Mercurial > piecrust2

annotate piecrust/routing.py @ 388:3890353d3e5a 2.0.0a10

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setup: Add `requirements.txt` to `MANIFEST.in` so it can be used by the setup.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 15 May 2015 23:41:52 -0700
parents f33712c4cfab
children dc0988d937b3
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1 import re
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2 import os.path
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3 import copy
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4 import logging
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7 logger = logging.getLogger(__name__)
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9
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10 route_re = re.compile(r'%((?P<qual>path):)?(?P<name>\w+)%')
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11 route_esc_re = re.compile(r'\\%((?P<qual>path)\\:)?(?P<name>\w+)\\%')
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12 template_func_re = re.compile(r'^(?P<name>\w+)\((?P<first_arg>\w+)'
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13 r'(?P<other_args>.*)\)\s*$')
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14 template_func_arg_re = re.compile(r',\s*(?P<arg>\w+)')
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15 ugly_url_cleaner = re.compile(r'\.html$')
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17
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18 class IRouteMetadataProvider(object):
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19 def getRouteMetadata(self):
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20 raise NotImplementedError()
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22
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23 class Route(object):
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24 """ Information about a route for a PieCrust application.
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25 Each route defines the "shape" of an URL and how it maps to
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26 sources and taxonomies.
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27 """
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28 def __init__(self, app, cfg):
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29 self.app = app
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30
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31 self.source_name = cfg['source']
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32 self.taxonomy_name = cfg.get('taxonomy')
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33
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34 self.pretty_urls = app.config.get('site/pretty_urls')
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35 self.trailing_slash = app.config.get('site/trailing_slash')
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36 self.pagination_suffix_format = app.config.get(
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37 '__cache/pagination_suffix_format')
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38 self.uri_root = app.config.get('site/root')
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39
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40 uri = cfg['url']
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41 self.uri_pattern = uri.lstrip('/')
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42 self.uri_format = route_re.sub(self._uriFormatRepl, self.uri_pattern)
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43 if app.config.get('site/show_debug_info'):
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44 self.uri_format += '?!debug'
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45
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46 # Get the straight-forward regex for matching this URI pattern.
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47 p = route_esc_re.sub(self._uriPatternRepl,
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48 re.escape(self.uri_pattern)) + '$'
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49 self.uri_re = re.compile(p)
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50
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51 # If the URI pattern has a 'path'-type component, we'll need to match
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52 # the versions for which that component is empty. So for instance if
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53 # we have `/foo/%path:bar%`, we may need to match `/foo` (note the
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54 # lack of a trailing slash). We have to build a special pattern (in
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55 # this case without that trailing slash) to match those situations.
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56 # (maybe there's a better way to do it but I can't think of any
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57 # right now)
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58 uri_pattern_no_path = (
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59 route_re.sub(self._uriNoPathRepl, self.uri_pattern)
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60 .replace('//', '/')
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61 .rstrip('/'))
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62 if uri_pattern_no_path != self.uri_pattern:
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63 p = route_esc_re.sub(self._uriPatternRepl,
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64 re.escape(uri_pattern_no_path)) + '$'
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65 self.uri_re_no_path = re.compile(p)
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66 else:
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67 self.uri_re_no_path = None
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68
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69 self.required_route_metadata = set()
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70 for m in route_re.finditer(self.uri_pattern):
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71 self.required_route_metadata.add(m.group('name'))
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72
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73 self.template_func = None
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74 self.template_func_name = None
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75 self.template_func_args = []
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76 self._createTemplateFunc(cfg.get('func'))
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77
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78 @property
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79 def source(self):
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80 for src in self.app.sources:
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81 if src.name == self.source_name:
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82 return src
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83 raise Exception("Can't find source '%s' for route '%'." % (
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84 self.source_name, self.uri))
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85
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86 @property
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87 def source_realm(self):
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88 return self.source.realm
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89
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90 def matchesMetadata(self, route_metadata):
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91 return self.required_route_metadata.issubset(route_metadata.keys())
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92
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93 def matchUri(self, uri, strict=False):
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94 if not uri.startswith(self.uri_root):
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95 raise Exception("The given URI is not absolute: %s" % uri)
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96 uri = uri[len(self.uri_root):]
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97
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98 if not self.pretty_urls:
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99 uri = ugly_url_cleaner.sub('', uri)
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100 elif self.trailing_slash:
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101 uri = uri.rstrip('/')
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102
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103 route_metadata = None
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104 m = self.uri_re.match(uri)
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105 if m:
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106 route_metadata = m.groupdict()
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107 if self.uri_re_no_path:
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108 m = self.uri_re_no_path.match(uri)
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109 if m:
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110 route_metadata = m.groupdict()
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111 if route_metadata is None:
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112 return None
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113
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114 if not strict:
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115 # When matching URIs, if the URI is a match but is missing some
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116 # metadata, fill those up with empty strings. This can happen if,
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117 # say, a route's pattern is `/foo/%slug%`, and we're matching an
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118 # URL like `/foo`.
