Scriptrunner Condtion to check user URL is homepage

[AisM]

I have a Scriptrunner fragment, which is supposed to run when certain conditions are met. One of the condition is to check if user URL is the homepage . I have the below code, but for some reason it doesn't work. But it does work for the date logic alone, and not when combined with the user URL . Can anyone please validate if its right.

def webActionSupport = ComponentAccessor.getComponent(JiraWebActionSupport)
def requestURL = webActionSupport.getHttpRequest().getRequestURI()

def homepageURL = "my homepageURL"

//Logic defined at end of script

 if ((requestURL == homepageURL) && (today>=start && today<=end)) {
log1.info("Success:") 
return true
}
}
return false

[AisM]

@Antoine Berry  The requirement was like, we need to have a dialog pop up box at the time of maintenance. When the user logs in, the box must pop up. Also, the time when this must show up must be controlled from a service desk. 

We were able to actually achieve this. The dates for when the box shows up is done through two custom field vales "Start date & end date". 

But the problem I have is, the box shows up every time the page loads. More like a nuisance at this point. I want the pop up box to be limited to once per user in a day, or maybe ONLY at the log in page or something.