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from sqlalchemy import create_engine, Table, Column, String, Integer, DateTime, ForeignKey
from sqlalchemy.orm import relationship
from sqlalchemy.ext.hybrid import hybrid_property
from sqlalchemy_utc import UtcDateTime, utcnow
import sqlalchemy.sql.functions as func
from wtforms_alchemy import ModelForm
from app.sql.common import Base, Session
from app.sql.columns.hash_column import HashColumn
from app.sql.columns.media_type_column import MediaTypeColumn
from app.models.types import MediaTypeIndex, MediaTypeName
from app.utils.file_utils import sha256_tree
from app.settings import app_cfg
from os.path import join
class Media(Base):
"""Table for storing references to various media"""
__tablename__ = 'media'
id = Column(Integer, primary_key=True)
import_id = Column(Integer, ForeignKey('media_import.id'), nullable=True)
mediaType = Column(MediaTypeColumn(), nullable=False)
sha256 = Column(HashColumn(32), nullable=False)
ext = Column(String(4, convert_unicode=True), nullable=False)
frame = Column(Integer, nullable=True)
created_at = Column(UtcDateTime(), default=utcnow())
# children = relationship("Media")
# media_features = relationship("MediaFeature")
# media_metadata = relationship("MediaMetadata")
def toJSON(self):
return {
'id': self.id,
'import_id': self.import_id,
'mediaType': self.mediaType,
'sha256': self.sha256,
'frame': self.frame,
'ext': self.ext,
'url': self.url(),
'created_at': self.created_at,
}
def toFullJSON(self, session):
siblings = session.query(Media).filter(Media.sha256 == self.sha256).all()
return {
'el': self.toJSON(),
'siblings': [ el.toJSON() for el in siblings ],
}
def filename(self):
if self.mediaType == 'video_frame':
return "{}_{:03d}{}".format(self.sha256, self.frame, self.ext)
return "{}{}".format(self.sha256, self.ext)
def filetree(self):
return sha256_tree(self.sha256)
def filepath(self):
return join(app_cfg.DIR_MEDIA, self.filetree())
def fullpath(self):
return join(self.filepath(), self.filename())
def archivepath(self):
return join('media', self.filename())
def url(self):
return join(app_cfg.URL_MEDIA, self.filetree(), self.filename())
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