[+] Wacca database models

src/main/java/ext/Json.kt

@@ -0,0 +1,53 @@
+package ext
+
+import com.fasterxml.jackson.annotation.JsonInclude
+import com.fasterxml.jackson.core.JsonParser
+import com.fasterxml.jackson.databind.*
+import com.fasterxml.jackson.databind.module.SimpleModule
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonNamingStrategy
+
+// Jackson
+val ACCEPTABLE_FALSE = setOf("0", "false", "no", "off", "False", "None", "null")
+val ACCEPTABLE_TRUE = setOf("1", "true", "yes", "on", "True")
+val JSON_FUZZY_BOOLEAN = SimpleModule().addDeserializer(Boolean::class.java, object : JsonDeserializer<Boolean>() {
+    override fun deserialize(parser: JsonParser, context: DeserializationContext) = when(parser.text) {
+        in ACCEPTABLE_FALSE -> false
+        in ACCEPTABLE_TRUE -> true
+        else -> 400 - "Invalid boolean value ${parser.text}"
+    }
+})
+val JSON_DATETIME = SimpleModule().addDeserializer(java.time.LocalDateTime::class.java, object : JsonDeserializer<java.time.LocalDateTime>() {
+    override fun deserialize(parser: JsonParser, context: DeserializationContext) =
+        parser.text.asDateTime() ?: (400 - "Invalid date time value ${parser.text}")
+})
+val JACKSON = jacksonObjectMapper().apply {
+    setSerializationInclusion(JsonInclude.Include.NON_NULL)
+    setDefaultPropertyInclusion(JsonInclude.Include.NON_NULL)
+    findAndRegisterModules()
+    registerModule(JSON_FUZZY_BOOLEAN)
+    registerModule(JSON_DATETIME)
+    configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+    setPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CAMEL_CASE);
+}
+inline fun <reified T> ObjectMapper.readValue(str: Str) = readValue(str, T::class.java)
+// TODO: https://stackoverflow.com/q/78197784/7346633
+inline fun <reified T> Str.parseJackson() = if (contains("null")) {
+    val map = JACKSON.readValue<MutableMap<String, Any>>(this)
+    JACKSON.convertValue(map.recursiveNotNull(), T::class.java)
+}
+else JACKSON.readValue(this, T::class.java)
+fun <T> T.toJson() = JACKSON.writeValueAsString(this)
+
+
+// KotlinX Serialization
+@OptIn(ExperimentalSerializationApi::class)
+val JSON = Json {
+    ignoreUnknownKeys = true
+    isLenient = true
+    namingStrategy = JsonNamingStrategy.SnakeCase
+    explicitNulls = false
+    coerceInputValues = true
+}