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annotate piecrust/dataproviders/blog.py @ 857:d231a10d18f9

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refactor: Make the data providers and blog archives source functional. Also, because of a behaviour change in Jinja, the blog archives sources is now offering monthly archives by itself.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 08 Jun 2017 08:49:33 -0700
parents 08e02c2a2a1a
children f4608e2e80ce
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1 import time
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2 import collections.abc
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3 from piecrust.dataproviders.base import DataProvider
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4 from piecrust.dataproviders.pageiterator import PageIterator
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5 from piecrust.sources.list import ListSource
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6 from piecrust.sources.taxonomy import Taxonomy
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7
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8
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9 class BlogDataProvider(DataProvider, collections.abc.Mapping):
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10 PROVIDER_NAME = 'blog'
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11
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12 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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13 archives."""
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14 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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15 DataProvider.debug_render_dynamic)
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16
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17 def __init__(self, source, page):
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18 super().__init__(source, page)
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19 self._posts = None
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20 self._yearly = None
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21 self._monthly = None
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22 self._taxonomies = {}
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23 self._archives_built = False
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24 self._ctx_set = False
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25
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26 def _addSource(self, source):
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27 raise Exception("The blog data provider doesn't support "
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28 "combining multiple sources.")
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29
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30 @property
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31 def posts(self):
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32 self._buildPosts()
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33 return self._posts
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34
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35 @property
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36 def years(self):
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37 self._buildArchives()
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38 return self._yearly
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39
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40 @property
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41 def months(self):
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42 self._buildArchives()
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43 return self._montly
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44
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45 def __getitem__(self, name):
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46 self._buildArchives()
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47 return self._taxonomies[name]
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48
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49 def __getattr__(self, name):
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50 self._buildArchives()
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51 try:
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52 return self._taxonomies[name]
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53 except KeyError:
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54 raise AttributeError("No such taxonomy: %s" % name)
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55
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56 def __iter__(self):
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57 self._buildPosts()
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58 self._buildArchives()
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59 return ['posts', 'years', 'months'] + list(self._taxonomies.keys())
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60
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61 def __len__(self):
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62 self._buildPosts()
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63 self._buildArchives()
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64 return 3 + len(self._taxonomies)
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65
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66 def _debugRenderTaxonomies(self):
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67 return list(self._app.config.get('site/taxonomies').keys())
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68
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69 def _buildPosts(self):
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70 if self._posts is None:
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71 it = PageIterator(self._sources[0], current_page=self._page)
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72 it._iter_event += self._onIteration
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73 self._posts = it
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74
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75 def _buildArchives(self):
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76 if self._archives_built:
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77 return
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78
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79 yearly_index = {}
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80 monthly_index = {}
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81 tax_index = {}
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82
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83 taxonomies = []
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84 tax_names = list(self._app.config.get('site/taxonomies').keys())
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85 for tn in tax_names:
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86 tax_cfg = self._app.config.get('site/taxonomies/' + tn)
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87 taxonomies.append(Taxonomy(tn, tax_cfg))
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88 tax_index[tn] = {}
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89
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90 app = self._app
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91 page = self._page
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92 source = self._sources[0]
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93
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94 for item in source.getAllContents():
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95 post = app.getPage(source, item)
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96
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97 year = post.datetime.strftime('%Y')
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98 month = post.datetime.strftime('%B %Y')
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99
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100 posts_this_year = yearly_index.get(year)
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101 if posts_this_year is None:
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102 timestamp = time.mktime(
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103 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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104 posts_this_year = BlogArchiveEntry(
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105 source, page, year, timestamp)
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106 yearly_index[year] = posts_this_year
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107 posts_this_year._items.append(post.content_item)
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108
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109 posts_this_month = monthly_index.get(month)
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110 if posts_this_month is None:
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111 timestamp = time.mktime(
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112 (post.datetime.year, post.datetime.month, 1,
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113 0, 0, 0, 0, 0, -1))
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114 posts_this_month = BlogArchiveEntry(
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115 source, page, month, timestamp)
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116 monthly_index[month] = posts_this_month
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117 posts_this_month._items.append(post.content_item)
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118
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119 for tax in taxonomies:
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120 post_term = post.config.get(tax.setting_name)
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121 if post_term is None:
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122 continue
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123
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124 posts_this_tax = tax_index[tax.name]
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125 if tax.is_multiple:
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126 for val in post_term:
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127 entry = posts_this_tax.get(val)
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128 if entry is None:
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129 entry = BlogTaxonomyEntry(source, page, val)
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130 posts_this_tax[val] = entry
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131 entry._items.append(post.content_item)
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132 else:
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133 entry = posts_this_tax.get(val)
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134 if entry is None:
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135 entry = BlogTaxonomyEntry(source, page, post_term)
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136 posts_this_tax[val] = entry
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137 entry._items.append(post.content_item)
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138
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139 self._yearly = list(sorted(
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140 yearly_index.values(),
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141 key=lambda e: e.timestamp, reverse=True))
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142 self._monthly = list(sorted(
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143 monthly_index.values(),
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144 key=lambda e: e.timestamp, reverse=True))
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145
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146 self._taxonomies = {}
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147 for tax_name, entries in tax_index.items():
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148 self._taxonomies[tax_name] = list(entries.values())
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149
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150 self._onIteration(None)
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151
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152 self._archives_built = True
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153
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154 def _onIteration(self, it):
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155 if not self._ctx_set:
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156 rcs = self._app.env.render_ctx_stack
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157 if rcs.current_ctx:
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158 rcs.current_ctx.addUsedSource(self._sources[0])
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159 self._ctx_set = True
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160
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161
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162 class BlogArchiveEntry:
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163 debug_render = ['name', 'timestamp', 'posts']
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164 debug_render_invoke = ['name', 'timestamp', 'posts']
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165
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166 def __init__(self, source, page, name, timestamp):
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167 self.name = name
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168 self.timestamp = timestamp
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169 self._source = source
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170 self._page = page
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171 self._items = []
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172 self._iterator = None
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173
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174 def __str__(self):
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175 return self.name
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176
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177 def __int__(self):
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178 return int(self.name)
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179
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180 @property
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181 def posts(self):
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182 self._load()
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183 self._iterator.reset()
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184 return self._iterator
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185
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186 def _load(self):
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187 if self._iterator is not None:
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188 return
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189
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190 src = ListSource(self._source, self._items)
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191 self._iterator = PageIterator(src, current_page=self._page)
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192
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193
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194 class BlogTaxonomyEntry:
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195 debug_render = ['name', 'post_count', 'posts']
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196 debug_render_invoke = ['name', 'post_count', 'posts']
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197
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198 def __init__(self, source, page, term):
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199 self.term = term
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200 self._source = source
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201 self._page = page
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202 self._items = []
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203 self._iterator = None
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204
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205 def __str__(self):
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206 return self.term
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207
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208 @property
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209 def name(self):
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210 return self.term
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211
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212 @property
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213 def posts(self):
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214 self._load()
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215 self._iterator.reset()
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216 return self._iterator
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217
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218 @property
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219 def post_count(self):
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220 return len(self._items)
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221
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222 def _load(self):
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223 if self._iterator is not None:
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224 return
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225
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diff changeset
226 src = ListSource(self._source, self._items)
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diff changeset
227 self._iterator = PageIterator(src, current_page=self._page)
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diff changeset
228