Mercurial > hg > TagInTheMiddle

annotate taginthemiddle/model.py @ 16:5f492a6fbdd1

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add note about URL structure
author Jeff Hammel <jhammel@mozilla.com>
date Mon, 24 May 2010 07:28:39 -0700
parents 12344c001831
children c85d42296c06
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1 """
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2 tags have:
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3 - a list of resources they're applied to
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4 - a time they're applied
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5 - for multi-user tags, the author should be passed (fudge for now)
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6 for now just assume auth is on and that anyone authenticated may tag
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7 e.g. a tags file
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8
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9 foo = /bar:1273023556 /fleem/baz:1273023556 etc
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10 cats = /cats:1273023556 /blog/mycat:1273023556
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11
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12 Ideally, the form of tags would be something like a table
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13
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14 Tag | URL | Author | Date [seconds since epoch]
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15 """
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16
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17 import os
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18 import time
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19
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20 class Tags(object):
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21 """file (e.g. .ini) based tagging scheme"""
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22
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23 def __init__(self, path):
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24 """
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25 - path: path to file
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26 """
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27 self.path = path
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28 if not os.path.exists(path):
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29 f = file(path, 'w')
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30 f.close()
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31 self.tags = {}
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32 self.urls = {}
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33 self.times = {}
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34 self.read()
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36 def read(self):
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37 for line in file(self.path).readlines():
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38 line = line.strip()
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39 if not line:
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40 continue
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41 tag, urls = line.split('=', 1) # asserts '=' in line
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42 tag = tag.strip()
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43 urls = urls.strip()
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44 self.tags[tag] = set([urls])
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45 for url in urls:
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46 url, time = url.rsplit(':', 1)
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47 self.urls.setdefault(url, set()).add(tag)
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48 self.times[(tag, url)] = int(time)
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50 def write(self):
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51 f = file(self.path, 'w')
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52 for tag in sorted(self.tags.keys()):
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53 print >> f, '%s = %s' % (tag, ' '.join(['%s:%s' % (url, self.times(tag, url))
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54 for url in self.tags[tag]]))
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55 f.close()
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57 def add(self, tag, url):
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58 if url in self.tags[tag]:
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59 return
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60 self.tags[tag].add(url)
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61 self.urls[url].add(tag)
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62 self.times[(tag, url)] = int(time.time())
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63 self.write()
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65 def remove(self, tag, url):
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66 if url not in self.tags[tag]:
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67 return
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68 self.tags[tag].remove(url)
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69 self.urls[url].remove(tag)
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70 del self.times[(tag, url)]
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71 self.write()