Adds file type detection, and beefs up error states for file uploads

src/main/kotlin/net/halfbinary/scavengerhuntapi/error/ExceptionHandler.kt

@@ -1,5 +1,6 @@
 package net.halfbinary.scavengerhuntapi.error
 
+import net.halfbinary.scavengerhuntapi.error.exception.BadFileException
 import net.halfbinary.scavengerhuntapi.error.exception.InvalidEmailException
 import net.halfbinary.scavengerhuntapi.error.exception.LoginFailedException
 import net.halfbinary.scavengerhuntapi.error.exception.NotFoundException
@@ -12,6 +13,8 @@ import org.springframework.web.bind.MethodArgumentNotValidException
 import org.springframework.web.bind.annotation.ExceptionHandler
 import org.springframework.web.bind.annotation.ResponseStatus
 import org.springframework.web.bind.annotation.RestControllerAdvice
+import org.springframework.web.multipart.MaxUploadSizeExceededException
+import java.net.SocketTimeoutException
 
 
 @RestControllerAdvice
@@ -68,6 +71,24 @@ class ExceptionHandler {
         }
     }
 
+    @ExceptionHandler(BadFileException::class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    fun badFileException(e: BadFileException): String? {
+        return e.message
+    }
+
+    @ExceptionHandler(MaxUploadSizeExceededException::class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    fun maxUploadSizeExceededException(e: MaxUploadSizeExceededException): String? {
+        return e.message
+    }
+
+    @ExceptionHandler(SocketTimeoutException::class)
+    @ResponseStatus(HttpStatus.SERVICE_UNAVAILABLE)
+    fun socketTimeoutException(): String {
+        return "Unable to connect. Try again later."
+    }
+
     private fun simpleMap(key: String, value: String?): Map<String, String?> {
         return mapOf(Pair(key, value))
     }