mirror of
https://github.com/suitenumerique/meet.git
synced 2026-07-26 20:08:24 +00:00
lebaudantoine
64eadadaef
Rename vague functions to explicitly indicate administrator permission checks, or owner ones. Prevents developer confusion and potential security misuse per auditor recommendations.
720 lines
23 KiB
Python
720 lines
23 KiB
Python
"""
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Declare and configure the models for the Meet core application
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"""
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import secrets
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import uuid
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from datetime import datetime, timedelta
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from logging import getLogger
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from typing import List, Optional
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from django.conf import settings
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from django.contrib.auth import models as auth_models
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from django.contrib.auth.base_user import AbstractBaseUser
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from django.core import mail, validators
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from django.core.exceptions import PermissionDenied, ValidationError
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from django.db import models
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from django.utils import timezone
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from django.utils.text import capfirst, slugify
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from django.utils.translation import gettext_lazy as _
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from timezone_field import TimeZoneField
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from .recording.enums import FileExtension
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logger = getLogger(__name__)
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class RoleChoices(models.TextChoices):
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"""Role choices."""
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MEMBER = "member", _("Member")
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ADMIN = "administrator", _("Administrator")
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OWNER = "owner", _("Owner")
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@classmethod
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def check_administrator_role(cls, role):
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"""Check if a role is administrator."""
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return role == cls.ADMIN
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@classmethod
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def check_owner_role(cls, role):
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"""Check if a role is owner."""
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return role == cls.OWNER
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class RecordingStatusChoices(models.TextChoices):
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"""Enumeration of possible states for a recording operation."""
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INITIATED = "initiated", _("Initiated")
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ACTIVE = "active", _("Active")
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STOPPED = "stopped", _("Stopped")
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SAVED = "saved", _("Saved")
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ABORTED = "aborted", _("Aborted")
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FAILED_TO_START = "failed_to_start", _("Failed to Start")
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FAILED_TO_STOP = "failed_to_stop", _("Failed to Stop")
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NOTIFICATION_SUCCEEDED = "notification_succeeded", _("Notification succeeded")
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@classmethod
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def is_final(cls, status):
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"""Determine if the recording status represents a final state.
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A final status indicates the recording flow has completed, either
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successfully or unsuccessfully.
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"""
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return status in {
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cls.STOPPED,
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cls.SAVED,
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cls.ABORTED,
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cls.FAILED_TO_START,
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cls.FAILED_TO_STOP,
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}
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@classmethod
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def is_unsuccessful(cls, status):
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"""Determine if the recording status represents an unsuccessful state."""
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return status in {cls.ABORTED, cls.FAILED_TO_START, cls.FAILED_TO_STOP}
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class RecordingModeChoices(models.TextChoices):
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"""Recording mode choices."""
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SCREEN_RECORDING = "screen_recording", _("SCREEN_RECORDING")
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TRANSCRIPT = "transcript", _("TRANSCRIPT")
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class RoomAccessLevel(models.TextChoices):
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"""Room access level choices."""
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PUBLIC = "public", _("Public Access")
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TRUSTED = "trusted", _("Trusted Access")
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RESTRICTED = "restricted", _("Restricted Access")
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class BaseModel(models.Model):
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"""
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Serves as an abstract base model for other models, ensuring that records are validated
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before saving as Django doesn't do it by default.
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Includes fields common to all models: a UUID primary key and creation/update timestamps.
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"""
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id = models.UUIDField(
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verbose_name=_("id"),
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help_text=_("primary key for the record as UUID"),
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primary_key=True,
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default=uuid.uuid4,
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editable=False,
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)
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created_at = models.DateTimeField(
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verbose_name=_("created on"),
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help_text=_("date and time at which a record was created"),
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auto_now_add=True,
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editable=False,
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)
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updated_at = models.DateTimeField(
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verbose_name=_("updated on"),
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help_text=_("date and time at which a record was last updated"),
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auto_now=True,
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editable=False,
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)
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class Meta:
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abstract = True
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def save(self, *args, **kwargs):
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"""Call `full_clean` before saving."""
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self.full_clean()
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super().save(*args, **kwargs)
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class User(AbstractBaseUser, BaseModel, auth_models.PermissionsMixin):
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"""User model to work with OIDC only authentication."""
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sub_validator = validators.RegexValidator(
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regex=r"^[\w.@+-]+\Z",
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message=_(
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"Enter a valid sub. This value may contain only letters, "
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"numbers, and @/./+/-/_ characters."
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),
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)
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sub = models.CharField(
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_("sub"),
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help_text=_(
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"Required. 255 characters or fewer. Letters, numbers, and @/./+/-/_ characters only."
