856 lines
27 KiB
Python
856 lines
27 KiB
Python
from datetime import datetime, date
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import hashlib
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import json
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import zlib
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from sdp.sheerkaDataProviderIO import SheerkaDataProviderIO
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from sdp.sheerkaSerializer import Serializer, SerializerContext
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from core.sheerka_logger import get_logger
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def json_default_converter(o):
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"""
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Default formatter for json
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It's used when the json serializer does not know
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how to serialise a type
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:param o:
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:return:
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"""
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if isinstance(o, (date, datetime)):
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return o.isoformat()
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class Event(object):
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"""
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Class that represents something that modifies the state of the system
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"""
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def __init__(self, message="", user="", date=datetime.now()):
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self.version = 1
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self.user = user
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self.date = date
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self.message = message
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self._digest = None
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def get_digest(self):
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"""
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Returns the digest of the event
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:return: hexa form of the sha256
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"""
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if self._digest:
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return self._digest
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if self.message == "" and self.user == "":
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self._digest = "xxx" # to speed unit tests
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return self._digest
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if not isinstance(self.message, str):
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raise NotImplementedError
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self._digest = hashlib.sha256(f"Event:{self.user}{self.date}{self.message}".encode("utf-8")).hexdigest()
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return self._digest
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def to_dict(self):
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return self.__dict__
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def from_dict(self, as_dict):
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self.user = as_dict["user"]
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self.date = datetime.fromisoformat(as_dict["date"])
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self.message = as_dict["message"]
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class ObjToUpdate:
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"""
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Internal key value class to hold the key (and the value)
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when it is detected
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It's created to distinguish from {key, value}
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"""
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def __init__(self, obj, key=None, digest=None):
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self.obj = obj
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self.has_key = None
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self.has_digest = None
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self._key = None
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self._digest = None
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if key is not None:
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self.set_key(key)
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if digest is not None:
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self.set_digest(digest)
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def get_key(self):
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if self.has_key is None:
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key = SheerkaDataProvider.get_obj_key(self.obj)
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if key is None:
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self.has_key = False
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return None
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else:
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self.has_key = True
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self._key = key
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return key
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elif not self.has_key:
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return None
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else:
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return self._key
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def get_digest(self):
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if self.has_digest is None:
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digest = SheerkaDataProvider.get_obj_digest(self.obj)
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if digest is None:
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self.has_digest = False
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return None
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else:
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self.has_digest = True
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self._digest = digest
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return digest
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elif not self.has_digest:
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return None
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else:
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return self._digest
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def set_digest(self, digest):
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self.has_digest = True
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self._digest = digest
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def set_key(self, key):
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self.has_key = True
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self._key = key
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class State:
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"""
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Class that represents the state of the system (dictionary of all known entries)
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"""
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def __init__(self):
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self.version = 1
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self.date = None
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self.parents = []
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self.events = []
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self.data = {}
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@staticmethod
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def check_duplicate(items, obj: ObjToUpdate, key):
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digest = obj.get_digest()
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if digest is None:
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return
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if not hasattr(items, "__iter__"):
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items = [items]
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for item in items:
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item_digest = SheerkaDataProvider.get_obj_digest(item)
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if item_digest == digest:
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raise SheerkaDataProviderDuplicateKeyError(key, obj.obj)
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def update(self, entry, obj: ObjToUpdate, append=True):
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"""
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adds obj to entry
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:param entry:
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:param obj:
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:param append: if True, duplicate keys will create lists
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:return:
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"""
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obj_to_use = {obj.get_key(): obj.obj} if obj.has_key else obj.obj
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if entry not in self.data:
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self.data[entry] = obj_to_use
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elif not append:
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if isinstance(obj_to_use, dict):
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self.data[entry].update(obj_to_use)
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else:
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self.data[entry] = obj_to_use
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elif isinstance(self.data[entry], list):
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self.check_duplicate(self.data[entry], obj, entry)
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self.data[entry].append(obj.obj)
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elif isinstance(obj_to_use, dict):
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for k in obj_to_use:
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if k not in self.data[entry]:
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self.data[entry][k] = obj_to_use[k]
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elif isinstance(self.data[entry][k], list):
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self.check_duplicate(self.data[entry][k], obj, entry + "." + k)
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self.data[entry][k].append(obj_to_use[k])
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else:
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self.check_duplicate(self.data[entry][k], obj, entry + "." + k)
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self.data[entry][k] = [self.data[entry][k], obj_to_use[k]]
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elif isinstance(self.data[entry], dict):
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raise SheerkaDataProviderError(f"Cannot found key on '{obj.obj}' while all other elements have.", obj.obj)
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else:
