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https://github.com/aljazceru/python-teos.git
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118 lines
3.8 KiB
Python
118 lines
3.8 KiB
Python
import json
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from common.db_manager import DBManager
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from common.tools import is_compressed_pk
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class TowersDBM(DBManager):
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"""
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The :class:`TowersDBM` is in charge of interacting with the towers database (``LevelDB``).
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Keys and values are stored as bytes in the database but processed as strings by the manager.
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Args:
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db_path (:obj:`str`): the path (relative or absolute) to the system folder containing the database. A fresh
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database will be created if the specified path does not contain one.
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Raises:
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:obj:`ValueError`: If the provided ``db_path`` is not a string.
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:obj:`plyvel.Error`: If the db is currently unavailable (being used by another process).
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"""
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def __init__(self, db_path, plugin):
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if not isinstance(db_path, str):
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raise ValueError("db_path must be a valid path/name")
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super().__init__(db_path)
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self.plugin = plugin
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def store_tower_record(self, tower_id, tower_data):
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"""
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Stores a tower record to the database. ``tower_id`` is used as identifier.
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Args:
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tower_id (:obj:`str`): a 33-byte hex-encoded string identifying the tower.
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tower_data (:obj:`dict`): the tower associated data, as a dictionary.
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Returns:
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:obj:`bool`: True if the tower record was stored in the database, False otherwise.
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"""
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if is_compressed_pk(tower_id):
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try:
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self.create_entry(tower_id, json.dumps(tower_data.to_dict()))
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self.plugin.log(f"Adding tower to Tower's db (id={tower_id})")
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return True
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except (json.JSONDecodeError, TypeError):
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self.plugin.log(
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f"Could't add tower to db. Wrong tower data format (tower_id={tower_id}, tower_data={tower_data.to_dict()})"
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)
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return False
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else:
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self.plugin.log(
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f"Could't add user to db. Wrong pk format (tower_id={tower_id}, tower_data={tower_data.to_dict()})"
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)
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return False
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def load_tower_record(self, tower_id):
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"""
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Loads a tower record from the database using the ``tower_id`` as identifier.
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Args:
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tower_id (:obj:`str`): a 33-byte hex-encoded string identifying the tower.
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Returns:
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:obj:`dict`: A dictionary containing the tower data if the ``key`` is found.
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Returns ``None`` otherwise.
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"""
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try:
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data = self.load_entry(tower_id)
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data = json.loads(data)
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except (TypeError, json.decoder.JSONDecodeError):
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data = None
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return data
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def delete_tower_record(self, tower_id):
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"""
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Deletes a tower record from the database.
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Args:
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tower_id (:obj:`str`): a 33-byte hex-encoded string identifying the tower.
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Returns:
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:obj:`bool`: True if the tower was deleted from the database or it was non-existent, False otherwise.
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"""
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try:
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self.delete_entry(tower_id)
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self.plugin.log(f"Deleting tower from Tower's db (id={tower_id})")
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return True
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except TypeError:
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self.plugin.log(f"Cannot delete user from db, user key has wrong type (id={tower_id})")
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return False
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def load_all_tower_records(self):
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"""
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Loads all tower records from the database.
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Returns:
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:obj:`dict`: A dictionary containing all tower records indexed by ``tower_id``.
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Returns an empty dictionary if no data is found.
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"""
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data = {}
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for k, v in self.db.iterator():
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# Get uuid and appointment_data from the db
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tower_id = k.decode("utf-8")
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data[tower_id] = json.loads(v)
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return data
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