518 lines
16 KiB
Python
518 lines
16 KiB
Python
from typing import Dict, Optional
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from django.db import transaction
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from ..core.config import config
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from ..poll.serializers import default_votes_validator
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from ..utils.auth import get_group_model
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from ..utils.autoupdate import inform_changed_data
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from ..utils.rest_api import (
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CharField,
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DecimalField,
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DictField,
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Field,
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IdPrimaryKeyRelatedField,
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IntegerField,
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ModelSerializer,
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SerializerMethodField,
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ValidationError,
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)
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from ..utils.validate import validate_html
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from .models import (
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Category,
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Motion,
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MotionBlock,
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MotionChangeRecommendation,
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MotionComment,
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MotionCommentSection,
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MotionPoll,
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State,
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StatuteParagraph,
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Submitter,
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Workflow,
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)
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def validate_workflow_field(value):
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"""
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Validator to ensure that the workflow with the given id exists.
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"""
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if not Workflow.objects.filter(pk=value).exists():
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raise ValidationError({"detail": f"Workflow {value} does not exist."})
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class StatuteParagraphSerializer(ModelSerializer):
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"""
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Serializer for motion.models.StatuteParagraph objects.
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"""
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class Meta:
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model = StatuteParagraph
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fields = ("id", "title", "text", "weight")
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class CategorySerializer(ModelSerializer):
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"""
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Serializer for motion.models.Category objects.
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"""
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class Meta:
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model = Category
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fields = ("id", "name", "prefix")
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class MotionBlockSerializer(ModelSerializer):
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"""
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Serializer for motion.models.Category objects.
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"""
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agenda_type = IntegerField(
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write_only=True, required=False, min_value=1, max_value=3, allow_null=True
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)
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agenda_parent_id = IntegerField(write_only=True, required=False, min_value=1)
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class Meta:
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model = MotionBlock
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fields = ("id", "title", "agenda_item_id", "agenda_type", "agenda_parent_id")
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def create(self, validated_data):
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"""
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Customized create method. Set information about related agenda item
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into agenda_item_update_information container.
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"""
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agenda_type = validated_data.pop("agenda_type", None)
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agenda_parent_id = validated_data.pop("agenda_parent_id", None)
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motion_block = MotionBlock(**validated_data)
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motion_block.agenda_item_update_information["type"] = agenda_type
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motion_block.agenda_item_update_information["parent_id"] = agenda_parent_id
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motion_block.save()
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return motion_block
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class StateSerializer(ModelSerializer):
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"""
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Serializer for motion.models.State objects.
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"""
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class Meta:
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model = State
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fields = (
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"id",
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"name",
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"recommendation_label",
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"css_class",
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"access_level",
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"allow_support",
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"allow_create_poll",
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"allow_submitter_edit",
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"dont_set_identifier",
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"show_state_extension_field",
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"merge_amendment_into_final",
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"show_recommendation_extension_field",
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"next_states",
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"workflow",
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)
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class WorkflowSerializer(ModelSerializer):
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"""
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Serializer for motion.models.Workflow objects.
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"""
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states = StateSerializer(many=True, read_only=True)
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class Meta:
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model = Workflow
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fields = ("id", "name", "states", "first_state")
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read_only_fields = ("first_state",)
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@transaction.atomic
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def create(self, validated_data):
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"""
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Customized create method. Creating a new workflow does always create a
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new state which is used as first state.
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"""
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workflow = super().create(validated_data)
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first_state = State.objects.create(
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name="new",
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workflow=workflow,
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allow_create_poll=True,
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allow_support=True,
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allow_submitter_edit=True,
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)
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workflow.first_state = first_state
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workflow.save()
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return workflow
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class AmendmentParagraphsJSONSerializerField(Field):
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"""
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Serializer for motions's amendment_paragraphs JSONField.
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"""
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def to_representation(self, obj):
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"""
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Returns the value of the field.
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"""
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return obj
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def to_internal_value(self, data):
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"""
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Checks that data is a list of strings.
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"""
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if not isinstance(data, list):
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raise ValidationError({"detail": "Data must be a list."})
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for paragraph in data:
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if not isinstance(paragraph, str) and paragraph is not None:
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raise ValidationError(
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{"detail": "Paragraph must be either a string or null/None."}
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)
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return data
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class MotionPollSerializer(ModelSerializer):
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"""
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Serializer for motion.models.MotionPoll objects.