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self.check_duplicate(self.data[entry], obj, entry)
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self.data[entry] = [self.data[entry], obj_to_use]
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def modify(self, entry, key, obj, obj_key):
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# if the key changes, make sure to remove the previous entry
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append = False
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if obj_key != key:
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self.remove(entry, lambda k, o: k == key) # modify from on object to another
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append = True
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self.update(entry, ObjToUpdate(obj, obj_key), append=append)
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def modify_in_list(self, entry, key, obj, obj_key, obj_origin, load_ref_if_needed, save_ref_if_needed):
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found = False
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to_remove = None
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for i in range(len(self.data[entry][key])):
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item, is_ref = load_ref_if_needed(self.data[entry][key][i])
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if not hasattr(item, "get_digest"):
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continue
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if item.get_digest() == obj_origin:
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obj = save_ref_if_needed(is_ref, obj)
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if obj_key == key:
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self.data[entry][key][i] = obj
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else:
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to_remove = i
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self.update(entry, ObjToUpdate(obj, obj_key), append=True)
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found = True
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break
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if not found:
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raise (SheerkaDataProviderError(f"Cannot modify '{entry}.{key}'. Item '{obj_origin}' not found.", obj))
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if to_remove is not None:
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del self.data[entry][key][to_remove]
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def remove(self, entry, filter):
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if filter is None:
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del (self.data[entry])
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elif isinstance(self.data[entry], dict):
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keys_to_remove = []
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for key, element in self.data[entry].items():
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if filter(key, element):
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keys_to_remove.append(key)
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for key in keys_to_remove:
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del (self.data[entry][key])
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elif not isinstance(self.data[entry], list):
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if filter(self.data[entry]):
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del (self.data[entry])
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else:
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for element in self.data[entry]:
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if filter(element):
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self.data[entry].remove(element)
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def get_digest(self):
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as_json = json.dumps(self.__dict__, default=json_default_converter)
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return hashlib.sha256(as_json.encode("utf-8")).hexdigest()
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def contains(self, entry, key):
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"""
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if key is None, returns True if entry exists
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if key has a value
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returns True if entry is an dict and contains key
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:param entry:
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:param key:
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:return:
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"""
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if entry not in self.data:
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return False
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if key is None:
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return entry in self.data
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if not isinstance(self.data[entry], dict):
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return False
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return key in self.data[entry]
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class SheerkaDataProviderError(Exception):
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def __init__(self, message, obj):
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Exception.__init__(self, message)
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self.obj = obj
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class SheerkaDataProviderDuplicateKeyError(Exception):
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def __init__(self, key, obj):
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Exception.__init__(self, "Duplicate object.")
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self.key = key
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self.obj = obj
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class SheerkaDataProvider:
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"""Manages the state of the system"""
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EventFolder = "events"
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StateFolder = "state"
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ObjectsFolder = "objects"
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CacheFolder = "cache"
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HeadFile = "HEAD"
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KeysFile = "keys"
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REF_PREFIX = "##REF##:"
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def __init__(self, root=None):
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self.log = get_logger(__name__)
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self.init_log = get_logger("init." + __name__)
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self.init_log.debug("Initializing sdp.")
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self.io = SheerkaDataProviderIO.get(root)
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self.first_time = self.io.first_time
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self.serializer = Serializer()
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@staticmethod
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def get_obj_key(obj):
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"""
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Tries to find the key of an object
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Look for .key, .get_key()
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:param obj:
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:return: String version of that is found, None otherwise
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"""
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return str(obj.key) if hasattr(obj, "key") \
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else str(obj.get_key()) if hasattr(obj, "get_key") \
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else None
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@staticmethod
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def get_obj_digest(obj):
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"""
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Tries to find the key of an object
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Look for .digest, .get_digest()
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:param obj:
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:return: digest, None otherwise
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"""
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if isinstance(obj, str) and obj.startswith(SheerkaDataProvider.REF_PREFIX):
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return obj[len(SheerkaDataProvider.REF_PREFIX):]
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return obj.digest if hasattr(obj, "digest") \
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else obj.get_digest() if hasattr(obj, "get_digest") \
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else None
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@staticmethod
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def get_obj_origin(obj):
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"""
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Get the digest used to save obj if set
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"""
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if isinstance(obj, dict) and Serializer.ORIGIN in obj:
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return obj[Serializer.ORIGIN]
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if hasattr(obj, Serializer.ORIGIN):
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return getattr(obj, Serializer.ORIGIN)
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return None
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@staticmethod
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def get_stream_digest(stream):
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sha256_hash = hashlib.sha256()
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for byte_block in iter(lambda: stream.read(4096), b""):
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sha256_hash.update(byte_block)
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stream.seek(0)
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return sha256_hash.hexdigest()
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@staticmethod
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def is_reference(obj):
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return isinstance(obj, str) and obj.startswith(SheerkaDataProvider.REF_PREFIX)
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def add(self, event_digest: str, entry, obj, allow_multiple=True, use_ref=False):
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"""
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Adds obj to the entry 'entry'
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:param event_digest: digest of the event that triggers the modification of the state
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:param entry: entry of the state to update
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:param obj: obj to insert or add
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:param allow_multiple: if set to true, the same key can be added several times.