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),
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max_length=255,
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unique=True,
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validators=[sub_validator],
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blank=True,
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null=True,
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)
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email = models.EmailField(_("identity email address"), blank=True, null=True)
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# Unlike the "email" field which stores the email coming from the OIDC token, this field
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# stores the email used by staff users to log in to the admin site
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admin_email = models.EmailField(
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_("admin email address"), unique=True, blank=True, null=True
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)
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full_name = models.CharField(_("full name"), max_length=100, null=True, blank=True)
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short_name = models.CharField(
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_("short name"), max_length=100, null=True, blank=True
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)
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language = models.CharField(
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max_length=10,
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choices=settings.LANGUAGES,
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default=settings.LANGUAGE_CODE,
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verbose_name=_("language"),
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help_text=_("The language in which the user wants to see the interface."),
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)
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timezone = TimeZoneField(
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choices_display="WITH_GMT_OFFSET",
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use_pytz=False,
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default=settings.TIME_ZONE,
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help_text=_("The timezone in which the user wants to see times."),
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)
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is_device = models.BooleanField(
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_("device"),
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default=False,
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help_text=_("Whether the user is a device or a real user."),
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)
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is_staff = models.BooleanField(
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_("staff status"),
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default=False,
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help_text=_("Whether the user can log into this admin site."),
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)
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is_active = models.BooleanField(
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_("active"),
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default=True,
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help_text=_(
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"Whether this user should be treated as active. "
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"Unselect this instead of deleting accounts."
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),
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)
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objects = auth_models.UserManager()
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USERNAME_FIELD = "admin_email"
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REQUIRED_FIELDS = []
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class Meta:
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db_table = "meet_user"
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ordering = ("-created_at",)
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verbose_name = _("user")
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verbose_name_plural = _("users")
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def __str__(self):
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return self.email or self.admin_email or str(self.id)
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def email_user(self, subject, message, from_email=None, **kwargs):
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"""Email this user."""
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if not self.email:
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raise ValueError("User has no email address.")
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mail.send_mail(subject, message, from_email, [self.email], **kwargs)
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def get_teams(self):
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"""
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Get list of teams in which the user is, as a list of strings.
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Must be cached if retrieved remotely.
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"""
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return []
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def get_resource_roles(resource: models.Model, user: User) -> List[str]:
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"""
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Get all roles assigned to a user for a specific resource, including team-based roles.
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Args:
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resource: The resource to check permissions for
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user: The user to get roles for
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Returns:
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List of role strings assigned to the user
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"""
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if not user.is_authenticated:
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return []
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# Use pre-annotated roles if available from viewset optimization
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if hasattr(resource, "user_roles"):
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return resource.user_roles or []
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try:
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return list(
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resource.accesses.filter_user(user)
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.values_list("role", flat=True)
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.distinct()
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)
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except (IndexError, models.ObjectDoesNotExist):
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return []
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class Resource(BaseModel):
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"""Model to define access control"""
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users = models.ManyToManyField(
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User,
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through="ResourceAccess",
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through_fields=("resource", "user"),
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related_name="resources",
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)
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class Meta:
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db_table = "meet_resource"
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verbose_name = _("Resource")
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verbose_name_plural = _("Resources")
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def __str__(self):
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try:
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return self.name
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except AttributeError:
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return f"Resource {self.id!s}"
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def get_role(self, user):
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"""
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Determine the role of a given user in this resource.
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"""
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if not user or not user.is_authenticated:
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return None
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role = None
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for access in self.accesses.filter(user=user):
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if access.role == RoleChoices.OWNER:
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return RoleChoices.OWNER
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if access.role == RoleChoices.ADMIN:
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role = RoleChoices.ADMIN
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if access.role == RoleChoices.MEMBER and role != RoleChoices.ADMIN:
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role = RoleChoices.MEMBER
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return role
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def is_administrator_or_owner(self, user):
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"""
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Check if a user is administrator or owner of the resource."""
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role = self.get_role(user)
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return RoleChoices.check_administrator_role(
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role
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) or RoleChoices.check_owner_role(role)
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def is_owner(self, user):
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"""Check if a user is owner of the resource."""