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119 matched_keys = set(route_metadata.keys())
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120 missing_keys = self.required_route_metadata - matched_keys
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121 for k in missing_keys:
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122 route_metadata[k] = ''
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123
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124 return route_metadata
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125
369
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126 def getUri(self, route_metadata, *, sub_num=1, provider=None):
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127 route_metadata = copy.deepcopy(route_metadata)
147
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128 if provider:
369
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129 route_metadata.update(provider.getRouteMetadata())
256
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130
3
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131 #TODO: fix this hard-coded shit
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132 for key in ['year', 'month', 'day']:
369
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133 if key in route_metadata and isinstance(route_metadata[key], str):
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134 route_metadata[key] = int(route_metadata[key])
256
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135
369
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136 uri = self.uri_format % route_metadata
256
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137 suffix = None
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138 if sub_num > 1:
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139 # Note that we know the pagination suffix starts with a slash.
262
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140 suffix = self.pagination_suffix_format % {'num': sub_num}
256
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141
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142 if self.pretty_urls:
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143 # Output will be:
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144 # - `subdir/name`
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145 # - `subdir/name/2`
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146 # - `subdir/name.ext`
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147 # - `subdir/name.ext/2`
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148 if suffix:
262
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149 if uri == '':
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150 uri = suffix.lstrip('/')
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151 else:
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152 uri = uri.rstrip('/') + suffix
337
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153 if self.trailing_slash and uri != '':
256
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154 uri = uri.rstrip('/') + '/'
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155 else:
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156 # Output will be:
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157 # - `subdir/name.html`
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158 # - `subdir/name/2.html`
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159 # - `subdir/name.ext`
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160 # - `subdir/name/2.ext`
262
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161 if uri == '':
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162 if suffix:
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163 uri = suffix.lstrip('/') + '.html'
256
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164 else:
262
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165 base_uri, ext = os.path.splitext(uri)
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166 if not ext:
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167 ext = '.html'
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168 if suffix:
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169 uri = base_uri + suffix + ext
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170 else:
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171 uri = base_uri + ext
256
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172
329
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173 uri = self.uri_root + uri
235
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174 return uri
3
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175
334
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176 def slugifyTaxonomyTerm(self, term):
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177 #TODO: add options for transliterating and combining terms.
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178 if isinstance(term, tuple):
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179 return '/'.join(term)
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180 return term
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181
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182 def unslugifyTaxonomyTerm(self, term):
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183 #TODO: same as above.
