Bukkit

Hello
This is more of a feature request than an issue.. 

in the $script$ part of this plugin, can you add in a way to check if a command contains anything specific? 
My use would be, to check if the command contained other than alphanumerical characters in the arguments.  

I am making a custom GUI for name-color and nickname settings with MyCommands icon-menu, and set up so users decide their username with a custom command, using a custom variable. This variable is synced across my network using another powerful plugin. 
The issue is that they can bypass my permissions because when I force them to do "/mynick $arg1" The $arg1 can contain color codes as "&1" or whatever the creative person wants to use.  So if I could check if the command contained specific characters I could avoid this issue. 
So the user can bypass my permission system and set his desired color typing "/mynick &1Nickname". I want to disallow the "&" character in this command.

You can in the pastebin, (line 13-17) see my attempts using something similar that is shown in the help files. and I think I've tried at least 20 variations of this feature, but I gave up, commented it out, and asked here) 

Additionally, here is a pastebin and a .gif showing what I made so far, but it's not showing the use of color codes in the /mynick command.
https://pastebin.com/sTYvRL8u
https://imgur.com/xnOgUUa

Example of how I think it could look in the commands file. 
Mynick:
  command: /mynick
  type: RUN_CONSOLE
  runcmd:
   - "$Script$%if%$arg1{contain:&}"   <--- My thought how to define what to look for.. 
   - "$Script$%PlayerData%mynick=$player"
   - "$text$&aYour nickname contained illegal characters and is now saved as &e$player&a."
   - "$Script$%else%"
   - "$Script$%PlayerData%mynick=$arg1"
   - "$text$&aYour nickname is now saved as &e$PlayerData%mynick%&a."

   - /sync console all mynick $player $arg1
  permission-required: false
  required_args: 1
  require_all_arguments: true

I run MyCommand version 5.3.4 on Spigot version 1.12.2..

I hope you will consider this as this will improve the usage of this plugin for me a lot.  Also, allow me to thank you for this wonderful plugin, my server would be much less fun without it.. 
Cheers 
Digi

(Edit1: Added a .gif to show my use-case)
(Edit2: Added a Pastebin to show my working config)
(Edit3: Cleaning up and polishing my explanations)

The script line for the "contains" is "$Script$%if%$arg1.contains=&1" and not "$arg1.contains==&1", one = (equal) less.

Anyway, i tested and doesn't work completly fine leaving here only the &. A Workaround for now is doing this :

- "$Script$%if%$arg1.contains=&1<or>$arg1.contains=&2<or>$arg1.contains=&3" ecc ecc. In this way works. I'll see to make a better "contains" later, but for now, you can use this way here.

Thank you Ivanpro, hearing you looking into this in the future is great news! :) 
Also many thanks for providing me with a workaround, i will get to testing it right away!
Thanks again :)