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return RoleChoices.check_owner_role(self.get_role(user))
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class ResourceAccess(BaseModel):
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"""Link table between resources and users"""
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resource = models.ForeignKey(
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Resource,
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on_delete=models.CASCADE,
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related_name="accesses",
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)
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user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="accesses")
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role = models.CharField(
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max_length=20, choices=RoleChoices.choices, default=RoleChoices.MEMBER
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)
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class Meta:
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db_table = "meet_resource_access"
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ordering = ("-created_at",)
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verbose_name = _("Resource access")
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verbose_name_plural = _("Resource accesses")
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constraints = [
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models.UniqueConstraint(
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fields=["user", "resource"],
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name="resource_access_unique_user_resource",
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violation_error_message=_(
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"Resource access with this User and Resource already exists."
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),
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),
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]
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def __str__(self):
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role = capfirst(self.get_role_display())
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try:
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resource = self.resource.name
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except AttributeError:
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resource = f"resource {self.resource_id!s}"
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return f"{role:s} role for {self.user!s} on {resource:s}"
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def save(self, *args, **kwargs):
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"""Make sure we keep at least one owner for the resource."""
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if self.pk and self.role != RoleChoices.OWNER:
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accesses = self._meta.model.objects.filter(
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resource=self.resource, role=RoleChoices.OWNER
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).only("pk")
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if len(accesses) == 1 and accesses[0].pk == self.pk:
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raise PermissionDenied("A resource should keep at least one owner.")
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return super().save(*args, **kwargs)
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def delete(self, *args, **kwargs):
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"""Disallow deleting the last of the Mohicans."""
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if (
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self.role == RoleChoices.OWNER
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and self._meta.model.objects.filter(
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resource=self.resource, role=RoleChoices.OWNER
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).count()
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== 1
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):
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raise PermissionDenied("A resource should keep at least one owner.")
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return super().delete(*args, **kwargs)
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class Room(Resource):
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"""Model for one room"""
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name = models.CharField(max_length=500)
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resource = models.OneToOneField(
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Resource,
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on_delete=models.CASCADE,
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parent_link=True,
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primary_key=True,
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)
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slug = models.SlugField(max_length=100, blank=True, null=True, unique=True)
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access_level = models.CharField(
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max_length=50,
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choices=RoomAccessLevel.choices,
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default=settings.RESOURCE_DEFAULT_ACCESS_LEVEL,
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)
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configuration = models.JSONField(
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blank=True,
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default=dict,
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verbose_name=_("Visio room configuration"),
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help_text=_("Values for Visio parameters to configure the room."),
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)
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pin_code = models.CharField(
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max_length=None,
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unique=True,
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blank=True,
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null=True,
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verbose_name=_("Room PIN code"),
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help_text=_("Unique n-digit code that identifies this room in telephony mode."),
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)
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class Meta:
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db_table = "meet_room"
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ordering = ("name",)
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verbose_name = _("Room")
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verbose_name_plural = _("Rooms")
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def __str__(self):
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return capfirst(self.name)
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def save(self, *args, **kwargs):
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"""Generate a unique n-digit pin code for new rooms."""
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if settings.ROOM_TELEPHONY_ENABLED and not self.pk and not self.pin_code:
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self.pin_code = self.generate_unique_pin_code(
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length=settings.ROOM_TELEPHONY_PIN_LENGTH
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)
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super().save(*args, **kwargs)
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def clean_fields(self, exclude=None):
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"""
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Automatically generate the slug from the name and make sure it does not look like a UUID.
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We don't want any overlapping between the `slug` and the `id` fields because they can
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both be used to get a room detail view on the API.
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"""
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self.slug = slugify(self.name)
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try:
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uuid.UUID(self.slug)
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except ValueError:
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pass
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else:
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raise ValidationError({"name": f'Room name "{self.name:s}" is reserved.'})
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super().clean_fields(exclude=exclude)
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@property
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def is_public(self):
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"""Check if a room is public"""
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return self.access_level == RoomAccessLevel.PUBLIC
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@staticmethod
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def generate_unique_pin_code(length):
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"""Generate a unique n-digit PIN code"""
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if length < 4:
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raise ValueError(
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"PIN code length must be at least 4 digits for minimal security"
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)
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max_value = 10**length
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for _ in range(settings.ROOM_TELEPHONY_PIN_MAX_RETRIES):
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pin_code = str(secrets.randbelow(max_value)).zfill(length)
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if not Room.objects.filter(pin_code=pin_code).exists():
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return pin_code
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# Log a warning as a temporary measure until backend observability is implemented.
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logger.warning(
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"Failed to generate unique PIN code of length %s after %s attempts",
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length,
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settings.ROOM_TELEPHONY_PIN_MAX_RETRIES,
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)
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return None
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class BaseAccessManager(models.Manager):
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"""Base manager for handling resource access control."""
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def filter_user(self, user):
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"""Filter accesses for a given user, including both direct and team-based access."""
