OpenSlides/openslides/core/serializers.py

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Python
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from typing import Any
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from .models import (
ChatMessage,
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ConfigStore,
Countdown,
History,
ProjectionDefault,
Projector,
ProjectorMessage,
Tag,
)
from ..utils.projector import projector_slides
from ..utils.rest_api import Field, IntegerField, ModelSerializer, ValidationError
from ..utils.validate import validate_html
class JSONSerializerField(Field):
"""
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Serializer for projector's and config JSONField.
"""
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def to_internal_value(self, data):
"""
Returns the value. It is encoded from the Django JSONField.
"""
return data
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def to_representation(self, value):
"""
Returns the value. It is decoded from the Django JSONField.
"""
return value
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class ProjectionDefaultSerializer(ModelSerializer):
"""
Serializer for core.models.ProjectionDefault objects.
"""
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class Meta:
model = ProjectionDefault
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fields = ("id", "name", "display_name", "projector")
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def elements_validator(value: Any) -> None:
"""
Checks the format of the elements field.
"""
if not isinstance(value, list):
raise ValidationError({"detail": "Data must be a list."})
for element in value:
if not isinstance(element, dict):
raise ValidationError({"detail": "Data must be a dictionary."})
if element.get("name") is None:
raise ValidationError(
{"detail": "Every dictionary must have a key 'name'."}
)
if element["name"] not in projector_slides:
raise ValidationError(
{"detail": f"Unknown projector element {element['name']},"}
)
def elements_array_validator(value: Any) -> None:
"""
Validates the value of the element field of the projector model.
"""
if not isinstance(value, list):
raise ValidationError({"detail": "Data must be a list."})
for element in value:
elements_validator(element)
class ProjectorSerializer(ModelSerializer):
"""
Serializer for core.models.Projector objects.
"""
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elements = JSONSerializerField(validators=[elements_validator])
elements_preview = JSONSerializerField(validators=[elements_validator])
elements_history = JSONSerializerField(validators=[elements_array_validator])
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projectiondefaults = ProjectionDefaultSerializer(many=True, read_only=True)
width = IntegerField(min_value=800, max_value=3840, required=False)
height = IntegerField(min_value=340, max_value=2880, required=False)
class Meta:
model = Projector
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fields = (
"id",
"elements",
"elements_preview",
"elements_history",
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"scale",
"scroll",
"name",
"width",
"height",
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"reference_projector",
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"projectiondefaults",
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"background_color",
"header_background_color",
"header_font_color",
"header_h1_color",
"show_header_footer",
"show_title",
"show_logo",
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)
read_only_fields = ("scale", "scroll")
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class TagSerializer(ModelSerializer):
"""
Serializer for core.models.Tag objects.
"""
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class Meta:
model = Tag
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fields = ("id", "name")
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class ConfigSerializer(ModelSerializer):
"""
Serializer for core.models.Tag objects.
"""
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value = JSONSerializerField()
class Meta:
model = ConfigStore
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fields = ("id", "key", "value")
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class ChatMessageSerializer(ModelSerializer):
"""
Serializer for core.models.ChatMessage objects.
"""
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class Meta:
model = ChatMessage
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fields = ("id", "message", "timestamp", "user")
read_only_fields = ("user",)
class ProjectorMessageSerializer(ModelSerializer):
"""
Serializer for core.models.ProjectorMessage objects.
"""
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class Meta:
model = ProjectorMessage
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fields = ("id", "message")
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def validate(self, data):
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if "message" in data:
data["message"] = validate_html(data["message"])
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return data
class CountdownSerializer(ModelSerializer):
"""
Serializer for core.models.Countdown objects.
"""
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class Meta:
model = Countdown
fields = (
"id",
"title",
"description",
"default_time",
"countdown_time",
"running",
)
unique_together = ("title",)
class HistorySerializer(ModelSerializer):
"""
Serializer for core.models.Countdown objects.
Does not contain full data of history object.
"""
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information = JSONSerializerField()
class Meta:
model = History
fields = ("id", "element_id", "now", "information", "restricted", "user")
read_only_fields = ("now",)