import os from datetime import datetime, timedelta from PIL import Image import requests from shortuuidfield import ShortUUIDField import logging from django.conf import settings from django.core.cache import cache from django.core.validators import MaxValueValidator, MinValueValidator from django.core.exceptions import ValidationError from django.dispatch import receiver from django.db import models from django.db.models.signals import post_save from django.urls import reverse from django.utils.html import format_html from django.utils.timezone import now from network.users.models import User from network.base.helpers import get_apikey from network.base.managers import ObservationManager ANTENNA_BANDS = ['HF', 'VHF', 'UHF', 'L', 'S', 'C', 'X', 'KU'] ANTENNA_TYPES = ( ('dipole', 'Dipole'), ('v-dipole', 'V-Dipole'), ('discone', 'Discone'), ('ground', 'Ground Plane'), ('yagi', 'Yagi'), ('cross-yagi', 'Cross Yagi'), ('helical', 'Helical'), ('parabolic', 'Parabolic'), ('vertical', 'Verical'), ('turnstile', 'Turnstile'), ('quadrafilar', 'Quadrafilar'), ('eggbeater', 'Eggbeater'), ('lindenblad', 'Lindenblad'), ('paralindy', 'Parasitic Lindenblad') ) OBSERVATION_STATUSES = ( ('unknown', 'Unknown'), ('good', 'Good'), ('bad', 'Bad'), ('failed', 'Failed'), ) STATION_STATUSES = ( (2, 'Online'), (1, 'Testing'), (0, 'Offline'), ) SATELLITE_STATUS = ['alive', 'dead', 're-entered'] TRANSMITTER_TYPE = ['Transmitter', 'Transceiver', 'Transponder'] def _name_obs_files(instance, filename): return 'data_obs/{0}/{1}'.format(instance.id, filename) def _name_obs_demoddata(instance, filename): return 'data_obs/{0}/{1}'.format(instance.observation.id, filename) def _observation_post_save(sender, instance, created, **kwargs): """ Post save Observation operations * Auto vet as good obserfvation with Demod Data * Mark Observations from testing stations * Update client version for ground station """ post_save.disconnect(_observation_post_save, sender=Observation) if created and instance.ground_station.testing: instance.testing = True instance.save() if instance.has_demoddata and instance.vetted_status == 'unknown': instance.vetted_status = 'good' instance.vetted_datetime = now() instance.save() post_save.connect(_observation_post_save, sender=Observation) def _station_post_save(sender, instance, created, **kwargs): """ Post save Station operations * Store current status """ post_save.disconnect(_station_post_save, sender=Station) if not created: current_status = instance.status if instance.is_offline: instance.status = 0 elif instance.testing: instance.status = 1 else: instance.status = 2 instance.save() if instance.status != current_status: StationStatusLog.objects.create(station=instance, status=instance.status) else: StationStatusLog.objects.create(station=instance, status=instance.status) post_save.connect(_station_post_save, sender=Station) def _tle_post_save(sender, instance, created, **kwargs): """ Post save Tle operations * Update TLE for future observations """ if created: start_time = now() + timedelta(minutes=10) Observation.objects.filter(satellite=instance.satellite, start__gt=start_time) \ .update(tle=instance.id) def validate_image(fieldfile_obj): filesize = fieldfile_obj.file.size megabyte_limit = 2.0 if filesize > megabyte_limit * 1024 * 1024: raise ValidationError("Max file size is %sMB" % str(megabyte_limit)) class Mode(models.Model): """Model for Modes.""" name = models.CharField(max_length=10, unique=True) def __unicode__(self): return self.name class Antenna(models.Model): """Model for antennas tracked with SatNOGS.""" frequency = models.PositiveIntegerField() frequency_max = models.PositiveIntegerField() band = models.CharField(choices=zip(ANTENNA_BANDS, ANTENNA_BANDS), max_length=5) antenna_type = models.CharField(choices=ANTENNA_TYPES, max_length=15) def __unicode__(self): return '{0} - {1} - {2} - {3}'.format(self.band, self.antenna_type, self.frequency, self.frequency_max) class Station(models.Model): """Model for SatNOGS ground stations.""" owner = models.ForeignKey(User, related_name="ground_stations", on_delete=models.SET_NULL, null=True, blank=True) name = models.CharField(max_length=45) image = models.ImageField(upload_to='ground_stations', blank=True, validators=[validate_image]) alt = models.PositiveIntegerField(help_text='In meters above sea level') lat = models.FloatField(validators=[MaxValueValidator(90), MinValueValidator(-90)], help_text='eg. 38.01697') lng = models.FloatField(validators=[MaxValueValidator(180), MinValueValidator(-180)], help_text='eg. 