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@file:OptIn(ExperimentalTypeInference::class, ExperimentalContracts::class)
package moe.nea.firmament.util
import java.util.regex.Matcher
import java.util.regex.Pattern
import org.intellij.lang.annotations.Language
import kotlin.contracts.ExperimentalContracts
import kotlin.contracts.InvocationKind
import kotlin.contracts.contract
import kotlin.experimental.ExperimentalTypeInference
import kotlin.time.Duration
import kotlin.time.Duration.Companion.minutes
import kotlin.time.Duration.Companion.seconds
inline fun <T> String.ifMatches(regex: Regex, block: (MatchResult) -> T): T? =
regex.matchEntire(this)?.let(block)
inline fun <T> Pattern.useMatch(string: String, block: Matcher.() -> T): T? {
contract {
callsInPlace(block, InvocationKind.AT_MOST_ONCE)
}
return matcher(string)
.takeIf(Matcher::matches)
?.let(block)
}
@Language("RegExp")
val TIME_PATTERN = "[0-9]+[ms]"
@Language("RegExp")
val SHORT_NUMBER_FORMAT = "[0-9]+(?:,[0-9]+)*(?:\\.[0-9]+)?[kKmMbB]?"
val siScalars = mapOf(
'k' to 1_000.0,
'K' to 1_000.0,
'm' to 1_000_000.0,
'M' to 1_000_000.0,
'b' to 1_000_000_000.0,
'B' to 1_000_000_000.0,
)
fun parseTimePattern(text: String): Duration {
val length = text.dropLast(1).toInt()
return when (text.last()) {
'm' -> length.minutes
's' -> length.seconds
else -> error("Invalid pattern for time $text")
}
}
fun parseShortNumber(string: String): Double {
if (string.startsWith("-")) return -parseShortNumber(string.substring(1))
if (string.startsWith("+")) return parseShortNumber(string.substring(1))
var k = string.replace(",", "")
val scalar = k.last()
var scalarMultiplier = siScalars[scalar]
if (scalarMultiplier == null) {
scalarMultiplier = 1.0
} else {
k = k.dropLast(1)
}
return k.toDouble() * scalarMultiplier
}
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