make the skin renderer less bad (thanks bray)

src/main/java/cc/fascinated/exception/ExceptionControllerAdvice.java

@@ -0,0 +1,45 @@
+package cc.fascinated.exception;
+
+import cc.fascinated.model.response.ErrorResponse;
+import io.micrometer.common.lang.NonNull;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.servlet.resource.NoResourceFoundException;
+
+@ControllerAdvice
+public final class ExceptionControllerAdvice {
+
+    /**
+     * Handle a raised exception.
+     *
+     * @param ex the raised exception
+     * @return the error response
+     */
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<?> handleException(@NonNull Exception ex) {
+        HttpStatus status = null; // Get the HTTP status
+        if (ex instanceof NoResourceFoundException) { // Not found
+            status = HttpStatus.NOT_FOUND;
+        } else if (ex instanceof UnsupportedOperationException) { // Not implemented
+            status = HttpStatus.NOT_IMPLEMENTED;
+        }
+        if (ex.getClass().isAnnotationPresent(ResponseStatus.class)) { // Get from the @ResponseStatus annotation
+            status = ex.getClass().getAnnotation(ResponseStatus.class).value();
+        }
+        String message = ex.getLocalizedMessage(); // Get the error message
+        if (message == null) { // Fallback
+            message = "An internal error has occurred.";
+        }
+        // Print the stack trace if no response status is present
+        if (status == null) {
+            ex.printStackTrace();
+        }
+        if (status == null) { // Fallback to 500
+            status = HttpStatus.INTERNAL_SERVER_ERROR;
+        }
+        return new ResponseEntity<>(new ErrorResponse(status, message), status);
+    }
+}

src/main/java/cc/fascinated/exception/impl/BadRequestException.java

@@ -0,0 +1,12 @@
+package cc.fascinated.exception.impl;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.BAD_REQUEST)
+public class BadRequestException extends RuntimeException {
+
+    public BadRequestException(String message) {
+        super(message);
+    }
+}

src/main/java/cc/fascinated/exception/impl/MojangAPIRateLimitException.java

@@ -0,0 +1,9 @@
+package cc.fascinated.exception.impl;
+
+
+public class MojangAPIRateLimitException extends RateLimitException {
+
+    public MojangAPIRateLimitException() {
+        super("Mojang API rate limit exceeded. Please try again later.");
+    }
+}

src/main/java/cc/fascinated/exception/impl/RateLimitException.java

@@ -0,0 +1,12 @@
+package cc.fascinated.exception.impl;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.TOO_MANY_REQUESTS)
+public class RateLimitException extends RuntimeException {
+
+    public RateLimitException(String message) {
+        super(message);
+    }
+}

src/main/java/cc/fascinated/exception/impl/ResourceNotFoundException.java

@@ -0,0 +1,9 @@
+package cc.fascinated.exception.impl;
+
+import lombok.experimental.StandardException;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@StandardException
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class ResourceNotFoundException extends RuntimeException { }