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#! /usr/bin/env python
import ais
import sys
import ais.compatibility.gpsd
import ais.stream
args = {}
files = []
for arg in sys.argv[1:]:
if arg.startswith("--"):
arg = arg[2:]
if '=' in arg:
arg, value = arg.split("=", 1)
args[arg] = value
else:
args[arg] = True
else:
files.append(arg)
if "help" in args:
print """Usage: collecttypes.py < INFILE.nmea > OUTFILE.nmea
Collects one message of each type.
"""
sys.exit(0)
types = set()
for msg in ais.stream.decode(sys.stdin, keep_nmea=True, allowUnknown=True, allow_missing_timestamps=True):
if msg['id'] in types: continue
types.add(msg['id'])
sys.stdout.write(msg['nmea'])
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