from django.db import models

import os

import time

def image_file_name(instance, filename):

    now = time.time()

    milliseconds = '%03d' % int((now - int(now)) * 1000)

    localtime = time.localtime()

    _, ext = os.path.splitext(filename)

    filename = time.strftime('%Y%m%d%H%M%S', localtime) + milliseconds

    return 'metadatacomposer/images/' + filename + ext

class Image(models.Model):

    image_file = models.ImageField(width_field="width", height_field="height", upload_to=image_file_name, max_length=2048)

    width = models.IntegerField(null=False, blank=False)

    height = models.IntegerField(null=False, blank=False)

    title = models.CharField(null=True, blank=True, max_length=1024)

    description = models.TextField(null=True, blank=True)

    creation_date = models.DateTimeField(auto_now_add=True)

    modification_date = models.DateTimeField(auto_now=True)