From 37105710ee0b332a3020d4b3220c95b8f4267555 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Wed, 19 Jan 2022 09:31:28 -0500
Subject: Implement JSONHandler for recursively processing JSON

---
 libqpdf/JSON.cc | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

(limited to 'libqpdf/JSON.cc')

diff --git a/libqpdf/JSON.cc b/libqpdf/JSON.cc
index 423c0b0a..af98553e 100644
--- a/libqpdf/JSON.cc
+++ b/libqpdf/JSON.cc
@@ -90,6 +90,7 @@ std::string JSON::JSON_array::unparse(size_t depth) const
 }
 
 JSON::JSON_string::JSON_string(std::string const& utf8) :
+    utf8(utf8),
     encoded(encode_string(utf8))
 {
 }
@@ -311,6 +312,83 @@ JSON::isDictionary() const
         this->m->value.getPointer());
 }
 
+bool
+JSON::getString(std::string& utf8) const
+{
+    auto v = dynamic_cast<JSON_string const*>(this->m->value.getPointer());
+    if (v == nullptr)
+    {
+        return false;
+    }
+    utf8 = v->utf8;
+    return true;
+}
+
+bool
+JSON::getNumber(std::string& value) const
+{
+    auto v = dynamic_cast<JSON_number const*>(this->m->value.getPointer());
+    if (v == nullptr)
+    {
+        return false;
+    }
+    value = v->encoded;
+    return true;
+}
+
+bool
+JSON::getBool(bool& value) const
+{
+    auto v = dynamic_cast<JSON_bool const*>(this->m->value.getPointer());
+    if (v == nullptr)
+    {
+        return false;
+    }
+    value = v->value;
+    return true;
+}
+
+bool
+JSON::isNull() const
+{
+    if (dynamic_cast<JSON_null const*>(this->m->value.getPointer()))
+    {
+        return true;
+    }
+    return false;
+}
+
+bool
+JSON::forEachDictItem(
+    std::function<void(std::string const& key, JSON value)> fn) const
+{
+    auto v = dynamic_cast<JSON_dictionary const*>(this->m->value.getPointer());
+    if (v == nullptr)
+    {
+        return false;
+    }
+    for (auto const& k: v->members)
+    {
+        fn(k.first, JSON(k.second));
+    }
+    return true;
+}
+
+bool
+JSON::forEachArrayItem(std::function<void(JSON value)> fn) const
+{
+    auto v = dynamic_cast<JSON_array const*>(this->m->value.getPointer());
+    if (v == nullptr)
+    {
+        return false;
+    }
+    for (auto const& i: v->elements)
+    {
+        fn(JSON(i));
+    }
+    return true;
+}
+
 bool
 JSON::checkSchema(JSON schema, std::list<std::string>& errors)
 {
-- 
cgit v1.2.3-54-g00ecf