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67 lines
2.5 KiB
Python
67 lines
2.5 KiB
Python
# Save arbitrary variables so that values can be kept across restarts.
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#
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# Copyright (C) 2020 Dushyant Ahuja <dusht.ahuja@gmail.com>
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# Copyright (C) 2016-2020 Kevin O'Connor <kevin@koconnor.net>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import os, logging, ast, configparser
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class SaveVariables:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.filename = os.path.expanduser(config.get('filename'))
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self.allVariables = {}
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try:
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if not os.path.exists(self.filename):
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open(self.filename, "w").close()
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self.loadVariables()
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except self.printer.command_error as e:
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raise config.error(str(e))
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gcode = self.printer.lookup_object('gcode')
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gcode.register_command('SAVE_VARIABLE', self.cmd_SAVE_VARIABLE,
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desc=self.cmd_SAVE_VARIABLE_help)
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def loadVariables(self):
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allvars = {}
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varfile = configparser.ConfigParser()
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try:
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varfile.read(self.filename)
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if varfile.has_section('Variables'):
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for name, val in varfile.items('Variables'):
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allvars[name] = ast.literal_eval(val)
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except:
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msg = "Unable to parse existing variable file"
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logging.exception(msg)
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raise self.printer.command_error(msg)
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self.allVariables = allvars
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cmd_SAVE_VARIABLE_help = "Save arbitrary variables to disk"
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def cmd_SAVE_VARIABLE(self, gcmd):
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varname = gcmd.get('VARIABLE')
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if (varname.lower() != varname):
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raise gcmd.error("VARIABLE must not contain upper case")
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value = gcmd.get('VALUE')
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try:
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value = ast.literal_eval(value)
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except ValueError as e:
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raise gcmd.error("Unable to parse '%s' as a literal" % (value,))
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newvars = dict(self.allVariables)
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newvars[varname] = value
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# Write file
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varfile = configparser.ConfigParser()
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varfile.add_section('Variables')
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for name, val in sorted(newvars.items()):
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varfile.set('Variables', name, repr(val))
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try:
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f = open(self.filename, "w")
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varfile.write(f)
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f.close()
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except:
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msg = "Unable to save variable"
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logging.exception(msg)
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raise gcmd.error(msg)
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self.loadVariables()
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def get_status(self, eventtime):
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return {'variables': self.allVariables}
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def load_config(config):
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return SaveVariables(config)
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