Onionr/src/onionrblocks/storagecounter.py

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"""
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Onionr - Private P2P Communication
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Keeps track of how much disk space we're using
"""
"""
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This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
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import config, filepaths
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config.reload()
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class StorageCounter:
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def __init__(self):
self.data_file = filepaths.usage_file
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return
def is_full(self)->bool:
"""Returns if the allocated disk space is full (this is Onionr config, not true FS capacity)"""
ret_data = False
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if config.get('allocations.disk', 1073741824) <= (self.get_amount() + 1000):
ret_data = True
return ret_data
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def _update(self, data):
with open(self.data_file, 'w') as data_file:
data_file.write(str(data))
def get_amount(self)->int:
"""Return how much disk space we're using (according to record)"""
ret_data = 0
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try:
with open(self.data_file, 'r') as data_file:
ret_data = int(data_file.read())
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except FileNotFoundError:
pass
except ValueError:
pass # Possibly happens when the file is empty
return ret_data
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def get_percent(self)->int:
"""Return percent (decimal/float) of disk space we're using"""
amount = self.get_amount()
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return round(amount / config.get('allocations.disk', 2000000000), 2)
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def add_bytes(self, amount)->int:
"""Record that we are now using more disk space, unless doing so would exceed configured max"""
new_amount = amount + self.get_amount()
ret_data = new_amount
if new_amount > config.get('allocations.disk', 2000000000):
ret_data = False
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else:
self._update(new_amount)
return ret_data
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def remove_bytes(self, amount)->int:
"""Record that we are now using less disk space"""
new_amount = self.get_amount() - amount
self._update(new_amount)
return new_amount