ytdl-sub/src/ytdl_sub/downloaders/url/validators.py
Jesse Bannon 7c692cda6e
[REFACTOR] BaseDownloader (#542)
* [REFACTOR] BaseDownloader

* doh

* fix mock
2023-03-14 23:42:50 -07:00

248 lines
9.1 KiB
Python

from typing import Any
from typing import Dict
from typing import List
from typing import Optional
from ytdl_sub.config.preset_options import AddsVariablesMixin
from ytdl_sub.validators.strict_dict_validator import StrictDictValidator
from ytdl_sub.validators.string_formatter_validators import DictFormatterValidator
from ytdl_sub.validators.string_formatter_validators import OverridesStringFormatterValidator
from ytdl_sub.validators.string_formatter_validators import StringFormatterValidator
from ytdl_sub.validators.validators import BoolValidator
from ytdl_sub.validators.validators import ListValidator
class UrlThumbnailValidator(StrictDictValidator):
_required_keys = {"name", "uid"}
def __init__(self, name, value):
super().__init__(name, value)
self._name = self._validate_key(key="name", validator=StringFormatterValidator)
self._uid = self._validate_key(key="uid", validator=OverridesStringFormatterValidator)
@property
def name(self) -> StringFormatterValidator:
"""
File name for the thumbnail
"""
return self._name
@property
def uid(self) -> OverridesStringFormatterValidator:
"""
yt-dlp's unique ID of the thumbnail
"""
return self._uid
class UrlThumbnailListValidator(ListValidator[UrlThumbnailValidator]):
_inner_list_type = UrlThumbnailValidator
class UrlValidator(StrictDictValidator):
_required_keys = {"url"}
_optional_keys = {"variables", "source_thumbnails", "playlist_thumbnails", "download_reverse"}
@classmethod
def partial_validate(cls, name: str, value: Any) -> None:
"""
Partially validate a YouTube collection url
"""
if isinstance(value, dict):
value["url"] = value.get("url", "placeholder")
_ = cls(name, value)
def __init__(self, name, value):
super().__init__(name, value)
# TODO: url validate using yt-dlp IE
self._url = self._validate_key(key="url", validator=OverridesStringFormatterValidator)
self._variables = self._validate_key_if_present(
key="variables", validator=DictFormatterValidator, default={}
)
self._source_thumbnails = self._validate_key_if_present(
key="source_thumbnails", validator=UrlThumbnailListValidator, default=[]
)
self._playlist_thumbnails = self._validate_key_if_present(
key="playlist_thumbnails", validator=UrlThumbnailListValidator, default=[]
)
self._download_reverse = self._validate_key(
key="download_reverse", validator=BoolValidator, default=True
)
@property
def url(self) -> OverridesStringFormatterValidator:
"""
Required. URL to download from, listed in priority from lowest (top) to highest (bottom).
If a download exists in more than one URL, it will resolve to the bottom-most one and
inherit those variables.
"""
return self._url
@property
def variables(self) -> DictFormatterValidator:
"""
Source variables to add to each entry. The top-most collection must define all possible
variables. Collections below can redefine all of them or a subset of the top-most variables.
"""
return self._variables
@property
def playlist_thumbnails(self) -> Optional[UrlThumbnailListValidator]:
"""
Thumbnails to download from the playlist, if any exist. Playlist is the ``yt-dlp`` naming
convention for a set that contains multiple entries. For example, the URL
``https://www.youtube.com/c/RickastleyCoUkOfficial`` would have ``playlist`` refer to the
channel.
Usage:
.. code-block:: yaml
playlist_thumbnails:
- name: "poster.jpg"
uid: "avatar_uncropped"
- name: "fanart.jpg"
uid: "banner_uncropped"
``name`` is the file name relative to the output directory to store the thumbnail.
``uid`` is the yt-dlp thumbnail ID. Can specify ``latest_entry`` to use the latest entry's
thumbnail.
"""
return self._playlist_thumbnails
@property
def source_thumbnails(self) -> Optional[UrlThumbnailListValidator]:
"""
Thumbnails to download from the source, if any exist. Source in this context refers to the