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All entries will be put in a list
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:param use_ref: if True the actual object is saved under 'objects' folder,
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only a reference is saved in the state
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:return: (entry, key) to retrieve the object
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"""
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snapshot = self.get_snapshot()
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state = self.load_state(snapshot)
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self.log.debug(f"Adding obj '{obj}' in entry '{entry}' (allow_multiple={allow_multiple}, use_ref={use_ref})")
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if not isinstance(obj, ObjToUpdate):
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obj = ObjToUpdate(obj)
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# check uniqueness, cannot add the same key twice if allow_multiple == False
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key = obj.get_key()
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self.log.debug(f"key found : '{key}'") if key else self.log.debug("No key found")
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if not allow_multiple:
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if isinstance(obj.obj, dict):
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for k in obj.obj:
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if state.contains(entry, k):
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raise IndexError(f"{entry}.{k}")
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else:
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if state.contains(entry, key):
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raise IndexError(f"{entry}.{key}" if key else entry)
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state.parents = [] if snapshot is None else [snapshot]
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state.events = [event_digest]
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state.date = datetime.now()
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if use_ref:
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obj.set_digest(self.save_obj(obj.obj))
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obj.obj = self.REF_PREFIX + obj.get_digest()
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state.update(entry, obj)
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new_snapshot = self.save_state(state)
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self.set_snapshot(new_snapshot)
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return entry, key
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def add_with_auto_key(self, event_digest: str, entry, obj):
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"""
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Add obj to entry. An autogenerated key created for obj
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:param event_digest:
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:param entry:
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:param obj:
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:return:
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"""
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next_key = self.get_next_key(entry)
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if hasattr(obj, "set_key"):
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obj.set_key(next_key)
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self.add(event_digest, entry, ObjToUpdate(obj, next_key))
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return entry, next_key
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def add_unique(self, event_digest: str, entry, obj):
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"""Add an entry and make sure it's unique"""
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snapshot = self.get_snapshot()
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state = self.load_state(snapshot)
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state.parents = [] if snapshot is None else [snapshot]
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state.events = [event_digest]
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state.date = datetime.now()
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if entry not in state.data:
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state.data[entry] = {obj}
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already_exist = False
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else:
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already_exist = obj in state.data[entry]
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if not already_exist:
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state.data[entry].add(obj)
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new_snapshot = self.save_state(state)
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self.set_snapshot(new_snapshot)
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return (None if already_exist else entry), None
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def set(self, event_digest, entry, obj, use_ref=False):
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"""
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Add or replace an entry. The entry is reinitialized.
