"""
Category Controller - Business logic for handling category data.

This module contains functions that interact with the database
to fetch and process data sorted by category
"""
from models.database import category_collection # pylint: disable=import-error

def get_categories():

    """
    Returns all categories and their corresponding sites

    """
    categories = list(category_collection.find({}, {"_id": 0, "category": 1, "site": 1}))
    return categories