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"""
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yes = SerializerMethodField()
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no = SerializerMethodField()
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abstain = SerializerMethodField()
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votes = DictField(
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child=DecimalField(
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max_digits=15, decimal_places=6, min_value=-2, allow_null=True
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),
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write_only=True,
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)
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has_votes = SerializerMethodField()
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class Meta:
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model = MotionPoll
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fields = (
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"id",
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"motion",
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"yes",
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"no",
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"abstain",
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"votesvalid",
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"votesinvalid",
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"votescast",
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"votes",
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"has_votes",
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)
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validators = (default_votes_validator,)
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def __init__(self, *args, **kwargs):
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# The following dictionary is just a cache for several votes.
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self._votes_dicts: Dict[int, Dict[int, int]] = {}
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super().__init__(*args, **kwargs)
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def get_yes(self, obj):
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try:
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result: Optional[str] = str(self.get_votes_dict(obj)["Yes"])
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except KeyError:
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result = None
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return result
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def get_no(self, obj):
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try:
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result: Optional[str] = str(self.get_votes_dict(obj)["No"])
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except KeyError:
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result = None
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return result
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def get_abstain(self, obj):
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try:
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result: Optional[str] = str(self.get_votes_dict(obj)["Abstain"])
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except KeyError:
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result = None
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return result
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def get_votes_dict(self, obj):
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try:
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votes_dict = self._votes_dicts[obj.pk]
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except KeyError:
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votes_dict = self._votes_dicts[obj.pk] = {}
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for vote in obj.get_votes():
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votes_dict[vote.value] = vote.weight
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return votes_dict
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def get_has_votes(self, obj):
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"""
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Returns True if this poll has some votes.
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"""
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return obj.has_votes()
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@transaction.atomic
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def update(self, instance, validated_data):
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"""
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Customized update method for polls. To update votes use the write
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only field 'votes'.
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Example data:
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"votes": {"Yes": 10, "No": 4, "Abstain": -2}
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"""
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# Update votes.
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votes = validated_data.get("votes")
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if votes:
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if len(votes) != len(instance.get_vote_values()):
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raise ValidationError(
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{
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"detail": f"You have to submit data for {len(instance.get_vote_values())} vote values."
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}
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)
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for vote_value in votes.keys():
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if vote_value not in instance.get_vote_values():
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raise ValidationError(
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{"detail": f"Vote value {vote_value} is invalid."}
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)
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instance.set_vote_objects_with_values(
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instance.get_options().get(), votes, skip_autoupdate=True
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)
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# Update remaining writeable fields.
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instance.votesvalid = validated_data.get("votesvalid", instance.votesvalid)
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instance.votesinvalid = validated_data.get(
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"votesinvalid", instance.votesinvalid
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)
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instance.votescast = validated_data.get("votescast", instance.votescast)
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instance.save()
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return instance
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class MotionChangeRecommendationSerializer(ModelSerializer):
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"""
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Serializer for motion.models.MotionChangeRecommendation objects.
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"""
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class Meta:
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model = MotionChangeRecommendation
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fields = (
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"id",
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"motion",
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"rejected",
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"internal",
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"type",
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"other_description",
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"line_from",
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"line_to",
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"text",
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"creation_time",
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)
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def is_title_cr(self, data):
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return int(data["line_from"]) == 0 and int(data["line_to"]) == 0
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def validate(self, data):
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# Change recommendations for titles are stored as plain-text, thus they don't need to be html-escaped
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if "text" in data and not self.is_title_cr(data):
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data["text"] = validate_html(data["text"])
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return data
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class MotionCommentSectionSerializer(ModelSerializer):
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"""
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Serializer for motion.models.MotionCommentSection objects.
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"""
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read_groups = IdPrimaryKeyRelatedField(
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many=True, required=False, queryset=get_group_model().objects.all()
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)
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write_groups = IdPrimaryKeyRelatedField(
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many=True, required=False, queryset=get_group_model().objects.all()
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)
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class Meta:
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model = MotionCommentSection
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fields = ("id", "name", "read_groups", "write_groups")
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def create(self, validated_data):
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""" Call inform_changed_data on creation, so the cache includes the groups. """
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section = super().create(validated_data)
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inform_changed_data(section)
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return section
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class MotionCommentSerializer(ModelSerializer):
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"""
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Serializer for motion.models.MotionComment objects.
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"""
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read_groups_id = SerializerMethodField()
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class Meta:
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model = MotionComment
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fields = ("id", "comment", "section", "read_groups_id")
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def get_read_groups_id(self, comment):
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return [group.id for group in comment.section.read_groups.all()]
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class SubmitterSerializer(ModelSerializer):
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"""
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Serializer for motion.models.Submitter objects.
