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# SPDX-License-Identifier: AGPL-3.0-or-later
# Processing of repository packages.
#
# This file is part of Hydrilla
#
# Copyright (C) 2021, 2022 Wojtek Kosior
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
#
# I, Wojtek Kosior, thereby promise not to sue for violation of this
# file's license. Although I request that you do not make use of this
# code in a proprietary program, I am not going to enforce this in
# court.
import logging
import dataclasses as dc
import typing as t
from pathlib import Path
from immutables import Map
from ..translations import smart_gettext as _
from ..exceptions import HaketiloException
from .. import versions
from .. import item_infos
from .. import pattern_tree
MappingTree = pattern_tree.PatternTree[item_infos.MappingInfo]
# VersionedType = t.TypeVar(
# 'VersionedType',
# item_infos.ResourceInfo,
# item_infos.MappingInfo
# )
class Malcontent:
"""
Represent a directory with files that can be loaded and served by Hydrilla.
"""
def __init__(
self,
malcontent_dir_path: Path,
werror: bool,
verify_files: bool
):
"""
When an instance of Malcontent is constructed, it searches
malcontent_dir_path for serveable site-modifying packages and loads
them into its data structures.
"""
self.werror: bool = werror
self.verify_files: bool = verify_files
self.resource_infos: item_infos.VersionedResourceInfoMap = Map()
self.mapping_infos: item_infos.VersionedMappingInfoMap = Map()
self.mapping_tree: MappingTree = MappingTree()
self.malcontent_dir_path = malcontent_dir_path
if not self.malcontent_dir_path.is_dir():
fmt = _('err.server.malcontent_path_not_dir_{}')
raise HaketiloException(fmt.format(malcontent_dir_path))
for type in [item_infos.ItemType.RESOURCE, item_infos.ItemType.MAPPING]:
type_path = self.malcontent_dir_path / type.value
if not type_path.is_dir():
continue
for subpath in type_path.iterdir():
if not subpath.is_dir():
continue
for ver_file in subpath.iterdir():
try:
self._load_item(type, ver_file)
except:
if self.werror:
raise
fmt = _('err.server.couldnt_load_item_from_{}')
logging.error(fmt.format(ver_file), exc_info=True)
self._report_missing()
self._finalize()
def _check_package_files(self, info: item_infos.AnyInfo) -> None:
by_sha256_dir = self.malcontent_dir_path / 'file' / 'sha256'
for file_spec in info.files:
if (by_sha256_dir / file_spec.sha256).is_file():
continue
fmt = _('err.server.no_file_{required_by}_{ver}_{file}_{sha256}')
msg = fmt.format(
required_by = info.identifier,
ver = versions.version_string(info.version),
file = file_spec.name,
sha256 = file_spec.sha256
)
if (self.werror):
raise HaketiloException(msg)
else:
logging.error(msg)
def _load_item(self, type: item_infos.ItemType, ver_file: Path) \
-> None:
"""
Reads, validates and autocompletes serveable mapping/resource
definition, then registers information from it in data structures.
"""
version = versions.parse(ver_file.name)
identifier = ver_file.parent.name
item_info = type.info_class.load(ver_file)
if item_info.identifier != identifier:
fmt = _('err.server.item_{item}_in_file_{file}')
msg = fmt.format({'item': item_info.identifier, 'file': ver_file})
raise HaketiloException(msg)
if item_info.version != version:
ver_str = versions.version_string(item_info.version)
fmt = _('item_version_{ver}_in_file_{file}')
msg = fmt.format({'ver': ver_str, 'file': ver_file})
raise HaketiloException(msg)
if self.verify_files:
self._check_package_files(item_info)
if isinstance(item_info, item_infos.ResourceInfo):
self.resource_infos = item_infos.register_in_versioned_map(
map = self.resource_infos,
info = item_info
)
else:
self.mapping_infos = item_infos.register_in_versioned_map(
map = self.mapping_infos,
info = item_info
)
def _report_missing(self) -> None:
"""
Use logger to print information about items that are referenced but
were not loaded.
"""
def report_missing_dependency(
info: item_infos.ResourceInfo,
dep: str
) -> None:
msg = _('err.server.no_dep_{resource}_{ver}_{dep}')\
.format(dep=dep, resource=info.identifier,
ver=versions.version_string(info.version))
logging.error(msg)
for resource_info in item_infos.all_map_infos(self.resource_infos):
for dep_specifier in resource_info.dependencies:
identifier = dep_specifier.identifier
if identifier not in self.resource_infos:
report_missing_dependency(resource_info, identifier)
def report_missing_payload(
info: item_infos.MappingInfo,
payload: str
) -> None:
msg = _('err.server.no_payload_{mapping}_{ver}_{payload}')\
.format(mapping=info.identifier, payload=payload,
ver=versions.version_string(info.version))
logging.error(msg)
for mapping_info in item_infos.all_map_infos(self.mapping_infos):
for resource_specifier in mapping_info.payloads.values():
identifier = resource_specifier.identifier
if identifier not in self.resource_infos:
report_missing_payload(mapping_info, identifier)
def report_missing_mapping(
info: item_infos.AnyInfo,
required: str
) -> None:
msg = _('err.server.no_mapping_{required_by}_{ver}_{required}')\
.format(required_by=info.identifier, required=required,
ver=versions.version_string(info.version))
logging.error(msg)
infos: t.Iterable[item_infos.AnyInfo] = (
*item_infos.all_map_infos(self.mapping_infos),
*item_infos.all_map_infos(self.resource_infos)
)
for item_info in infos:
for mapping_specifier in item_info.required_mappings:
identifier = mapping_specifier.identifier
if identifier not in self.mapping_infos:
report_missing_mapping(item_info, identifier)
def _finalize(self):
"""
Initialize structures needed to serve queries. Called once after all
data gets loaded.
"""
for info in item_infos.all_map_infos(self.mapping_infos):
for pattern in info.payloads:
try:
self.mapping_tree = \
self.mapping_tree.register(pattern, info)
except:
if self.werror:
raise
msg = _('server.err.couldnt_register_{mapping}_{ver}_{pattern}')\
.format(mapping=info.identifier, pattern=pattern,
ver=util.version_string(info.version))
logging.error(msg)
def query(self, url: str) -> t.Sequence[item_infos.MappingInfo]:
"""
Return a list of registered mappings that match url.
If multiple versions of a mapping are applicable, only the most recent
is included in the result.
"""
collected: t.Dict[str, item_infos.MappingInfo] = {}
for result_set in self.mapping_tree.search(url):
for wrapped_mapping_info in result_set:
info = wrapped_mapping_info.item
previous = collected.get(info.identifier)
if previous and previous.version > info.version:
continue
collected[info.identifier] = info
return list(collected.values())
def get_all_resources(self) -> t.Sequence[item_infos.ResourceInfo]:
return tuple(item_infos.all_map_infos(self.resource_infos))
def get_all_mappings(self) -> t.Sequence[item_infos.MappingInfo]:
return tuple(item_infos.all_map_infos(self.mapping_infos))
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