191 lines
6.6 KiB
Python
191 lines
6.6 KiB
Python
# The core application of the Mia project.
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# by imacat <imacat@mail.imacat.idv.tw>, 2020/6/29
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# Copyright (c) 2020 imacat.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""The data models of the Mia core application.
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"""
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import hashlib
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from dirtyfields import DirtyFieldsMixin
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from django.conf import settings
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from django.db import models, connection, OperationalError, transaction
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from django.db.models.functions import Now
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from django.urls import reverse
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from mia_core.utils import get_multi_lingual_attr, set_multi_lingual_attr, \
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new_pk
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class Country(DirtyFieldsMixin, models.Model):
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"""A country."""
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id = models.PositiveIntegerField(primary_key=True, db_column="sn")
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code = models.CharField(max_length=2, unique=True, db_column="id")
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name_en = models.CharField(max_length=64)
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name_zh_hant = models.CharField(
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max_length=32, null=True, db_column="name_zhtw")
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name_zh_hans = models.CharField(
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max_length=32, null=True, db_column="name_zhcn")
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is_special = models.BooleanField(
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default=False, db_column="special")
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created_at = models.DateTimeField(
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auto_now_add=True, db_column="created")
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created_by = models.ForeignKey(
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"User", on_delete=models.PROTECT,
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db_column="createdby", related_name="created_countries")
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updated_at = models.DateTimeField(
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auto_now=True, db_column="updated")
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updated_by = models.ForeignKey(
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"User", on_delete=models.PROTECT,
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db_column="updatedby", related_name="updated_countries")
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def __str__(self):
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"""Returns the string representation of this country."""
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return self.code.__str__() + " " + self.name.__str__()
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@property
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def name(self) -> str:
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"""The country name in the current language."""
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return get_multi_lingual_attr(self, "name", "en")
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@name.setter
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def name(self, value: str) -> None:
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set_multi_lingual_attr(self, "name", value)
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class Meta:
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db_table = "country"
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class User(DirtyFieldsMixin, models.Model):
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"""A user."""
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id = models.PositiveIntegerField(primary_key=True, db_column="sn")
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login_id = models.CharField(max_length=32, unique=True, db_column="id")
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password = models.CharField(max_length=32, db_column="passwd")
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name = models.CharField(max_length=32)
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is_disabled = models.BooleanField(
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default=False, db_column="disabled")
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is_deleted = models.BooleanField(
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default=False, db_column="deleted")
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language = models.CharField(max_length=6, null=True, db_column="lang")
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visits = models.PositiveSmallIntegerField(default=0)
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visited_at = models.DateTimeField(null=True, db_column="visited")
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visited_ip = models.GenericIPAddressField(null=True, db_column="ip")
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visited_host = models.CharField(
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max_length=128, null=True, db_column="host")
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visited_country = models.ForeignKey(
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Country, on_delete=models.PROTECT, null=True,
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db_column="ct", to_field="code", related_name="users")
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created_at = models.DateTimeField(
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auto_now_add=True, db_column="created")
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created_by = models.ForeignKey(
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"self", on_delete=models.PROTECT,
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db_column="createdby", related_name="created_users")
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updated_at = models.DateTimeField(
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auto_now_add=True, db_column="updated")
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updated_by = models.ForeignKey(
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"self", on_delete=models.PROTECT,
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db_column="updatedby", related_name="updated_users")
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REQUIRED_FIELDS = ["id", "name"]
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USERNAME_FIELD = "login_id"
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.current_user = None
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@property
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def is_anonymous(self) -> bool:
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return False
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@property
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def is_authenticated(self) -> bool:
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return True
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def set_password(self):
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pass
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def check_password(self):
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pass
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def __str__(self):
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"""Returns the string representation of this user."""
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return "%s (%s)" % (
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self.name.__str__(), self.login_id.__str__())
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def save(self, force_insert=False, force_update=False, using=None,
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update_fields=None):
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if self.pk is None:
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self.pk = new_pk(User)
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if self.current_user is not None:
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self.created_by = self.current_user
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if self.current_user is not None:
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self.updated_by = self.current_user
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with transaction.atomic():
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super(User, self).save(
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force_insert=force_insert, force_update=force_update,
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using=using, update_fields=update_fields)
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User.objects.filter(pk=self.pk).update(updated_at=Now())
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def get_absolute_url(self):
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return reverse("mia_core:users.detail", args=(self,))
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class Meta:
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db_table = "users"
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app_label = "mia_core"
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def set_digest_password(self, login_id, password):
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self.password = self.md5(
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F"{login_id}:{settings.DIGEST_REALM}:{password}")
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@staticmethod
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def md5(value: str) -> str:
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m = hashlib.md5()
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m.update(value.encode("utf-8"))
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return m.hexdigest()
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def is_in_use(self) -> bool:
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"""Returns whether this user is in use.
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Returns:
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True if this user is in use, or False otherwise.
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"""
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for table in connection.introspection.table_names():
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if self._is_in_use_with(F"SELECT * FROM {table}"
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" WHERE createdby=%s OR updatedby=%s"):
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return True
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if self._is_in_use_with(
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F"SELECT * FROM {table}"
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" WHERE created_by_id=%s OR updated_by_id=%s"):
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return True
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return False
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def _is_in_use_with(self, sql: str) -> bool:
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"""Returns whether this user is in use with a specific SQL statement.
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Args:
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sql: The SQL query statement
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Returns:
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True if this user is in use, or False otherwise.
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"""
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with connection.cursor() as cursor:
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try:
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cursor.execute(sql, [self.pk, self.pk])
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except OperationalError:
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return False
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if cursor.fetchone() is None:
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return False
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return True
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