AK: Let's put the JSON parsing in a separate class.

AK/JsonParser.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include <AK/JsonValue.h>
+
+namespace AK {
+
+class JsonParser {
+public:
+    explicit JsonParser(const StringView& input)
+        : m_input(input)
+    {
+    }
+    ~JsonParser()
+    {
+    }
+
+    JsonValue parse();
+
+private:
+    char peek() const;
+    char consume();
+    void consume_whitespace();
+    void consume_specific(char expected_ch);
+    void consume_string(const char*);
+    String consume_quoted_string();
+    JsonValue parse_array();
+    JsonValue parse_object();
+    JsonValue parse_number();
+    JsonValue parse_string();
+    JsonValue parse_false();
+    JsonValue parse_true();
+    JsonValue parse_null();
+    JsonValue parse_undefined();
+
+    template<typename C>
+    void consume_while(C);
+
+    template<typename C>
+    String extract_while(C);
+
+    StringView m_input;
+    int m_index { 0 };
+};
+
+}
+
+using AK::JsonParser;