[names] Adding name affix normalizations to a YAML config

scripts/geodata/names/normalization.py

@@ -1,32 +1,65 @@
-from __future__ import unicode_literals
+import os
 import re
+import six
+import yaml
 
 from geodata.encoding import safe_decode
 
-name_prefixes = ['{} '.format(s) for s in (
-    'city of',
-    'township of',
-    'regional municipality of',
-    'municipality of',
-    'borough of',
-    'london borough of',
-    'town of',
-)]
+this_dir = os.path.realpath(os.path.dirname(__file__))
 
-name_suffixes = [' {}'.format(s) for s in (
-    'township',
-    'municipality',
-)]
-
-name_prefix_regex = re.compile('^(?:{})'.format('|'.join(name_prefixes)), re.I | re.UNICODE)
-name_suffix_regex = re.compile('(?:{})$'.format('|'.join(name_suffixes)), re.I | re.UNICODE)
+AFFIX_CONFIG_DIR = os.path.join(this_dir, os.pardir, os.pardir, os.pardir,
+                                'resources', 'boundaries', 'names', 'languages')
 
 
-def replace_name_prefixes(name):
-    name = safe_decode(name)
-    return name_prefix_regex.sub('', name)
+class NameAffixes(object):
+    def __init__(self, config_dir=AFFIX_CONFIG_DIR):
+        self.config_dir = config_dir
 
+        self.language_prefixes = {}
+        self.language_suffixes = {}
 
-def replace_name_suffixes(name):
-    name = safe_decode(name)
-    return name_suffix_regex.sub('', name)
+        self.language_prefix_regexes = {}
+        self.language_suffix_regexes = {}
+
+        for filename in os.listdir(config_dir):
+            if not filename.endswith('.yaml'):
+                continue
+            lang = filename.rsplit('.yaml')[0]
+
+            conf = yaml.load(open(os.path.join(config_dir, filename)))
+
+            prefixes = conf.get('prefixes', [])
+            name_prefixes = [safe_decode(phrase).lower() for phrase in prefixes]
+            self.language_prefixes[lang] = name_prefixes
+
+            suffixes = conf.get('suffixes', [])
+            name_suffixes = [safe_decode(phrase).lower() for phrase in suffixes]
+            self.language_suffixes[lang] = name_suffixes
+
+            whitespace_phrase = six.u(' ') if conf.get('whitespace', True) else six.u('')
+
+            prefix_regex = six.u('^(?:{})').format(six.u('|').join(['{}{}'.format(s, whitespace_phrase) for s in name_prefixes]))
+            suffix_regex = six.u('(?:{})$').format(six.u('|').join(['{}{}'.format(whitespace_phrase, s) for s in name_suffixes]))
+
+            self.language_prefix_regexes[lang] = re.compile(prefix_regex, re.I | re.UNICODE)
+            self.language_suffix_regexes[lang] = re.compile(suffix_regex, re.I | re.UNICODE)
+
+    def replace_prefixes(self, name, lang):
+        name = safe_decode(name).strip()
+
+        re = self.language_prefix_regexes.get(lang)
+        if not re:
+            return name
+
+        return re.sub(six.u(''), name)
+
+    def replace_suffixes(self, name, lang):
+        name = safe_decode(name).strip()
+
+        re = self.language_suffix_regexes.get(lang)
+        if not re:
+            return name
+
+        return re.sub(six.u(''), name)
+
+name_affixes = NameAffixes()