Mercurial > piecrust2

annotate piecrust/data/provider.py @ 840:7f3043f9f26f

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internal: Don't check for a page repository, there's always one.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 15 Feb 2017 22:17:13 -0800
parents 69d16e1afb95
children
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1 import time
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2 import collections.abc
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3 from piecrust.configuration import ConfigurationError
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4 from piecrust.data.iterators import PageIterator
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5 from piecrust.generation.taxonomy import Taxonomy
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6 from piecrust.sources.array import ArraySource
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7
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8
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9 def get_data_provider_class(app, provider_type):
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10 if not provider_type:
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11 raise Exception("No data provider type specified.")
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12 for prov in app.plugin_loader.getDataProviders():
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13 if prov.PROVIDER_NAME == provider_type:
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14 return prov
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15 raise ConfigurationError(
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16 "Unknown data provider type: %s" % provider_type)
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17
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18
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19 class DataProvider(object):
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20 debug_render_dynamic = []
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21 debug_render_invoke_dynamic = []
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22
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23 def __init__(self, source, page, override):
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24 if source.app is not page.app:
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25 raise Exception("The given source and page don't belong to "
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26 "the same application.")
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27 self._source = source
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28 self._page = page
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30
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31 class IteratorDataProvider(DataProvider):
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32 PROVIDER_NAME = 'iterator'
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33
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34 debug_render_doc_dynamic = ['_debugRenderDoc']
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35 debug_render_not_empty = True
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36
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37 def __init__(self, source, page, override):
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38 super(IteratorDataProvider, self).__init__(source, page, override)
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39
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40 self._innerIt = None
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41 if isinstance(override, IteratorDataProvider):
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42 # Iterator providers can be chained, like for instance with
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43 # `site.pages` listing both the theme pages and the user site's
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44 # pages.
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45 self._innerIt = override
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46
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47 self._pages = PageIterator(source, current_page=page)
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48 self._pages._iter_event += self._onIteration
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49 self._ctx_set = False
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50
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51 def __len__(self):
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52 return len(self._pages)
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53
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54 def __getitem__(self, key):
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55 return self._pages[key]
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56
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57 def __iter__(self):
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58 yield from iter(self._pages)
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59 if self._innerIt:
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60 yield from self._innerIt
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61
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62 def _onIteration(self):
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63 if not self._ctx_set:
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64 eis = self._page.app.env.exec_info_stack
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65 eis.current_page_info.render_ctx.addUsedSource(self._source.name)
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66 self._ctx_set = True
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67
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68 def _debugRenderDoc(self):
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69 return 'Provides a list of %d items' % len(self)
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72 class BlogDataProvider(DataProvider, collections.abc.Mapping):
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73 PROVIDER_NAME = 'blog'
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74
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75 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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76 archives."""
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77 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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78 DataProvider.debug_render_dynamic)
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79
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80 def __init__(self, source, page, override):
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81 super(BlogDataProvider, self).__init__(source, page, override)
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82 self._yearly = None
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83 self._monthly = None
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84 self._taxonomies = {}
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85 self._ctx_set = False
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86
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87 @property
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88 def posts(self):
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89 return self._posts()
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90
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91 @property
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92 def years(self):
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93 return self._buildYearlyArchive()
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94
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95 @property
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96 def months(self):
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97 return self._buildMonthlyArchive()
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98
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99 def __getitem__(self, name):
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100 if name == 'posts':
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101 return self._posts()
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102 elif name == 'years':
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103 return self._buildYearlyArchive()
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104 elif name == 'months':
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105 return self._buildMonthlyArchive()
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106
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107 if self._source.app.config.get('site/taxonomies/' + name) is not None:
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108 return self._buildTaxonomy(name)
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109
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110 raise KeyError("No such item: %s" % name)
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111
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112 def __iter__(self):
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113 keys = ['posts', 'years', 'months']
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114 keys += list(self._source.app.config.get('site/taxonomies').keys())
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115 return iter(keys)
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116
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117 def __len__(self):
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118 return 3 + len(self._source.app.config.get('site/taxonomies'))
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119
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120 def _debugRenderTaxonomies(self):
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121 return list(self._source.app.config.get('site/taxonomies').keys())
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122
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123 def _posts(self):
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124 it = PageIterator(self._source, current_page=self._page)
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125 it._iter_event += self._onIteration
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126 return it
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127
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128 def _buildYearlyArchive(self):
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129 if self._yearly is not None:
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130 return self._yearly
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131
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132 self._yearly = []
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diff changeset
133 yearly_index = {}
114
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diff changeset
134 for post in self._source.getPages():
3
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135 year = post.datetime.strftime('%Y')
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diff changeset
136
411
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diff changeset
137 posts_this_year = yearly_index.get(year)
3
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138 if posts_this_year is None:
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139 timestamp = time.mktime(
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140 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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141 posts_this_year = BlogArchiveEntry(self._page, year, timestamp)
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142 self._yearly.append(posts_this_year)
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143 yearly_index[year] = posts_this_year
3
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144
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145 posts_this_year._data_source.append(post)
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146 self._yearly = sorted(self._yearly,
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147 key=lambda e: e.timestamp,
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148 reverse=True)
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149 self._onIteration()
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150 return self._yearly
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151
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152 def _buildMonthlyArchive(self):
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153 if self._monthly is not None:
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154 return self._monthly
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155
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156 self._monthly = []
114
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157 for post in self._source.getPages():
3
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158 month = post.datetime.strftime('%B %Y')
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159
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160 posts_this_month = next(
5
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161 filter(lambda m: m.name == month, self._monthly),
3
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162 None)
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163 if posts_this_month is None:
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164 timestamp = time.mktime(
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165 (post.datetime.year, post.datetime.month, 1,
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166 0, 0, 0, 0, 0, -1))
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167 posts_this_month = BlogArchiveEntry(self._page, month, timestamp)
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168 self._monthly.append(posts_this_month)
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169
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170 posts_this_month._data_source.append(post)
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171 self._monthly = sorted(self._monthly,
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172 key=lambda e: e.timestamp,
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173 reverse=True)
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diff changeset
174 self._onIteration()
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175 return self._monthly
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176
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177 def _buildTaxonomy(self, tax_name):
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178 if tax_name in self._taxonomies:
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179 return self._taxonomies[tax_name]
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180
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diff changeset
181 tax_cfg = self._page.app.config.get('site/taxonomies/' + tax_name)
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182 tax = Taxonomy(tax_name, tax_cfg)
319
50da3a045d59 dataprovider: Use the setting name for a taxonomy to match page config values.
