infoex-autowx.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 """
   5 InfoEx <-> NRCS/MesoWest Auto Wx implementation
   6 Alexander Vasarab
   7 Wylark Mountaineering LLC
   8
   9 This program fetches data from either an NRCS SNOTEL site or MesoWest
  10 weather station and pushes it to InfoEx using the new automated weather
  11 system implementation.
  12
  13 It is designed to be run hourly, and it asks for the last three hours
  14 of data of each desired type, and selects the most recent one. This
  15 lends some resiliency to the process and helps ensure that we have a
  16 value to send, but it can lead to somewhat inconsistent/untruthful
  17 data if e.g. the HS is from the last hour but the tempPres is from two
  18 hours ago because the instrumentation had a hiccup. It's worth
  19 considering if this is a bug or a feature.
  20
  21 For more information, see file: README
  22 For licensing, see file: LICENSE
  23 """
  24
  25 import configparser
  26 import csv
  27 import datetime
  28 import logging
  29 import os
  30 import sys
  31 import time
  32
  33 from ftplib import FTP
  34 from optparse import OptionParser
  35
  36 import requests
  37
  38 import zeep
  39 import zeep.cache
  40 import zeep.transports
  41
  42 __version__ = '2.0.0'
  43
  44 LOG = logging.getLogger(__name__)
  45 LOG.setLevel(logging.NOTSET)
  46
  47 def get_parser():
  48     """Return OptionParser for this program"""
  49     parser = OptionParser(version=__version__)
  50
  51     parser.add_option("--config",
  52         dest="config",
  53         metavar="FILE",
  54         help="location of config file")
  55
  56     parser.add_option("--log-level",
  57         dest="log_level",
  58         default=None,
  59         help="set the log level (debug, info, warning)")
  60
  61     parser.add_option("--dry-run",
  62         action="store_true",
  63         dest="dry_run",
  64         default=False,
  65         help="fetch data but don't upload to InfoEx")
  66
  67     return parser
  68
  69 def setup_config(config):
  70     """Setup config variable based on values specified in the ini file"""
  71     try:
  72         infoex = {
  73             'host': config['infoex']['host'],
  74             'uuid': config['infoex']['uuid'],
  75             'api_key': config['infoex']['api_key'],
  76             'csv_filename': config['infoex']['csv_filename'],
  77             'location_uuid': config['infoex']['location_uuid'],
  78             'wx_data': {}, # placeholder key, values to come later
  79         }
  80
  81         station = dict()
  82         station['provider'] = config['station']['type']
  83
  84         if station['provider'] not in ['nrcs', 'mesowest']:
  85             print("Please specify either nrcs or mesowest as the station type.")
  86             sys.exit(1)
  87
  88         if station['provider'] == 'nrcs':
  89             station['source'] = 'https://www.wcc.nrcs.usda.gov/awdbWebService/services?WSDL'
  90             station['station_id'] = config['station']['station_id']
  91
  92             try:
  93                 station['desired_data'] = config['station']['desired_data'].split(',')
  94             except:
  95                 # desired_data malformed or missing, setting default
  96                 station['desired_data'] = [
  97                                        'TOBS', # AIR TEMPERATURE OBSERVED (degF)
  98                                        'SNWD', # SNOW DEPTH (in)
  99                                        'PREC'  # PRECIPITATION ACCUMULATION (in)
 100                                        ]
 101
 102             # XXX: For NRCS, we're manually overriding units for now! Once
 103             #      unit conversion is supported for NRCS, REMOVE THIS!
