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refactor CompatUtil

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This commit is contained in:
Adam Velebil 2023-01-26 17:21:04 +01:00
parent 4149f99f88
commit 567ae5ac60
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1 changed files with 23 additions and 16 deletions
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39
android/app/src/main/kotlin/com/yubico/authenticator/CompatUtil.kt
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@ -42,13 +42,18 @@ class CompatUtil(private val sdkVersion: Int) {
/**
* Wrapper class holding values computed by [CompatUtil]
*/
class CompatValue<T>() {
var value: T? = null
var isValid: Boolean = false
class CompatValue<T> private constructor() {
companion object {
fun <T> of(value: T) = CompatValue(value)
fun <T> empty() = CompatValue<T>()
}
constructor(value: T) : this() {
private var value: T? = null
private var hasValue: Boolean = false
private constructor(value: T) : this() {
this.value = value
isValid = true
hasValue = true
}
/**
@ -56,7 +61,7 @@ class CompatUtil(private val sdkVersion: Int) {
*/
@Suppress("UNCHECKED_CAST")
fun otherwise(block: () -> T): T =
if (isValid) {
if (hasValue) {
if (value == null) {
null as T
} else {
@ -78,11 +83,7 @@ class CompatUtil(private val sdkVersion: Int) {
* @return wrapped value
*/
fun <T> until(version: Int, block: () -> T): CompatValue<T> =
if (sdkVersion < version) {
CompatValue(block())
} else {
CompatValue()
}
`when`({ sdkVersion < version }, block)
/**
* Execute [block] only on devices running higher or equal sdk version than [version]
@ -90,11 +91,17 @@ class CompatUtil(private val sdkVersion: Int) {
* @return wrapped value
*/
fun <T> from(version: Int, block: () -> T): CompatValue<T> =
if (sdkVersion >= version) {
CompatValue(block())
} else {
CompatValue()
}
`when`({ sdkVersion >= version }, block)
/**
* Execute [block] only when predicate [p] holds
*
* @return wrapped value
*/
private fun <T> `when`(p: () -> Boolean, block: () -> T): CompatValue<T> = when {
p() -> CompatValue.of(block())
else -> CompatValue.empty()
}
}
val compatUtil = CompatUtil(Build.VERSION.SDK_INT)