How to check user name and last name length in one textfield in android jetpack compose? - kotlin

Question

There is an outlinedtextfield where the user enters his/her name and surname, and this outlinetextfield enters the user name and surname, but if the user's name and surname are less than 3 characters, I want to make the border of the outlinetextfield red, but I couldn't figure out how to do this control because space intervened.
for example :
a(space)b wrong
jac(space)jac correct
tony(space)stark correct
this is my example code:
OutlinedTextField(
value = state.name,
onValueChange = { onChangeName(it) },
modifier = Modifier
.fillMaxWidth(),
shape = RoundedCornerShape(25.dp),
label = {
Text(
text = "name and lastname",
fontSize = 14.sp,
color = Color.White
)
},
colors = TextFieldDefaults.outlinedTextFieldColors(
focusedBorderColor = if (state.name.length < 7) Color.Red else DefaultDYTColor,
unfocusedBorderColor = Color.Transparent
)
)
When I do it this way, it accepts it as correct even if I type 7 characters without spaces, but it should not be like this.
for example:
tonystark
According to the code I wrote, this is correct because it is greater than 7 characters
How to achieve this issue ? Do you have any suggestion or solve ?

Answer 1

This is just an algorithmic problem, you can solve it like this:
fun isValidName(name: String): Boolean {
// split name on each space and filter out those that are blank (consecutive spaces)
val splits = name.split(" ").filter { it.isNotBlank() }
// we need at least 2 strings (name and surname)
// you can also use != 2 if you want exactly 2
if (splits.size < 2) return false
// if any name is less than 3 chars, return false
for (split in splits) {
if (split.trim().length < 3) {
return false
}
}
// now we have at least 2 names and all of them have 3 or more chars
return true
}