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#include "Globals.h"
#include "BlockTypePalette.h"
#include "json/value.h"
#include "json/reader.h"
BlockTypePalette::BlockTypePalette():
mMaxIndex(0)
{
}
UInt32 BlockTypePalette::index(const AString & aBlockTypeName, const BlockState & aBlockState)
{
auto idx = maybeIndex(aBlockTypeName, aBlockState);
if (idx.second)
{
return idx.first;
}
// Not found, append:
auto index = mMaxIndex++;
mBlockToNumber[aBlockTypeName][aBlockState] = index;
mNumberToBlock[index] = {aBlockTypeName, aBlockState};
return index;
}
std::pair<UInt32, bool> BlockTypePalette::maybeIndex(const AString & aBlockTypeName, const BlockState & aBlockState) const
{
auto itr1 = mBlockToNumber.find(aBlockTypeName);
if (itr1 == mBlockToNumber.end())
{
return {0, false};
}
auto itr2 = itr1->second.find(aBlockState);
if (itr2 == itr1->second.end())
{
return {0, false};
}
return {itr2->second, true};
}
UInt32 BlockTypePalette::count() const
{
return static_cast<UInt32>(mNumberToBlock.size());
}
const std::pair<AString, BlockState> & BlockTypePalette::entry(UInt32 aIndex) const
{
auto itr = mNumberToBlock.find(aIndex);
if (itr == mNumberToBlock.end())
{
throw NoSuchIndexException(aIndex);
}
return itr->second;
}
std::map<UInt32, UInt32> BlockTypePalette::createTransformMapAddMissing(const BlockTypePalette & aFrom)
{
std::map<UInt32, UInt32> res;
for (const auto & fromEntry: aFrom.mNumberToBlock)
{
auto fromIndex = fromEntry.first;
const auto & blockTypeName = fromEntry.second.first;
const auto & blockState = fromEntry.second.second;
res[fromIndex] = index(blockTypeName, blockState);
}
return res;
}
std::map<UInt32, UInt32> BlockTypePalette::createTransformMapWithFallback(const BlockTypePalette & aFrom, UInt32 aFallbackIndex) const
{
std::map<UInt32, UInt32> res;
for (const auto & fromEntry: aFrom.mNumberToBlock)
{
auto fromIndex = fromEntry.first;
const auto & blockTypeName = fromEntry.second.first;
const auto & blockState = fromEntry.second.second;
auto thisIndex = maybeIndex(blockTypeName, blockState);
if (thisIndex.second)
{
// The entry was found in this
res[fromIndex] = thisIndex.first;
}
else
{
// The entry was NOT found in this, replace with fallback:
res[fromIndex] = aFallbackIndex;
}
}
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[]
}
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