Controller.py

"""Controller class for geomag algorithms"""
from __future__ import absolute_import, print_function
from builtins import str as unicode

import argparse
import sys
from io import BytesIO
from obspy.core import Stream, UTCDateTime
from .algorithm import algorithms, AlgorithmException
from .PlotTimeseriesFactory import PlotTimeseriesFactory
from .StreamTimeseriesFactory import StreamTimeseriesFactory
from . import TimeseriesUtility, Util

# factory packages
from . import binlog
from . import edge
from . import iaga2002
from . import imfjson
from . import pcdcp
from . import imfv122
from . import imfv283
from . import temperature
from . import vbf


class Controller(object):
    """Controller for geomag algorithms.

    Parameters
    ----------
    inputFactory: TimeseriesFactory
        the factory that will read in timeseries data
    outputFactory: TimeseriesFactory
        the factory that will output the timeseries data
    algorithm: Algorithm
        the algorithm(s) that will procees the timeseries data

    Notes
    -----
    Has 2 basic modes.
    Run simply sends all the data in a stream to edge. If a startime/endtime is
        provided, it will send the data from the stream that is within that
        time span.
    Update will update any data that has changed between the source, and
        the target during a given timeframe. It will also attempt to
        recursively backup so it can update all missing data.
    """

    def __init__(self, inputFactory, outputFactory, algorithm):
        self._inputFactory = inputFactory
        self._algorithm = algorithm
        self._outputFactory = outputFactory

    def _get_input_timeseries(self, observatory, channels, starttime, endtime):
        """Get timeseries from the input factory for requested options.

        Parameters
        ----------
        observatory : array_like
            observatories to request.
        channels : array_like
            channels to request.
        starttime : obspy.core.UTCDateTime
            time of first sample to request.
        endtime : obspy.core.UTCDateTime
            time of last sample to request.
        renames : array_like
            list of channels to rename
            each list item should be array_like:
                the first element is the channel to rename,
                the last element is the new channel name

        Returns
        -------
        timeseries : obspy.core.Stream
        """
        timeseries = Stream()
        for obs in observatory:
            # get input interval for observatory
            # do this per observatory in case an
            # algorithm needs different amounts of data
            input_start, input_end = self._algorithm.get_input_interval(
                    start=starttime,
                    end=endtime,
                    observatory=obs,
                    channels=channels)
            if input_start is None or input_end is None:
                continue
            timeseries += self._inputFactory.get_timeseries(
                    observatory=obs,
                    starttime=input_start,
                    endtime=input_end,
                    channels=channels)
        return timeseries

    def _rename_channels(self, timeseries, renames):
        """Rename trace channel names.

        Parameters
        ----------
        timeseries : obspy.core.Stream
            stream with channels to rename
        renames : array_like
            list of channels to rename
            each list item should be array_like:
                the first element is the channel to rename,
                the last element is the new channel name

        Returns
        -------
        timeseries : obspy.core.Stream
        """
        for r in renames:
            from_name, to_name = r[0], r[-1]
            for t in timeseries.select(channel=from_name):
                t.stats.channel = to_name
        return timeseries

    def _get_output_timeseries(self, observatory, channels, starttime,
            endtime):
        """Get timeseries from the output factory for requested options.

        Parameters
        ----------
        observatory : array_like
            observatories to request.
        channels : array_like
            channels to request.
        starttime : obspy.core.UTCDateTime
            time of first sample to request.
        endtime : obspy.core.UTCDateTime
            time of last sample to request.

        Returns
        -------
        timeseries : obspy.core.Stream
        """
        timeseries = Stream()
        for obs in observatory:
            timeseries += self._outputFactory.get_timeseries(
                observatory=obs,
                starttime=starttime,
                endtime=endtime,
                channels=channels)
        return timeseries

    def run(self, options, input_timeseries=None):
        """run controller
        Parameters
        ----------
        options: dictionary
            The dictionary of all the command line arguments. Could in theory
            contain other options passed in by the controller.
        input_timeseries : obspy.core.Stream
            Used by run_as_update to save a double input read, since it has
            already read the input to confirm data can be produced.
        """
        algorithm = self._algorithm
        input_channels = options.inchannels or \
                algorithm.get_input_channels()
        output_channels = options.outchannels or \
                algorithm.get_output_channels()
        next_starttime = algorithm.get_next_starttime()
        starttime = next_starttime or options.starttime
        endtime = options.endtime
        # input
        timeseries = input_timeseries or self._get_input_timeseries(
                observatory=options.observatory,
                starttime=starttime,
                endtime=endtime,
                channels=input_channels)
        if timeseries.count() == 0:
            # no data to process
            return
        # pre-process
        if next_starttime and options.realtime:
            # when running a stateful algorithms with the realtime option
            # pad/trim timeseries to the interval:
            # [next_starttime, max(timeseries.endtime, now-options.realtime)]
            input_start, input_end = \
                    TimeseriesUtility.get_stream_start_end_times(
                            timeseries, without_gaps=True)
            realtime_gap = endtime - options.realtime
            if input_end < realtime_gap:
                input_end = realtime_gap
            # pad to the start of the "realtime gap"
            TimeseriesUtility.pad_timeseries(timeseries,
                    next_starttime, input_end)
        # process
        if options.rename_input_channel:
            timeseries = self._rename_channels(
                    timeseries=timeseries,
                    renames=options.rename_input_channel)
        processed = algorithm.process(timeseries)
        # trim if --no-trim is not set
        if not options.no_trim:
            processed.trim(starttime=starttime,
                    endtime=endtime)
        if options.rename_output_channel:
            processed = self._rename_channels(