Mercurial > piecrust2

annotate piecrust/data/provider.py @ 828:bca06fc064c0

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Use assetor provided by page source when paginating
author Ben Artin <ben@artins.org>
date Sun, 01 Jan 2017 19:32:19 -0500
parents 37bd88f88bab
children 69d16e1afb95
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1 import time
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2 import collections.abc
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3 from piecrust.data.iterators import PageIterator
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4 from piecrust.generation.taxonomy import Taxonomy
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5 from piecrust.sources.array import ArraySource
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7
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8 class DataProvider(object):
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9 debug_render_dynamic = []
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10 debug_render_invoke_dynamic = []
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11
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12 def __init__(self, source, page, override):
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13 if source.app is not page.app:
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14 raise Exception("The given source and page don't belong to "
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15 "the same application.")
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16 self._source = source
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17 self._page = page
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19
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20 class IteratorDataProvider(DataProvider):
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21 PROVIDER_NAME = 'iterator'
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22
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23 debug_render_doc_dynamic = ['_debugRenderDoc']
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24 debug_render_not_empty = True
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25
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26 def __init__(self, source, page, override):
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27 super(IteratorDataProvider, self).__init__(source, page, override)
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29 self._innerIt = None
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30 if isinstance(override, IteratorDataProvider):
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31 # Iterator providers can be chained, like for instance with
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32 # `site.pages` listing both the theme pages and the user site's
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33 # pages.
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34 self._innerIt = override
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35
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36 self._pages = PageIterator(source, current_page=page)
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37 self._pages._iter_event += self._onIteration
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38 self._ctx_set = False
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39
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40 def __len__(self):
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41 return len(self._pages)
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42
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43 def __getitem__(self, key):
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44 return self._pages[key]
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45
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46 def __iter__(self):
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47 yield from iter(self._pages)
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48 if self._innerIt:
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49 yield from self._innerIt
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51 def _onIteration(self):
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52 if not self._ctx_set:
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53 eis = self._page.app.env.exec_info_stack
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54 eis.current_page_info.render_ctx.addUsedSource(self._source.name)
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55 self._ctx_set = True
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56
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57 def _debugRenderDoc(self):
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58 return 'Provides a list of %d items' % len(self)
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61 class BlogDataProvider(DataProvider, collections.abc.Mapping):
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62 PROVIDER_NAME = 'blog'
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64 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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65 archives."""
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66 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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67 DataProvider.debug_render_dynamic)
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69 def __init__(self, source, page, override):
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70 super(BlogDataProvider, self).__init__(source, page, override)
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71 self._yearly = None
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72 self._monthly = None
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73 self._taxonomies = {}
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74 self._ctx_set = False
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75
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76 @property
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77 def posts(self):
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78 return self._posts()
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79
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80 @property
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81 def years(self):
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82 return self._buildYearlyArchive()
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83
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84 @property
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85 def months(self):
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86 return self._buildMonthlyArchive()
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87
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88 def __getitem__(self, name):
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89 if name == 'posts':
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90 return self._posts()
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91 elif name == 'years':
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92 return self._buildYearlyArchive()
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93 elif name == 'months':
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94 return self._buildMonthlyArchive()
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95
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96 if self._source.app.config.get('site/taxonomies/' + name) is not None:
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97 return self._buildTaxonomy(name)
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98
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99 raise KeyError("No such item: %s" % name)
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100
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101 def __iter__(self):
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102 keys = ['posts', 'years', 'months']
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103 keys += list(self._source.app.config.get('site/taxonomies').keys())
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104 return iter(keys)
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105
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106 def __len__(self):
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107 return 3 + len(self._source.app.config.get('site/taxonomies'))
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108
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109 def _debugRenderTaxonomies(self):
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110 return list(self._source.app.config.get('site/taxonomies').keys())
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111
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112 def _posts(self):
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113 it = PageIterator(self._source, current_page=self._page)
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114 it._iter_event += self._onIteration
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115 return it
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116
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117 def _buildYearlyArchive(self):
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118 if self._yearly is not None:
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119 return self._yearly
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120
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121 self._yearly = []
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122 yearly_index = {}
114
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123 for post in self._source.getPages():
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124 year = post.datetime.strftime('%Y')
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125
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126 posts_this_year = yearly_index.get(year)
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127 if posts_this_year is None:
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128 timestamp = time.mktime(
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129 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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130 posts_this_year = BlogArchiveEntry(self._page, year, timestamp)
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131 self._yearly.append(posts_this_year)
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132 yearly_index[year] = posts_this_year
3
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133
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134 posts_this_year._data_source.append(post)
