Add a conveter for OSMand favorites

gpx_to_osmand_favorites.py

@@ -0,0 +1,106 @@
+#!/usr/bin/env python3
+import os
+import sys
+import xml.etree.ElementTree as ET
+from datetime import datetime, timezone
+
+GPX_NS = "http://www.topografix.com/GPX/1/1"
+OSMAND_NS = "https://osmand.net"
+
+ET.register_namespace("", GPX_NS)
+ET.register_namespace("osmand", OSMAND_NS)
+
+def iso_now_z():
+    return datetime.now(timezone.utc).replace(microsecond=0).isoformat().replace("+00:00", "Z")
+
+def localname(tag):
+    return tag.split("}", 1)[-1] if "}" in tag else tag
+
+def find_child_by_localname(parent, wanted):
+    for ch in list(parent):
+        if localname(ch.tag) == wanted:
+            return ch
+    return None
+
+def get_metadata_name_anyns(root):
+    md = find_child_by_localname(root, "metadata")
+    if md is None:
+        return None
+    nm = find_child_by_localname(md, "name")
+    if nm is None:
+        return None
+    txt = (nm.text or "").strip()
+    return txt or None
+
+def guess_group(in_path, root, prefix):
+    base = get_metadata_name_anyns(root)
+    if not base:
+        base = os.path.splitext(os.path.basename(in_path))[0]
+    if prefix:
+        return f"{prefix.rstrip('/')}/{base}"
+    return base
+
+def main():
+    if len(sys.argv) not in (3, 4):
+        print(
+            "Usage: gpx_to_osmand_favorites_autogroup_fixed.py input.gpx output.gpx [prefix]\n"
+            "Example: gpx_to_osmand_favorites_autogroup_fixed.py 4x4.gpx 4x4_osmand.gpx Norwegen",
+            file=sys.stderr
+        )
+        sys.exit(2)
+
+    in_path = sys.argv[1]
+    out_path = sys.argv[2]
+    prefix = sys.argv[3] if len(sys.argv) == 4 else ""
+
+    tree = ET.parse(in_path)
+    root = tree.getroot()
+
+    group = guess_group(in_path, root, prefix)
+
+    in_wpts = [el for el in root.iter() if localname(el.tag) == "wpt"]
+    if not in_wpts:
+        raise SystemExit(f"No <wpt> elements found in {in_path}")
+
+    out_root = ET.Element(f"{{{GPX_NS}}}gpx", {
+        "version": "1.1",
+        "creator": "gpx_to_osmand_favorites_autogroup_fixed.py",
+    })
+
+    md = ET.SubElement(out_root, f"{{{GPX_NS}}}metadata")
+    ET.SubElement(md, f"{{{GPX_NS}}}name").text = f"OsmAnd favorites: {group}"
+    ET.SubElement(md, f"{{{GPX_NS}}}time").text = iso_now_z()
+
+    written = 0
+    for w in in_wpts:
+        lat = w.attrib.get("lat")
+        lon = w.attrib.get("lon")
+        if lat is None or lon is None:
+            continue
+
+        out_wpt = ET.SubElement(out_root, f"{{{GPX_NS}}}wpt", {"lat": str(lat), "lon": str(lon)})
+
+        # Copy common fields if present
+        for ch in list(w):
+            ln = localname(ch.tag)
+            if ln in ("name", "cmt", "desc", "ele", "time") and ch.text not in (None, ""):
+                ET.SubElement(out_wpt, f"{{{GPX_NS}}}{ln}").text = ch.text
+
+        # Ensure we have a name
+        if find_child_by_localname(out_wpt, "name") is None:
+            ET.SubElement(out_wpt, f"{{{GPX_NS}}}name").text = f"Favorite {written+1}"
+
+        # OsmAnd favorites group (key field)
+        ET.SubElement(out_wpt, f"{{{GPX_NS}}}type").text = group
+
+        # Optional OsmAnd hint (safe if ignored)
+        ext = ET.SubElement(out_wpt, f"{{{GPX_NS}}}extensions")
+        ET.SubElement(ext, f"{{{OSMAND_NS}}}category").text = group
+
+        written += 1
+
+    ET.ElementTree(out_root).write(out_path, encoding="UTF-8", xml_declaration=True)
+    print(f"Wrote {written} waypoint(s) to {out_path} with OsmAnd favorites group '{group}'")
+
+if __name__ == "__main__":
+    main()