how to setup a for loop inside if statement with correct syntax Play framework Scala Template - scala

Question

I am trying to setup a variable in the scala template. Loop through the roles that user have , if found out the user is customer , then do something with the input. If not then do something else.
But scala isnt that simple , it won't compile on following code.
#var = #{ if(user != null){
#for(role <- user.roles.filter(_.getName()=="customer")) {
var=#customer(input)
}
}
}
#if( var == null){
var=#others(input)
}
It gives me two errors
t.scala.html:275:: identifier expected but 'for' found.
[error] #for(role <- user.roles.filter(_.getName()=="customer"))
t.scala.html:278: expected start of definition
Also , is there a better way to do this in scala ? Thanks
My reference : Scala template set variable
Update:
My goal was trying to do something like below , but in scala template:
result=null
for role in User.roles:
if(role == "customer"):
result=customer(xyz)
break
if(result==null):
result = others(xyz)

Answer 1

To set up a for loop inside of an if statement in a Scala template, you don't need to assign a variable. You can simply use an if block in the template where you want to display stuff. For example
#if(user != null) {
#for(role <- user.roles.filter(_.getName()=="customer")) {
#customer(input)
#* Do other stuff related to 'role' and 'input' here *#
}
} else {
#* Do something else *#
}
For further reference I encourage you to look at the documentation for Play templates. If you really want to define a variable you could do it using the defining helper:
#defining(user.getFirstName() + " " + user.getLastName()) { fullName =>
<div>Hello #fullName</div>
}
Instead of defining a variable you could also define a resusable block, which might be useful in your case. For example,
#customer_loop(input: String) = {
#if(user != null) {
#for(role <- user.roles.filter(_.getName()=="customer")) {
#customer(input)
#* Do other stuff related to 'role' and 'input' here *#
}
} else {
#* Do something else *#
}
}

Answer 2

To declare a variable do
#import scala.Any; var result:Any=null //where Any is the datatype accoding to your requirement
To reassign its value do
#{result = "somevalue"}
So the solution accoding to the pseudo you provided
#import java.lang.String; var result:String=null
#import scala.util.control._;val loop = new Breaks;
#loop.breakable {
#for(role <- roleList) {
#if(role.equals("customer")) {
#{
result = "somevalue"
}
#{loop.break};
}
}
}
#if(result==null){
#{result="notfound"}
}
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