Added logic to load translations and to translate texts

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