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Add initial database schema and infrastructure components
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58
imagemonk/database/__init__.py
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imagemonk/database/__init__.py
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import logging
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from typing import Tuple
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import peewee
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from imagemonk import constants
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from imagemonk.configuration import ImageMonkConfig
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from imagemonk.database._shared import ImageMonkModel
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from imagemonk.database._shared import INTERFACE as interface
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from imagemonk.database.image import ImageRecord
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from imagemonk.database.thumbnail import ThumbnailRecord
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MODELS: Tuple[ImageMonkModel, ...] = (ImageRecord, ThumbnailRecord)
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def initialize(config: ImageMonkConfig):
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"""Initialize the database interface
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Defining the database as an
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`unconfigured proxy object <http://docs.peewee-orm.com/en/latest/peewee/database.html#setting-the-database-at-run-time>`_
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allows it to be configured at runtime based on the config values.
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:param config: Populated configuration container object
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"""
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logger = logging.getLogger(__name__)
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if config.database.backend == constants.SupportedDatabaseBackend.SQLITE:
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logger.debug("Using SQLite database backend")
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logger.debug(f"Applying SQLite pragmas: {config.database.sqlite.pragmas}")
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database = peewee.SqliteDatabase(
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config.database.sqlite.path, pragmas=config.database.sqlite.pragmas
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)
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elif config.database.backend == constants.SupportedDatabaseBackend.MARIADB:
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logger.debug("Using MariaDB database backend")
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logger.debug(
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"Configuring MariaDB:"
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f" {config.database.mariadb.username}@{config.database.mariadb.hostname}:{config.database.mariadb.port},"
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f" with database '{config.database.mariadb.schema}'"
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)
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database = peewee.MySQLDatabase(
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config.database.mariadb.schema,
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host=config.database.mariadb.hostname,
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port=config.database.mariadb.port,
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user=config.database.mariadb.username,
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password=config.database.mariadb.password,
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charset="utf8mb4",
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)
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else:
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raise ValueError(
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f"Invalid storage backend in configuration: {config.database.backend}"
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)
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interface.initialize(database)
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with interface.atomic():
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interface.create_tables(MODELS)
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15
imagemonk/database/_shared.py
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imagemonk/database/_shared.py
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import datetime
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import uuid
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import peewee
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INTERFACE = peewee.DatabaseProxy()
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class ImageMonkModel(peewee.Model):
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class Meta: # pylint: disable=too-few-public-methods,missing-class-docstring
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database = INTERFACE
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uuid = peewee.UUIDField(null=False, unique=True, default=uuid.uuid4)
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created = peewee.DateTimeField(null=False, default=datetime.datetime.utcnow)
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30
imagemonk/database/image.py
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imagemonk/database/image.py
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import json
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import uuid
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from typing import List
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import peewee
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from imagemonk.database._shared import ImageMonkModel
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class ImageRecord(ImageMonkModel):
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"""Database record for"""
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width = peewee.IntegerField(null=False)
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height = peewee.IntegerField(null=False)
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format = peewee.CharField(null=False)
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deleted = peewee.BooleanField(null=False, default=False)
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public = peewee.BooleanField(null=False, default=False)
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owner = peewee.UUIDField(null=False)
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sha256 = peewee.CharField(null=False)
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_readable = peewee.CharField(null=False, default="[]")
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@property
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def readable(self) -> List[uuid.UUID]:
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"""List of UUIDs corresponding to accounts that can read the file"""
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return [uuid.UUID(item) for item in json.loads(self._readable)]
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@readable.setter
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def readable(self, value: List[uuid.UUID]):
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"""Update the list of UUIDs for accounts that can read the file"""
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self._readable = json.dumps([str(item) for item in value])
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11
imagemonk/database/thumbnail.py
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imagemonk/database/thumbnail.py
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import peewee
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from imagemonk.database._shared import ImageMonkModel
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from imagemonk.database.image import ImageRecord
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class ThumbnailRecord(ImageMonkModel):
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parent = peewee.ForeignKeyField(ImageRecord)
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width = peewee.IntegerField(null=False)
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height = peewee.IntegerField(null=False)
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