text: import math
  import random
  import re
  from typing import Union, Tuple
  
  from src.data_preprocessors.language_processors import (
      JavaAndCPPProcessor,
      CSharpProcessor,
      PythonProcessor,
      JavascriptProcessor,
      PhpProcessor,
  )
  from src.data_preprocessors.language_processors.go_processor import GoProcessor
  from src.data_preprocessors.language_processors.ruby_processor import RubyProcessor
  from src.data_preprocessors.language_processors.utils import get_tokens
  from src.data_preprocessors.transformations import TransformationBase
  
  processor_function = {
      "java": JavaAndCPPProcessor,
      "c": JavaAndCPPProcessor,
      "cpp": JavaAndCPPProcessor,
      "c_sharp": CSharpProcessor,
      "python": PythonProcessor,
      "javascript": JavascriptProcessor,
      "go": GoProcessor,
      "php": PhpProcessor,
      "ruby": RubyProcessor,
  }
  
  tokenizer_function = {
      "java": get_tokens,
      "c": get_tokens,
      "cpp": get_tokens,
      "c_sharp": get_tokens,
      "python": PythonProcessor.get_tokens,
      "javascript": JavascriptProcessor.get_tokens,
      "go": get_tokens,
      "php": PhpProcessor.get_tokens,
      "ruby": get_tokens,
  }
  
  
  class VarRenamer(TransformationBase):
      def __init__(
              self,
              parser_path: str,
              language: str
      ):
          super(VarRenamer, self).__init__(
              parser_path=parser_path,
              language=language,
          )
          self.language = language
          self.processor = processor_function[self.language]
          self.tokenizer_function = tokenizer_function[self.language]
          # C/CPP: function_declarator
          # Java: class_declaration, method_declaration
          # python: function_definition, call
          # js: function_declaration
          self.not_var_ptype = ["function_declarator", "class_declaration", "method_declaration", "function_definition",
                                "function_declaration", "call", "local_function_statement"]
  
      def extract_var_names(self, root, code_string):
          var_names = []
          queue = [root]
  
          while len(queue) > 0:
              current_node = queue[0]
              queue = queue[1:]
              if (current_node.type == "identifier" or current_node.type == "variable_name") and str(
                      current_node.parent.type) not in self.not_var_ptype:
                  var_names.append(self.tokenizer_function(code_string, current_node)[0])
              for child in current_node.children:
                  queue.append(child)
          return var_names
  
      def var_renaming(self, code_string):
          root = self.parse_code(code_string)
          original_code = self.tokenizer_function(code_string, root)
          # print(" ".join(original_code))
          var_names = self.extract_var_names(root, code_string)
          var_names = list(set(var_names))
          num_to_rename = math.ceil(0.2 * len(var_names))
          random.shuffle(var_names)
          var_names = var_names[:num_to_rename]
          var_map = {}
          for idx, v in enumerate(var_names):
              var_map[v] = f"VAR_{idx}"
          modified_code = []
          for t in original_code:
              if t in var_names:
                  modified_code.append(var_map[t])
              else:
                  modified_code.append(t)
  
          modified_code_string = " ".join(modified_code)
          if modified_code != original_code:
              modified_root = self.parse_code(modified_code_string)
              return modified_root, modified_code_string, True
          else:
              return root, code_string, False
  
      def transform_code(
              self,
              code: Union[str, bytes]
      ) -> Tuple[str, object]:
          root, code, success = self.var_renaming(code)
          code = re.sub("[ \n\t]+", " ", code)
          return code, {
              "success": success
          }
  
  
  if __name__ == '__main__':
      java_code = """
      class A{
          int foo(int n){
              int res = 0;
              for(int i = 0; i < n; i++) {
                  int j = 0;
                  while (j < i){
                      res += j; 
                  }
              }
              return res;
          }
      }
      """
      python_code = """def foo(n):
      res = 0
      for i in range(0, 19, 2):
          res += i
      i = 0
      while i in range(n):
          res += i
          i += 1
      return res
      """
      c_code = """
          int foo(int n){
              int res = 0;
              for(int i = 0; i < n; i++) {
                  int j = 0;
                  while (j < i){
                      res += j; 
                  }
              }
              return res;
          }
      """
      cs_code = """
      int foo(int n){
              int res = 0, i = 0;
              while(i < n) {
                  int j = 0;
                  while (j < i){
                      res += j; 
                  }
              }
              return res;
          }
      """
      js_code = """function foo(n) {
          let res = '';
          for(let i = 0; i < 10; i++){
              res += i.toString();
              res += '<br>';
          } 
          while ( i < 10 ; ) { 
              res += 'bk'; 
          }
          return res;
      }
      """
      ruby_code = """
          for i in 0..5 do
             puts "Value of local variable is #{i}"
             if false then
                  puts "False printed"
                  while i == 10 do
                      print i;
                  end
                  i = u + 8
              end
          end
          """
      go_code = """
          func main() {
              sum := 0;
              i := 0;
              for ; i < 10;  {
                  sum += i;
              }
              i++;
              fmt.Println(sum);
          }
          """
      php_code = """
      <?php 
      for ($x = 0; $x <= 10; $x++) {
          echo "The number is: $x <br>";
      }
      $x = 0 ; 
      while ( $x <= 10 ) { 
          echo "The number is:  $x  <br> "; 
          $x++; 
      } 
      ?> 
      """
      input_map = {
          "java": ("java", java_code),
          "c": ("c", c_code),
          "cpp": ("cpp", c_code),
          "cs": ("c_sharp", cs_code),
          "js": ("javascript", js_code),
          "python": ("python", python_code),
          "php": ("php", php_code),
          "ruby": ("ruby", ruby_code),
          "go": ("go", go_code),
      }
      for lang in ["c", "cpp", "java", "python", "php", "ruby", "js", "go", "cs"]:
          lang, code = input_map[lang]
          var_renamer = VarRenamer(
              "", lang
          )
          print(lang)
          code, meta = var_renamer.transform_code(code)
          print(re.sub("[ \t\n]+", " ", code))
          print(meta)
          print("=" * 150)
  