202 lines
6 KiB
Python
202 lines
6 KiB
Python
import datetime
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import uuid
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from collections import deque
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from enum import Enum
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from typing import Dict, List, Set, Union
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import marshmallow as ma
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import teal.cache
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from flask import Response, jsonify, request
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from marshmallow import Schema as MarshmallowSchema, fields as f
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from teal.marshmallow import EnumField
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from teal.resource import View
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from ereuse_devicehub.db import db
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from ereuse_devicehub.query import things_response
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from ereuse_devicehub.resources.device.models import Device
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from ereuse_devicehub.resources.lot.models import Lot, Path
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class LotFormat(Enum):
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UiTree = 'UiTree'
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class LotView(View):
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class FindArgs(MarshmallowSchema):
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"""
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Allowed arguments for the ``find``
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method (GET collection) endpoint
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"""
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format = EnumField(LotFormat, missing=None)
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search = f.Str(missing=None)
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def post(self):
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l = request.get_json()
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lot = Lot(**l)
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db.session.add(lot)
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db.session().final_flush()
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ret = self.schema.jsonify(lot)
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ret.status_code = 201
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db.session.commit()
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return ret
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def patch(self, id):
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patch_schema = self.resource_def.SCHEMA(only=('name', 'description'), partial=True)
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l = request.get_json(schema=patch_schema)
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lot = Lot.query.filter_by(id=id).one()
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for key, value in l.items():
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setattr(lot, key, value)
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db.session.commit()
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return Response(status=204)
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def one(self, id: uuid.UUID):
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"""Gets one action."""
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lot = Lot.query.filter_by(id=id).one() # type: Lot
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return self.schema.jsonify(lot)
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@teal.cache.cache(datetime.timedelta(minutes=5))
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def find(self, args: dict):
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"""
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Gets lots.
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By passing the value `UiTree` in the parameter `format`
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of the query you get a recursive nested suited for ui-tree::
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[
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{title: 'lot1',
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nodes: [{title: 'child1', nodes:[]}]
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]
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Note that in this format filters are ignored.
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Otherwise it just returns the standard flat view of lots that
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you can filter.
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"""
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if args['format'] == LotFormat.UiTree:
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lots = self.schema.dump(Lot.query, many=True, nested=1)
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ret = {
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'items': {l['id']: l for l in lots},
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'tree': self.ui_tree(),
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'url': request.path
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}
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else:
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query = Lot.query
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if args['search']:
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query = query.filter(Lot.name.ilike(args['search'] + '%'))
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lots = query.paginate(per_page=6 if args['search'] else 30)
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return things_response(
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self.schema.dump(lots.items, many=True, nested=0),
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lots.page, lots.per_page, lots.total, lots.prev_num, lots.next_num
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)
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return jsonify(ret)
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def delete(self, id):
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lot = Lot.query.filter_by(id=id).one()
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lot.delete()
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db.session.commit()
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return Response(status=204)
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@classmethod
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def ui_tree(cls) -> List[Dict]:
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tree = []
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for model in Path.query: # type: Path
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path = deque(model.path.path.split('.'))
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cls._p(tree, path)
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return tree
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@classmethod
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def _p(cls, nodes: List[Dict[str, Union[uuid.UUID, List]]], path: deque):
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"""Recursively creates the nested lot structure.
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Every recursive step consumes path (a deque of lot_id),
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trying to find it as the value of id in nodes, otherwise
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it adds itself. Then moves to the node's children.
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"""
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lot_id = uuid.UUID(path.popleft().replace('_', '-'))
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try:
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# does lot_id exist already in node?
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node = next(part for part in nodes if lot_id == part['id'])
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except StopIteration:
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node = {
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'id': lot_id,
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'nodes': []
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}
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nodes.append(node)
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if path:
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cls._p(node['nodes'], path)
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class LotBaseChildrenView(View):
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"""Base class for adding / removing children devices and
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lots from a lot.
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"""
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def __init__(self, definition: 'Resource', **kw) -> None:
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super().__init__(definition, **kw)
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self.list_args = self.ListArgs()
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def get_ids(self) -> Set[uuid.UUID]:
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args = self.QUERY_PARSER.parse(self.list_args, request, locations=('querystring',))
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return set(args['id'])
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def get_lot(self, id: uuid.UUID) -> Lot:
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return Lot.query.filter_by(id=id).one()
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# noinspection PyMethodOverriding
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def post(self, id: uuid.UUID):
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lot = self.get_lot(id)
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self._post(lot, self.get_ids())
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db.session().final_flush()
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ret = self.schema.jsonify(lot)
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ret.status_code = 201
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db.session.commit()
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return ret
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def delete(self, id: uuid.UUID):
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lot = self.get_lot(id)
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self._delete(lot, self.get_ids())
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db.session().final_flush()
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response = self.schema.jsonify(lot)
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db.session.commit()
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return response
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def _post(self, lot: Lot, ids: Set[uuid.UUID]):
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raise NotImplementedError
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def _delete(self, lot: Lot, ids: Set[uuid.UUID]):
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raise NotImplementedError
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class LotChildrenView(LotBaseChildrenView):
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"""View for adding and removing child lots from a lot.
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Ex. ``lot/<id>/children/id=X&id=Y``.
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"""
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class ListArgs(ma.Schema):
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id = ma.fields.List(ma.fields.UUID())
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def _post(self, lot: Lot, ids: Set[uuid.UUID]):
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lot.add_children(*ids)
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def _delete(self, lot: Lot, ids: Set[uuid.UUID]):
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lot.remove_children(*ids)
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class LotDeviceView(LotBaseChildrenView):
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"""View for adding and removing child devices from a lot.
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Ex. ``lot/<id>/devices/id=X&id=Y``.
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"""
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class ListArgs(ma.Schema):
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id = ma.fields.List(ma.fields.Integer())
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def _post(self, lot: Lot, ids: Set[int]):
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lot.devices.update(Device.query.filter(Device.id.in_(ids)))
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def _delete(self, lot: Lot, ids: Set[int]):
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lot.devices.difference_update(Device.query.filter(Device.id.in_(ids)))
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