(feature): Add basic streamalerts.

src/settings/groups.py

@@ -0,0 +1,204 @@
+from typing import Generic, Type, TypeVar, Optional, overload
+
+from data import RowModel
+
+from .data import ModelData
+from .ui import InteractiveSetting
+from .base import BaseSetting
+
+from utils.lib import tabulate
+
+
+T = TypeVar('T', bound=InteractiveSetting)
+
+
+class SettingDotDict(Generic[T], dict[str, Type[T]]):
+    """
+    Dictionary structure allowing simple dot access to items.
+    """
+    __getattr__ = dict.__getitem__  # type: ignore
+    __setattr__ = dict.__setitem__  # type: ignore
+    __delattr__ = dict.__delitem__  # type: ignore
+
+
+class SettingGroup:
+    """
+    A SettingGroup is a collection of settings under one name.
+    """
+    __initial_settings__: list[Type[InteractiveSetting]] = []
+
+    _title: Optional[str] = None
+    _description: Optional[str] = None
+
+    def __init_subclass__(cls, title: Optional[str] = None):
+        cls._title = title or cls._title
+        cls._description = cls._description or cls.__doc__
+
+        settings: list[Type[InteractiveSetting]] = []
+        for item in cls.__dict__.values():
+            if isinstance(item, type) and issubclass(item, InteractiveSetting):
+                settings.append(item)
+        cls.__initial_settings__ = settings
+
+    def __init_settings__(self):
+        settings = SettingDotDict()
+        for setting in self.__initial_settings__:
+            settings[setting.__name__] = setting
+        return settings
+
+    def __init__(self, title=None, description=None) -> None:
+        self.title: str = title or self._title or self.__class__.__name__
+        self.description: str = description or self._description or ""
+        self.settings: SettingDotDict[InteractiveSetting] = self.__init_settings__()
+
+    def attach(self, cls: Type[T], name: Optional[str] = None):
+        name = name or cls.setting_id
+        self.settings[name] = cls
+        return cls
+
+    def detach(self, cls):
+        return self.settings.pop(cls.__name__, None)
+
+    def update(self, smap):
+        self.settings.update(smap.settings)
+
+    def reduce(self, *keys):
+        for key in keys:
+            self.settings.pop(key, None)
+        return
+
+    async def make_setting_table(self, parent_id, **kwargs):
+        """
+        Convenience method for generating a rendered setting table.
+        """
+        rows = []
+        for setting in self.settings.values():
+            if not setting._virtual:
+                set = await setting.get(parent_id, **kwargs)
+                name = set.display_name
+                value = str(set.formatted)
+                rows.append((name, value, set.hover_desc))
+        table_rows = tabulate(
+            *rows,
+            row_format="[`{invis}{key:<{pad}}{colon}`](https://lionbot.org \"{field[2]}\")\t{value}"
+        )
+        return '\n'.join(table_rows)
+
+
+class ModelSetting(ModelData, BaseSetting):
+    ...
+
+
+class ModelConfig:
+    """
+    A ModelConfig provides a central point of configuration for any object described by a single Model.
+
+    An instance of a ModelConfig represents configuration for a single object
+    (given by a single row of the corresponding Model).
+
+    The ModelConfig also supports registration of non-model configuration,
+    to support associated settings (e.g. list-settings) for the object.
+
+    This is an ABC, and must be subclassed for each object-type.
+    """
+    settings: SettingDotDict
+    _model_settings: set
+    model: Type[RowModel]
+
+    def __init__(self, parent_id, row, **kwargs):
+        self.parent_id = parent_id
+        self.row = row
+        self.kwargs = kwargs
+
+    @classmethod
+    def register_setting(cls, setting_cls):
+        """
+        Decorator to register a non-model setting as part of the object configuration.
+
+        The setting class may be re-accessed through the `settings` class attr.
+
+        Subclasses may provide alternative access pathways to key non-model settings.
+        """
+        cls.settings[setting_cls.setting_id] = setting_cls
+        return setting_cls
+
+    @classmethod
+    def register_model_setting(cls, model_setting_cls):
+        """
+        Decorator to register a model setting as part of the object configuration.
+
+        The setting class may be accessed through the `settings` class attr.
+
+        A fresh setting instance may also be retrieved (using cached data)
+        through the `get` instance method.
+
+        Subclasses are recommended to provide model settings as properties
+        for simplified access and type checking.
+        """
+        cls._model_settings.add(model_setting_cls.setting_id)
+        return cls.register_setting(model_setting_cls)
+
+    def get(self, setting_id):
+        """
+        Retrieve a freshly initialised copy of the given model-setting.
+
+        The given `setting_id` must have been previously registered through `register_model_setting`.
+        This uses cached data, and so is not guaranteed to be up-to-date.
+        """
+        if setting_id not in self._model_settings:
+            # TODO: Log
+            raise ValueError
+        setting_cls = self.settings[setting_id]
+        data = setting_cls._read_from_row(self.parent_id, self.row, **self.kwargs)
+        return setting_cls(self.parent_id, data, **self.kwargs)
+
+
+class ModelSettings:
+    """
+    A ModelSettings instance aggregates multiple `ModelSetting` instances
+    bound to the same parent id on a single Model.
+
+    This enables a single point of access
+    for settings of a given Model,
+    with support for caching or deriving as needed.
+
+    This is an abstract base class,
+    and should be subclassed to define the contained settings.
+    """
+    _settings: SettingDotDict = SettingDotDict()
+    model: Type[RowModel]
+
+    def __init__(self, parent_id, row, **kwargs):
+        self.parent_id = parent_id
+        self.row = row
+        self.kwargs = kwargs
+
+    @classmethod
+    async def fetch(cls, *parent_id, **kwargs):
+        """
+        Load an instance of this ModelSetting with the given parent_id
+        and setting keyword arguments.
+        """
+        row = await cls.model.fetch_or_create(*parent_id)
+        return cls(parent_id, row, **kwargs)
+
+    @classmethod
+    def attach(self, setting_cls):
+        """
+        Decorator to attach the given setting class to this modelsetting.
+        """
+        # This violates the interface principle, use structured typing instead?
+        if not (issubclass(setting_cls, BaseSetting) and issubclass(setting_cls, ModelData)):
+            raise ValueError(
+                f"The provided setting class must be `ModelSetting`, not {setting_cls.__class__.__name__}."
+            )
+        self._settings[setting_cls.setting_id] = setting_cls
+        return setting_cls
+
+    def get(self, setting_id):
+        setting_cls = self._settings.get(setting_id)
+        data = setting_cls._read_from_row(self.parent_id, self.row, **self.kwargs)
+        return setting_cls(self.parent_id, data, **self.kwargs)
+
+    def __getitem__(self, setting_id):
+        return self.get(setting_id)