       const link = resolveRelLink(links, key) || resolveRelLink(links, `/${key}`);
-      if (!link || !link.href) {
-        return;
-      }
       const button = document.createElement('button');
       button.type = 'button';
       button.className = 'button button--ghost';
       button.textContent = label;
+      const hasLink = Boolean(link && link.href);
+      if (hasLink) {
         button.addEventListener('click', () => {
           const targetQuery = key === 'up' ? '' : state.query;
           const tabId = resolveTabIdForHref(link.href);
           loadFeed({ href: link.href, query: targetQuery, activeTab: tabId || (targetQuery ? TabIds.SEARCH : TabIds.CUSTOM) });
         });
+      } else if (key === 'previous') {
+        button.disabled = true;
+        button.setAttribute('aria-disabled', 'true');
+      } else {
+        return;
+      }
       navEl.appendChild(button);
     });
     navEl.hidden = !navEl.childElementCount;
@@ -239,7 +244,9 @@ if (modal && browser) {
 
   const title = document.createElement('h3');
   title.className = 'opds-browser__title';
-    title.textContent = entry.title || 'Untitled';
+  const positionLabel = Number.isFinite(entry?.position) ? Number(entry.position) : null;
+  const baseTitle = entry.title || 'Untitled';
+  title.textContent = positionLabel !== null ? `${positionLabel}. ${baseTitle}` : baseTitle;
     header.appendChild(title);
 
     const authors = formatAuthors(entry.authors);
@@ -375,6 +382,9 @@ if (modal && browser) {
           try {
             const target = new URL(redirectUrl, window.location.origin);
             target.searchParams.set('format', 'json');
+            if (!target.searchParams.has('step')) {
+              target.searchParams.set('step', 'book');
+            }
             await wizard.requestStep(target.toString(), { method: 'GET' });
           } catch (wizardError) {
             console.error('Unable to open wizard via JSON payload', wizardError);