generalize filter-kind parameter for sanatizers

Now behaves the same for tag_analyzer_by_language and
clean_housenumbers. Adds tests.

nominatim/tokenizer/sanitizers/clean_housenumbers.py

@@ -5,19 +5,24 @@
 # Copyright (C) 2022 by the Nominatim developer community.
 # For a full list of authors see the git log.
 """
-Sanitizer that cleans and normalizes housenumbers.
+Sanitizer that cleans and normalizes house numbers.
 
 Arguments:
     delimiters: Define the set of characters to be used for
-                splitting a list of housenumbers into parts. (default: ',;')
+                splitting a list of house numbers into parts. (default: ',;')
+    filter-kind: Define the address tags that are considered to be a
+                 house number. Either takes a single string or a list of strings,
+                 where each string is a regular expression. An address item
+                 is considered a house number if the 'kind' fully matches any
+                 of the given regular expressions. (default: 'housenumber')
 
 """
-from nominatim.tokenizer.sanitizers.helpers import create_split_regex
+from nominatim.tokenizer.sanitizers.helpers import create_split_regex, create_kind_filter
 
 class _HousenumberSanitizer:
 
     def __init__(self, config):
-        self.kinds = config.get('filter-kind', ('housenumber', ))
+        self.filter_kind = create_kind_filter(config, 'housenumber')
         self.split_regexp = create_split_regex(config)
 
 
@@ -27,7 +32,7 @@ class _HousenumberSanitizer:
 
         new_address = []
         for item in obj.address:
-            if item.kind in self.kinds:
+            if self.filter_kind(item):
                 new_address.extend(item.clone(kind='housenumber', name=n) for n in self.sanitize(item.name))
             else:
                 # Don't touch other address items.

nominatim/tokenizer/sanitizers/helpers.py

@@ -27,3 +27,26 @@ def create_split_regex(config, default=',;'):
         raise UsageError("Empty 'delimiter' parameter not allowed for sanitizer.")
 
     return re.compile('\\s*[{}]+\\s*'.format(''.join('\\' + d for d in delimiter_set)))
+
+
+def create_kind_filter(config, default=None):
+    """ Create a filter function for the name kind from the 'filter-kind'
+        config parameter. The filter functions takes a name item and returns
+        True when the item passes the filter.
+
+        If the parameter is empty, the filter lets all items pass. If the
+        paramter is a string, it is interpreted as a single regular expression
+        that must match the full kind string. If the parameter is a list then
+        any of the regular expressions in the list must match to pass.
+    """
+    filters = config.get('filter-kind', default)
+
+    if not filters:
+        return lambda _: True
+
+    if isinstance(filters, str):
+        regex = re.compile(filters)
+        return lambda name: regex.fullmatch(name.kind)
+
+    regexes = [re.compile(regex) for regex in filters]
+    return lambda name: any(regex.fullmatch(name.kind) for regex in regexes)

nominatim/tokenizer/sanitizers/tag_analyzer_by_language.py

@@ -33,17 +33,14 @@ Arguments:
 import re
 
 from nominatim.tools import country_info
+from nominatim.tokenizer.sanitizers.helpers import create_kind_filter
 
 class _AnalyzerByLanguage:
     """ Processor for tagging the language of names in a place.
     """
 
     def __init__(self, config):
-        if 'filter-kind' in config:
+        self.filter_kind = create_kind_filter(config)
-            self.regexes = [re.compile(regex) for regex in config['filter-kind']]
-        else:
-            self.regexes = None
-
         self.replace = config.get('mode', 'replace') != 'append'
         self.whitelist = config.get('whitelist')
 
@@ -63,13 +60,6 @@ class _AnalyzerByLanguage:
                         self.deflangs[ccode] = clangs
 
 
-    def _kind_matches(self, kind):
-        if self.regexes is None:
-            return True
-
-        return any(regex.fullmatch(kind) for regex in self.regexes)
-
-
     def _suffix_matches(self, suffix):
         if self.whitelist is None:
             return len(suffix) in (2, 3) and suffix.islower()
@@ -84,7 +74,7 @@ class _AnalyzerByLanguage:
         more_names = []
 
         for name in (n for n in obj.names
-                     if not n.has_attr('analyzer') and self._kind_matches(n.kind)):
+                     if not n.has_attr('analyzer') and self.filter_kind(n)):
             if name.suffix:
                 langs = [name.suffix] if self._suffix_matches(name.suffix) else None
             else:

test/python/tokenizer/sanitizers/test_helpers.py

@@ -10,6 +10,7 @@ Tests for sanitizer helper functions.
 import pytest
 
 from nominatim.errors import UsageError
+from nominatim.tokenizer.place_sanitizer import PlaceName
 import nominatim.tokenizer.sanitizers.helpers as helpers
 
 @pytest.mark.parametrize('inp', ('fg34', 'f\\f', 'morning [glory]', '56.78'))
@@ -41,3 +42,38 @@ def test_create_split_regex_custom(delimiter):
 def test_create_split_regex_empty_delimiter():
     with pytest.raises(UsageError):
         regex = helpers.create_split_regex({'delimiters': ''})
+
+
+@pytest.mark.parametrize('inp', ('name', 'name:de', 'na\\me', '.*'))
+def test_create_kind_filter_no_params(inp):
+    filt = helpers.create_kind_filter({})
+
+    assert filt(PlaceName('something', inp, ''))
+
+
+@pytest.mark.parametrize('kind', ('de', 'name:de', 'ende'))
+def test_create_kind_filter_custom_regex_positive(kind):
+    filt = helpers.create_kind_filter({'filter-kind': '.*de'})
+
+    assert filt(PlaceName('something', kind, ''))
+
+
+@pytest.mark.parametrize('kind', ('de ', '123', '', 'bedece'))
+def test_create_kind_filter_custom_regex_negative(kind):
+    filt = helpers.create_kind_filter({'filter-kind': '.*de'})
+
+    assert not filt(PlaceName('something', kind, ''))
+
+
+@pytest.mark.parametrize('kind', ('name', 'fr', 'name:fr', 'frfr', '34'))
+def test_create_kind_filter_many_positive(kind):
+    filt = helpers.create_kind_filter({'filter-kind': ['.*fr', 'name', r'\d+']})
+
+    assert filt(PlaceName('something', kind, ''))
+
+
+@pytest.mark.parametrize('kind', ('name:de', 'fridge', 'a34', '.*', '\\'))
+def test_create_kind_filter_many_negative(kind):
+    filt = helpers.create_kind_filter({'filter-kind': ['.*fr', 'name', r'\d+']})
+
+    assert not filt(PlaceName('something', kind, ''))