set of sets. For example, the URL
``https://www.youtube.com/c/RickastleyCoUkOfficial/playlists``
would have ``playlist`` refer to each individual playlist, whereas ``source`` refers
to the channel.
Usage:
.. code-block:: yaml
source_thumbnails:
- name: "poster.jpg"
uid: "avatar_uncropped"
- name: "fanart.jpg"
uid: "banner_uncropped"
``name`` is the file name relative to the output directory to store the thumbnail.
``uid`` is the yt-dlp thumbnail ID. Can specify ``latest_entry`` to use the latest entry's
thumbnail.
"""
return self._source_thumbnails
@property
def download_reverse(self) -> bool:
"""
Optional. Whether to download entries in the reverse order of the metadata downloaded.
Defaults to True.
"""
return self._download_reverse.value
class UrlListValidator(ListValidator[UrlValidator]):
_inner_list_type = UrlValidator
_expected_value_type_name = "collection url list"
def __init__(self, name, value):
super().__init__(name, value)
added_variables: Dict[str, str] = self.list[0].variables.dict_with_format_strings
for idx, collection_url_validator in enumerate(self.list[1:]):
collection_variables = collection_url_validator.variables.dict_with_format_strings
# see if this collection contains new added vars (it should not)
for var in collection_variables.keys():
if var not in added_variables:
raise self._validation_exception(
f"Collection url {idx} contains the variable '{var}' that the first "
f"collection url does not. The first collection url must define all added "
f"variables."
)
# see if this collection is missing any added vars (if so, inherit from the top)
for var in added_variables.keys():
if var not in collection_variables.keys():
collection_variables[var] = added_variables[var]
class MultiUrlValidator(StrictDictValidator, AddsVariablesMixin):
"""
Downloads from multiple URLs. If an entry is returned from more than one URL, it will
resolve to the bottom-most URL settings.
"""
_required_keys = {"urls"}
@classmethod
def partial_validate(cls, name: str, value: Any) -> None:
"""
Partially validate a collection
"""
if isinstance(value, dict):
value["urls"] = value.get("urls", [{"url": "placeholder"}])
_ = cls(name, value)
def __init__(self, name, value):
super().__init__(name, value)
self._urls = self._validate_key(key="urls", validator=UrlListValidator)
@property
def urls(self) -> UrlListValidator:
"""
Required. A list of :ref:`url` with the addition of the ``variables`` attribute.
"""
return self._urls
@property
def variables(self) -> DictFormatterValidator:
"""
Optional. Source variables to add to each entry downloaded from its respective :ref:`url`.
The top-most :ref:`url` must define all possible variables. Other :ref:`url` entries can
redefine all of them or a subset of the top-most variables.
"""
# keep for readthedocs documentation
return self._urls.list[0].variables
def added_source_variables(self) -> List[str]:
"""
Returns
-------
List of variables added. The first collection url always contains all the variables.
"""
return list(self._urls.list[0].variables.keys)
def validate_with_variables(
self, source_variables: List[str], override_variables: Dict[str, str]
) -> None:
"""
Ensures new variables added are not existing variables
"""
for source_var_name in self.added_source_variables():
if source_var_name in source_variables:
raise self._validation_exception(
f"'{source_var_name}' cannot be used as a variable name because it "
f"is an existing source variable"
)
base_variables = dict(
override_variables, **{source_var: "dummy_string" for source_var in source_variables}
)
# Apply formatting to each new source variable, ensure it resolves
for collection_url in self.urls.list:
for (
source_var_name,
source_var_formatter_str,
) in collection_url.variables.dict_with_format_strings.items():
_ = StringFormatterValidator(
name=f"{self._name}.{source_var_name}", value=source_var_formatter_str
).apply_formatter(base_variables)