feat: Add support for series metadata and closing outro in audio conversion

tests/test_calibre_opds.py

@@ -0,0 +1,33 @@
+from abogen.integrations.calibre_opds import CalibreOPDSClient, feed_to_dict
+
+
+def test_calibre_opds_feed_exposes_series_metadata() -> None:
+    client = CalibreOPDSClient("http://example.com/catalog")
+    xml_payload = """<?xml version=\"1.0\" encoding=\"UTF-8\"?>
+    <feed xmlns=\"http://www.w3.org/2005/Atom\"
+          xmlns:dc=\"http://purl.org/dc/terms/\"
+          xmlns:calibre=\"http://calibre.kovidgoyal.net/2009/catalog\">
+      <id>catalog</id>
+      <title>Example Catalog</title>
+      <entry>
+        <id>book-1</id>
+        <title>Sample Book</title>
+        <calibre:series>The Expanse</calibre:series>
+        <calibre:series_index>4</calibre:series_index>
+        <link rel=\"http://opds-spec.org/acquisition\"
+              href=\"books/sample.epub\"
+              type=\"application/epub+zip\" />
+      </entry>
+    </feed>
+    """
+
+    feed = client._parse_feed(xml_payload, base_url="http://example.com/catalog")
+    assert feed.entries, "Expected at least one entry in parsed feed"
+    entry = feed.entries[0]
+
+    assert entry.series == "The Expanse"
+    assert entry.series_index == 4.0
+
+    feed_dict = feed_to_dict(feed)
+    assert feed_dict["entries"][0]["series"] == "The Expanse"
+    assert feed_dict["entries"][0]["series_index"] == 4.0