Util: Add JSON Job class

This class holds the to parse string and has a helper for printing error
messages.

src/util/json/job.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef JSON_JOB_H
+#define JSON_JOB_H
+
+#include <cstddef> // size_t
+#include <string>
+
+#include "util/json/lexer.h"
+
+namespace Json {
+
+class Job {
+public:
+	Job(const std::string& input);
+	virtual ~Job();
+
+	enum class Color {
+		None,
+		Info,
+		Warn,
+		Danger,
+		Success,
+		Comment,
+	};
+
+	void printErrorLine(Token token, const char* message);
+
+	void setLineNumbersWidth(size_t width) { m_lineNumbersWidth = width; }
+
+	const std::string& input() { return m_input; }
+
+private:
+	std::string m_input;
+	size_t m_lineNumbersWidth { 0 };
+};
+
+} // namespace Json
+
+#endif // JSON_JOB_H