143 lines
4.5 KiB
Python
143 lines
4.5 KiB
Python
from owrx.property import PropertyManager, PropertyLayer
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import importlib.util
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import os
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import logging
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import json
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from abc import ABC, abstractmethod
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logger = logging.getLogger(__name__)
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class ConfigNotFoundException(Exception):
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pass
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class ConfigError(object):
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def __init__(self, key, message):
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self.key = key
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self.message = message
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def __str__(self):
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return "Configuration Error (key: {0}): {1}".format(self.key, self.message)
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class ConfigMigrator(ABC):
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@abstractmethod
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def migrate(self, config):
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pass
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def renameKey(self, config, old, new):
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if old in config and not new in config:
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config[new] = config[old]
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del config[old]
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class ConfigMigratorVersion1(ConfigMigrator):
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def migrate(self, config):
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if "receiver_gps" in config:
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gps = config["receiver_gps"]
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config["receiver_gps"] = {"lat": gps[0], "lon": gps[1]}
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if "waterfall_auto_level_margin" in config:
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levels = config["waterfall_auto_level_margin"]
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config["waterfall_auto_level_margin"] = {"min": levels[0], "max": levels[1]}
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self.renameKey(config, "wsjt_queue_workers", "decoding_queue_workers")
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self.renameKey(config, "wsjt_queue_length", "decoding_queue_length")
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config["version"] = 2
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return config
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class ConfigMigratorVersion2(ConfigMigrator):
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def migrate(self, config):
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if "waterfall_colors" in config and any(v > 0xFFFFFF for v in config["waterfall_colors"]):
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config["waterfall_colors"] = [v >> 8 for v in config["waterfall_colors"]]
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return config
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class Config:
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sharedConfig = None
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currentVersion = 3
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migrators = {
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1: ConfigMigratorVersion1(),
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2: ConfigMigratorVersion2(),
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}
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@staticmethod
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def _loadPythonFile(file):
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spec = importlib.util.spec_from_file_location("config_webrx", file)
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cfg = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(cfg)
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pm = PropertyLayer()
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for name, value in cfg.__dict__.items():
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if name.startswith("__"):
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continue
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pm[name] = value
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return pm
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@staticmethod
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def _loadJsonFile(file):
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with open(file, "r") as f:
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pm = PropertyLayer()
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for k, v in json.load(f).items():
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pm[k] = v
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return pm
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@staticmethod
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def _loadConfig():
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for file in ["./settings.json", "/etc/openwebrx/config_webrx.py", "./config_webrx.py"]:
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try:
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if file.endswith(".py"):
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return Config._loadPythonFile(file)
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elif file.endswith(".json"):
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return Config._loadJsonFile(file)
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else:
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logger.warning("unsupported file type: %s", file)
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except FileNotFoundError:
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pass
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raise ConfigNotFoundException("no usable config found! please make sure you have a valid configuration file!")
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@staticmethod
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def get():
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if Config.sharedConfig is None:
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Config.sharedConfig = Config._migrate(Config._loadConfig())
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return Config.sharedConfig
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@staticmethod
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def store():
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with open("settings.json", "w") as file:
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json.dump(Config.get().__dict__(), file, indent=4)
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@staticmethod
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def validateConfig():
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pm = Config.get()
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errors = [Config.checkTempDirectory(pm)]
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return [e for e in errors if e is not None]
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@staticmethod
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def checkTempDirectory(pm: PropertyManager):
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key = "temporary_directory"
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if key not in pm or pm[key] is None:
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return ConfigError(key, "temporary directory is not set")
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if not os.path.exists(pm[key]):
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return ConfigError(key, "temporary directory doesn't exist")
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if not os.path.isdir(pm[key]):
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return ConfigError(key, "temporary directory path is not a directory")
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if not os.access(pm[key], os.W_OK):
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return ConfigError(key, "temporary directory is not writable")
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return None
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@staticmethod
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def _migrate(config):
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version = config["version"] if "version" in config else 1
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if version == Config.currentVersion:
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return config
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logger.debug("migrating config from version %i", version)
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migrators = [Config.migrators[i] for i in range(version, Config.currentVersion)]
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for migrator in migrators:
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config = migrator.migrate(config)
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return config
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