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package cat.freya.khs.config.util
import cat.freya.khs.config.Comment
import cat.freya.khs.config.KhsDeprecated
import cat.freya.khs.config.LocaleString1
import cat.freya.khs.config.LocaleString2
import cat.freya.khs.config.LocaleString3
import cat.freya.khs.config.Omittable
import cat.freya.khs.config.Section
import kotlin.reflect.full.isSubclassOf
import kotlin.reflect.full.memberProperties
import kotlin.reflect.full.primaryConstructor
import kotlin.text.buildString
import org.yaml.snakeyaml.DumperOptions
import org.yaml.snakeyaml.Yaml
fun typeInline(value: Any?): Boolean {
if (value == null) return true
return when (value) {
is List<*> -> value.all { typeInline(it) }
is Map<*, *> -> value.isEmpty()
is Boolean -> true
value::class.isData -> false
else -> true
}
}
fun serializeSection(section: Section): String {
val width = 100
val prefixWidth = 3
val headerWidth = section.text.length
val slugWidth = width - prefixWidth - headerWidth
return buildString {
appendLine() // spacing
// top line
append("#")
append(" ".repeat(prefixWidth))
append("┌")
append("─".repeat(headerWidth + 2))
appendLine("┐")
// bottom line
append("#")
append("─".repeat(prefixWidth))
append("┘ ${section.text} └")
appendLine("─".repeat(slugWidth))
appendLine() // spacing
}
}
fun serializeComment(comment: Comment): String {
return buildString {
for (line in comment.text.lines()) {
appendLine("# $line")
}
}
}
fun serializeDeprecated(deprecated: KhsDeprecated): String {
return "Warning: This field has been DEPRECATED since ${deprecated.since}"
}
fun <T : Any> serializeClass(instance: T): String {
val type = instance::class
require(type.isData) { "$type is not a data class" }
val propValues =
type.primaryConstructor!!
.parameters
.map { param -> type.memberProperties.find { it.name == param.name } }
.filterNotNull()
.associateWith { prop -> prop.getter.call(instance) }
return buildString {
for ((prop, value) in propValues) {
if (value == null && prop.annotations.contains(Omittable())) continue
val lines = serialize(value).trim().lines().filter { it.isNotEmpty() }
// append comments
for (annotation in prop.annotations) {
when (annotation) {
is Section -> append(serializeSection(annotation))
is Comment -> append(serializeComment(annotation))
is KhsDeprecated -> append(serializeDeprecated(annotation))
}
}
// no content, then skip
if (lines.isEmpty()) continue
// no indentation if only a single item
if (lines.size == 1 && typeInline(value)) {
appendLine("${prop.name}: ${lines[0]}")
continue
}
appendLine("${prop.name}:")
for (line in lines) {
appendLine(" $line")
}
}
}
}
fun <T : Any?> serializeList(list: List<T>): String {
if (list.isEmpty()) return "[]"
if (list.size == 1 && typeInline(list)) {
val text = serialize(list[0])
return "[$text]"
}
return buildString {
for (value in list) {
val lines = serialize(value).trim().lines().filter { it.isNotEmpty() }
for ((i, line) in lines.withIndex()) {
append(if (i == 0) "- " else " ")
appendLine(line)
}
}
}
}
fun <K : Any?, V : Any?> serializeMap(map: Map<K, V>): String {
if (map.isEmpty()) return "{}"
return buildString {
for ((key, value) in map) {
if (key !is String) error("Map values must be strings")
val keyString = key.toString()
val lines = serialize(value).trim().lines().filter { it.isNotEmpty() }
if (lines.isEmpty()) continue
if (lines.size == 1 && typeInline(value)) {
appendLine("$keyString: ${lines[0]}")
continue
}
appendLine("$keyString:")
for (line in lines) {
append(" ")
appendLine(line)
}
}
}
}
fun <T : Any> serializePrimitive(value: T): String {
val stringYaml =
Yaml(
DumperOptions().apply {
defaultScalarStyle = DumperOptions.ScalarStyle.SINGLE_QUOTED
splitLines = false
}
)
val yaml = Yaml()
return when {
value is String -> stringYaml.dump(value)
value is LocaleString1 -> stringYaml.dump(value.inner)
value is LocaleString2 -> stringYaml.dump(value.inner)
value is LocaleString3 -> stringYaml.dump(value.inner)
value is Int -> yaml.dump(value)
value is UInt -> yaml.dump(value.toInt())
value is Long -> yaml.dump(value)
value is ULong -> yaml.dump(value.toLong())
value is Boolean -> yaml.dump(value)
value is Float -> yaml.dump(value)
value is Double -> yaml.dump(value)
else -> error("cannot serialize '$value'")
}.trim()
}
fun <T : Any> serialize(value: T?): String {
if (value == null) return "null"
val type = value::class
return when {
type.isData -> serializeClass(value)
type.java.isEnum -> value.toString()
type.isSubclassOf(List::class) -> serializeList(value as List<*>)
type.isSubclassOf(Map::class) -> serializeMap(value as Map<*, *>)
else -> serializePrimitive(value)
}
}
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