272 lines
9.7 KiB
Python
Executable File
272 lines
9.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-FileCopyrightText: 2020-2021 Andrius Štikonas <andrius@stikonas.eu>
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# SPDX-FileCopyrightText: 2021 Dave O'Connor <daveoc@google.com>
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# SPDX-License-Identifier: MIT
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import types
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import asyncio
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import inspect
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import argparse
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import datetime
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from functools import partial
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from neohubapi.neohub import NeoHub
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from neohubapi.neostat import NeoStat
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from neohubapi.enums import ScheduleFormat
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class Error(Exception):
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pass
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class NeoHubCLIUsageError(Error):
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pass
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class NeoHubCLIInternalError(Error):
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pass
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class NeoHubCLIArgumentError(Error):
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pass
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class NeoHubCLI(object):
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"""A runner for neohub_cli operations."""
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def __init__(self, command, args, hub_ip=None, hub_port=4242):
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self._hub = NeoHub(host=hub_ip, port=hub_port)
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self._command = command
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self._args = args
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# live data cached from the neohub. We assume this data will remain current
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# throughout the execution of the script.
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self._live_data = None
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if command == 'help':
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return
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if command not in self._hub_command_methods():
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raise NeoHubCLIUsageError(f'Unknown command {command}')
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def _hub_command_methods(self):
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"""Return a list of NeoHub functions.
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Right now this is just all methods not starting with _
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"""
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all_methods = [
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m for m in dir(self._hub) if inspect.ismethod(getattr(self._hub, m))]
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return [m for m in all_methods if not m.startswith('_')]
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async def callable(self):
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"""Return a bound callable for the method we want, or None."""
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if self._command == 'help':
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print(self.get_help(self._args))
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return None
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# Firstly, see if we have a separately-implemented exception below.
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special_method = getattr(self, f'_callable_{self._command}', None)
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if special_method:
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return special_method()
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hubmethod = getattr(self._hub, self._command)
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sig = inspect.signature(hubmethod)
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if len(sig.parameters) == 0:
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# No arguments
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return hubmethod
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# See if we have the right numer of command line arguments.
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if len(sig.parameters) != len(self._args):
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print(f'Expecting {len(sig.parameters)} args for {self._command}, got {len(self._args)}')
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print(self.get_help([self._command]))
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return None
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# Next, see if all our arguments are annotated correctly.
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# Several methods ask for [NeoStat] (i.e. a list of NeoStat objects).
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# Cover for this case, without getting into expanding lists of other things.
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# (Yes, this means we only support passing one neostat name per CLI command, for now).
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arg_types = []
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for p in sig.parameters:
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a = sig.parameters[p].annotation
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if type(a) == type:
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arg_types.append(a)
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elif type(a) == list:
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if a[0] == NeoStat:
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arg_types.append(a[0])
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else:
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raise NeoHubCLIInternalError(f'Command {self._command} argument not bindable: {a[0]}')
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else:
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raise NeoHubCLIInternalError(f'Unexpected para annotation in {self._command}: {a}')
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if inspect._empty not in arg_types:
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# build a list comprising the 'real' objects represented.
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real_args = []
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for i in range(len(self._args)):
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try:
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real_args.append(await self._parse_arg(self._args[i], arg_types[i]))
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except NeoHubCLIArgumentError:
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raise
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except NeoHubCLIInternalError:
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print('Internal Error:')
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raise
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return partial(getattr(self._hub, self._command), *real_args)
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# No special method and un-annotated params.
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print(f'Cannot do {self._command} (yet)')
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return None
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async def _parse_arg(self, arg, argtype):
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"""Return the desired type, given the string version of arg.
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This also does things liks parsing dates, etc.
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"""
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if argtype == int:
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if not arg.isnumeric():
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raise NeoHubCLIArgumentError(f'argument to {self._command} must be numeric')
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return int(arg)
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elif argtype == str:
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return str(arg)
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elif argtype == bool:
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if arg in ('1', 'True', 'true', 'on', 'y'):
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away = True
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elif arg in ('0', 'False', 'false', 'off', 'n'):
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away = False
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else:
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raise NeoHubCLIArgumentError(f'\'{arg}\' not recognised as boolean')
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return away
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elif argtype == ScheduleFormat:
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sf = getattr(ScheduleFormat, arg, None)
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if not sf:
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raise NeoHubCLIArgumentError(
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f'argument must be in {[x.name for x in ScheduleFormat]}')
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return sf
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elif argtype == datetime.datetime:
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try:
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dt = datetime.datetime.strptime(arg, '%Y-%m-%d %H:%M:%S')
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except ValueError:
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raise NeoHubCLIArgumentError('dates must be in format "YYYY-MM-DD HH:MM:SS"')
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return dt
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elif argtype == NeoStat:
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# We assume the cmdline argument is the thermostat name.
