✨(project) first proof of concept printing pdf from markdown
This is a boilerplate inspired from https://github.com/openfun/joanie
This commit is contained in:
Samuel Paccoud - DINUM
393
src/backend/core/models.py
Normal file
393
src/backend/core/models.py
Normal file
@@ -0,0 +1,393 @@
|
||||
"""
|
||||
Declare and configure the models for the publish core application
|
||||
"""
|
||||
import json
|
||||
import os
|
||||
import textwrap
|
||||
import uuid
|
||||
|
||||
from django.conf import settings
|
||||
from django.contrib.auth import models as auth_models
|
||||
from django.contrib.auth.base_user import AbstractBaseUser
|
||||
from django.core import exceptions, mail, validators
|
||||
from django.db import models
|
||||
from django.utils.functional import lazy
|
||||
from django.utils.translation import gettext_lazy as _
|
||||
|
||||
from django.template.base import Template as DjangoTemplate
|
||||
from django.template.context import Context
|
||||
from django.template.engine import Engine
|
||||
|
||||
import markdown
|
||||
from weasyprint import CSS, HTML
|
||||
from weasyprint.text.fonts import FontConfiguration
|
||||
|
||||
import jsonschema
|
||||
from rest_framework_simplejwt.exceptions import InvalidToken
|
||||
from rest_framework_simplejwt.settings import api_settings
|
||||
from timezone_field import TimeZoneField
|
||||
|
||||
|
||||
class RoleChoices(models.TextChoices):
|
||||
"""Defines the possible roles a user can have in a template."""
|
||||
|
||||
MEMBER = "member", _("Member")
|
||||
ADMIN = "administrator", _("Administrator")
|
||||
OWNER = "owner", _("Owner")
|
||||
|
||||
|
||||
class BaseModel(models.Model):
|
||||
"""
|
||||
Serves as an abstract base model for other models, ensuring that records are validated
|
||||
before saving as Django doesn't do it by default.
|
||||
|
||||
Includes fields common to all models: a UUID primary key and creation/update timestamps.
|
||||
"""
|
||||
|
||||
id = models.UUIDField(
|
||||
verbose_name=_("id"),
|
||||
help_text=_("primary key for the record as UUID"),
|
||||
primary_key=True,
|
||||
default=uuid.uuid4,
|
||||
editable=False,
|
||||
)
|
||||
created_at = models.DateTimeField(
|
||||
verbose_name=_("created on"),
|
||||
help_text=_("date and time at which a record was created"),
|
||||
auto_now_add=True,
|
||||
editable=False,
|
||||
)
|
||||
updated_at = models.DateTimeField(
|
||||
verbose_name=_("updated on"),
|
||||
help_text=_("date and time at which a record was last updated"),
|
||||
auto_now=True,
|
||||
editable=False,
|
||||
)
|
||||
|
||||
class Meta:
|
||||
abstract = True
|
||||
|
||||
def save(self, *args, **kwargs):
|
||||
"""Call `full_clean` before saving."""
|
||||
self.full_clean()
|
||||
super().save(*args, **kwargs)
|
||||
|
||||
|
||||
class User(AbstractBaseUser, BaseModel, auth_models.PermissionsMixin):
|
||||
"""User model to work with OIDC only authentication."""
|
||||
|
||||
email = models.EmailField(_("email address"), unique=True)
|
||||
language = models.CharField(
|
||||
max_length=10,
|
||||
choices=lazy(lambda: settings.LANGUAGES, tuple)(),
|
||||
default=settings.LANGUAGE_CODE,
|
||||
verbose_name=_("language"),
|
||||
help_text=_("The language in which the user wants to see the interface."),
|
||||
)
|
||||
timezone = TimeZoneField(
|
||||
choices_display="WITH_GMT_OFFSET",
|
||||
use_pytz=False,
|
||||
default=settings.TIME_ZONE,
|
||||
help_text=_("The timezone in which the user wants to see times."),
|
||||
)
|
||||
is_device = models.BooleanField(
|
||||
_("device"),
|
||||
default=False,
|
||||
help_text=_("Whether the user is a device or a real user."),
|
||||
)
|
||||
is_staff = models.BooleanField(
|
||||
_("staff status"),
|
||||
default=False,
|
||||
help_text=_("Whether the user can log into this admin site."),
|
||||
)
|
||||
is_active = models.BooleanField(
|
||||
_("active"),
|
||||
default=True,
|
||||
help_text=_(
|
||||
"Whether this user should be treated as active. "
|
||||
"Unselect this instead of deleting accounts."
|
||||
),
|
||||
)
|
||||
|
||||
objects = auth_models.UserManager()
|
||||
|
||||
USERNAME_FIELD = "email"
|
||||
REQUIRED_FIELDS = []
|
||||
|
||||
class Meta:
|
||||
db_table = "publish_user"
|
||||
verbose_name = _("user")
|
||||
verbose_name_plural = _("users")
|
||||
|
||||
|
||||
class Identity(BaseModel):
|
||||
"""User identity"""
|
||||
|
||||
sub_validator = validators.RegexValidator(
|
||||
regex=r"^[\w.@+-]+\Z",
|
||||
message=_(
|
||||
"Enter a valid sub. This value may contain only letters, "
|
||||
"numbers, and @/./+/-/_ characters."
