Custom post title in custom post type

Hi

I have custom post type “Dealer” and I have disable everything in write panel including post title. I have meta box for post title. but as I dont have post title enabled, when I publish post it always save post as “draft” I need to know how to take my meta box as post title,

by searching support forums I found that I can achieve this by adding “post_title” filter, but I don’t know how to do that.

I have setup meta in separate file here is the code

[Code moderated as per the Forum Rules. Please use the pastebin]

You can check reference for similar type solution here

https://www.ads-software.com/support/topic/generating-and-setting-a-custom-post-title