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If the previous value was dict, all keys are lost
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:param event_digest:
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:param entry:
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:param obj:
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:param use_ref:
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:return:
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"""
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snapshot = self.get_snapshot()
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state = self.load_state(snapshot)
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state.parents = [] if snapshot is None else [snapshot]
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state.events = [event_digest]
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state.date = datetime.now()
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key = self.get_obj_key(obj)
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obj = self.save_ref_if_needed(use_ref, obj)
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state.data[entry] = obj if key is None else {key: obj}
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new_snapshot = self.save_state(state)
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self.set_snapshot(new_snapshot)
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return entry, key
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def modify(self, event_digest, entry, key, obj):
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"""
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Replace an element
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If the key is not provided, has the same effect than set eg, the entry is reset
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:param event_digest:
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:param entry:
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:param key: key of the object to update
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:param obj: new data
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:return:
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"""
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if key is None:
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raise SheerkaDataProviderError("Key is mandatory.", None)
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snapshot = self.get_snapshot()
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state = self.load_state(snapshot)
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if entry not in state.data:
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raise IndexError(entry)
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if key is not None and key not in state.data[entry]:
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raise IndexError(f"{entry}.{key}")
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state.parents = [] if snapshot is None else [snapshot]
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state.events = [event_digest]
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state.date = datetime.now()
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# Gets obj original key, it will help to know if the key has changed
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obj_key = self.get_obj_key(obj) or key
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if isinstance(state.data[entry][key], list):
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obj_origin = self.get_obj_origin(obj)
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if obj_origin is None:
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raise (SheerkaDataProviderError(f"Multiple entries under '{entry}.{key}'", obj))
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state.modify_in_list(entry, key, obj, obj_key, obj_origin, self.load_ref_if_needed, self.save_ref_if_needed)
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else:
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obj = self.save_ref_if_needed(self.is_reference(state.data[entry][key]), obj)
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state.modify(entry, key, obj, obj_key)
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new_snapshot = self.save_state(state)
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self.set_snapshot(new_snapshot)
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return entry, obj_key
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def list(self, entry, filter=None):
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"""
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Lists elements of entry 'entry'
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:param entry: name of the entry to list
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:param filter: filter to use
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:return: list of elements
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"""
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snapshot = self.get_snapshot()
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state = self.load_state(snapshot)
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if entry not in state.data:
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return []
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elements = state.data[entry]
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if isinstance(elements, dict):
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# manage when elements have a key
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filter_to_use = (lambda k, o: True) if filter is None else filter
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for key, element in elements.items():
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if filter_to_use(key, element):
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if isinstance(element, list):
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yield [self.load_ref_if_needed(e)[0] for e in element]
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else:
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yield self.load_ref_if_needed(element)[0]
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else:
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# manage when no key is defined for the elements
