root / kamaki / cli / history.py @ 54c90711
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1 | 73e0914d | Stavros Sachtouris | #!/usr/bin/env python
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2 | 73e0914d | Stavros Sachtouris | |
3 | 34e4cf61 | Stavros Sachtouris | # Copyright 2012-2013 GRNET S.A. All rights reserved.
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4 | 73e0914d | Stavros Sachtouris | #
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5 | 73e0914d | Stavros Sachtouris | # Redistribution and use in source and binary forms, with or
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6 | 73e0914d | Stavros Sachtouris | # without modification, are permitted provided that the following
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7 | 73e0914d | Stavros Sachtouris | # conditions are met:
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8 | 73e0914d | Stavros Sachtouris | #
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9 | 73e0914d | Stavros Sachtouris | # 1. Redistributions of source code must retain the above
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10 | 73e0914d | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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11 | 73e0914d | Stavros Sachtouris | # disclaimer.
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12 | 73e0914d | Stavros Sachtouris | #
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13 | 73e0914d | Stavros Sachtouris | # 2. Redistributions in binary form must reproduce the above
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14 | 73e0914d | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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15 | 73e0914d | Stavros Sachtouris | # disclaimer in the documentation and/or other materials
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16 | 73e0914d | Stavros Sachtouris | # provided with the distribution.
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17 | 73e0914d | Stavros Sachtouris | #
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18 | 73e0914d | Stavros Sachtouris | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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19 | 73e0914d | Stavros Sachtouris | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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20 | 73e0914d | Stavros Sachtouris | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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21 | 73e0914d | Stavros Sachtouris | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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22 | 73e0914d | Stavros Sachtouris | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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23 | 73e0914d | Stavros Sachtouris | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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24 | 73e0914d | Stavros Sachtouris | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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25 | 73e0914d | Stavros Sachtouris | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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26 | 73e0914d | Stavros Sachtouris | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 | 73e0914d | Stavros Sachtouris | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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28 | 73e0914d | Stavros Sachtouris | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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29 | 73e0914d | Stavros Sachtouris | # POSSIBILITY OF SUCH DAMAGE.
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30 | 73e0914d | Stavros Sachtouris | #
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31 | 73e0914d | Stavros Sachtouris | # The views and conclusions contained in the software and
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32 | 73e0914d | Stavros Sachtouris | # documentation are those of the authors and should not be
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33 | 73e0914d | Stavros Sachtouris | # interpreted as representing official policies, either expressed
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34 | 73e0914d | Stavros Sachtouris | # or implied, of GRNET S.A.
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35 | 73e0914d | Stavros Sachtouris | |
36 | fd5db045 | Stavros Sachtouris | |
37 | 73e0914d | Stavros Sachtouris | class History(object): |
38 | fd5db045 | Stavros Sachtouris | def __init__(self, filepath): |
39 | fd5db045 | Stavros Sachtouris | self.filepath = filepath
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40 | 73e0914d | Stavros Sachtouris | |
41 | fd5db045 | Stavros Sachtouris | @classmethod
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42 | fd5db045 | Stavros Sachtouris | def _match(self, line, match_terms): |
43 | fd5db045 | Stavros Sachtouris | if match_terms is None: |
44 | fd5db045 | Stavros Sachtouris | return True |
45 | fd5db045 | Stavros Sachtouris | for term in match_terms.split(): |
46 | fd5db045 | Stavros Sachtouris | if term not in line: |
47 | fd5db045 | Stavros Sachtouris | return False |
48 | fd5db045 | Stavros Sachtouris | return True |
49 | 73e0914d | Stavros Sachtouris | |
50 | fd5db045 | Stavros Sachtouris | def get(self, match_terms=None, limit=0): |
51 | 98093aac | Stavros Sachtouris | limit = int(limit) or 0 |
52 | 99085b30 | Stavros Sachtouris | with open(self.filepath, 'r') as f: |
53 | 99085b30 | Stavros Sachtouris | result = ['%s. \t%s' % (
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54 | 99085b30 | Stavros Sachtouris | i + 1, line) for i, line in enumerate(f.readlines()) |
55 | 99085b30 | Stavros Sachtouris | if self._match(line, match_terms)] |
56 | 98093aac | Stavros Sachtouris | return result[- limit:]
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57 | 73e0914d | Stavros Sachtouris | |
58 | fd5db045 | Stavros Sachtouris | def add(self, line): |
59 | 98093aac | Stavros Sachtouris | with open(self.filepath, 'a+') as f: |
60 | 98093aac | Stavros Sachtouris | f.write(line + '\n')
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61 | 73e0914d | Stavros Sachtouris | |
62 | fd5db045 | Stavros Sachtouris | def clean(self): |
63 | 98093aac | Stavros Sachtouris | with open(self.filepath, 'w'): |
64 | 98093aac | Stavros Sachtouris | pass
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65 | 75a0ea7d | Stavros Sachtouris | |
66 | 75a0ea7d | Stavros Sachtouris | def retrieve(self, cmd_id): |
67 | 75a0ea7d | Stavros Sachtouris | """
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68 | 519d8639 | Stavros Sachtouris | :param cmd_id: (int) the id of the command to retrieve can be positive
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69 | 519d8639 | Stavros Sachtouris | or negative, zero values are ignored
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70 | 75a0ea7d | Stavros Sachtouris |
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71 | 75a0ea7d | Stavros Sachtouris | :returns: (str) the stored command record without the id
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72 | 75a0ea7d | Stavros Sachtouris | """
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73 | 304c90b5 | Stavros Sachtouris | cmd_id = int(cmd_id)
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74 | 519d8639 | Stavros Sachtouris | if not cmd_id: |
75 | 519d8639 | Stavros Sachtouris | return None |
76 | 75a0ea7d | Stavros Sachtouris | with open(self.filepath) as f: |
77 | 304c90b5 | Stavros Sachtouris | try:
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78 | 34e4cf61 | Stavros Sachtouris | cmd_list = f.readlines()[:-1] # exclude current command |
79 | 34e4cf61 | Stavros Sachtouris | return cmd_list[cmd_id - (1 if cmd_id > 0 else 0)] |
80 | 304c90b5 | Stavros Sachtouris | except IndexError: |
81 | 304c90b5 | Stavros Sachtouris | return None |