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return self.filter(models.Q(user=user) | models.Q(team__in=user.get_teams()))
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class BaseAccess(BaseModel):
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"""Base model for accesses to handle resources."""
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user = models.ForeignKey(
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User,
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on_delete=models.CASCADE,
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null=True,
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blank=True,
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)
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team = models.CharField(max_length=100, blank=True)
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role = models.CharField(
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max_length=20, choices=RoleChoices.choices, default=RoleChoices.MEMBER
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)
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objects = BaseAccessManager()
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class Meta:
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abstract = True
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def _get_abilities(self, resource, user):
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"""
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Compute and return abilities for a given user taking into account
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the current state of the object.
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"""
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roles = get_resource_roles(resource, user)
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is_owner = RoleChoices.OWNER in roles
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has_privileges = is_owner or RoleChoices.ADMIN in roles
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# Default values for unprivileged users
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set_role_to = set()
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can_delete = False
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# Special handling when modifying an owner's access
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if self.role == RoleChoices.OWNER:
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# Prevent orphaning the resource
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can_delete = (
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is_owner
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and resource.accesses.filter(role=RoleChoices.OWNER).count() > 1
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)
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if can_delete:
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set_role_to = {RoleChoices.ADMIN, RoleChoices.OWNER, RoleChoices.MEMBER}
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elif has_privileges:
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can_delete = True
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set_role_to = {RoleChoices.ADMIN, RoleChoices.MEMBER}
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if is_owner:
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set_role_to.add(RoleChoices.OWNER)
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# Remove the current role as we don't want to propose it as an option
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set_role_to.discard(self.role)
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return {
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"destroy": can_delete,
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"update": bool(set_role_to),
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"partial_update": bool(set_role_to),
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"retrieve": bool(roles),
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"set_role_to": sorted(r.value for r in set_role_to),
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}
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class Recording(BaseModel):
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"""Model for recordings that take place in a room.
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Recording Status Flow:
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1. INITIATED: Initial state when recording is requested
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2. ACTIVE: Recording is currently in progress
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3. STOPPED: Recording has been stopped by user/system
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4. SAVED: Recording has been successfully processed and stored
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4. NOTIFICATION_SUCCEEDED: External service has been notified of this recording
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Error States:
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- FAILED_TO_START: Worker failed to initialize recording
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- FAILED_TO_STOP: Worker failed during stop operation
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- ABORTED: Recording was terminated before completion
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|
|
Warning: Worker failures may lead to database inconsistency between the actual
|
|
recording state and its status in the database.
|
|
"""
|
|
|
|
room = models.ForeignKey(
|
|
Room,
|
|
on_delete=models.CASCADE,
|
|
related_name="recordings",
|
|
verbose_name=_("Room"),
|
|
)
|
|
status = models.CharField(
|
|
max_length=50,
|
|
choices=RecordingStatusChoices.choices,
|
|
default=RecordingStatusChoices.INITIATED,
|
|
)
|
|
worker_id = models.CharField(
|
|
max_length=255,
|
|
null=True,
|
|
blank=True,
|
|
verbose_name=_("Worker ID"),
|
|
help_text=_(
|
|
"Enter an identifier for the worker recording."
|
|
"This ID is retained even when the worker stops, allowing for easy tracking."
|
|
),
|
|
)
|
|
mode = models.CharField(
|
|
max_length=20,
|
|
choices=RecordingModeChoices.choices,
|
|
default=RecordingModeChoices.SCREEN_RECORDING,
|
|
verbose_name=_("Recording mode"),
|
|
help_text=_("Defines the mode of recording being called."),
|
|
)
|
|
|
|
class Meta:
|
|
db_table = "meet_recording"
|
|
ordering = ("-created_at",)
|
|
verbose_name = _("Recording")
|
|
verbose_name_plural = _("Recordings")
|
|
constraints = [
|
|
models.UniqueConstraint(
|
|
fields=["room"],
|
|
condition=models.Q(
|
|
status__in=[
|
|
RecordingStatusChoices.ACTIVE,
|
|
RecordingStatusChoices.INITIATED,
|
|
]
|
|
),
|
|
name="unique_initiated_or_active_recording_per_room",
|
|
)
|
|
]
|
|
|
|
def __str__(self):
|
|
return f"Recording {self.id} ({self.status})"
|
|
|
|
def get_abilities(self, user):
|
|
"""Compute and return abilities for a given user on the recording."""
