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# -*- coding: utf8 -*- |
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''' |
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This module contains a few utility functions. |
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''' |
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import re |
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import logging |
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log = logging.getLogger(__name__) |
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class QueryBuilder: |
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def __init__(self, request, postprocess=False): |
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self.request = request |
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self.postprocess = postprocess |
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self.no_result = False |
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self.mode = self.request.params.get('mode', 'default') |
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self.language = self.request.params.get( |
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'language', |
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self.request.locale_name |
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) |
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self.label = self.request.params.get('label', None) |
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def _build_type(self, query): |
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type = self.request.params.get('type', None) |
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if type in ['concept', 'collection']: |
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query['type'] = type |
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return query |
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def _build_label(self, query): |
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if self.label not in [None, '*', '']: |
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if self.mode == 'dijitFilteringSelect' and '*' in self.label: |
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self.postprocess = True |
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query['label'] = self.label.replace('*', '') |
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else: |
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query['label'] = self.label |
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return query |
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def _build_collection(self, query): |
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coll = self.request.params.get('collection', None) |
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if coll is not None: |
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query['collection'] = {'id': coll, 'depth': 'all'} |
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return query |
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def _build_matches(self, query): |
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match_uri = self.request.params.get('match', None) |
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if match_uri is not None: |
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query['matches'] = {'uri': match_uri} |
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match_type = self.request.params.get('match_type', None) |
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if match_type is not None: |
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query['matches']['type'] = match_type |
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return query |
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def __call__(self): |
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if self.mode == 'dijitFilteringSelect' and self.label == '': |
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self.no_result = True |
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q = {} |
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q = self._build_type(q) |
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q = self._build_label(q) |
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q = self._build_collection(q) |
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q = self._build_matches(q) |
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return q |
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def parse_range_header(range): |
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''' |
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Parse a range header as used by the dojo Json Rest store. |
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:param str range: The content of the range header to be parsed. |
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eg. `items=0-9` |
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:returns: A dict with keys start, finish and number or `False` if the |
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range is invalid. |
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''' |
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match = re.match('^items=([0-9]+)-([0-9]+)$', range) |
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if match: |
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start = int(match.group(1)) |
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finish = int(match.group(2)) |
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if finish < start: |
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finish = start |
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return { |
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'start': start, |
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'finish': finish, |
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'number': finish - start + 1 |
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} |
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else: |
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return False |
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OnroerendErfgoed /
pyramid_skosprovider
