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annotate piecrust/sources/base.py @ 826:7f235e65ef5d

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Allow PageSource to provide a custom assetor
author Ben Artin <ben@artins.org>
date Sun, 01 Jan 2017 18:02:13 -0500
parents 58ebf50235a5
children a12ad254176e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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4b1019bb2533 serve: Giant refactor to change how we handle data when serving pages.
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diff changeset
1 import copy
3
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2 import logging
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3 from werkzeug.utils import cached_property
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4 from piecrust.configuration import ConfigurationError
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5 from piecrust.page import Page
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6 from piecrust.data.assetor import Assetor
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7
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8
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9 REALM_USER = 0
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10 REALM_THEME = 1
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11 REALM_NAMES = {
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12 REALM_USER: 'User',
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13 REALM_THEME: 'Theme'}
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15
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16 MODE_PARSING = 0
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17 MODE_CREATING = 1
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18
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19
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20 logger = logging.getLogger(__name__)
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21
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22
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23 def build_pages(app, factories):
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e7b865f8f335 bake: Enable multiprocess baking.
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24 for f in factories:
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25 yield f.buildPage()
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27
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28 class SourceNotFoundError(Exception):
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29 pass
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31
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32 class InvalidFileSystemEndpointError(Exception):
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33 def __init__(self, source_name, fs_endpoint):
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34 super(InvalidFileSystemEndpointError, self).__init__(
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35 "Invalid file-system endpoint for source '%s': %s" %
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36 (source_name, fs_endpoint))
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37
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38
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39 class PageFactory(object):
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40 """ A class responsible for creating a page.
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41 """
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42 def __init__(self, source, rel_path, metadata):
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43 self.source = source
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44 self.rel_path = rel_path
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45 self.metadata = metadata
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46
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2fec3ee1298f Properly override pages between realms.
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47 @cached_property
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48 def ref_spec(self):
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49 return '%s:%s' % (self.source.name, self.rel_path)
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50
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51 @cached_property
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52 def path(self):
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53 path, _ = self.source.resolveRef(self.rel_path)
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54 return path
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55
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56 def buildPage(self):
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57 repo = self.source.app.env.page_repository
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58 if repo is not None:
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59 cache_key = '%s:%s' % (self.source.name, self.rel_path)
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60 return repo.get(cache_key, self._doBuildPage)
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61 return self._doBuildPage()
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62
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63 def _doBuildPage(self):
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64 logger.debug("Building page: %s" % self.path)
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65 page = Page(self.source, copy.deepcopy(self.metadata), self.rel_path)
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66 return page
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68
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69 class PageSource(object):
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70 """ A source for pages, e.g. a directory with one file per page.
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71 """
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72 def __init__(self, app, name, config):
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73 self.app = app
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74 self.name = name
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75 self.config = config or {}
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76 self.config.setdefault('realm', REALM_USER)
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77 self._factories = None
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78 self._provider_type = None
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79
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80 def __getattr__(self, name):
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81 try:
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82 return self.config[name]
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83 except KeyError:
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84 raise AttributeError()
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85
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86 @property
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87 def is_theme_source(self):
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88 return self.realm == REALM_THEME
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89
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90 @property
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91 def root_dir(self):
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92 if self.is_theme_source:
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93 return self.app.theme_dir
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94 return self.app.root_dir
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95
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96 def getPages(self):
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97 return build_pages(self.app, self.getPageFactories())
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98
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99 def getPage(self, metadata):
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100 factory = self.findPageFactory(metadata, MODE_PARSING)
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101 if factory is None:
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102 return None
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103 return factory.buildPage()
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104
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105 def getPageFactories(self):
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106 if self._factories is None:
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107 self._factories = list(self.buildPageFactories())
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108 return self._factories
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109
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110 def getSupportedRouteParameters(self):
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111 raise NotImplementedError()
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112
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113 def buildPageFactories(self):
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114 raise NotImplementedError()
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115
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116 def buildPageFactory(self, path):
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117 raise NotImplementedError()
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118
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119 def resolveRef(self, ref_path):
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120 """ Returns the full path and source metadata given a source
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121 (relative) path, like a ref-spec.
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122 """
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123 raise NotImplementedError()
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124
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125 def findPageFactory(self, metadata, mode):
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126 raise NotImplementedError()
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127
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128 def buildDataProvider(self, page, override):
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129 if self._provider_type is None:
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130 cls = next((pt for pt in self.app.plugin_loader.getDataProviders()
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131 if pt.PROVIDER_NAME == self.data_type),
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132 None)
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133 if cls is None:
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134 raise ConfigurationError(
f130365568ff internal: Code reorganization to put less stuff in `sources.base`.
Ludovic Chabant <ludovic@chabant.com>
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135 "Unknown data provider type: %s" % self.data_type)
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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136 self._provider_type = cls
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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137
440
32c7c2d219d2 performance: Refactor how data is managed to reduce copying.
Ludovic Chabant <ludovic@chabant.com>
parents: 411
diff changeset
138 return self._provider_type(self, page, override)
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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139
826
7f235e65ef5d Allow PageSource to provide a custom assetor
Ben Artin <ben@artins.org>
parents: 792
diff changeset
140 def buildPageAssetor(self, page, uri):
7f235e65ef5d Allow PageSource to provide a custom assetor
Ben Artin <ben@artins.org>
parents: 792
diff changeset
141 return Assetor(page, uri)
7f235e65ef5d Allow PageSource to provide a custom assetor
Ben Artin <ben@artins.org>
parents: 792
diff changeset
142