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if not isinstance(elements, list) and not isinstance(elements, set):
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elements = [elements]
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filter_to_use = (lambda o: True) if filter is None else filter
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for element in elements:
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if filter_to_use(element):
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yield self.load_ref_if_needed(element)[0]
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def remove(self, event_digest, entry, filter=None):
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"""
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Removes elements under the entry 'entry'
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:param event_digest: event that triggers the deletion
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:param entry:
|
|
:param filter: filter to use
|
|
:return: new sha256 of the state
|
|
TODO: Remove by key
|
|
"""
|
|
snapshot = self.get_snapshot()
|
|
state = self.load_state(snapshot)
|
|
|
|
if entry not in state.data:
|
|
raise IndexError(entry)
|
|
|
|
state.parents = [] if snapshot is None else [snapshot]
|
|
state.events = [event_digest]
|
|
state.date = datetime.now()
|
|
state.remove(entry, filter)
|
|
|
|
new_snapshot = self.save_state(state)
|
|
self.set_snapshot(new_snapshot)
|
|
return new_snapshot
|
|
|
|
def get(self, entry, key=None, load_origin=True):
|
|
"""
|
|
Retrieve an element by its key
|
|
:param entry:
|
|
:param key:
|
|
:return:
|
|
"""
|
|
snapshot = self.get_snapshot()
|
|
state = self.load_state(snapshot)
|
|
|
|
if entry not in state.data:
|
|
raise IndexError(entry)
|
|
|
|
if key is not None and key not in state.data[entry]:
|
|
raise IndexError(f"{entry}.{key}")
|
|
|
|
item = state.data[entry] if key is None else state.data[entry][key]
|
|
if isinstance(item, list):
|
|
return [self.load_ref_if_needed(i, load_origin)[0] for i in item]
|
|
|
|
return self.load_ref_if_needed(item, load_origin)[0]
|
|
|
|
def get_safe(self, entry, key=None, load_origin=True):
|
|
"""
|
|
Retrieve an element by its key. Return None if the element does not exist
|
|
:param entry:
|
|
:param key:
|
|
:return:
|
|
"""
|
|
snapshot = self.get_snapshot()
|
|
state = self.load_state(snapshot)
|
|
|
|
if entry not in state.data:
|
|
return None
|
|
|
|
if key is not None and key not in state.data[entry]:
|
|
return None
|
|
|
|
item = state.data[entry] if key is None else state.data[entry][key]
|
|
if isinstance(item, list):
|
|
return [self.load_ref_if_needed(i, load_origin)[0] for i in item]
|
|
|
|
return self.load_ref_if_needed(item, load_origin)[0]
|
|
|
|
def exists(self, entry, key=None, digest=None):
|
|
"""
|
|
Returns true if the entry is defined
|
|
:param key:
|
|
:param entry:
|
|
:param digest: digest of the object, when several entries share the same key
|
|
:return:
|
|
"""
|
|
snapshot = self.get_snapshot()
|
|
state = self.load_state(snapshot)
|
|
exist = entry in state.data
|
|
|
|
if not exist or key is None:
|
|
return exist
|
|
|
|
items = state.data[entry]
|
|
exist = key in items
|
|
if not exist or digest is None:
|
|
return exist
|
|
|
|
items = items[key]
|
|
if not isinstance(items, list):
|
|
items = [items]
|
|
|
|
for item in items:
|
|
item_digest = SheerkaDataProvider.get_obj_digest(item)
|
|
if item_digest == digest:
|
|
return True
|
|
|
|
return False
|
|
|
|
def save_event(self, event: Event):
|
|
"""
|
|
return an event, given its digest
|
|
:param event:
|
|
:return: digest of the event
|
|
"""
|
|
digest = event.get_digest()
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.EventFolder, digest)
|
|
if self.io.exists(target_path):
|
|
return digest
|
|
|
|
self.io.write_binary(target_path, self.serializer.serialize(event, None).read())
|
|
|
|
return digest
|
|
|
|
def load_event(self, digest):
|
|
"""
|
|
return an event, given its digest
|
|
:param digest:
|
|
:return:
|
|
"""
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.EventFolder, digest)
|
|
|
|
with self.io.open(target_path, "rb") as f:
|
|
return self.serializer.deserialize(f, None)
|
|
|
|
def save_result(self, execution_context):
|
|
"""
|
|
Save the execution context associated with an event
|
|
To make a long story short,
|
|
for every single user input, there is an event (which is the first thing that is created)
|
|
and a result (the ExecutionContext created by sheerka.evaluate_user_input()
|
|
:param execution_context:
|
|
:return:
|
|
"""
|
|
digest = execution_context.event.get_digest()
|
|
self.log.debug(f"Saving execution context. digest={digest}")
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.EventFolder, digest) + "_result"
|
|
if self.io.exists(target_path):
|
|
return digest
|
|
|
|
self.io.write_binary(target_path, self.serializer.serialize(execution_context, None).read())
|
|
return digest
|
|
|
|
def load_result(self, digest):
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.EventFolder, digest) + "_result"
|
|
|
|
with self.io.open(target_path, "rb") as f:
|
|
return self.serializer.deserialize(f, None)
|
|
|
|
def save_state(self, state: State):
|
|
digest = state.get_digest()
|
|
self.log.debug(f"Saving new state. digest={digest}")
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.StateFolder, digest)
|
|
if self.io.exists(target_path):
|
|
return digest
|
|
|
|
self.io.write_binary(target_path, self.serializer.serialize(state, None).read())
|
|
return digest
|
|
|
|
def load_state(self, digest):
|
|
if digest is None:
|
|
return State()
|
|
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.StateFolder, digest)
|
|
with self.io.open(target_path, "rb") as f:
|
|
return self.serializer.deserialize(f, None)
|
|
|
|
def save_obj(self, obj):
|
|
self.log.debug(f"Saving '{obj}' as reference...")
|
|
stream = self.serializer.serialize(obj, SerializerContext(user_name="kodjo"))
|
|
digest = obj.get_digest() if hasattr(obj, "get_digest") else self.get_stream_digest(stream)
|
|
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.ObjectsFolder, digest)
|
|
if self.io.exists(target_path):
|
|
self.log.debug(f"...already saved. digest is {digest}")
|
|
return digest
|
|
|
|
self.io.write_binary(target_path, stream.read())
|
|
|
|
self.log.debug(f"...digest={digest}.")