 104             if 'units' not in station:
 105                 station['units'] = 'imperial'
 106
 107         if station['provider'] == 'mesowest':
 108             station['source'] = 'https://api.synopticdata.com/v2/stations/timeseries'
 109             station['station_id'] = config['station']['station_id']
 110             station['units'] = config['station']['units']
 111
 112             try:
 113                 station['desired_data'] = config['station']['desired_data']
 114             except:
 115                 # desired_data malformed or missing, setting default
 116                 station['desired_data'] = 'air_temp,snow_depth'
 117
 118             # construct full API URL (sans start/end time, added later)
 119             station['source'] = station['source'] + '?token=' + config['station']['token'] + '&within=60&units=' + station['units'] + '&stid=' + station['station_id'] + '&vars=' + station['desired_data']
 120
 121     except KeyError as e:
 122         LOG.critical("%s not defined in %s" % (e, options.config))
 123         exit(1)
 124     except Exception as exc:
 125         LOG.critical("Exception occurred in config parsing: '%s'" % (exc))
 126         exit(1)
 127
 128     # all sections/values present in config file, final sanity check
 129     try:
 130         for key in config.sections():
 131             for subkey in config[key]:
 132                 if not len(config[key][subkey]):
 133                     raise ValueError;
 134     except ValueError as exc:
 135         LOG.critical("Config value '%s.%s' is empty" % (key, subkey))
 136         exit(1)
 137
 138     return (infoex, station)
 139
 140 def setup_logging(log_level):
 141     """Setup our logging infrastructure"""
 142     try:
 143         from systemd.journal import JournalHandler
 144         LOG.addHandler(JournalHandler())
 145     except:
 146         ## fallback to syslog
 147         #import logging.handlers
 148         #LOG.addHandler(logging.handlers.SysLogHandler())
 149         # fallback to stdout
 150         handler = logging.StreamHandler(sys.stdout)
 151         LOG.addHandler(handler)
 152
 153     # ugly, but passable
 154     if log_level in [None, 'debug', 'info', 'warning']:
 155         if log_level == 'debug':
 156             LOG.setLevel(logging.DEBUG)
 157         elif log_level == 'info':
 158             LOG.setLevel(logging.INFO)
 159         elif log_level == 'warning':
 160             LOG.setLevel(logging.WARNING)
 161         else:
 162             LOG.setLevel(logging.NOTSET)
 163     else:
 164         return False
 165
 166     return True
 167
 168 def main():
 169     """Main routine: sort through args, decide what to do, then do it"""
 170     parser = get_parser()
 171     (options, args) = parser.parse_args()
 172
 173     config = configparser.ConfigParser(allow_no_value=False)
 174
 175     if not options.config:
 176         parser.print_help()
 177         print("\nPlease specify a configuration file via --config.")
 178         sys.exit(1)
 179
 180     config.read(options.config)
 181
 182     if not setup_logging(options.log_level):
 183         parser.print_help()
 184         print("\nPlease select an appropriate log level or remove the switch (--log-level).")
 185         sys.exit(1)
 186
 187     (infoex, station) = setup_config(config)
 188
 189     LOG.debug('Config parsed, starting up')
 190
 191     # create mappings
 192     (fmap, final_data) = setup_infoex_fields_mapping(infoex['location_uuid'])
 193     iemap = setup_infoex_counterparts_mapping(station['provider'])
 194
 195     # override units if user selected metric
 196     #
 197     # NOTE: to update this, use the fmap<->final_data mapping laid out above
 198     #
 199     # NOTE: this only 'works' with MesoWest for now, as the MesoWest API
 200     #       itself handles the unit conversion; in the future, we will also
 201     #       support NRCS unit conversion, but this must be done by this
 202     #       program.
 203     if station['units'] == 'metric':
 204         final_data[fmap['tempPresUnit']] = 'C'
 205         final_data[fmap['hsUnit']] = 'm'
 206         final_data[fmap['windSpeedUnit']] = 'm/s'
 207         final_data[fmap['windGustSpeedNumUnit']] = 'm/s'
 208
 209     # floor time to nearest hour
 210     dt = datetime.datetime.now()
 211     end_date = dt - datetime.timedelta(minutes=dt.minute % 60,
 212                                        seconds=dt.second,
 213                                        microseconds=dt.microsecond)
 214     begin_date = end_date - datetime.timedelta(hours=3)
 215
 216     # get the data
 217     LOG.debug("Getting %s data from %s to %s" % (str(station['desired_data']),
 218         str(begin_date), str(end_date)))
 219
 220     time_all_elements = time.time()
 221
 222     # get the data
 223     if station['provider'] == 'nrcs':
 224         infoex['wx_data'] = get_nrcs_data(begin_date, end_date, station)
 225     elif station['provider'] == 'mesowest':
 226         infoex['wx_data'] = get_mesowest_data(begin_date, end_date,
 227                 station)
 228
 229     LOG.info("Time taken to get all data : %.3f sec" % (time.time() -
 230         time_all_elements))
 231
 232     LOG.debug("infoex[wx_data]: %s", str(infoex['wx_data']))
 233
 234     # Now we only need to add in what we want to change thanks to that
 235     # abomination of a variable declaration earlier
 236     final_data[fmap['Location UUID']] = infoex['location_uuid']
 237     final_data[fmap['obDate']] = end_date.strftime('%m/%d/%Y')
 238     final_data[fmap['obTime']] = end_date.strftime('%H:%M')
 239
 240     for elementCd in infoex['wx_data']:
 241         if elementCd not in iemap:
 242             LOG.warning("BAD KEY wx_data['%s']" % (elementCd))
 243             continue
 244
 245         # CONSIDER: Casting every value to Float() -- need to investigate if
 246         #           any possible elementCds we may want are any other data
 247         #           type than float.
 248         #
 249         #           Another possibility is to query the API with
 250         #           getStationElements and temporarily store the
 251         #           storedUnitCd. But that's pretty network-intensive and
 252         #           may not even be worth it if there's only e.g. one or two
 253         #           exceptions to any otherwise uniformly Float value set.
