Added internal server error exception

Author: retrodaredevil

couchdb/src/main/java/me/retrodaredevil/couchdbjava/CouchDbStatusCode.java

@@ -15,4 +15,5 @@ private CouchDbStatusCode() {
 	public static final int NOT_FOUND = 404;
 	public static final int UPDATE_CONFLICT = 409;
 	public static final int PRECONDITION_FAILED = 412;
+	public static final int INTERNAL_SERVER_ERROR = 500;
 }

couchdb/src/main/java/me/retrodaredevil/couchdbjava/exception/CouchDbInternalServerErrorException.java

@@ -0,0 +1,27 @@
+package me.retrodaredevil.couchdbjava.exception;
+
+import me.retrodaredevil.couchdbjava.CouchDbStatusCode;
+import me.retrodaredevil.couchdbjava.response.ErrorResponse;
+import org.jetbrains.annotations.Nullable;
+
+public class CouchDbInternalServerErrorException extends CouchDbCodeException {
+	public CouchDbInternalServerErrorException(@Nullable ErrorResponse errorResponse) {
+		super(CouchDbStatusCode.INTERNAL_SERVER_ERROR, errorResponse);
+	}
+
+	public CouchDbInternalServerErrorException(String message, @Nullable ErrorResponse errorResponse) {
+		super(message, CouchDbStatusCode.INTERNAL_SERVER_ERROR, errorResponse);
+	}
+
+	public CouchDbInternalServerErrorException(String message, Throwable cause, @Nullable ErrorResponse errorResponse) {
+		super(message, cause, CouchDbStatusCode.INTERNAL_SERVER_ERROR, errorResponse);
+	}
+
+	public CouchDbInternalServerErrorException(Throwable cause, @Nullable ErrorResponse errorResponse) {
+		super(cause, CouchDbStatusCode.INTERNAL_SERVER_ERROR, errorResponse);
+	}
+
+	public CouchDbInternalServerErrorException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace, @Nullable ErrorResponse errorResponse) {
+		super(message, cause, enableSuppression, writableStackTrace, CouchDbStatusCode.INTERNAL_SERVER_ERROR, errorResponse);
+	}
+}

couchdb/src/main/java/me/retrodaredevil/couchdbjava/okhttp/util/OkHttpUtil.java

@@ -73,6 +73,7 @@ private static CouchDbException createException(ErrorResponse error, int code) {
 		if (error != null) {
 			additionalString = " error: " + error.getError() + " reason: " + error.getReason();
 		}
+		// https://docs.couchdb.org/en/stable/api/basics.html#http-status-codes
 		switch(code) {
 			case CouchDbStatusCode.NOT_MODIFIED:
 				return new CouchDbNotModifiedException("Not modified!" + additionalString, error);
@@ -84,6 +85,8 @@ private static CouchDbException createException(ErrorResponse error, int code) {
 				return new CouchDbUpdateConflictException("Update conflict!" + additionalString, error);
 			case CouchDbStatusCode.BAD_REQUEST:
 				return new CouchDbBadRequestException("Bad request!" + additionalString, error);
+			case CouchDbStatusCode.INTERNAL_SERVER_ERROR:
+				return new CouchDbInternalServerErrorException("Internal server error!" + additionalString, error);
 		}
 		return new CouchDbCodeException("Unknown status code! code: " + code + additionalString, code, error);
 	}