Mercurial > hg > bitsyblog

annotate bitsyblog/blog.py @ 106:c7495fb71045

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author Jeff Hammel <k0scist@gmail.com>
date Thu, 21 Apr 2016 15:17:39 -0700
parents e5a23f5ea14e
children 6e7544e256b6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
106
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1 """
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2 blog models
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3 """
0
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4
106
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5 # imports
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6 import datetime
0
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7 import os
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8 import sys
0
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9 import utils
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10 from cStringIO import StringIO
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11 from glob import glob
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12 from pkg_resources import iter_entry_points
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0
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15 class BlogEntry(object):
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16 """interface class for a blog entry"""
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17
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18 def __init__(self, date, body, privacy, user, modified=None):
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19 self.date = date
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20 self.body = body
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21 self.privacy = privacy
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22 self._modified = modified
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23 if user is not None:
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24 self.user = user
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25
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26 def title(self, characters=80):
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27
0
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28 if '\n' in self.body:
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29 lines = [i.strip() for i in self.body[:characters].split('\n')]
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30 if len(lines[0]) > characters:
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31 retval = self.snippet(charachters)
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32 elif len(lines) > 1 and not lines[1]:
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33 retval = lines[0]
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34 else:
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35 retval = self.snippet(characters)
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36 else:
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37 retval = self.snippet(characters)
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38 return retval.decode('utf-8')
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39
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40 def snippet(self, characters=80):
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41 if characters:
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42 if len(self.body) > characters:
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43
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44 text = ' '.join(self.body[:characters].split()[:-1])
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45 if '\n' in text:
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46 lines = [ i.strip() for i in text.split('\n') ]
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47 if '' in lines:
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48 return '\n'.join(lines[:lines.index('')])
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49
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50 if text:
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51 return '%s ...' % text
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52 else:
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53 return self.body
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54 return ''
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56 def datestamp(self):
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57 return utils.datestamp(self.date)
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58
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59 def modified(self):
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60 """returns the last modification date"""
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61 return self._modified or self.datestamp()
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63
0
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64 class Blog(object):
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65 """abstract class for a users' blog"""
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66
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67 def __call__(self, user, permissions=('public',), number=None):
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68 return self.blog(user, permissions, number=number)
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70 def latest(self, users, number):
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71 """return the lastest entries"""
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72 blog = []
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73 for user in users:
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74 blog.extend(self.blog(user, ('public',), number))
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75 blog.sort(key=lambda entry: entry.date, reverse=True)
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76 return blog[:number]
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77
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78 ### interfaces for subclasses
0
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80 def blog(self, user, permissions, number=None):
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81 """
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82 return the user's blog sorted in reverse date order
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83 if number is None, the entire blog is returned
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84 """
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85
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86 def entry(self, user, datestamp, permissions):
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87 """
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88 return a single blog entry with the given datestamp:
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89 'YYYYMMDDHHMMSS'
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90 """
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91
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92 def entries(self, user, permissions, year=None, month=None, day=None):
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93 """return entries by date"""
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94
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95
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96 def post(self, user, date, text, privacy):
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97 """post a new blog entry"""
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98 return BlogEntry(date, text, privacy, user)
0
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99
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100 def delete(self, user, datestamp):
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101 """remove a blog entry"""
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102
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103
0
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104 class FileBlog(Blog):
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105 """a blog that lives on the filesystem"""
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106
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107 def __init__(self, directory):
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108 self.directory = directory
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109
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110 def location(self, user, permission, *path):
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111 """returns which directory files are in based on permission"""
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112 return os.path.join(self.directory, user, 'entries', permission, *path)
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113
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114 def body(self, user, datestamp, permission):
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115 return file(self.location(user, permission, datestamp)).read()
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116
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117 def get_entry(self, user, datestamp, permission):
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118 modified = datetime.datetime.fromtimestamp(os.path.getmtime(self.location(user, permission, datestamp)))
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119 try:
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120 return BlogEntry(utils.date(datestamp),
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121 self.body(user, datestamp, permission),
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122 permission,
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123 user,
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124 modified=modified)
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125 except Exception:
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126 sys.stderr.write("Error getting blog entry for datestamp: '{0}'\n".format(datestamp))
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127 raise
0
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128
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129 ### interfaces from Blog
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130
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131 def blog(self, user, permissions, number=None):
0
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132 entries = []
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133 for permission in permissions:
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134 entries.extend([(entry, permission)
0
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135 for entry in os.listdir(self.location(user, permission)) ])
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136 entries.sort(key=lambda x: x[0], reverse=True)
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137
0
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138 if number is not None:
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139 entries = entries[:number]
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140
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141 return [ self.get_entry(user, x[0], x[1]) for x in entries ]
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142
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143 def entry(self, user, datestamp, permissions):
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144 for permission in permissions:
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145 filename = self.location(user, permission, datestamp)
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146 if os.path.exists(filename):
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147 return self.get_entry(user, datestamp, permission)
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148
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149 def entries(self, user, permissions, year=None, month=None, day=None):
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150
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151 # build a file glob expression
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152 dateargs = [ year, month, day, None ]
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153 glob_expr = ''
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154 for index in range(len(dateargs)):
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155 value = dateargs[index]
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156 if value is None:
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157 break
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158 length = len(utils.timeformat[index])
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159 glob_expr += '%0*d' % (length, int(value))
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160 while index < len(utils.timeformat):
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161 glob_expr += '[0-9]' * len(utils.timeformat[index])
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162 index += 1
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163
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164 # get the blog entries
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165 entries = []
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166 for permission in permissions:
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167 entries.extend([(os.path.split(entry)[-1], permission)
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168 for entry in glob(os.path.join(self.location(user, permission), glob_expr))])
0
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169 entries.sort(key=lambda x: x[0], reverse=True)
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170 return [ self.get_entry(user, x[0], x[1]) for x in entries ]
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171
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172 def post(self, user, datestamp, body, privacy):
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173 blog = file(self.location(user, privacy, datestamp), 'w')
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174 print >> blog, body
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175 return Blog.post(self, user, datestamp, body, privacy)
0
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176
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177 def delete(self, user, datestamp):
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178 for permission in 'public', 'secret', 'private':
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179 path = self.location(user, permission, datestamp)
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180 if os.path.exists(path):
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181 os.remove(path)