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"""
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class Meta:
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model = Submitter
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fields = ("id", "user", "motion", "weight")
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class MotionSerializer(ModelSerializer):
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"""
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Serializer for motion.models.Motion objects.
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"""
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comments = MotionCommentSerializer(many=True, read_only=True)
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polls = MotionPollSerializer(many=True, read_only=True)
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modified_final_version = CharField(allow_blank=True, required=False)
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reason = CharField(allow_blank=True, required=False)
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state_access_level = SerializerMethodField()
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text = CharField(allow_blank=True)
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title = CharField(max_length=255)
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amendment_paragraphs = AmendmentParagraphsJSONSerializerField(required=False)
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workflow_id = IntegerField(
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min_value=1, required=False, validators=[validate_workflow_field]
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)
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agenda_type = IntegerField(
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write_only=True, required=False, min_value=1, max_value=3, allow_null=True
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)
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agenda_parent_id = IntegerField(write_only=True, required=False, min_value=1)
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submitters = SubmitterSerializer(many=True, read_only=True)
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change_recommendations = MotionChangeRecommendationSerializer(
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many=True, read_only=True
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)
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class Meta:
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model = Motion
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fields = (
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"id",
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"identifier",
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"title",
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"text",
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"amendment_paragraphs",
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"modified_final_version",
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"reason",
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"parent",
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"category",
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"comments",
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"motion_block",
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"origin",
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"submitters",
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"supporters",
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"state",
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"state_extension",
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"state_access_level",
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"statute_paragraph",
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"workflow_id",
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"recommendation",
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"recommendation_extension",
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"tags",
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"attachments",
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"polls",
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"agenda_item_id",
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"agenda_type",
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"agenda_parent_id",
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"sort_parent",
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"weight",
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"created",
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"last_modified",
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"change_recommendations",
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)
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read_only_fields = (
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"state",
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"recommendation",
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) # Some other fields are also read_only. See definitions above.
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def validate(self, data):
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if "text" in data:
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data["text"] = validate_html(data["text"])
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if "modified_final_version" in data:
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data["modified_final_version"] = validate_html(
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data["modified_final_version"]
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)
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if "reason" in data:
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data["reason"] = validate_html(data["reason"])
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if "amendment_paragraphs" in data:
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data["amendment_paragraphs"] = list(
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map(
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lambda entry: validate_html(entry)
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if isinstance(entry, str)
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else None,
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data["amendment_paragraphs"],
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)
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)
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data["text"] = ""
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else:
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if "text" in data and not data["text"]:
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raise ValidationError({"detail": "The text field may not be blank."})
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if config["motions_reason_required"]:
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if (self.partial and "reason" in data and not data["reason"]) or (
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not self.partial and not data.get("reason")
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):
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raise ValidationError({"detail": "The reason field may not be blank."})
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return data
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@transaction.atomic
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def create(self, validated_data):
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"""
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Customized method to create a new motion from some data.
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Set also information about related agenda item into
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agenda_item_update_information container.
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"""
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motion = Motion()
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motion.title = validated_data["title"]
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motion.text = validated_data["text"]
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motion.amendment_paragraphs = validated_data.get("amendment_paragraphs")
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motion.modified_final_version = validated_data.get("modified_final_version", "")
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motion.reason = validated_data.get("reason", "")
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motion.identifier = validated_data.get("identifier")
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motion.category = validated_data.get("category")
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motion.motion_block = validated_data.get("motion_block")
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motion.origin = validated_data.get("origin", "")
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motion.parent = validated_data.get("parent")
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motion.statute_paragraph = validated_data.get("statute_paragraph")
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motion.reset_state(validated_data.get("workflow_id"))
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motion.agenda_item_update_information["type"] = validated_data.get(
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"agenda_type"
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)
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motion.agenda_item_update_information["parent_id"] = validated_data.get(
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"agenda_parent_id"
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)
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motion.save()
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motion.supporters.add(*validated_data.get("supporters", []))
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motion.attachments.add(*validated_data.get("attachments", []))
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motion.tags.add(*validated_data.get("tags", []))
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return motion
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@transaction.atomic
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def update(self, motion, validated_data):
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"""
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Customized method to update a motion.
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"""
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workflow_id = None
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if "workflow_id" in validated_data:
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workflow_id = validated_data.pop("workflow_id")
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result = super().update(motion, validated_data)
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if workflow_id is not None and workflow_id != motion.workflow_id:
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motion.reset_state(workflow_id)
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motion.save()
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return result
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def get_state_access_level(self, motion):
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"""
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Returns the access level of this state. The default is 0 so everybody
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with permission to see motions can see this motion.
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"""
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return motion.state.access_level
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