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# generat3D - evaluate Daz DSON scenes and write .dbz files
# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import gzip
import json
import os
from pathlib import Path
from urllib.parse import unquote
from . import Error
def parse_url(url):
"""Split a DSON URL "node:/path/file.dsf#id?prop" into (node, path, id, prop)."""
node = ""
if not url.startswith(("/", "#")) and ":" in url:
node, url = url.split(":", 1)
url, _, prop = url.partition("?")
path, _, ident = url.partition("#")
return unquote(node), unquote(path), unquote(ident), prop
def read_dson(path):
"""Parse a plain or gzipped DSON file."""
try:
data = Path(path).read_bytes()
if data[:2] == b"\x1f\x8b":
data = gzip.decompress(data)
return json.loads(data)
except (OSError, EOFError, ValueError) as e:
raise Error(f"{path}: {e}") from None
def _find_nocase(base, parts, want_dir=False):
for part in parts:
try:
names = {n.lower(): n for n in os.listdir(base)}
except OSError:
return None
name = names.get(part.lower())
if name is None:
return None
base = base / name
return base if (base.is_dir() if want_dir else base.is_file()) else None
class Library:
def __init__(self, roots):
self.roots = [Path(r) for r in roots]
self._docs = {}
def _locate(self, rel, want_dir):
for root in self.roots:
p = root / rel
if p.is_dir() if want_dir else p.is_file():
yield root, p
continue
p = _find_nocase(root, rel.split("/"), want_dir)
if p:
yield root, p
def find(self, path):
"""File for a library path like "/data/x.dsf", first root wins, or None."""
return next((p for _, p in self._locate(path.strip("/"), False)), None)
def load(self, path):
"""Parsed DSON document for a library path. Error if missing or broken."""
key = path.lower()
if key not in self._docs:
f = self.find(path)
if f is None:
raise Error(f"not found in library roots: {path}")
self._docs[key] = read_dson(f)
return self._docs[key]
def walk(self, path):
"""Library paths of every .dsf under a library directory, across all roots."""
seen = {}
for root, base in self._locate(path.strip("/"), True):
for f in sorted(base.rglob("*")):
if f.is_file() and f.suffix.lower() == ".dsf":
lp = "/" + f.relative_to(root).as_posix()
seen.setdefault(lp.lower(), lp)
return list(seen.values())
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