How to Change Up Methods According to Parameter

Hi…
I have two methods.but the parameter will be changing.
For the first method i send only one parameter(f).
But for the second method i’ll send 3
parameters(f,search_string_1,search_string_2).
And also for 3rd Method i send Two Parameter(f,search_string).

Is it possible to optimise below methods into Single Methods .
How can i combine the below Three Methods into one method pls help me.

#method 1
def check_chat_type(f)
Dir.foreach(File.join(RAILS_ROOT +
“/public/ACMServer_exe/ChatHistory”,f)) do sub_folder_name|
if sub_folder_name.include? “Vs”
get_path(f,sub_folder_name)
end
end
end

#method 2
def check_chat_type(f,search_string_1,search_string_2)
Dir.foreach(File.join(RAILS_ROOT +
“/public/ACMServer_exe/ChatHistory”,f)) do
|sub_folder_name|
if sub_folder_name.include? “Vs”
if sub_folder_name.include?(search_string_1)
if sub_folder_name.include?(search_string_2)
get_path(f,sub_folder_name)
end
end
end
end
end

#Method 3
def check_chat_type(f,search_string)
Dir.foreach(File.join(RAILS_ROOT +
“/public/ACMServer_exe/ChatHistory”,f)) do
|sub_folder_name|
if sub_folder_name.include? “Vs”
if sub_folder_name.include?(search_string)
get_path(f,sub_folder_name)
end
end
end
end

this makes param 2 and 3 optional (if none is passed default values

are set to empty string):
def check_chat_type(f, search_string_1="", search_string_2="")