feat: type enrichment (#408)

enrichment/build.gradle.kts

@@ -0,0 +1,34 @@
+plugins {
+  kotlin("jvm")
+  id("io.bkbn.sourdough.library.jvm")
+  id("io.gitlab.arturbosch.detekt")
+  id("com.adarshr.test-logger")
+  id("maven-publish")
+  id("java-library")
+  id("signing")
+  id("org.jetbrains.kotlinx.kover")
+}
+
+sourdoughLibrary {
+  libraryName.set("Kompendium Type Enrichment")
+  libraryDescription.set("Utility library for creating portable type enrichments")
+  compilerArgs.set(listOf("-opt-in=kotlin.RequiresOptIn"))
+}
+
+dependencies {
+  // Versions
+  val detektVersion: String by project
+
+  // Formatting
+  detektPlugins("io.gitlab.arturbosch.detekt:detekt-formatting:$detektVersion")
+
+  testImplementation(testFixtures(projects.kompendiumCore))
+}
+
+testing {
+  suites {
+    named("test", JvmTestSuite::class) {
+      useJUnitJupiter()
+    }
+  }
+}

enrichment/src/main/kotlin/io/bkbn/kompendium/enrichment/Enrichment.kt

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+package io.bkbn.kompendium.enrichment
+
+sealed interface Enrichment

enrichment/src/main/kotlin/io/bkbn/kompendium/enrichment/PropertyEnrichment.kt

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+package io.bkbn.kompendium.enrichment
+
+class PropertyEnrichment : Enrichment {
+  var deprecated: Boolean? = null
+  var description: String? = null
+  var typeEnrichment: TypeEnrichment<*>? = null
+}

enrichment/src/main/kotlin/io/bkbn/kompendium/enrichment/TypeEnrichment.kt

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+package io.bkbn.kompendium.enrichment
+
+import kotlin.reflect.KProperty
+import kotlin.reflect.KProperty1
+
+class TypeEnrichment<T>(val id: String) : Enrichment {
+
+  private val enrichments: MutableMap<KProperty1<*, *>, Enrichment> = mutableMapOf()
+
+  fun getEnrichmentForProperty(property: KProperty<*>): Enrichment? = enrichments[property]
+
+  operator fun <R> KProperty1<T, R>.invoke(init: PropertyEnrichment.() -> Unit) {
+    require(!enrichments.containsKey(this)) { "${this.name} has already been registered" }
+    val propertyEnrichment = PropertyEnrichment()
+    init.invoke(propertyEnrichment)
+    enrichments[this] = propertyEnrichment
+  }
+
+  companion object {
+    inline operator fun <reified T> invoke(id: String, init: TypeEnrichment<T>.() -> Unit): TypeEnrichment<T> {
+      val builder = TypeEnrichment<T>(id)
+      return builder.apply(init)
+    }
+  }
+}