|
|
return digest
|
|
|
|
def load_obj(self, digest, add_origin=True):
|
|
if digest is None:
|
|
return None
|
|
|
|
target_path = self.io.get_obj_path(SheerkaDataProvider.ObjectsFolder, digest)
|
|
if not self.io.exists(target_path):
|
|
return None
|
|
|
|
with self.io.open(target_path, "rb") as f:
|
|
obj = self.serializer.deserialize(f, SerializerContext(origin=digest))
|
|
|
|
# set the origin of the object
|
|
if add_origin:
|
|
if isinstance(obj, dict):
|
|
obj[Serializer.ORIGIN] = digest
|
|
elif not isinstance(obj, str):
|
|
setattr(obj, Serializer.ORIGIN, digest)
|
|
return obj
|
|
|
|
def load_ref_if_needed(self, obj, load_origin=True):
|
|
if not isinstance(obj, str):
|
|
return obj, False
|
|
if not obj.startswith(SheerkaDataProvider.REF_PREFIX):
|
|
return obj, False
|
|
|
|
resolved = self.load_obj(obj[len(SheerkaDataProvider.REF_PREFIX):], load_origin)
|
|
if resolved is None:
|
|
return obj, False
|
|
|
|
return resolved, True
|
|
|
|
def save_ref_if_needed(self, save_ref, obj):
|
|
if not save_ref:
|
|
return obj
|
|
|
|
digest = self.save_obj(obj)
|
|
return self.REF_PREFIX + digest
|
|
|
|
def get_cache_params(self, category, key):
|
|
digest = hashlib.sha3_256(f"{category}:{key}".encode("utf-8")).hexdigest()
|
|
cache_path = self.io.get_obj_path(SheerkaDataProvider.CacheFolder, digest)
|
|
return digest, cache_path
|
|
|
|
def add_to_cache(self, category, key, obj, update=False):
|
|
"""
|
|
Save obj in the internal cache system
|
|
:param category:
|
|
:param key:
|
|
:param obj:
|
|
:param update:
|
|
:return:
|
|
"""
|
|
digest, cache_path = self.get_cache_params(category, key)
|
|
|
|
if self.io.exists(cache_path) and not update:
|
|
return digest
|
|
|
|
self.io.write_binary(cache_path, zlib.compress(obj.encode("utf-8"), 9))
|
|
return digest
|
|
|
|
def load_from_cache(self, category, key):
|
|
"""
|
|
Reload a compress object from the cache
|
|
:param category:
|
|
:param key:
|
|
:return:
|
|
"""
|
|
digest, cache_path = self.get_cache_params(category, key)
|
|
|
|
if not self.io.exists(cache_path):
|
|
raise IndexError(f"{category}.{key}")
|
|
|
|
with self.io.open(cache_path, "rb") as f:
|
|
return zlib.decompress(f.read()).decode("utf-8")
|
|
|
|
def remove_from_cache(self, category, key):
|
|
"""
|
|
|
|
:param category:
|
|
:param key:
|
|
:return:
|
|
"""
|
|
digest, cache_path = self.get_cache_params(category, key)
|
|
if self.io.exists(cache_path):
|
|
self.io.remove(cache_path)
|
|
|
|
return digest
|
|
|
|
def in_cache(self, category, key):
|
|
"""
|
|
Returns true if the key is in cache
|
|
:param category:
|
|
:param key:
|
|
:return:
|
|
"""
|
|
digest, cache_path = self.get_cache_params(category, key)
|
|
return self.io.exists(cache_path)
|
|
|
|
def get_snapshot(self):
|
|
head_file = self.io.path_join(SheerkaDataProvider.HeadFile)
|
|
if not self.io.exists(head_file):
|
|
return None
|
|
return self.io.read_text(head_file)
|
|
# with open(head_file, "r") as f:
|
|
# return f.read()
|
|
|
|
def set_snapshot(self, digest):
|
|
head_file = self.io.path_join(SheerkaDataProvider.HeadFile)
|
|
return self.io.write_text(head_file, digest)
|
|
# with open(head_file, "w") as f:
|
|
# return f.write(digest)
|
|
|
|
def load_keys(self):
|
|
keys_file = self.io.path_join(SheerkaDataProvider.KeysFile)
|
|
if not self.io.exists(keys_file):
|
|
keys = {}
|
|
else:
|
|
with self.io.open(keys_file, "r") as f:
|
|
keys = json.load(f)
|
|
return keys
|
|
|
|
def save_keys(self, keys):
|
|
keys_file = self.io.path_join(SheerkaDataProvider.KeysFile)
|
|
with self.io.open(keys_file, "w") as f:
|
|
json.dump(keys, f)
|
|
|
|
def get_next_key(self, entry):
|
|
keys = self.load_keys()
|
|
|
|
next_key = keys.get(entry, 0) + 1
|
|
keys[entry] = next_key
|
|
|
|
self.save_keys(keys)
|
|
return str(next_key)
|
|
|
|
def set_key(self, entry, value):
|
|
keys = self.load_keys()
|
|
keys[entry] = value
|
|
self.save_keys(keys)
|
|
return str(value)
|