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184 split_terms = term.split('/')
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185 if len(split_terms) == 1:
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diff changeset
186 return term
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187 return tuple(split_terms)
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188
3
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189 def _uriFormatRepl(self, m):
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190 name = m.group('name')
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191 #TODO: fix this hard-coded shit
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192 if name == 'year':
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193 return '%(year)04d'
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194 if name == 'month':
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195 return '%(month)02d'
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196 if name == 'day':
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197 return '%(day)02d'
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198 return '%(' + name + ')s'
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199
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200 def _uriPatternRepl(self, m):
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201 name = m.group('name')
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202 qualifier = m.group('qual')
334
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diff changeset
203 if qualifier == 'path' or self.taxonomy_name:
173
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diff changeset
204 return r'(?P<%s>[^\?]*)' % name
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diff changeset
205 return r'(?P<%s>[^/\?]+)' % name
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parents: 154
diff changeset
206
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diff changeset
207 def _uriNoPathRepl(self, m):
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diff changeset
208 name = m.group('name')
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diff changeset
209 qualifier = m.group('qual')
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diff changeset
210 if qualifier == 'path':
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diff changeset
211 return ''
3
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212 return r'(?P<%s>[^/\?]+)' % name
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213
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214 def _createTemplateFunc(self, func_def):
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215 if func_def is None:
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216 return
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217
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218 m = template_func_re.match(func_def)
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219 if m is None:
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220 raise Exception("Template function definition for route '%s' "
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221 "has invalid syntax: %s" %
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222 (self.uri_pattern, func_def))
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223
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224 self.template_func_name = m.group('name')
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225 self.template_func_args.append(m.group('first_arg'))
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226 arg_list = m.group('other_args')
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227 if arg_list:
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228 self.template_func_args += template_func_arg_re.findall(arg_list)
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229
334
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diff changeset
230 if self.taxonomy_name:
3
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231 # This will be a taxonomy route function... this means we can
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232 # have a variable number of parameters, but only one parameter
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233 # definition, which is the value.
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234 if len(self.template_func_args) != 1:
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235 raise Exception("Route '%s' is a taxonomy route and must have "
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236 "only one argument, which is the term value." %
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diff changeset
237 self.uri_pattern)
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238
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239 def template_func(*args):
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240 if len(args) == 0:
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diff changeset
241 raise Exception(
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242 "Route function '%s' expected at least one "
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diff changeset
243 "argument." % func_def)
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244
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245 # Term combinations can be passed as an array, or as multiple
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246 # arguments.
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247 values = args
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248 if len(args) == 1 and isinstance(args[0], list):
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249 values = args[0]
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250
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251 # We need to register this use of a taxonomy term.
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diff changeset
252 if len(values) == 1:
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253 registered_values = values[0]
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254 else:
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255 registered_values = tuple(values)
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diff changeset
256 eis = self.app.env.exec_info_stack
338
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257 cpi = eis.current_page_info.render_ctx.current_pass_info
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258 if cpi:
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259 cpi.used_taxonomy_terms.add(
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260 (self.source_name, self.taxonomy_name,
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261 registered_values))
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262
334
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263 str_values = self.slugifyTaxonomyTerm(registered_values)
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264 term_name = self.template_func_args[0]
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265 metadata = {term_name: str_values}
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266
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267 return self.getUri(metadata)
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268
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269 else:
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270 # Normal route function.
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271 def template_func(*args):
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272 if len(args) != len(self.template_func_args):
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273 raise Exception(
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274 "Route function '%s' expected %d arguments, "
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275 "got %d." %
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276 (func_def, len(self.template_func_args),
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277 len(args)))
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278 metadata = {}
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279 for arg_name, arg_val in zip(self.template_func_args, args):
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280 metadata[arg_name] = arg_val
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281 return self.getUri(metadata)
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282
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283 self.template_func = template_func
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284
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285
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286 class CompositeRouteFunction(object):
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287 def __init__(self):
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288 self._funcs = []
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289 self._arg_names = None
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290
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291 def addFunc(self, route):
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292 if self._arg_names is None:
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293 self._arg_names = sorted(route.template_func_args)
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294
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295 if sorted(route.template_func_args) != self._arg_names:
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296 raise Exception("Cannot merge route function with arguments '%s' "
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297 "with route function with arguments '%s'." %
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298 (route.template_func_args, self._arg_names))
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299 self._funcs.append((route, route.template_func))
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300
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301 def __call__(self, *args, **kwargs):
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302 if len(self._funcs) == 1 or len(args) == len(self._arg_names):
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303 f = self._funcs[0][1]
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304 return f(*args, **kwargs)
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305
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306 if len(args) == len(self._arg_names) + 1:
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307 f_args = args[:-1]
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308 for r, f in self._funcs:
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309 if r.source_name == args[-1]:
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310 return f(f_args, **kwargs)
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311 raise Exception("No such source: %s" % args[-1])
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312
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313 raise Exception("Incorrect number of arguments for route function. "
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314 "Expected '%s', got '%s'" % (self._arg_names, args))
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315