|
|
|
|
roles = set(get_resource_roles(self, user))
|
|
|
|
is_owner_or_admin = bool(
|
|
roles.intersection({RoleChoices.OWNER, RoleChoices.ADMIN})
|
|
)
|
|
|
|
is_final_status = RecordingStatusChoices.is_final(self.status)
|
|
|
|
return {
|
|
"destroy": is_owner_or_admin and is_final_status,
|
|
"partial_update": False,
|
|
"retrieve": is_owner_or_admin,
|
|
"stop": is_owner_or_admin and not is_final_status,
|
|
"update": False,
|
|
}
|
|
|
|
def is_savable(self) -> bool:
|
|
"""Determine if the recording can be saved based on its current status."""
|
|
|
|
return self.status in {
|
|
RecordingStatusChoices.ACTIVE,
|
|
RecordingStatusChoices.STOPPED,
|
|
}
|
|
|
|
@property
|
|
def is_saved(self) -> bool:
|
|
"""Check if the recording is in a saved state."""
|
|
return self.status in {
|
|
RecordingStatusChoices.NOTIFICATION_SUCCEEDED,
|
|
RecordingStatusChoices.SAVED,
|
|
}
|
|
|
|
@property
|
|
def extension(self):
|
|
"""Get recording extension based on its mode."""
|
|
extensions = {
|
|
RecordingModeChoices.TRANSCRIPT: FileExtension.OGG.value,
|
|
RecordingModeChoices.SCREEN_RECORDING: FileExtension.MP4.value,
|
|
}
|
|
return extensions.get(self.mode, FileExtension.MP4.value)
|
|
|
|
@property
|
|
def key(self):
|
|
"""Generate the file key based on recording mode."""
|
|
|
|
return f"{settings.RECORDING_OUTPUT_FOLDER}/{self.id}.{self.extension}"
|
|
|
|
@property
|
|
def expired_at(self) -> Optional[datetime]:
|
|
"""
|
|
Calculate the expiration date based on created_at and RECORDING_EXPIRATION_DAYS.
|
|
Returns None if no expiration is configured.
|
|
|
|
Note: This is a naive and imperfect implementation since recordings are actually
|
|
saved to the bucket after created_at timestamp is set. The actual expiration
|
|
will be determined by the bucket lifecycle policy which operates on the object's
|
|
timestamp in the storage system, not this value.
|
|
"""
|
|
|
|
if not settings.RECORDING_EXPIRATION_DAYS:
|
|
return None
|
|
|
|
return self.created_at + timedelta(days=settings.RECORDING_EXPIRATION_DAYS)
|
|
|
|
@property
|
|
def is_expired(self) -> bool:
|
|
"""
|
|
Determine if the recording has expired by comparing expired_at with current UTC time.
|
|
Returns False if no expiration is configured or if expiration date is in the future.
|
|
"""
|
|
if not self.expired_at:
|
|
return False
|
|
|
|
return self.expired_at < timezone.now()
|
|
|
|
|
|
class RecordingAccess(BaseAccess):
|
|
"""Relation model to give access to a recording for a user or a team with a role."""
|
|
|
|
recording = models.ForeignKey(
|
|
Recording,
|
|
on_delete=models.CASCADE,
|
|
related_name="accesses",
|
|
)
|
|
|
|
class Meta:
|
|
db_table = "meet_recording_access"
|
|
ordering = ("-created_at",)
|
|
verbose_name = _("Recording/user relation")
|
|
verbose_name_plural = _("Recording/user relations")
|
|
constraints = [
|
|
models.UniqueConstraint(
|
|
fields=["user", "recording"],
|
|
condition=models.Q(user__isnull=False), # Exclude null users
|
|
name="unique_recording_user",
|
|
violation_error_message=_("This user is already in this recording."),
|
|
),
|
|
models.UniqueConstraint(
|
|
fields=["team", "recording"],
|
|
condition=models.Q(team__gt=""), # Exclude empty string teams
|
|
name="unique_recording_team",
|
|
violation_error_message=_("This team is already in this recording."),
|
|
),
|
|
models.CheckConstraint(
|
|
condition=models.Q(user__isnull=False, team="")
|
|
| models.Q(user__isnull=True, team__gt=""),
|
|
name="check_recording_access_either_user_or_team",
|
|
violation_error_message=_("Either user or team must be set, not both."),
|
|
),
|
|
]
|
|
|
|
def __str__(self):
|
|
return f"{self.user!s} is {self.role:s} in {self.recording!s}"
|
|
|
|
def get_abilities(self, user):
|
|
"""
|
|
Compute and return abilities for a given user on the recording access.
|
|
"""
|
|
return self._get_abilities(self.recording, user)
|