Remove a lot of error code and error handling madness.

logic/MMCJson.h

@@ -0,0 +1,46 @@
+/**
+ * Some de-bullshitting for Qt JSON failures.
+ *
+ * Simple exception-throwing
+ */
+
+#pragma once
+#include <QJsonValue>
+#include <QJsonObject>
+#include <QJsonArray>
+#include "MMCError.h"
+
+class JSONValidationError : public MMCError
+{
+public:
+	JSONValidationError(QString cause) : MMCError(cause) {};
+	virtual QString errorName()
+	{
+		return "JSONValidationError";
+	};
+	virtual ~JSONValidationError() {};
+};
+
+namespace MMCJson
+{
+/// make sure the value exists. throw otherwise.
+QJsonValue ensureExists(QJsonValue val, const QString what = "value");
+
+/// make sure the value is converted into an object. throw otherwise.
+QJsonObject ensureObject(const QJsonValue val, const QString what = "value");
+
+/// make sure the value is converted into an array. throw otherwise.
+QJsonArray ensureArray(const QJsonValue val, QString what = "value");
+
+/// make sure the value is converted into a string. throw otherwise.
+QString ensureString(const QJsonValue val, QString what = "value");
+
+/// make sure the value is converted into a boolean. throw otherwise.
+bool ensureBoolean(const QJsonValue val, QString what = "value");
+
+/// make sure the value is converted into an integer. throw otherwise.
+int ensureInteger(const QJsonValue val, QString what = "value");
+
+/// make sure the value is converted into a double precision floating number. throw otherwise.
+double ensureDouble(const QJsonValue val, QString what = "value");
+}