|
||||
),
|
||||
)
|
||||
|
||||
user = models.ForeignKey(User, related_name="identities", on_delete=models.CASCADE)
|
||||
sub = models.CharField(
|
||||
_("sub"),
|
||||
help_text=_(
|
||||
"Required. 255 characters or fewer. Letters, numbers, and @/./+/-/_ characters only."
|
||||
),
|
||||
max_length=255,
|
||||
unique=True,
|
||||
validators=[sub_validator],
|
||||
blank=True,
|
||||
null=True,
|
||||
)
|
||||
email = models.EmailField(_("email address"))
|
||||
is_main = models.BooleanField(
|
||||
_("main"),
|
||||
default=False,
|
||||
help_text=_("Designates whether the email is the main one."),
|
||||
)
|
||||
|
||||
class Meta:
|
||||
db_table = "publish_identity"
|
||||
ordering = ("-is_main", "email")
|
||||
verbose_name = _("identity")
|
||||
verbose_name_plural = _("identities")
|
||||
constraints = [
|
||||
# Uniqueness
|
||||
models.UniqueConstraint(
|
||||
fields=["user", "email"],
|
||||
name="unique_user_email",
|
||||
violation_error_message=_(
|
||||
"This email address is already declared for this user."
|
||||
),
|
||||
),
|
||||
]
|
||||
|
||||
def __str__(self):
|
||||
main_str = "[main]" if self.is_main else ""
|
||||
return f"{self.email:s}{main_str:s}"
|
||||
|
||||
def clean(self):
|
||||
"""Normalize the email field and clean the 'is_main' field."""
|
||||
self.email = User.objects.normalize_email(self.email)
|
||||
if not self.user.identities.exclude(pk=self.pk).filter(is_main=True).exists():
|
||||
if not self.created_at:
|
||||
self.is_main = True
|
||||
elif not self.is_main:
|
||||
raise exceptions.ValidationError(
|
||||
{"is_main": "A user should have one and only one main identity."}
|
||||
)
|
||||
super().clean()
|
||||
|
||||
def save(self, *args, **kwargs):
|
||||
"""Ensure users always have one and only one main identity."""
|
||||
super().save(*args, **kwargs)
|
||||
if self.is_main is True:
|
||||
self.user.identities.exclude(id=self.id).update(is_main=False)
|
||||
|
||||
|
||||
class Team(BaseModel):
|
||||
"""Team used for role based access control when matched with teams in OIDC tokens."""
|
||||
|
||||
name = models.CharField(max_length=100)
|
||||
|
||||
class Meta:
|
||||
db_table = "publish_role"
|
||||
ordering = ("name",)
|
||||
verbose_name = _("Team")
|
||||
verbose_name_plural = _("Teams")
|
||||
|
||||
def __str__(self):
|
||||
return self.name
|
||||
|
||||
|
||||
class Template(BaseModel):
|
||||
"""HTML and CSS code used for formatting the print around the MarkDown body."""
|
||||
|
||||
title = models.CharField(_("title"), max_length=255)
|
||||
description = models.TextField(_("description"), blank=True)
|
||||
code = models.TextField(_("code"), blank=True)
|
||||
css = models.TextField(_("css"), blank=True)
|
||||
is_public = models.BooleanField(
|
||||
_("public"),
|
||||
default=False,
|
||||
help_text=_("Whether this template is public for anyone to use."),
|
||||
)
|
||||
|
||||
class Meta:
|
||||
db_table = "publish_template"
|
||||
ordering = ("title",)
|
||||
verbose_name = _("Template")
|
||||
verbose_name_plural = _("Templates")
|
||||
|
||||
def __str__(self):
|
||||
return self.title
|
||||
|
||||
|
||||
if not self.body:
|
||||
return ""
|
||||
return markdown.markdown(textwrap.dedent(self.body))
|
||||
|
||||
def generate_document(self, body):
|
||||
"""
|
||||
Generate and return a PDF document for this template around the
|
||||
markdown body passed as argument.
|
||||
"""
|
||||
body_html = markdown.markdown(textwrap.dedent(body)) if body else ""
|
||||
document_html = HTML(string=DjangoTemplate(self.code).render(Context({"body": body_html})))
|
||||
css = CSS(
|
||||
string=self.css,
|
||||
font_config=FontConfiguration(),
|
||||
)
|
||||
return document_html.write_pdf(stylesheets=[css], zoom=1)
|
||||
|
||||
|
||||
def get_abilities(self, user):
|
||||
"""
|
||||
Compute and return abilities for a given user on the template.
