temporal upload. parcial Phase 2 implementation

nonpacks/library/zips.py

@@ -0,0 +1,100 @@
+"""Zip introspection helpers for category-specific version metadata.
+
+Parsed once at upload time and stored on the Version row, so the detail page
+never re-reads large archives. All functions take the on-disk path of an
+adopted file (under MEDIA_ROOT) and return plain dicts/values.
+"""
+
+import json
+import zipfile
+
+
+def _open_zip(path):
+    """Return a ZipFile for the path (None when it's not a zip)."""
+    try:
+        return zipfile.ZipFile(path)
+    except (zipfile.BadZipFile, OSError):
+        return None
+
+
+def read_pack_mcmeta(path):
+    """Extract the NoN-relevant data from a datapack's pack.mcmeta.
+
+    Returns (pack_format, description) or (None, '').
+    """
+    zf = _open_zip(path)
+    if zf is None:
+        return None, ''
+    try:
+        try:
+            data = json.loads(zf.read('pack.mcmeta').decode('utf-8', 'replace'))
+        except (KeyError, json.JSONDecodeError):
+            return None, ''
+        pack = data.get('pack') or {}
+        try:
+            pack_format = int(pack.get('pack_format'))
+        except (TypeError, ValueError):
+            pack_format = None
+        description = pack.get('description', '') or ''
+        if isinstance(description, (dict, list)):
+            description = json.dumps(description)
+        return pack_format, str(description)
+    finally:
+        zf.close()
+
+
+def parse_mods_manifest(path, filename=''):
+    """Inspect a modpack archive and build a manifest for the Mods tab.
+
+    - Modrinth .mrpack: modrinth.index.json → dependencies
+    - Curseforge modpack: manifest.json → files array
+    - Classic folder layout: minecraft/mods/*.jar
+    Returns a dict: {source, files: [...]}.
+    """
+    zf = _open_zip(path)
+    if zf is None:
+        return {'source': 'unknown', 'files': []}
+
+    try:
+        names = set(zf.namelist())
+
+        if filename.lower().endswith('.mrpack') or 'modrinth.index.json' in names:
+            try:
+                index = json.loads(zf.read('modrinth.index.json').decode('utf-8', 'replace'))
+            except (KeyError, json.JSONDecodeError):
+                index = {}
+            deps = []
+            for dep in index.get('dependencies') or []:
+                deps.append({
+                    'name': dep.get('file_name') or dep.get('project_id', 'unknown'),
+                    'version_id': dep.get('version_id'),
+                    'type': dep.get('dependency_type', ''),
+                })
+            return {'source': 'modrinth', 'files': deps}
+
+        if 'manifest.json' in names:
+            try:
+                manifest = json.loads(zf.read('manifest.json').decode('utf-8', 'replace'))
+            except (KeyError, json.JSONDecodeError):
+                manifest = {}
+            files = []
+            for entry in manifest.get('files') or []:
+                files.append({
+                    'name': entry.get('fileName', entry.get('projectID', 'unknown')),
+                    'project_id': entry.get('projectID'),
+                    'file_id': entry.get('fileID'),
+                })
+            if files:
+                return {'source': 'curseforge', 'files': files}
+
+        mods = []
+        prefix = 'minecraft/mods/'
+        for name in sorted(names):
+            if name.startswith(prefix) and not name.endswith('/'):
+                mods.append({'name': name[len(prefix):]})
+        if mods:
+            return {'source': 'folder', 'files': mods}
+
+        return {'source': 'unknown', 'files': []}
+    finally:
+        zf.close()