Move LocalizedValue and add get_language_codes

localized_fields/localized_value.py

@@ -0,0 +1,82 @@
+from django.conf import settings
+from django.utils import translation
+
+
+class LocalizedValue:
+    """Represents the value of a :see:LocalizedField."""
+
+    def __init__(self, keys: dict=None):
+        """Initializes a new instance of :see:LocalizedValue.
+
+        Arguments:
+            keys:
+                The keys to initialize this value with. Every
+                key contains the value of this field in a
+                different language.
+        """
+
+        if isinstance(keys, str):
+            setattr(self, settings.LANGUAGE_CODE, keys)
+        else:
+            for lang_code, _ in settings.LANGUAGES:
+                value = keys.get(lang_code) if keys else None
+                setattr(self, lang_code, value)
+
+    def get(self, language: str=None) -> str:
+        """Gets the underlying value in the specified or
+        primary language.
+
+        Arguments:
+            language:
+                The language to get the value in.
+
+        Returns:
+            The value in the current language, or
+            the primary language in case no language
+            was specified.
+        """
+
+        language = language or settings.LANGUAGE_CODE
+        return getattr(self, language, None)
+
+    def set(self, language: str, value: str):
+        """Sets the value in the specified language.
+
+        Arguments:
+            language:
+                The language to set the value in.
+
+            value:
+                The value to set.
+        """
+
+        setattr(self, language, value)
+        return self
+
+    def deconstruct(self) -> dict:
+        """Deconstructs this value into a primitive type.
+
+        Returns:
+            A dictionary with all the localized values
+            contained in this instance.
+        """
+
+        path = 'localized_fields.fields.LocalizedValue'
+        return path, [self.__dict__], {}
+
+    def __str__(self) -> str:
+        """Gets the value in the current language, or falls
+        back to the primary language if there's no value
+        in the current language."""
+
+        value = self.get(translation.get_language())
+
+        if not value:
+            value = self.get(settings.LANGUAGE_CODE)
+
+        return value or ''
+
+    def __repr__(self):  # pragma: no cover
+        """Gets a textual representation of this object."""
+
+        return 'LocalizedValue<%s> 0x%s' % (self.__dict__, id(self))