mirror of
https://github.com/GNS3/gns3-gui.git
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94 lines
3.0 KiB
Python
94 lines
3.0 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2016 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from .qt import QtCore
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from .controller import Controller
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from .local_config import LocalConfig
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from .settings import GENERAL_SETTINGS
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import logging
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log = logging.getLogger(__name__)
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class ApplianceManager(QtCore.QObject):
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"""
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Manager for appliances.
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"""
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appliances_changed_signal = QtCore.Signal()
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def __init__(self):
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super().__init__()
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self._appliances = []
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self._controller = Controller.instance()
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self._controller.connected_signal.connect(self.refresh)
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self._controller.disconnected_signal.connect(self._controllerDisconnectedSlot)
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def refresh(self, update=False):
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"""
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Gets the appliances from the controller.
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"""
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if self._controller.connected():
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settings = LocalConfig.instance().loadSectionSettings("MainWindow", GENERAL_SETTINGS)
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symbol_theme = settings["symbol_theme"]
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if update is True:
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self._controller.get("/appliances?update=yes&symbol_theme={}".format(symbol_theme), self._listAppliancesCallback, progressText="Downloading appliances from online registry...")
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else:
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self._controller.get("/appliances?symbol_theme={}".format(symbol_theme), self._listAppliancesCallback)
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def _controllerDisconnectedSlot(self):
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"""
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Called when the controller has been disconnected.
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"""
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self._appliances = []
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self.appliances_changed_signal.emit()
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def appliances(self):
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"""
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Returns the appliances.
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:returns: array of appliances
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"""
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return self._appliances
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def _listAppliancesCallback(self, result, error=False, **kwargs):
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"""
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Callback to get the appliances.
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"""
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if error is True:
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log.error("Error while getting appliances list: {}".format(result.get("message", "unknown")))
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return
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self._appliances = result
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self.appliances_changed_signal.emit()
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@staticmethod
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def instance():
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"""
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Singleton to return only on instance of ApplianceManager.
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:returns: instance of ApplianceManager
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"""
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if not hasattr(ApplianceManager, '_instance') or ApplianceManager._instance is None:
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ApplianceManager._instance = ApplianceManager()
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return ApplianceManager._instance
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