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135 self._yearly = sorted(self._yearly,
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136 key=lambda e: e.timestamp,
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137 reverse=True)
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138 self._onIteration()
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139 return self._yearly
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140
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141 def _buildMonthlyArchive(self):
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142 if self._monthly is not None:
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143 return self._monthly
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144
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145 self._monthly = []
114
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146 for post in self._source.getPages():
3
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147 month = post.datetime.strftime('%B %Y')
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148
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149 posts_this_month = next(
5
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150 filter(lambda m: m.name == month, self._monthly),
3
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151 None)
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152 if posts_this_month is None:
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153 timestamp = time.mktime(
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154 (post.datetime.year, post.datetime.month, 1,
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155 0, 0, 0, 0, 0, -1))
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156 posts_this_month = BlogArchiveEntry(self._page, month, timestamp)
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157 self._monthly.append(posts_this_month)
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158
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159 posts_this_month._data_source.append(post)
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160 self._monthly = sorted(self._monthly,
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161 key=lambda e: e.timestamp,
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162 reverse=True)
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163 self._onIteration()
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164 return self._monthly
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165
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166 def _buildTaxonomy(self, tax_name):
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167 if tax_name in self._taxonomies:
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168 return self._taxonomies[tax_name]
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169
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170 tax_cfg = self._page.app.config.get('site/taxonomies/' + tax_name)
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171 tax = Taxonomy(tax_name, tax_cfg)
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172
3
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173 posts_by_tax_value = {}
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174 for post in self._source.getPages():
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175 tax_values = post.config.get(tax.setting_name)
7
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176 if tax_values is None:
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diff changeset
177 continue
3
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178 if not isinstance(tax_values, list):
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179 tax_values = [tax_values]
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180 for val in tax_values:
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181 posts = posts_by_tax_value.setdefault(val, [])
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diff changeset
182 posts.append(post)
3
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183
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184 entries = []
5
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185 for value, ds in posts_by_tax_value.items():
3
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186 source = ArraySource(self._page.app, ds)
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187 entries.append(BlogTaxonomyEntry(self._page, source, value))
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188 self._taxonomies[tax_name] = sorted(entries, key=lambda k: k.name)
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189
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190 self._onIteration()
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191 return self._taxonomies[tax_name]
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192
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193 def _onIteration(self):
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194 if not self._ctx_set:
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diff changeset
195 eis = self._page.app.env.exec_info_stack
557
703ea5d76f33 serve: Don't crash when looking at the debug info in a stand-alone window.
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diff changeset
196 if eis.current_page_info:
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diff changeset
197 eis.current_page_info.render_ctx.addUsedSource(self._source)
3
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198 self._ctx_set = True
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199
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200
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201 class BlogArchiveEntry(object):
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202 debug_render = ['name', 'timestamp', 'posts']
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203 debug_render_invoke = ['name', 'timestamp', 'posts']
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204
3
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205 def __init__(self, page, name, timestamp):
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206 self.name = name
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207 self.timestamp = timestamp
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208 self._page = page
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209 self._data_source = []
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210 self._iterator = None
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211
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212 def __str__(self):
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213 return self.name
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214
746
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diff changeset
215 def __int__(self):
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diff changeset
216 return int(self.name)
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diff changeset
217
3
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diff changeset
218 @property
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219 def posts(self):
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220 self._load()
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diff changeset
221 self._iterator.reset()
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222 return self._iterator
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223
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224 def _load(self):
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diff changeset
225 if self._iterator is not None:
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226 return
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227 source = ArraySource(self._page.app, self._data_source)
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228 self._iterator = PageIterator(source, current_page=self._page)
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229
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230
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231 class BlogTaxonomyEntry(object):
714
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232 debug_render = ['name', 'post_count', 'posts']
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233 debug_render_invoke = ['name', 'post_count', 'posts']
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234
3
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235 def __init__(self, page, source, property_value):
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diff changeset
236 self._page = page
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237 self._source = source
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238 self._property_value = property_value
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239 self._iterator = None
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240
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241 def __str__(self):
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242 return self._property_value
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243
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244 @property
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245 def name(self):
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246 return self._property_value
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247
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248 @property
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249 def posts(self):
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250 self._load()
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251 self._iterator.reset()
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252 return self._iterator
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253
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254 @property
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255 def post_count(self):
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diff changeset
256 return self._source.page_count
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257
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258 def _load(self):
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diff changeset
259 if self._iterator is not None:
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diff changeset
260 return
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diff changeset
261
729
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diff changeset
262 self._iterator = PageIterator(self._source, current_page=self._page)
3
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263