23.7314') qthlocator = models.CharField(max_length=255, blank=True) location = models.CharField(max_length=255, blank=True) antenna = models.ManyToManyField(Antenna, blank=True, related_name="stations", help_text=('If you want to add a new Antenna contact ' 'SatNOGS Team')) featured_date = models.DateField(null=True, blank=True) created = models.DateTimeField(auto_now_add=True) testing = models.BooleanField(default=True) last_seen = models.DateTimeField(null=True, blank=True) status = models.IntegerField(choices=STATION_STATUSES, default=0) horizon = models.PositiveIntegerField(help_text='In degrees above 0', default=10) uuid = models.CharField(db_index=True, max_length=100, blank=True) description = models.TextField(max_length=500, blank=True, help_text='Max 500 characters') client_version = models.CharField(max_length=45, blank=True) class Meta: ordering = ['-status'] def get_image(self): if self.image and hasattr(self.image, 'url'): return self.image.url else: return settings.STATION_DEFAULT_IMAGE @property def is_online(self): try: heartbeat = self.last_seen + timedelta(minutes=int(settings.STATION_HEARTBEAT_TIME)) return heartbeat > now() except TypeError: return False @property def is_offline(self): return not self.is_online @property def is_testing(self): if self.is_online: if self.status == 1: return True return False def state(self): if not self.status: return format_html('Offline') if self.status == 1: return format_html('Testing') return format_html('Online') @property def success_rate(self): rate = cache.get('station-{0}-rate'.format(self.id)) if not rate: observations = self.observations.exclude(testing=True).exclude(vetted_status="unknown") success = observations.filter(id__in=(o.id for o in observations if o.is_good or o.is_bad)).count() if observations: rate = int(100 * (float(success) / float(observations.count()))) cache.set('station-{0}-rate'.format(self.id), rate) else: rate = False return rate @property def observations_count(self): count = self.observations.all().count() return count @property def observations_future_count(self): count = self.observations.is_future().count() return count @property def apikey(self): return get_apikey(user=self.owner) def __unicode__(self): return "%d - %s" % (self.pk, self.name) post_save.connect(_station_post_save, sender=Station) class StationStatusLog(models.Model): station = models.ForeignKey(Station, related_name='station_logs', on_delete=models.CASCADE, null=True, blank=True) status = models.IntegerField(choices=STATION_STATUSES, default=0) changed = models.DateTimeField(auto_now_add=True) class Meta: ordering = ['-changed'] def __unicode__(self): return '{0} - {1}'.format(self.station, self.status) class Satellite(models.Model): """Model for SatNOGS satellites.""" norad_cat_id = models.PositiveIntegerField() norad_follow_id = models.PositiveIntegerField(blank=True, null=True) name = models.CharField(max_length=45) names = models.TextField(blank=True) image = models.CharField(max_length=100, blank=True, null=True) manual_tle = models.BooleanField(default=False) status = models.CharField(choices=zip(SATELLITE_STATUS, SATELLITE_STATUS), max_length=10, default='alive') class Meta: ordering = ['norad_cat_id'] def get_image(self): if self.image: return self.image else: return settings.SATELLITE_DEFAULT_IMAGE @property def latest_tle(self): try: latest_tle = Tle.objects.filter(satellite=self).latest('updated') return latest_tle except Tle.DoesNotExist: return False @property def tle_no(self): try: line = self.latest_tle.tle1 return line[64:68] except AttributeError: return False @property def tle_epoch(self): try: line = self.latest_tle.tle1 except AttributeError: return False yd, s = line[18:32].split('.') epoch = (datetime.strptime(yd, "%y%j") + timedelta(seconds=float("." + s) * 24 * 60 * 60)) return epoch @property def data_count(self): return Observation.objects.filter(satellite=self).exclude(vetted_status='failed').count() @property def good_count(self): data = Observation.objects.filter(satellite=self) return data.filter(vetted_status='good').count() @property def bad_count(self): data = Observation.objects.filter(satellite=self) return data.filter(vetted_status='bad').count() @property def unvetted_count(self): data = Observation.objects.filter(satellite=self) return data.filter(vetted_status='unknown').count() @property def future_count(self): data = Observation.objects.filter(satellite=self) return data.filter(id__in=(o.id for o in data if o.is_future)).count() @property def success_rate(self): try: return int(100 * (float(self.good_count) / float(self.data_count))) except (ZeroDivisionError, TypeError): return 0 @property def bad_rate(self): try: return int(100 * (float(self.bad_count) / float(self.data_count))) except (ZeroDivisionError, TypeError): return 0 @property def unvetted_rate(self): try: return int(100 * (float(self.unvetted_count) / float(self.data_count))) except (ZeroDivisionError, TypeError): return 0 def __unicode__(self): return self.name class Tle(models.Model): tle0 = models.CharField(max_length=100, blank=True) tle1 = models.CharField(max_length=200, blank=True) tle2 = models.CharField(max_length=200, blank=True) updated = models.DateTimeField(auto_now=True, blank=True) satellite = models.ForeignKey(Satellite, related_name='tles', on_delete=models.CASCADE, null=True, blank=True) class Meta: ordering = ['tle0'] def __unicode__(self): uni_name = "%d - %s" % (self.id, self.tle0) return uni_name @property def str_array(self): # tle fields are unicode, pyephem and others expect python strings return [str(self.tle0), str(self.tle1), str(self.tle2)] post_save.connect(_tle_post_save, sender=Tle) class Transmitter(models.Model): """Model for antennas transponders.""" uuid = ShortUUIDField(db_index=True) description = models.TextField() alive = models.BooleanField(default=True) type = models.CharField(choices=zip(TRANSMITTER_TYPE, TRANSMITTER_TYPE), max_length=11, default='Transmitter') uplink_low = models.BigIntegerField(blank=True, null=True) uplink_high = models.BigIntegerField(blank=True, null=True) uplink_drift = models.IntegerField(blank=True, null=True) downlink_low = models.BigIntegerField(blank=True, null=True) downlink_high = models.BigIntegerField(blank=True, null=True) downlink_drift = models.IntegerField(blank=True, null=True) mode = models.ForeignKey(Mode, related_name='transmitters', blank=True, null=True, on_delete=models.SET_NULL) invert = models.BooleanField(default=False) baud = models.FloatField(validators=[MinValueValidator(0)], null=True, blank=True) satellite = models.ForeignKey(Satellite, related_name='transmitters', on_delete=models.CASCADE, null=True, blank=True) sync_to_db = models.BooleanField(default=False) @property def data_count(self): return Observation.objects.filter(transmitter=self).exclude(vetted_status='failed').count() @property def good_count(self): data = cache.get('tr-{0}-suc-count'.format(self.uuid)) if data is None: obs = Observation.objects.filter(transmitter=self) data = obs.filter(vetted_status='good').count() cache.set('tr-{0}-suc-count'.format(self.uuid), data, 3600) return data return data @property def bad_count(self): data = cache.get('tr-{0}-bad-count'.format(self.uuid)) if data is None: obs = Observation.objects.filter(transmitter=self) data = obs.filter(vetted_status='bad').count() cache.set('tr-{0}-bad-count'.format(self.uuid), data, 3600) return data return data @property def unvetted_count(self): data = cache.get('tr-{0}-unk-count'.format(self.uuid)) if data is None: obs = Observation.objects.filter(transmitter=self) data = obs.filter(vetted_status='unknown').count() cache.set('tr-{0}-unk-count'.format(self.uuid), data, 3600) return data return data @property def success_rate(self): rate = cache.get('tr-{0}-suc-rate'.format(self.uuid)) if rate is None: try: rate = int(100 * (float(self.good_count) / float(self.data_count))) cache.set('tr-{0}-suc-rate'.format(self.uuid), rate, 3600) return rate except (ZeroDivisionError, TypeError): cache.set('tr-{0}-suc-rate'.format(self.uuid), 0, 3600) return 0 return rate @property def bad_rate(self): rate = cache.get('tr-{0}-bad-rate'.format(self.uuid)) if rate is None: try: rate = int(100 * (float(self.bad_count) / float(self.data_count))) cache.set('tr-{0}-bad-rate'.format(self.uuid), rate, 3600) return rate except (ZeroDivisionError, TypeError): cache.set('tr-{0}-bad-rate'.format(self.uuid), 0, 3600) return 0 return rate @property def unvetted_rate(self): rate = cache.get('tr-{0}-unk-rate'.format(self.uuid)) if rate is None: try: rate = int(100 * (float(self.unvetted_count) / float(self.data_count))) cache.set('tr-{0}-unk-rate'.format(self.uuid), rate, 3600) return rate except (ZeroDivisionError, TypeError): cache.set('tr-{0}-unk-rate'.format(self.uuid), 0, 3600) return 0 return rate def __unicode__(self): return self.description class Observation(models.Model): """Model for SatNOGS observations.""" satellite = models.ForeignKey(Satellite, related_name='observations', on_delete=models.SET_NULL, null=True, blank=True) transmitter = models.ForeignKey(Transmitter, related_name='observations', on_delete=models.SET_NULL, null=True, blank=True) tle = models.ForeignKey(Tle, related_name='observations', on_delete=models.SET_NULL, null=True, blank=True) author = models.ForeignKey(User, related_name='observations', on_delete=models.SET_NULL, null=True, blank=True) start = models.DateTimeField() end = models.DateTimeField() ground_station = models.ForeignKey(Station, related_name='observations', on_delete=models.SET_NULL, null=True, blank=True) client_version = models.CharField(max_length=255, blank=True) client_metadata = models.TextField(blank=True) payload = models.FileField(upload_to=_name_obs_files, blank=True, null=True) waterfall = models.ImageField(upload_to=_name_obs_files, blank=True, null=True) vetted_datetime = models.DateTimeField(null=True, blank=True) vetted_user = models.ForeignKey(User, related_name='observations_vetted', on_delete=models.SET_NULL, null=True, blank=True) vetted_status = models.CharField(choices=OBSERVATION_STATUSES, max_length=20, default='unknown') testing = models.BooleanField(default=False) rise_azimuth = models.FloatField(blank=True, null=True) max_altitude = models.FloatField(blank=True, null=True) set_azimuth = models.FloatField(blank=True, null=True) archived = models.BooleanField(default=False) archive_identifier = models.CharField(max_length=255, blank=True) archive_url = models.URLField(blank=True, null=True) objects = ObservationManager.as_manager() @property def is_past(self): return self.end < now() @property def is_future(self): return self.end > now() # this payload has been vetted good/bad/failed by someone @property def is_vetted(self): return not self.vetted_status == 'unknown' # this payload has been vetted as good by someone @property def is_good(self): return self.vetted_status == 'good' # this payload has been vetted as bad by someone @property def is_bad(self): return self.vetted_status == 'bad' # this payload has been vetted as failed by someone @property def is_failed(self): return self.vetted_status == 'failed' @property def has_waterfall(self): """Run some checks on the waterfall for existence of data.""" if self.waterfall is None: return False if not os.path.isfile(os.path.join(settings.MEDIA_ROOT, self.waterfall.name)): return False if self.waterfall.size == 0: return False return True @property def has_audio(self): """Run some checks on the payload for existence of data.""" if self.archive_url: return True if self.payload is None: return False if not os.path.isfile(os.path.join(settings.MEDIA_ROOT, self.payload.name)): return False if self.payload.size == 0: return False return True @property def has_demoddata(self): """Check if the observation has Demod Data.""" if self.demoddata.count(): return True return False @property def audio_url(self): if self.has_audio: if self.archive_url: r = requests.get(self.archive_url, allow_redirects=False) try: url = r.headers['Location'] return url except Exception: logger = logging.getLogger(__name__) logger.warning("Request to '%s' returned status code: %s", r.url, r.status_code) return '' else: return self.payload.url return '' class Meta: ordering = ['-start', '-end'] def __unicode__(self): return str(self.id) def get_absolute_url(self): return reverse('base:observation_view', kwargs={'id': self.id}) @receiver(models.signals.post_delete, sender=Observation) def observation_remove_files(sender, instance, **kwargs): if instance.payload: if os.path.isfile(instance.payload.path): os.remove(instance.payload.path) if instance.waterfall: if os.path.isfile(instance.waterfall.path): os.remove(instance.waterfall.path) post_save.connect(_observation_post_save, sender=Observation) class DemodData(models.Model): observation = models.ForeignKey(Observation, related_name='demoddata', on_delete=models.CASCADE, blank=True, null=True) payload_demod = models.FileField(upload_to=_name_obs_demoddata, blank=True, null=True) copied_to_db = models.BooleanField(default=False) def is_image(self): with open(self.payload_demod.path) as fp: try: Image.open(fp) except (IOError, TypeError): return False else: return True def display_payload(self): with open(self.payload_demod.path) as fp: payload = fp.read() try: return unicode(payload) except UnicodeDecodeError: data = payload.encode('hex').upper() return ' '.join(data[i:i + 2] for i in xrange(0, len(data), 2)) @receiver(models.signals.post_delete, sender=DemodData) def demoddata_remove_files(sender, instance, **kwargs): if instance.payload_demod: if os.path.isfile(instance.payload_demod.path): os.remove(instance.payload_demod.path)