collections.py

from abc import abstractmethod
from dataclasses import field

from .artifact import Artifact
from .random_utils import random


class Collection(Artifact):
    @abstractmethod
    def __getitem__(self, key):
        pass


class ListCollection(Collection):
    items: list = field(default_factory=list)

    def __getitem__(self, index):
        return self.items[index]

    def __len__(self):
        return len(self.items)

    def append(self, item):
        self.items.append(item)

    def extend(self, other):
        self.items.extend(other.items)

    def __add__(self, other):
        return ListCollection(self.items.__add__(other.items))


class DictCollection(Collection):
    items: dict = field(default_factory=dict)

    def __getitem__(self, key):
        return self.items[key]


class ItemPicker(Artifact):
    item: object = None

    def __call__(self, collection: Collection):
        try:
            return collection[int(self.item)]
        except (SyntaxError, KeyError, ValueError) as e:  # in case picking from a dictionary
            return collection[self.item]


class RandomPicker(Artifact):
    def __call__(self, collection: Collection):
        if isinstance(collection, ListCollection):
            return random.choice(list(collection.items))
        elif isinstance(collection, DictCollection):
            return random.choice(list(collection.items.values()))