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annotate piecrust/sources/base.py @ 866:d9059257743c

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refactor: Make the linker work again.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 12 Jun 2017 22:10:50 -0700
parents fddaf43424e2
children 504ddb370df8
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rev   line source
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1 import logging
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2 import collections
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3 from werkzeug.utils import cached_property
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5
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6 # Source realms, to differentiate sources in the site itself ('User')
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7 # and sources in the site's theme ('Theme').
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8 REALM_USER = 0
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9 REALM_THEME = 1
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10 REALM_NAMES = {
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11 REALM_USER: 'User',
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12 REALM_THEME: 'Theme'}
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14
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15 # Types of relationships a content source can be asked for.
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16 REL_LOGICAL_PARENT_ITEM = 1
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17 REL_LOGICAl_CHILD_GROUP = 2
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18 REL_ASSETS = 10
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21 logger = logging.getLogger(__name__)
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23
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24 class SourceNotFoundError(Exception):
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25 pass
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27
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28 class InsufficientRouteParameters(Exception):
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29 pass
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32 class AbortedSourceUseError(Exception):
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33 pass
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35
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36 class GeneratedContentException(Exception):
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37 pass
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39
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40 CONTENT_TYPE_PAGE = 0
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41 CONTENT_TYPE_ASSET = 1
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42
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43
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44 class ContentItem:
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45 """ Describes a piece of content.
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46
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47 Some known metadata that PieCrust will use include:
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48 - `date`: A `datetime.date` object that will set the date of the page.
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49 - `datetime`: A `datetime.datetime` object that will set the date and
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50 time of the page.
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51 - `route_params`: A dictionary of route parameters to generate the
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52 URL to the content.
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53 - `config`: A dictionary of configuration settings to merge into the
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54 settings found in the content itself.
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55 """
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56 def __init__(self, spec, metadata):
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57 self.spec = spec
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58 self.metadata = metadata
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59
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60 @property
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61 def is_group(self):
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62 return False
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64
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65 class ContentGroup:
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66 """ Describes a group of `ContentItem`s.
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67 """
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68 def __init__(self, spec, metadata):
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69 self.spec = spec
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70 self.metadata = metadata
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71
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72 @property
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73 def is_group(self):
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74 return True
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75
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76
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77 class ContentSource:
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78 """ A source for content.
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79 """
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80 DEFAULT_PIPELINE_NAME = None
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81
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82 def __init__(self, app, name, config):
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83 self.app = app
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84 self.name = name
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85 self.config = config or {}
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87 @property
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88 def is_theme_source(self):
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89 return self.config['realm'] == REALM_THEME
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90
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91 @cached_property
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92 def route(self):
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93 return self.app.getSourceRoute(self.name)
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94
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95 def openItem(self, item, mode='r', **kwargs):
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96 raise NotImplementedError()
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97
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98 def getItemMtime(self, item):
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99 raise NotImplementedError()
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371a6c879ab9 When possible, try and batch-load pages so we only lock once.
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100
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101 def getAllContents(self):
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102 stack = collections.deque()
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103 stack.append(None)
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104 while len(stack) > 0:
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105 cur = stack.popleft()
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106 try:
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107 contents = self.getContents(cur)
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108 except GeneratedContentException:
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109 continue
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110 if contents is not None:
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111 for c in contents:
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112 if c.is_group:
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113 stack.append(c)
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114 else:
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115 yield c
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116
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117 def getContents(self, group):
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118 raise NotImplementedError("'%s' doesn't implement 'getContents'." %
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119 self.__class__)
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120
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121 def getParentGroup(self, item):
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122 raise NotImplementedError()
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123
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124 def getRelatedContents(self, item, relationship):
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125 raise NotImplementedError()
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126
866
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Ludovic Chabant <ludovic@chabant.com>
parents: 862
diff changeset
127 def findGroup(self, rel_spec):
d9059257743c refactor: Make the linker work again.
Ludovic Chabant <ludovic@chabant.com>
parents: 862
diff changeset
128 raise NotImplementedError()
d9059257743c refactor: Make the linker work again.
Ludovic Chabant <ludovic@chabant.com>
parents: 862
diff changeset
129
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
130 def findContent(self, route_params):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
131 raise NotImplementedError()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
132
792
58ebf50235a5 routing: Simplify how routes are defined.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
133 def getSupportedRouteParameters(self):
58ebf50235a5 routing: Simplify how routes are defined.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
134 raise NotImplementedError()
58ebf50235a5 routing: Simplify how routes are defined.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
135
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
136 def prepareRenderContext(self, ctx):
824
e01473c3ea7e Allow page source to post-process page config at the end of page loading
Ben Artin <ben@artins.org>
parents: 792
diff changeset
137 pass
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
138
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
139 def onRouteFunctionUsed(self, route_params):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
140 pass
826
7f235e65ef5d Allow PageSource to provide a custom assetor
Ben Artin <ben@artins.org>
parents: 792
diff changeset
141
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
142 def describe(self):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
143 return None
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
144