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73 lines
2.0 KiB
73 lines
2.0 KiB
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 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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import aiohttp
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from .project import Project
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from uuid import UUID
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class ProjectManager:
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"""
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This singleton keeps track of available projects.
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"""
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def __init__(self):
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self._projects = {}
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@classmethod
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def instance(cls):
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"""
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Singleton to return only one instance of ProjectManager.
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:returns: instance of ProjectManager
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"""
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if not hasattr(cls, "_instance"):
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cls._instance = cls()
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return cls._instance
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def get_project(self, uuid):
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"""
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Returns a Project instance.
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:param uuid: Project UUID
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:returns: Project instance
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"""
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try:
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UUID(uuid, version=4)
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except ValueError:
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raise aiohttp.web.HTTPBadRequest(text="{} is not a valid UUID".format(uuid))
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if uuid not in self._projects:
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raise aiohttp.web.HTTPNotFound(text="Project UUID {} doesn't exist".format(uuid))
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return self._projects[uuid]
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def create_project(self, **kwargs):
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"""
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Create a project and keep a references to it in project manager.
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See documentation of Project for arguments
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"""
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project = Project(**kwargs)
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self._projects[project.uuid] = project
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return project
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