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annotate piecrust/dataproviders/blog.py @ 854:08e02c2a2a1a

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core: Keep refactoring, this time to prepare for generator sources. - Make a few APIs simpler. - Content pipelines create their own jobs, so that generator sources can keep aborting in `getContents`, but rely on their pipeline to generate pages for baking.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 04 Jun 2017 23:34:28 -0700
parents f070a4fc033c
children d231a10d18f9
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rev   line source
853
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
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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.taxonomy import Taxonomy
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6
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7
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8 class BlogDataProvider(DataProvider, collections.abc.Mapping):
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9 PROVIDER_NAME = 'blog'
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10
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11 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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12 archives."""
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13 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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14 DataProvider.debug_render_dynamic)
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15
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16 def __init__(self, source, page):
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17 super().__init__(source, page)
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18 self._yearly = None
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19 self._monthly = None
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20 self._taxonomies = {}
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21 self._ctx_set = False
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22
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23 @property
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24 def posts(self):
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25 return self._posts()
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26
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27 @property
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28 def years(self):
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29 return self._buildYearlyArchive()
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30
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31 @property
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32 def months(self):
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33 return self._buildMonthlyArchive()
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34
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35 def __getitem__(self, name):
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36 if name == 'posts':
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37 return self._posts()
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38 elif name == 'years':
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39 return self._buildYearlyArchive()
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40 elif name == 'months':
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41 return self._buildMonthlyArchive()
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42
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43 if self._source.app.config.get('site/taxonomies/' + name) is not None:
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44 return self._buildTaxonomy(name)
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45
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46 raise KeyError("No such item: %s" % name)
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47
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48 def __iter__(self):
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49 keys = ['posts', 'years', 'months']
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50 keys += list(self._source.app.config.get('site/taxonomies').keys())
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51 return iter(keys)
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52
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53 def __len__(self):
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54 return 3 + len(self._source.app.config.get('site/taxonomies'))
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55
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56 def _debugRenderTaxonomies(self):
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57 return list(self._source.app.config.get('site/taxonomies').keys())
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58
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59 def _posts(self):
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60 it = PageIterator(self._source, current_page=self._page)
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61 it._iter_event += self._onIteration
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62 return it
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63
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64 def _buildYearlyArchive(self):
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65 if self._yearly is not None:
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66 return self._yearly
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67
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68 self._yearly = []
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69 yearly_index = {}
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70 for post in self._source.getPages():
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71 year = post.datetime.strftime('%Y')
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72
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73 posts_this_year = yearly_index.get(year)
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74 if posts_this_year is None:
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75 timestamp = time.mktime(
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76 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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77 posts_this_year = BlogArchiveEntry(self._page, year, timestamp)
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78 self._yearly.append(posts_this_year)
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79 yearly_index[year] = posts_this_year
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80
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81 posts_this_year._data_source.append(post)
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82 self._yearly = sorted(self._yearly,
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83 key=lambda e: e.timestamp,
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84 reverse=True)
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85 self._onIteration()
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86 return self._yearly
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87
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88 def _buildMonthlyArchive(self):
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89 if self._monthly is not None:
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90 return self._monthly
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91
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92 self._monthly = []
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93 for post in self._source.getPages():
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94 month = post.datetime.strftime('%B %Y')
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95
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96 posts_this_month = next(
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97 filter(lambda m: m.name == month, self._monthly),
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98 None)
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99 if posts_this_month is None:
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100 timestamp = time.mktime(
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101 (post.datetime.year, post.datetime.month, 1,
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102 0, 0, 0, 0, 0, -1))
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103 posts_this_month = BlogArchiveEntry(
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104 self._page, month, timestamp)
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105 self._monthly.append(posts_this_month)
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106
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107 posts_this_month._data_source.append(post)
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108 self._monthly = sorted(self._monthly,
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109 key=lambda e: e.timestamp,
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110 reverse=True)
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111 self._onIteration()
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112 return self._monthly
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113
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114 def _buildTaxonomy(self, tax_name):
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115 if tax_name in self._taxonomies:
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116 return self._taxonomies[tax_name]
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117
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118 tax_cfg = self._page.app.config.get('site/taxonomies/' + tax_name)
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119 tax = Taxonomy(tax_name, tax_cfg)
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120
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121 posts_by_tax_value = {}
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122 for post in self._source.getPages():
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123 tax_values = post.config.get(tax.setting_name)
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124 if tax_values is None:
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125 continue
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126 if not isinstance(tax_values, list):
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127 tax_values = [tax_values]
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128 for val in tax_values:
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129 posts = posts_by_tax_value.setdefault(val, [])
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130 posts.append(post)
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131
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132 entries = []
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133 for value, ds in posts_by_tax_value.items():
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134 source = ArraySource(self._page.app, ds)
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135 entries.append(BlogTaxonomyEntry(self._page, source, value))
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136 self._taxonomies[tax_name] = sorted(entries, key=lambda k: k.name)
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137
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138 self._onIteration()
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139 return self._taxonomies[tax_name]
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140
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141 def _onIteration(self):
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142 if not self._ctx_set:
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143 eis = self._page.app.env.exec_info_stack
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144 if eis.current_page_info:
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145 eis.current_page_info.render_ctx.addUsedSource(self._source)
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146 self._ctx_set = True
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147
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148
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149 class BlogArchiveEntry(object):
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150 debug_render = ['name', 'timestamp', 'posts']
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151 debug_render_invoke = ['name', 'timestamp', 'posts']
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152
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153 def __init__(self, page, name, timestamp):
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154 self.name = name
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155 self.timestamp = timestamp
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156 self._page = page
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157 self._data_source = []
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158 self._iterator = None
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159
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160 def __str__(self):
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161 return self.name
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162
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163 def __int__(self):
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164 return int(self.name)
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165
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166 @property
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Ludovic Chabant <ludovic@chabant.com>
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167 def posts(self):
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168 self._load()
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169 self._iterator.reset()
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170 return self._iterator
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171
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172 def _load(self):
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173 if self._iterator is not None:
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Ludovic Chabant <ludovic@chabant.com>
parents:
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174 return
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175 source = ArraySource(self._page.app, self._data_source)
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parents:
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176 self._iterator = PageIterator(source, current_page=self._page)
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177
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178
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179 class BlogTaxonomyEntry(object):
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180 debug_render = ['name', 'post_count', 'posts']
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181 debug_render_invoke = ['name', 'post_count', 'posts']
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182
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183 def __init__(self, page, source, property_value):
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184 self._page = page
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185 self._source = source
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186 self._property_value = property_value
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187 self._iterator = None
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188
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189 def __str__(self):
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190 return self._property_value
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191
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192 @property
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193 def name(self):
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194 return self._property_value
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195
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196 @property
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197 def posts(self):
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198 self._load()
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199 self._iterator.reset()
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200 return self._iterator
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parents:
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201
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202 @property
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Ludovic Chabant <ludovic@chabant.com>
parents:
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203 def post_count(self):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
204 return self._source.page_count
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
205
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Ludovic Chabant <ludovic@chabant.com>
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206 def _load(self):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
207 if self._iterator is not None:
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
208 return
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parents:
diff changeset
209
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
210 self._iterator = PageIterator(self._source, current_page=self._page)
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
211