|
||||
"""
|
||||
is_owner_or_admin = False
|
||||
role = None
|
||||
|
||||
if user.is_authenticated:
|
||||
try:
|
||||
role = self.user_role
|
||||
except AttributeError:
|
||||
try:
|
||||
role = self.accesses.filter(user=user).values("role")[0]["role"]
|
||||
except (TemplateAccess.DoesNotExist, IndexError):
|
||||
role = None
|
||||
|
||||
is_owner_or_admin = role in [RoleChoices.OWNER, RoleChoices.ADMIN]
|
||||
|
||||
return {
|
||||
"get": True,
|
||||
"patch": is_owner_or_admin,
|
||||
"put": is_owner_or_admin,
|
||||
"delete": role == RoleChoices.OWNER,
|
||||
"manage_accesses": is_owner_or_admin,
|
||||
}
|
||||
|
||||
|
||||
class TemplateAccess(BaseModel):
|
||||
"""Link table between templates and contacts."""
|
||||
|
||||
template = models.ForeignKey(
|
||||
Template,
|
||||
on_delete=models.CASCADE,
|
||||
related_name="accesses",
|
||||
)
|
||||
user = models.ForeignKey(
|
||||
User,
|
||||
on_delete=models.CASCADE,
|
||||
related_name="accesses",
|
||||
null=True,
|
||||
blank=True,
|
||||
)
|
||||
team = models.ForeignKey(
|
||||
Team,
|
||||
on_delete=models.CASCADE,
|
||||
related_name="accesses",
|
||||
null=True,
|
||||
blank=True,
|
||||
)
|
||||
role = models.CharField(
|
||||
max_length=20, choices=RoleChoices.choices, default=RoleChoices.MEMBER
|
||||
)
|
||||
|
||||
class Meta:
|
||||
db_table = "publish_template_access"
|
||||
verbose_name = _("Template/user relation")
|
||||
verbose_name_plural = _("Template/user relations")
|
||||
constraints = [
|
||||
models.UniqueConstraint(
|
||||
fields=["user", "template"],
|
||||
name="unique_template_user",
|
||||
violation_error_message=_("This user is already in this template."),
|
||||
),
|
||||
models.UniqueConstraint(
|
||||
fields=["team", "template"],
|
||||
name="unique_template_team",
|
||||
violation_error_message=_("This team is already in this template."),
|
||||
),
|
||||
]
|
||||
|
||||
def __str__(self):
|
||||
return f"{self.user!s} is {self.role:s} in template {self.template!s}"
|
||||
|
||||
def get_abilities(self, user):
|
||||
"""
|
||||
Compute and return abilities for a given user taking into account
|
||||
the current state of the object.
|
||||
"""
|
||||
is_template_owner_or_admin = False
|
||||
role = None
|
||||
|
||||
if user.is_authenticated:
|
||||
try:
|
||||
role = self.user_role
|
||||
except AttributeError:
|
||||
try:
|
||||
role = self._meta.model.objects.filter(
|
||||
template=self.template_id, user=user
|
||||
).values("role")[0]["role"]
|
||||
except (self._meta.model.DoesNotExist, IndexError):
|
||||
role = None
|
||||
|
||||
is_template_owner_or_admin = role in [RoleChoices.OWNER, RoleChoices.ADMIN]
|
||||
|
||||
if self.role == RoleChoices.OWNER:
|
||||
can_delete = (
|
||||
user.id == self.user_id
|
||||
and self.template.accesses.filter(role=RoleChoices.OWNER).count() > 1
|
||||
)
|
||||
set_role_to = [RoleChoices.ADMIN, RoleChoices.MEMBER] if can_delete else []
|
||||
else:
|
||||
can_delete = is_template_owner_or_admin
|
||||
set_role_to = []
|
||||
if role == RoleChoices.OWNER:
|
||||
set_role_to.append(RoleChoices.OWNER)
|
||||
if is_template_owner_or_admin:
|
||||
set_role_to.extend([RoleChoices.ADMIN, RoleChoices.MEMBER])
|
||||
|
||||
# Remove the current role as we don't want to propose it as an option
|
||||
try:
|
||||
set_role_to.remove(self.role)
|
||||
except ValueError:
|
||||
pass
|
||||
|
||||
return {
|
||||
"delete": can_delete,
|
||||
"get": bool(role),
|
||||
"patch": bool(set_role_to),
|
||||
"put": bool(set_role_to),
|
||||
"set_role_to": set_role_to,
|
||||
}
|
||||
|
||||
|
||||
def oidc_user_getter(validated_token):
|
||||
"""
|
||||
Given a valid OIDC token , retrieve, create or update corresponding user/contact/email from db.
|
||||
|
||||
The token is expected to have the following fields in payload:
|
||||
- sub
|
||||
- email
|
||||
- ...
|
||||
"""
|
||||
try:
|
||||
user_id = validated_token[api_settings.USER_ID_CLAIM]
|
||||
except KeyError as exc:
|
||||
raise InvalidToken(
|
||||
_("Token contained no recognizable user identification")
|
||||
) from exc
|
||||
|
||||
try:
|
||||
user = User.objects.get(identities__sub=user_id)
|
||||
except User.DoesNotExist:
|
||||
user = User.objects.create()
|
||||
Identities.objects.create(user=user, sub=user_id, email=validated_token["email"])
|
||||
|
||||
return user
|
||||
Reference in New Issue
Block a user