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if not self._live_data:
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# (hub_data, devices)
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self._live_data = await self._hub.get_live_data()
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found = [x for x in self._live_data[1]['thermostats'] if x.name == arg]
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if found:
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# methods always expect a list of these.
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return [found[0]]
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else:
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raise NeoHubCLIArgumentError(f'No such thermostat: {arg}')
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else:
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raise NeoHubCLIInternalError(f'Unknown type {type(argtype)} {argtype} for {self._command}')
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def _callable_set_date(self):
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"""Build a callable for set_date."""
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# If we got an arg, assume it's a date, otherwise use today.
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if len(self._args) > 1:
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print('set_date takes zero or one argument')
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return None
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elif len(self._args) == 1:
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real_arg = self._parse_arg(self._args[0], datetime.datetime)
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return partial(getattr(self._hub, 'set_date'), *[real_arg])
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else:
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return partial(getattr(self._hub, 'set_date'), *[datetime.datetime.today()])
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def output(self, raw_result, output_format='json'):
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"""Produce output in a desired format."""
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if output_format == 'raw':
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return raw_result
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# Right now, everything just returns hub data or a single outcome
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# except get_live_data. Handle special cases.
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special_case = getattr(self, f'_output_{self._command}', None)
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if special_case:
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return special_case(raw_result, output_format)
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if type(raw_result) == bool:
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return 'Command Succeeded' if raw_result else 'Command Failed'
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if type(raw_result) in (int, str):
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return f'{raw_result}'
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if type(raw_result) != types.SimpleNamespace:
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raise NeoHubCLIInternalError(
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f'Unexpected type {type(raw_result)} in output()')
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return self._output_simplenamespace(raw_result, output_format)
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def _output_simplenamespace(self, obj, output_format):
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"""Output a types.Simplenamespace object."""
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if output_format == 'list':
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attrs = dict(
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[(a, getattr(obj, a)) for a in dir(obj)
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if not a.startswith('_')])
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return '\n'.join([f'{a}: {attrs[a]}' for a in attrs])
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else:
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raise NeoHubCLIUsageError(f'Unknown output format {output_format}')
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def _output_get_live_data(self, raw_result, output_format):
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"""Return special case output for get_live_data."""
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out = self._output_simplenamespace(raw_result[0], output_format)
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out += '\n\n'
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for device_type in raw_result[1]:
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out += f'{device_type}:\n'
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devices = raw_result[1][device_type]
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for d in devices:
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out += str(d) + '\n'
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return out
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def get_help(self, args):
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"""Print help on what commands do"""
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if len(args) == 0:
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ret = 'Valid commands:\n\n'
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for cmd in self._hub_command_methods():
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ret += f' - {cmd}\n'
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return ret
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# handle 'help <blah>'
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if args[0] not in self._hub_command_methods():
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return f'Command {args[0]} not known'
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docstr = getattr(self._hub, args[0]).__doc__ or 'No help for {args[0]}'
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sig = inspect.signature(getattr(self._hub, args[0]))
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ret = f'{args[0]}:\n'
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if len(sig.parameters) == 0:
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ret += ' - No Arguments\n'
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else:
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for s in sig.parameters:
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ret += f' - {sig.parameters[s]}\n'
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return f'{ret}\n{docstr}\n'
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async def main():
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argp = argparse.ArgumentParser(description='CLI to neohub devices')
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argp.add_argument('--hub_ip', help='IP address of NeoHub', default=None)
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argp.add_argument(
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'--hub_port', help='Port number of NeoHub to talk to', default=4242)
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argp.add_argument('--format', help='Output format', default='list')
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argp.add_argument('command', help='Command to issue')
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argp.add_argument('arg', help='Arguments to command', nargs='*')
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args = argp.parse_args()
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try:
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nhc = NeoHubCLI(
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args.command,
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args.arg,
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hub_ip=args.hub_ip,
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hub_port=args.hub_port)
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m = await nhc.callable()
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if m:
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result = await m()
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print(nhc.output(result, output_format=args.format))
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except Error as e:
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print(e)
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if __name__ == '__main__':
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asyncio.run(main())
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