fixes of todos

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

@@ -2,12 +2,12 @@ package com.insanusmokrassar.postssystem.ktor.server
 
 import com.insanusmokrassar.postssystem.ktor.standardKtorSerialFormat
 import io.ktor.application.ApplicationCall
+import io.ktor.application.call
 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>,
@@ -26,6 +26,23 @@ suspend fun <T> ApplicationCall.uniload(
     request.receiveChannel().toByteArray()
 )
 
+fun <T> ApplicationCall.uniloadFromQuery(
+    parameterName: String,
+    deserializer: DeserializationStrategy<T>
+): T? {
+    return standardKtorSerialFormat.decodeFromHexString(
+        deserializer,
+        getQueryParameter(parameterName) ?: return null
+    )
+}
+
+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 {
@@ -34,10 +51,14 @@ suspend fun ApplicationCall.getParameterOrSendError(
     }
 }
 
+fun ApplicationCall.getQueryParameter(
+    field: String
+) = request.queryParameters[field]
+
 suspend fun ApplicationCall.getQueryParameterOrSendError(
     field: String
-) = request.queryParameters[field].also {
+) = getQueryParameter(field).also {
     if (it == null) {
-        respond(HttpStatusCode.BadRequest, "Request query parametersmust contains $field")
+        respond(HttpStatusCode.BadRequest, "Request query parameters must contains $field")
     }
 }