from cache.Cache import Cache
from core.global_symbols import NotFound, Removed


class IncCache(Cache):
    """
    Increment the value of the key every time it's accessed
    """

    def _get(self, key, alt_sdp=None):
        value = super()._get(key, alt_sdp=alt_sdp)
        if value in (NotFound, Removed):
            value = 0
        value += 1
        self._put(key, value, alt_sdp)
        return value

    def _put(self, key, value, alt_sdp):
        self._cache[key] = value
        self._add_to_add(key)
        return True

    def _alt_get(self, key):
        return super()._get(key)  # point to parent, not to self