1 files changed, 82 insertions, 0 deletions
diff --git a/src/BlockTypePalette.cpp b/src/BlockTypePalette.cpp
index f0f54b7c1..92269db9d 100644
--- a/src/BlockTypePalette.cpp
+++ b/src/BlockTypePalette.cpp
@@ -1,5 +1,8 @@
 #include "Globals.h"
 #include "BlockTypePalette.h"
+#include "json/value.h"
+#include "json/reader.h"
+
 
 
 
@@ -113,3 +116,82 @@ std::map<UInt32, UInt32> BlockTypePalette::createTransformMapWithFallback(const
 	}
 	return res;
 }
+
+
+
+
+
+void BlockTypePalette::loadFromString(const AString & aString)
+{
+	// TODO: Detect format (Json vs Lua)
+	return loadFromJsonString(aString);
+}
+
+
+
+
+
+void BlockTypePalette::loadFromJsonString(const AString & aJsonPalette)
+{
+	// Parse the string into JSON object:
+	Json::Value root;
+	Json::CharReaderBuilder builder;
+	std::unique_ptr<Json::CharReader> reader(builder.newCharReader());
+	std::string errs;
+	if (!reader->parse(aJsonPalette.data(), aJsonPalette.data() + aJsonPalette.size(), &root, &errs))
+	{
+		throw LoadFailedException(errs);
+	}
+
+	// Check the JSON's metadata + version:
+	if (!root.isObject() ||
+		!root.isMember("Metadata") ||
+		!root["Metadata"].isMember("ProtocolBlockTypePaletteVersion") ||
+		!root.isMember("Palette") ||
+		!root["Palette"].isArray())
+	{
+		throw LoadFailedException("Incorrect palette format, wrong or missing metadata.");
+	}
+	auto version = root["Metadata"]["ProtocolBlockTypePaletteVersion"].asUInt();
+	if (version != 1)
+	{
+		throw(Printf("Palette format version %d not supported.", version));
+	}
+
+	// Load the palette:
+	auto len = root["Palette"].size();
+	for (decltype(len) i = 0; i < len; ++i)
+	{
+		const auto & record = root["Palette"][i];
+		if (!record.isObject())
+		{
+			throw LoadFailedException(Printf("Palette record #%u is not a JSON object.", i));
+		}
+
+		auto blockTypeName = record["name"].asString();
+		auto id = static_cast<UInt32>(std::stoul(record["id"].asString()));
+		std::map<AString, AString> state;
+
+		if (record.isMember("props"))
+		{
+			const auto & props = record["props"];
+			if (!props.isObject())
+			{
+				throw LoadFailedException(Printf("Palette record #%u: \"props\" value is not a JSON object.", i));
+			}
+			for (const auto & key: props.getMemberNames())
+			{
+				state[key] = props[key].asString();
+			}
+		}
+		BlockState blockState(state);
+
+		// Insert / update in the maps:
+		mNumberToBlock[id] = {blockTypeName, blockState};
+		mBlockToNumber[blockTypeName][blockState] = id;
+		if (id > mMaxIndex)
+		{
+			mMaxIndex = id;
+		}
+	}  // for i - Palette[]
+}