Need a groovy script for below details. Please help.

[R]

 I need to write a groovy script based on below scenerio.

If Server Group A - a ,b ,c

then execute  Build URLs for group A ( http links )

If Sever Group B - any server besides the one given in server group A

then execute Build URLs for group B ( http links )

Here the JIRA field will have details besides server and based on server value given in the field in JIRA i  have to extract those details in my script.

I thought to use if.. else for my scenerio. But i need help like how to extract server details under that if..else.

I hope i am able to explain my query. Please reply as early as possible. Thanks.

[Nic Brough -Adaptavist-]

Essentially the same question as https://community.atlassian.com/t5/Jira-Questions/Need-a-groovy-script-to-extract-server-details-from-field-given/qaq-p/1423711