[F] Fix error reporting

src/main/java/ext/Ext.kt

@@ -1,5 +1,6 @@
 package ext
 
+import icu.samnyan.aqua.net.utils.ApiException
 import io.ktor.client.*
 import io.ktor.client.engine.cio.*
 import io.ktor.client.plugins.contentnegotiation.*
@@ -19,8 +20,8 @@ typealias Str = String
 typealias Bool = Boolean
 
 // Make it easier to throw a ResponseStatusException
-operator fun HttpStatus.invoke(message: String? = null): Nothing = throw ResponseStatusException(this, message ?: this.reasonPhrase)
-operator fun Int.compareTo(message: String): Int = throw ResponseStatusException(HttpStatus.valueOf(this), message)
+operator fun HttpStatus.invoke(message: String? = null): Nothing = throw ApiException(value(), message ?: this.reasonPhrase)
+operator fun Int.compareTo(message: String): Int = throw ApiException(this, message)
 
 // Email validation
 // https://www.baeldung.com/java-email-validation-regex

src/main/java/icu/samnyan/aqua/net/utils/ErrorResponse.kt

@@ -0,0 +1,17 @@
+package icu.samnyan.aqua.net.utils
+
+import ext.Str
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.ControllerAdvice
+import org.springframework.web.bind.annotation.ExceptionHandler
+
+class ApiException(val code: Int, message: Str) : RuntimeException(message)
+
+@ControllerAdvice
+class GlobalExceptionHandler {
+    @ExceptionHandler(ApiException::class)
+    fun handleCustomApiException(e: ApiException): ResponseEntity<Any?> {
+        // On error, return the error code and message
+        return ResponseEntity.status(e.code).body(e.message)
+    }
+}