168 lines
7.3 KiB
Python
168 lines
7.3 KiB
Python
import os
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import random
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import re
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import six
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import yaml
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from collections import defaultdict
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from geodata.configs.utils import nested_get, DoesNotExist, alternative_probabilities
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from geodata.encoding import safe_decode
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from geodata.math.floats import isclose
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from geodata.math.sampling import cdf, weighted_choice
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from geodata.encoding import safe_encode
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this_dir = os.path.realpath(os.path.dirname(__file__))
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BOUNDARY_NAMES_DIR = os.path.join(this_dir, os.pardir, os.pardir, os.pardir,
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'resources', 'boundaries', 'names')
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BOUNDARY_NAMES_CONFIG = os.path.join(BOUNDARY_NAMES_DIR, 'global.yaml')
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class BoundaryNames(object):
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DEFAULT_NAME_KEY = 'name'
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def __init__(self, config_file=BOUNDARY_NAMES_CONFIG):
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config = yaml.load(open(config_file))
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default_names = nested_get(config, ('names', 'keys'))
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name_keys, probs = alternative_probabilities(default_names)
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self.name_keys = name_keys
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self.name_key_probs = cdf(probs)
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self.component_name_keys = {}
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for component, component_config in six.iteritems(nested_get(config, ('names', 'components'), default={})):
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component_names = component_config.get('keys')
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component_name_keys, component_probs = alternative_probabilities(component_names)
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self.component_name_keys[component] = (component_name_keys, cdf(component_probs))
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self.country_regex_replacements = defaultdict(list)
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for props in nested_get(config, ('names', 'regex_replacements',), default=[]):
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country = props.get('country')
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re_flags = re.I | re.UNICODE
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if not props.get('case_insensitive', True):
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re.flags ^= re.I
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pattern = re.compile(props['pattern'], re_flags)
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replace_group = props['replace_with_group']
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replace_probability = props['replace_probability']
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self.country_regex_replacements[country].append((pattern, replace_group, replace_probability))
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self.country_regex_replacements = dict(self.country_regex_replacements)
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self.prefixes = {}
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self.prefix_regexes = {}
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self.suffixes = {}
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self.suffix_regexes = {}
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for language, components in six.iteritems(nested_get(config, ('names', 'prefixes', 'language'), default={}) ):
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for component, affixes in six.iteritems(components):
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affix_values, probs = alternative_probabilities(affixes)
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for val in affix_values:
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if 'prefix' not in val:
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raise AssertionError(six.u('Invalid prefix value for (language={}, component={}): {} ').format(language, component, val))
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prefix_regex = six.u('|').join([six.u('(?:{} )').format(self._string_as_regex(v['prefix'])) if v.get('whitespace') else self._string_as_regex(v['prefix']) for v in affix_values])
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self.prefix_regexes[(language, component)] = re.compile(six.u('^{}').format(prefix_regex), re.I | re.U)
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if not isclose(sum(probs), 1.0):
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affix_values.append(None)
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probs.append(1.0 - sum(probs))
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affix_probs_cdf = cdf(probs)
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self.prefixes[(language, component)] = affix_values, affix_probs_cdf
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for language, components in six.iteritems(nested_get(config, ('names', 'suffixes', 'language'), default={}) ):
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for component, affixes in six.iteritems(components):
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affix_values, probs = alternative_probabilities(affixes)
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for val in affix_values:
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if 'suffix' not in val:
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raise AssertionError(six.u('Invalid suffix value for (language={}, component={}): {} ').format(language, component, val))
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suffix_regex = six.u('|').join([six.u('(?: {})').format(self._string_as_regex(v['suffix'])) if v.get('whitespace') else self._string_as_regex(v['suffix']) for v in affix_values])
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self.suffix_regexes[(language, component)] = re.compile(six.u('{}$').format(suffix_regex), re.I | re.U)
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if not isclose(sum(probs), 1.0):
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affix_values.append(None)
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probs.append(1.0 - sum(probs))
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affix_probs_cdf = cdf(probs)
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self.suffixes[(language, component)] = affix_values, affix_probs_cdf
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self.exceptions = {}
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for props in nested_get(config, ('names', 'exceptions'), default=[]):
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object_type = props['type']
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object_id = safe_encode(props['id'])
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keys = [props['default']]
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probs = [props['probability']]
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for alt in props.get('alternatives', []):
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keys.append(alt['alternative'])
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probs.append(alt['probability'])
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probs = cdf(probs)
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self.exceptions[(object_type, object_id)] = (keys, probs)
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def _string_as_regex(self, s):
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return safe_decode(s).replace(six.u('.'), six.u('\\.'))
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def valid_name(self, object_type, object_id, name):
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exceptions, probs = self.exceptions.get((object_type, object_id), ((), ()))
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return not exceptions or name in exceptions
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def name_key_dist(self, props, component):
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object_type = props.get('type')
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object_id = safe_encode(props.get('id', ''))
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if (object_type, object_id) in self.exceptions:
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values, probs = self.exceptions[(object_type, object_id)]
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return values, probs
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name_keys, probs = self.component_name_keys.get(component, (self.name_keys, self.name_key_probs))
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return name_keys, probs
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def name_key(self, props, component):
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name_keys, probs = self.name_key_dist(props, component)
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return weighted_choice(name_keys, probs)
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def name(self, country, language, component, name):
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all_replacements = self.country_regex_replacements.get(country, []) + self.country_regex_replacements.get(None, [])
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prefixes, prefix_probs = self.prefixes.get((language, component), (None, None))
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suffixes, suffix_probs = self.suffixes.get((language, component), (None, None))
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if not all_replacements and not prefixes and not suffixes:
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return name
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for regex, group, prob in all_replacements:
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match = regex.match(name)
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if match and random.random() < prob:
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name = match.group(group)
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for affixes, affix_probs, regexes, key, direction in ((prefixes, prefix_probs, self.prefix_regexes, 'prefix', 0),
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(suffixes, suffix_probs, self.suffix_regexes, 'suffix', 1)):
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if affixes is not None:
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regex = regexes[language, component]
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if regex.match(name):
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continue
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affix = weighted_choice(affixes, affix_probs)
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if affix is not None:
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whitespace = affix.get('whitespace', True)
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space_val = six.u(' ') if whitespace else six.u('')
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affix = affix[key]
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if direction == 0:
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return six.u('{}{}{}').format(affix, space_val, safe_decode(name))
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else:
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return six.u('{}{}{}').format(safe_decode(name), space_val, affix)
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return name
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boundary_names = BoundaryNames()
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