root / kamaki / cli / history.py @ 5e383dd4
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#!/usr/bin/env python
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# Copyright 2012-2014 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import codecs |
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class History(object): |
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def __init__(self, filepath, token=None): |
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self.filepath = filepath
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self.token = token
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self._limit = 0 |
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self.counter = 0 |
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def __getitem__(self, cmd_ids): |
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with codecs.open(self.filepath, mode='r', encoding='utf-8') as f: |
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try:
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cmd_list = f.readlines()[1:]
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return cmd_list[cmd_ids]
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except IndexError: |
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return None |
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@property
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def limit(self): |
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return self._limit |
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@limit.setter
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def limit(self, new_limit): |
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new_limit = int(new_limit)
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if new_limit < 0: |
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raise ValueError('Invalid history limit (%s)' % new_limit) |
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old_limit, self._limit = self._limit, new_limit |
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if self._limit and self._limit < old_limit: |
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with codecs.open(self.filepath, mode='r', encoding='utf-8') as f: |
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lines = f.readlines() |
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old_len = len(lines[1:]) |
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if old_len > new_limit:
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self.counter += old_len - new_limit
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f.write('%s\n' % self.counter) |
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f.write(''.join(lines[(self.counter + 1):])) |
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f.flush() |
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@classmethod
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def _match(self, line, match_terms): |
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if match_terms:
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return all(term in line for term in match_terms.split()) |
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return True |
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def get(self, match_terms=None, limit=0): |
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"""DEPRECATED since 0.14"""
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limit = int(limit or 0) |
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r = ['%s.\t%s' % (i + 1, line) for i, line in enumerate(self[:]) if ( |
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self._match(line, match_terms))]
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return r[- limit:]
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def add(self, line): |
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line = line.replace(self.token, '...') if self.token else line |
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with codecs.open(self.filepath, mode='a+', encoding='utf-8') as f: |
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f.write(line + '\n')
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f.flush() |
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self.limit = self.limit |
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def empty(self): |
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with open(self.filepath, 'w') as f: |
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f.write('0\n')
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f.flush() |
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self.counter = 0 |
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def clean(self): |
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"""DEPRECATED since version 0.14"""
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return self.empty() |
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def retrieve(self, cmd_id): |
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if not cmd_id: |
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return None |
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cmd_id = int(cmd_id)
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return self[cmd_id - (1 if cmd_id > 0 else 0)] |