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diff changeset
183
3
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184 posts_by_tax_value = {}
114
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diff changeset
185 for post in self._source.getPages():
711
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diff changeset
186 tax_values = post.config.get(tax.setting_name)
7
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diff changeset
187 if tax_values is None:
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diff changeset
188 continue
3
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189 if not isinstance(tax_values, list):
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190 tax_values = [tax_values]
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191 for val in tax_values:
711
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diff changeset
192 posts = posts_by_tax_value.setdefault(val, [])
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diff changeset
193 posts.append(post)
3
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194
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195 entries = []
5
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diff changeset
196 for value, ds in posts_by_tax_value.items():
3
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197 source = ArraySource(self._page.app, ds)
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198 entries.append(BlogTaxonomyEntry(self._page, source, value))
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199 self._taxonomies[tax_name] = sorted(entries, key=lambda k: k.name)
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diff changeset
200
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diff changeset
201 self._onIteration()
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diff changeset
202 return self._taxonomies[tax_name]
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diff changeset
203
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204 def _onIteration(self):
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diff changeset
205 if not self._ctx_set:
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diff changeset
206 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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parents: 440
diff changeset
207 if eis.current_page_info:
703ea5d76f33 serve: Don't crash when looking at the debug info in a stand-alone window.
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parents: 440
diff changeset
208 eis.current_page_info.render_ctx.addUsedSource(self._source)
3
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diff changeset
209 self._ctx_set = True
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diff changeset
210
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diff changeset
211
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diff changeset
212 class BlogArchiveEntry(object):
714
e4dcef2d5640 debug: Show more stuff pertaining to data providers in the debug window.
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diff changeset
213 debug_render = ['name', 'timestamp', 'posts']
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diff changeset
214 debug_render_invoke = ['name', 'timestamp', 'posts']
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215
3
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216 def __init__(self, page, name, timestamp):
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217 self.name = name
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diff changeset
218 self.timestamp = timestamp
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diff changeset
219 self._page = page
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diff changeset
220 self._data_source = []
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diff changeset
221 self._iterator = None
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diff changeset
222
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223 def __str__(self):
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diff changeset
224 return self.name
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diff changeset
225
746
0fdf1e43bf92 data: Make the blog provider give usable data to the year archive routes.
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parents: 729
diff changeset
226 def __int__(self):
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diff changeset
227 return int(self.name)
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diff changeset
228
3
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diff changeset
229 @property
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diff changeset
230 def posts(self):
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diff changeset
231 self._load()
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diff changeset
232 self._iterator.reset()
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diff changeset
233 return self._iterator
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diff changeset
234
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diff changeset
235 def _load(self):
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diff changeset
236 if self._iterator is not None:
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parents:
diff changeset
237 return
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diff changeset
238 source = ArraySource(self._page.app, self._data_source)
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diff changeset
239 self._iterator = PageIterator(source, current_page=self._page)
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diff changeset
240
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diff changeset
241
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diff changeset
242 class BlogTaxonomyEntry(object):
714
e4dcef2d5640 debug: Show more stuff pertaining to data providers in the debug window.
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diff changeset
243 debug_render = ['name', 'post_count', 'posts']
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diff changeset
244 debug_render_invoke = ['name', 'post_count', 'posts']
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diff changeset
245
3
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246 def __init__(self, page, source, property_value):
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diff changeset
247 self._page = page
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diff changeset
248 self._source = source
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diff changeset
249 self._property_value = property_value
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250 self._iterator = None
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diff changeset
251
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252 def __str__(self):
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253 return self._property_value
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diff changeset
254
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diff changeset
255 @property
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diff changeset
256 def name(self):
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diff changeset
257 return self._property_value
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diff changeset
258
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diff changeset
259 @property
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260 def posts(self):
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261 self._load()
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262 self._iterator.reset()
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263 return self._iterator
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264
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265 @property
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266 def post_count(self):
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267 return self._source.page_count
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268
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269 def _load(self):
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270 if self._iterator is not None:
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271 return
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272
729
e35407c60e00 templating: Make blog archives generator expose more templating data.
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273 self._iterator = PageIterator(self._source, current_page=self._page)
3
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274