 254         final_data[fmap[iemap[elementCd]]] = infoex['wx_data'][elementCd]
 255
 256     LOG.debug("final_data: %s" % (str(final_data)))
 257
 258     if not write_local_csv(infoex['csv_filename'], final_data):
 259         LOG.warning('Could not write local CSV file: %s',
 260                     infoex['csv_filename'])
 261         return 1;
 262
 263     if not options.dry_run:
 264         upload_csv(infoex['csv_filename'], infoex)
 265
 266     LOG.debug('DONE')
 267     return 0
 268
 269 # data structure operations
 270 def setup_infoex_fields_mapping(location_uuid):
 271     """
 272     Create a mapping of InfoEx fields to the local data's indexing scheme.
 273
 274     INFOEX FIELDS
 275
 276     This won't earn style points in Python, but here we establish a couple
 277     of helpful mappings variables. The reason this is helpful is that the
 278     end result is simply an ordered set, the CSV file. But we still may
 279     want to manipulate the values arbitrarily before writing that file.
 280
 281     Also note that the current Auto Wx InfoEx documentation shows these
 282     keys in a graphical table with the "index" beginning at 1, but here we
 283     sanely index beginning at 0.
 284     """
 285     fmap = {}                           ; final_data     = [None] * 29
 286     fmap['Location UUID'] = 0           ; final_data[0]  = location_uuid
 287     fmap['obDate'] = 1                  ; final_data[1]  = None
 288     fmap['obTime'] = 2                  ; final_data[2]  = None
 289     fmap['timeZone'] = 3                ; final_data[3]  = 'Pacific'
 290     fmap['tempMaxHour'] = 4             ; final_data[4]  = None
 291     fmap['tempMaxHourUnit'] = 5         ; final_data[5]  = 'F'
 292     fmap['tempMinHour'] = 6             ; final_data[6]  = None
 293     fmap['tempMinHourUnit'] = 7         ; final_data[7]  = 'F'
 294     fmap['tempPres'] = 8                ; final_data[8]  = None
 295     fmap['tempPresUnit'] = 9            ; final_data[9]  = 'F'
 296     fmap['precipitationGauge'] = 10     ; final_data[10] = None
 297     fmap['precipitationGaugeUnit'] = 11 ; final_data[11] = 'in'
 298     fmap['windSpeedNum'] = 12           ; final_data[12] = None
 299     fmap['windSpeedUnit'] = 13          ; final_data[13] = 'mph'
 300     fmap['windDirectionNum'] = 14       ; final_data[14] = None
 301     fmap['hS'] = 15                     ; final_data[15] = None
 302     fmap['hsUnit'] = 16                 ; final_data[16] = 'in'
 303     fmap['baro'] = 17                   ; final_data[17] = None
 304     fmap['baroUnit'] = 18               ; final_data[18] = 'inHg'
 305     fmap['rH'] = 19                     ; final_data[19] = None
 306     fmap['windGustSpeedNum'] = 20       ; final_data[20] = None
 307     fmap['windGustSpeedNumUnit'] = 21   ; final_data[21] = 'mph'
 308     fmap['windGustDirNum'] = 22         ; final_data[22] = None
 309     fmap['dewPoint'] = 23               ; final_data[23] = None
 310     fmap['dewPointUnit'] = 24           ; final_data[24] = 'F'
 311     fmap['hn24Auto'] = 25               ; final_data[25] = None
 312     fmap['hn24AutoUnit'] = 26           ; final_data[26] = 'in'
 313     fmap['hstAuto'] = 27                ; final_data[27] = None
 314     fmap['hstAutoUnit'] = 28            ; final_data[28] = 'in'
 315
 316     return (fmap, final_data)
 317
 318 def setup_infoex_counterparts_mapping(provider):
 319     """
 320     Create a mapping of the NRCS/MesoWest fields that this program supports to
 321     their InfoEx counterparts
 322     """
 323     iemap = {}
 324
 325     if provider == 'nrcs':
 326         iemap['PREC'] = 'precipitationGauge'
 327         iemap['TOBS'] = 'tempPres'
 328         iemap['SNWD'] = 'hS'
 329         iemap['PRES'] = 'baro'
 330         iemap['RHUM'] = 'rH'
 331         iemap['WSPD'] = 'windSpeedNum'
 332         iemap['WDIR'] = 'windDirectionNum'
 333         # unsupported by NRCS:
 334         # windGustSpeedNum
 335     elif provider == 'mesowest':
 336         iemap['precip_accum'] = 'precipitationGauge'
 337         iemap['air_temp'] = 'tempPres'
 338         iemap['snow_depth'] = 'hS'
 339         iemap['pressure'] = 'baro'
 340         iemap['relative_humidity'] = 'rH'
 341         iemap['wind_speed'] = 'windSpeedNum'
 342         iemap['wind_direction'] = 'windDirectionNum'
 343         iemap['wind_gust'] = 'windGustSpeedNum'
 344
 345     return iemap
 346
 347 # provider-specific operations
 348 def get_nrcs_data(begin, end, station):
 349     """get the data we're after from the NRCS WSDL"""
