118 lines
3.8 KiB
Python
118 lines
3.8 KiB
Python
from owrx.config import Config
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from owrx.property import PropertyManager, PropertyDeleted, PropertyDelegator, PropertyLayer
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from owrx.feature import FeatureDetector, UnknownFeatureException
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from functools import partial
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import logging
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logger = logging.getLogger(__name__)
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class MappedSdrSources(PropertyDelegator):
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def __init__(self, pm: PropertyManager):
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self.subscriptions = {}
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super().__init__(PropertyLayer())
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for key, value in pm.items():
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self._addSource(key, value)
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pm.wire(self.handleSdrDeviceChange)
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def handleSdrDeviceChange(self, changes):
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for key, value in changes.items():
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if value is PropertyDeleted:
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del self[key]
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else:
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self._addSource(key, value)
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def handleDeviceUpdate(self, key, value, changes):
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if self.isDeviceValid(value) and key not in self:
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self._addSource(key, value)
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elif not self.isDeviceValid(value) and key in self:
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self._removeSource(key)
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def _addSource(self, key, value):
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if self.isDeviceValid(value):
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self[key] = self.buildNewSource(key, value)
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updateMethod = partial(self.handleDeviceUpdate, key, value)
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self.subscriptions[key] = [
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value.filter("type", "profiles").wire(updateMethod),
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value["profiles"].wire(updateMethod)
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]
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def _removeSource(self, key):
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if key in self:
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self[key].shutdown()
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for sub in self.subscriptions[key]:
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sub.cancel()
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del self.subscriptions[key]
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def isDeviceValid(self, device):
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return self._hasProfiles(device) and self._sdrTypeAvailable(device)
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def _hasProfiles(self, device):
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return "profiles" in device and device["profiles"] and len(device["profiles"]) > 0
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def _sdrTypeAvailable(self, value):
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featureDetector = FeatureDetector()
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try:
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if not featureDetector.is_available(value["type"]):
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logger.error(
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'The SDR source type "{0}" is not available. please check requirements.'.format(
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value["type"]
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)
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)
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return False
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return True
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except UnknownFeatureException:
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logger.error(
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'The SDR source type "{0}" is invalid. Please check your configuration'.format(value["type"])
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)
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return False
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def buildNewSource(self, id, props):
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sdrType = props["type"]
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className = "".join(x for x in sdrType.title() if x.isalnum()) + "Source"
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module = __import__("owrx.source.{0}".format(sdrType), fromlist=[className])
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cls = getattr(module, className)
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return cls(id, props)
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def __setitem__(self, key, value):
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if key in self:
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self._removeSource(key)
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super().__setitem__(key, value)
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def __delitem__(self, key):
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if key in self:
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self._removeSource(key)
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super().__delitem__(key)
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class SdrService(object):
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sources = None
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@staticmethod
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def getFirstSource():
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sources = SdrService.getSources()
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if not sources:
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return None
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# TODO: configure default sdr in config? right now it will pick the first one off the list.
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return sources[list(sources.keys())[0]]
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@staticmethod
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def getSource(id):
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sources = SdrService.getSources()
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if not sources:
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return None
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if id not in sources:
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return None
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return sources[id]
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@staticmethod
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def getSources():
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if SdrService.sources is None:
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SdrService.sources = MappedSdrSources(Config.get()["sdrs"])
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return {
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key: s
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for key, s in SdrService.sources.items()
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if not s.isFailed() and s.isEnabled()
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}
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