commonize url query parameters encoding/decoding

ktor/server/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/ktor/server/ServerRoutingShortcuts.kt

@@ -1,14 +1,12 @@
 package com.insanusmokrassar.postssystem.ktor.server
 
-import com.insanusmokrassar.postssystem.ktor.fromHex
 import com.insanusmokrassar.postssystem.ktor.standardKtorSerialFormat
 import io.ktor.application.ApplicationCall
 import io.ktor.http.HttpStatusCode
 import io.ktor.response.respond
 import io.ktor.response.respondBytes
 import io.ktor.util.toByteArray
-import kotlinx.serialization.DeserializationStrategy
-import kotlinx.serialization.SerializationStrategy
+import kotlinx.serialization.*
 
 suspend fun <T> ApplicationCall.unianswer(
     answerSerializer: SerializationStrategy<T>,
@@ -27,18 +25,6 @@ suspend fun <T> ApplicationCall.uniload(
     request.receiveChannel().toByteArray()
 )
 
-fun <T> ApplicationCall.uniloadFromQuery(
-    parameterName: String,
-    deserializer: DeserializationStrategy<T>
-): T? = getQueryParameter(parameterName) ?.fromHex(deserializer)
-
-suspend fun <T> ApplicationCall.uniloadFromQueryOrSendError(
-    parameterName: String,
-    deserializer: DeserializationStrategy<T>
-): T? = uniloadFromQuery(parameterName, deserializer) ?: null.also {
-    respond(HttpStatusCode.BadRequest, "Request query parameters must contains $parameterName")
-}
-
 suspend fun ApplicationCall.getParameterOrSendError(
     field: String
 ) = parameters[field].also {
@@ -58,3 +44,22 @@ suspend fun ApplicationCall.getQueryParameterOrSendError(
         respond(HttpStatusCode.BadRequest, "Request query parameters must contains $field")
     }
 }
+
+fun <T> ApplicationCall.decodeUrlQueryValue(
+    field: String,
+    deserializer: DeserializationStrategy<T>
+) = getQueryParameter(field) ?.let {
+    standardKtorSerialFormat.decodeFromHexString(
+        deserializer,
+        it
+    )
+}
+
+fun <T> ApplicationCall.decodeUrlQueryValueOrSendError(
+    field: String,
+    deserializer: DeserializationStrategy<T>
+) = decodeUrlQueryValue(field, deserializer).also {
+    if (it == null) {
+        respond(HttpStatusCode.BadRequest, "Request query parameters must contains $field")
+    }
+}