openmedialibrary/oml/annotation/models.py

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2019-02-09 15:25:23 +00:00
# -*- coding: utf-8 -*-
from datetime import datetime
import json
import logging
import os
import shutil
from sqlalchemy.orm import load_only
import ox
import sqlalchemy as sa
from changelog import add_record
from db import MutableDict
import db
import json_pickler
import settings
import state
import utils
import media
from websocket import trigger_event
logger = logging.getLogger(__name__)
class Annotation(db.Model):
__tablename__ = 'annotation'
_id = sa.Column(sa.Integer(), primary_key=True)
id = sa.Column(sa.String(43))
created = sa.Column(sa.DateTime())
modified = sa.Column(sa.DateTime())
user = sa.orm.relationship('User', backref=sa.orm.backref('annotations', lazy='dynamic'))
item = sa.orm.relationship('Item', backref=sa.orm.backref('items', lazy='dynamic'))
data = sa.Column(MutableDict.as_mutable(sa.PickleType(pickler=json_pickler)))
def __init__(self, item_id, user_id, data):
self.created = datetime.utcnow()
self.modified = datetime.utcnow()
self.item_id = item_id
self.user_id = user_id
self.data = data
@classmethod
def create(cls, **kwargs):
a = cls(**kwargs)
state.db.session.add(a)
state.db.session.commit()
@classmethod
def get(cls, user, item_id, annotation_id):
for a in cls.query.filter_by(item_id=item_id, user=user, _id=annotation_id):
if a.data.get('id') == annotation_id:
return a
@classmethod
def get_by_item(cls, user, item_id):
annotations = []
for a in cls.query.filter_by(item_id=item_id):
annotations.append(a.json())
return annotations
def save(self):
_id = self.data.get('id')
if _id:
self._id = _id
state.db.session.add(self)
state.db.session.commit()
def json(self):
data = self.data.copy()
data['created'] = self.created
data['modified'] = self.modified
data['user'] = self.user_id
data['_id'] = ox.toAZ(self.id)
return data