 350     transport = zeep.transports.Transport(cache=zeep.cache.SqliteCache())
 351     client = zeep.Client(wsdl=station['source'], transport=transport)
 352     remote_data = {}
 353
 354     for elementCd in station['desired_data']:
 355         time_element = time.time()
 356
 357         # get the last three hours of data for this elementCd
 358         tmp = client.service.getHourlyData(
 359                 stationTriplets=[station['station_id']],
 360                 elementCd=elementCd,
 361                 ordinal=1,
 362                 beginDate=begin,
 363                 endDate=end)
 364
 365         LOG.info("Time to get elementCd '%s': %.3f sec" % (elementCd,
 366             time.time() - time_element))
 367
 368         values = tmp[0]['values']
 369
 370         # sort and isolate the most recent
 371         #
 372         # NOTE: we do this because sometimes there are gaps in hourly data
 373         #       in NRCS; yes, we may end up with slightly inaccurate data,
 374         #       so perhaps this decision will be re-evaluated in the future
 375         if values:
 376             ordered = sorted(values, key=lambda t: t['dateTime'], reverse=True)
 377             remote_data[elementCd] = ordered[0]['value']
 378         else:
 379             remote_data[elementCd] = None
 380
 381     return remote_data
 382
 383 def get_mesowest_data(begin, end, station):
 384     """get the data we're after from the MesoWest/Synoptic API"""
 385     remote_data = {}
 386
 387     # massage begin/end date format
 388     begin_date_str = begin.strftime('%Y%m%d%H%M')
 389     end_date_str = end.strftime('%Y%m%d%H%M')
 390
 391     # construct final, completed API URL
 392     api_req_url = station['source'] + '&start=' + begin_date_str + '&end=' + end_date_str
 393     req = requests.get(api_req_url)
 394
 395     try:
 396         json = req.json()
 397     except ValueError:
 398         LOG.error("Bad JSON in MesoWest response")
 399         sys.exit(1)
 400
 401     try:
 402         observations = json['STATION'][0]['OBSERVATIONS']
 403     except ValueError:
 404         LOG.error("Bad JSON in MesoWest response")
 405         sys.exit(1)
 406
 407     pos = len(observations['date_time']) - 1
 408
 409     for elementCd in station['desired_data'].split(','):
 410         # sort and isolate the most recent, see note above in NRCS for how and
 411         # why this is done
 412         #
 413         # NOTE: Unlike in the NRCS case, the MesoWest API response contains all
 414         #       data (whereas with NRCS, we have to make a separate request for
 415         #       each element we want). This is nice for network efficiency but
 416         #       it means we have to handle this part differently for each.
 417         #
 418         # NOTE: Also unlike NRCS, MesoWest provides more granular data; NRCS
 419         #       provides hourly data, but MesoWest can often provide data every
 420         #       10 minutes -- though this provides more opportunity for
 421         #       irregularities
 422
 423         # we may not have the data at all
 424         key_name = elementCd + '_set_1'
 425         if key_name in observations:
 426             if observations[key_name][pos]:
 427                 remote_data[elementCd] = observations[key_name][pos]
 428             else:
 429                 remote_data[elementCd] = None
 430         else:
 431             remote_data[elementCd] = None
 432
 433     return remote_data
 434
 435 # CSV operations
 436 def write_local_csv(path_to_file, data):
 437     """Write the specified CSV file to disk"""
 438     with open(path_to_file, 'w') as f:
 439         # The requirement is that empty values are represented in the CSV
 440         # file as "", csv.QUOTE_NONNUMERIC achieves that
 441         LOG.debug("writing CSV file '%s'" % (path_to_file))
 442         writer = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC)
 443         writer.writerow(data)
 444         f.close()
 445     return True
 446
 447 def upload_csv(path_to_file, infoex_data):
 448     """Upload the specified CSV file to InfoEx FTP and remove the file"""
 449     with open(path_to_file, 'rb') as file_object:
 450         LOG.debug("uploading FTP file '%s'" % (infoex_data['host']))
 451         ftp = FTP(infoex_data['host'], infoex_data['uuid'],
 452                   infoex_data['api_key'])
 453         ftp.storlines('STOR ' + path_to_file, file_object)
 454         ftp.close()
 455         file_object.close()
 456     os.remove(path_to_file)
 457
 458 if __name__ == "__main__":
 459     sys.exit(main())