i18n/resource_loader.py
import os.path
from . import config
from .loaders.loader import I18nFileLoadError
from . import translations
loaders = {}
PLURALS = ["zero", "one", "few", "many", "other"]
def register_loader(loader_class, supported_extensions):
if not hasattr(loader_class, "load_resource"):
raise ValueError("loader class should have a 'load_resource' method")
for extension in supported_extensions:
loaders[extension] = loader_class()
def load_resource(filename, root_data):
extension = os.path.splitext(filename)[1][1:]
if extension not in loaders:
raise I18nFileLoadError("no loader available for extension {0}".format(extension))
return getattr(loaders[extension], "load_resource")(filename, root_data)
def init_loaders():
init_python_loader()
if config.yaml_available:
init_yaml_loader()
if config.json_available:
init_json_loader()
def init_python_loader():
from .loaders.python_loader import PythonLoader
register_loader(PythonLoader, ["py"])
def init_yaml_loader():
from .loaders.yaml_loader import YamlLoader
register_loader(YamlLoader, ["yml", "yaml"])
def init_json_loader():
from .loaders.json_loader import JsonLoader
register_loader(JsonLoader, ["json"])
def load_config(filename):
settings_data = load_resource(filename, "settings")
for key, value in settings_data.items():
config.settings[key] = value
def get_namespace_from_filepath(filename):
namespace = os.path.dirname(filename).strip(os.sep).replace(os.sep, config.get('namespace_delimiter'))
if '{namespace}' in config.get('filename_format'):
try:
splitted_filename = os.path.basename(filename).split('.')
if namespace:
namespace += config.get('namespace_delimiter')
namespace += splitted_filename[config.get('filename_format').index('{namespace}')]
except ValueError:
raise I18nFileLoadError("incorrect file format.")
return namespace
def load_translation_file(filename, base_directory, locale=config.get('locale')):
skip_locale_root_data = config.get('skip_locale_root_data')
root_data = None if skip_locale_root_data else locale
translations_dic = load_resource(os.path.join(base_directory, filename), root_data)
namespace = get_namespace_from_filepath(filename)
load_translation_dic(translations_dic, namespace, locale)
def load_translation_dic(dic, namespace, locale):
if namespace:
namespace += config.get('namespace_delimiter')
for key, value in dic.items():
if type(value) == dict and len(set(PLURALS).intersection(value)) < 2:
load_translation_dic(value, namespace + key, locale)
else:
translations.add(namespace + key, value, locale)
def load_directory(directory, locale=config.get('locale')):
for f in os.listdir(directory):
path = os.path.join(directory, f)
if os.path.isfile(path) and path.endswith(config.get('file_format')):
if '{locale}' in config.get('filename_format') and not locale in f:
continue
load_translation_file(f, directory, locale)
def search_translation(key, locale=config.get('locale')):
splitted_key = key.split(config.get('namespace_delimiter'))
if not splitted_key:
return
namespace = splitted_key[:-1]
if not namespace and '{namespace}' not in config.get('filename_format'):
for directory in config.get('load_path'):
load_directory(directory, locale)
else:
for directory in config.get('load_path'):
recursive_search_dir(namespace, '', directory, locale)
def recursive_search_dir(splitted_namespace, directory, root_dir, locale=config.get('locale')):
if not splitted_namespace:
return
seeked_file = config.get('filename_format').format(namespace=splitted_namespace[0], format=config.get('file_format'), locale=locale)
dir_content = os.listdir(os.path.join(root_dir, directory))
if seeked_file in dir_content:
load_translation_file(os.path.join(directory, seeked_file), root_dir, locale)
elif splitted_namespace[0] in dir_content:
recursive_search_dir(splitted_namespace[1:], os.path.join(directory, splitted_namespace[0]), root_dir, locale)