lang: update translation system

gamecore/lang.lua

@@ -76,4 +76,46 @@ function LanguageManager:getCurrentLangName()
   return self:getLangName(self.data.current)
 end
 
+-- TRANSLATION FUNCTIONS
+-- get the translation of a string
+
+function LanguageManager:getTranslationStringList(lang, library)
+  local _path = self.data.path .. lang .. "/" .. library
+  local fileinfo = love.filesystem.getInfo(_path .. ".lua")
+  local list = nil
+
+  if fileinfo ~= nil then
+    list = require(_path)
+  else
+    print("WARNING: file " .. _path .. " do not exists")
+  end
+
+  return list
+end
+
+function LanguageManager:translateFromLang(lang, library, stringToTranslate)
+  local _stringlist = self:getTranslationStringList(lang, library)
+
+  if _stringlist == nil then
+    return nil
+  else
+    return _stringlist[stringToTranslate]
+  end
+end
+
+function LanguageManager:translate(library, string)
+  local translation = self:translateFromLang(self.data.current, library, string)
+
+  if (translation == nil) then
+    translation = self:translateFromLang(self.data.default, library, string)
+  end
+
+  if (translation == nil) then
+    translation = string
+    print("WARNING: no translation path found for " .. string .. " in " .. library)
+  end
+
+  return translation
+end
+
 return LanguageManager