Added logic to load translations and to translate texts

src/cpl_translation/cpl-translation.json

@@ -4,19 +4,19 @@
     "Version": {
       "Major": "2022",
       "Minor": "8",
-      "Micro": "1"
+      "Micro": "1.dev7"
     },
     "Author": "Sven Heidemann",
     "AuthorEmail": "sven.heidemann@sh-edraft.de",
     "Description": "sh-edraft Common Python library Translation",
-    "LongDescription": "sh-edraft Common Python library Python i18n based Translation implementation",
+    "LongDescription": "sh-edraft Common Python library Python Translation",
     "URL": "https://www.sh-edraft.de",
     "CopyrightDate": "2022",
     "CopyrightName": "sh-edraft.de",
     "LicenseName": "MIT",
     "LicenseDescription": "MIT, see LICENSE for more details.",
     "Dependencies": [
-      "cpl-core>=2022.6.0"
+      "cpl-core>=2022.8.1.dev7"
     ],
     "DevDependencies": [
       "cpl-cli>=2022.6.0"

src/cpl_translation/translate_pipe.py

@@ -0,0 +1,16 @@
+from cpl_core.console import Console
+from cpl_core.pipes.pipe_abc import PipeABC
+from cpl_translation.translation_service_abc import TranslationServiceABC
+
+
+class TranslatePipe(PipeABC):
+
+    def __init__(self, translation: TranslationServiceABC):
+        self._translation = translation
+
+    def transform(self, value: any, *args):
+        try:
+            return self._translation.translate(value)
+        except KeyError as e:
+            Console.error(f'Translation {value} not found')
+            return ''

src/cpl_translation/translation_service.py

@@ -0,0 +1,54 @@
+import json
+import os.path
+from functools import reduce
+
+from cpl_core.console import Console
+from cpl_translation.translation_service_abc import TranslationServiceABC
+from cpl_translation.translation_settings import TranslationSettings
+
+
+class TranslationService(TranslationServiceABC):
+
+    def __init__(self):
+        self._translation = {}
+
+        self._language = ''
+        self._default_language = ''
+
+        TranslationServiceABC.__init__(self)
+
+    def set_default_lang(self, lang: str):
+        self._default_language = lang
+        self.set_lang(lang)
+
+    def set_lang(self, lang: str):
+        self._language = lang
+
+    def load(self, lang: str):
+        if not os.path.exists(f'translation/{lang}.json'):
+            raise FileNotFoundError()
+
+        file_dict = {}
+        with open(f'translation/{lang}.json', 'r') as file:
+            file_dict = json.load(file)
+            file.close()
+
+        self._translation[lang] = file_dict
+
+    def load_by_settings(self, settings: TranslationSettings):
+        if settings is None:
+            raise Exception(f'{TranslationSettings.__name__} not loaded')
+
+        self._language = settings.default_language
+        self._default_language = settings.default_language
+
+        for lang in settings.languages:
+            self.load(lang)
+
+    def translate(self, key: str) -> str:
+        value = reduce(lambda d, key: d.get(key) if isinstance(d, dict) else None, key.split("."), self._translation[self._language])
+
+        if value is None:
+            raise KeyError(f'Translation {key} not found')
+
+        return value

src/cpl_translation/translation_service_abc.py

@@ -0,0 +1,22 @@
+from abc import ABC, abstractmethod
+
+
+class TranslationServiceABC(ABC):
+
+    @abstractmethod
+    def __init__(self): pass
+
+    @abstractmethod
+    def set_default_lang(self, lang: str): pass
+
+    @abstractmethod
+    def set_lang(self, lang: str): pass
+
+    @abstractmethod
+    def load(self, lang: str): pass
+
+    @abstractmethod
+    def load_by_settings(self): pass
+
+    @abstractmethod
+    def translate(self, key: str) -> str: pass

src/cpl_translation/translation_settings.py

@@ -0,0 +1,29 @@
+import traceback
+
+from cpl_core.configuration.configuration_model_abc import ConfigurationModelABC
+from cpl_core.console import Console
+
+
+class TranslationSettings(ConfigurationModelABC):
+
+    def __init__(self):
+        ConfigurationModelABC.__init__(self)
+
+        self._languages = []
+        self._default_lang = ''
+
+    @property
+    def languages(self) -> list[str]:
+        return self._languages
+
+    @property
+    def default_language(self) -> str:
+        return self._default_lang
+
+    def from_dict(self, settings: dict):
+        try:
+            self._languages = settings['Languages']
+            self._default_lang = settings['DefaultLanguage']
+        except Exception as e:
+            Console.error(f'[ ERROR ] [ {__name__} ]: Reading error in {self.__name__} settings')
+            Console.error(f'[ EXCEPTION ] [ {__name__} ]: {e} -> {traceback.format_exc()}')