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// LuaChunkStay.cpp
// Implements the cLuaChunkStay class representing a cChunkStay binding for plugins, used by cWorld:ChunkStay() Lua API
#include "Globals.h"
#include "LuaChunkStay.h"
#include "PluginLua.h"
cLuaChunkStay::cLuaChunkStay() {}
bool cLuaChunkStay::AddChunks(const cLuaState::cStackTable & a_ChunkCoordsTable)
{
// This function is expected to be called just once, with all the coords in a table
ASSERT(m_Chunks.empty());
// Add each set of coords:
a_ChunkCoordsTable.ForEachArrayElement(
[=](cLuaState & a_LuaState, int a_Index)
{
if (!lua_istable(a_LuaState, -1))
{
LOGWARNING(
"%s: Element #%d is not a table (got %s). Ignoring the element.",
__FUNCTION__,
a_Index,
lua_typename(a_LuaState, -1)
);
a_LuaState.LogStackTrace();
lua_pop(a_LuaState, 1);
return false;
}
AddChunkCoord(a_LuaState, a_Index);
return false;
}
);
// If there are no chunks, log a warning and return failure:
if (m_Chunks.empty())
{
LOGWARNING("%s: No valid chunk coords.", __FUNCTION__);
a_ChunkCoordsTable.GetLuaState().LogStackTrace();
return false;
}
// All ok
return true;
}
void cLuaChunkStay::AddChunkCoord(cLuaState & L, int a_Index)
{
// Check that the element has 2 coords:
int NumCoords = luaL_getn(L, -1);
if (NumCoords != 2)
{
LOGWARNING(
"%s: Element #%d doesn't contain 2 coords (got %d). Ignoring the element.",
__FUNCTION__,
a_Index,
NumCoords
);
return;
}
// Read the two coords from the element:
lua_rawgeti(L, -1, 1);
lua_rawgeti(L, -2, 2);
int ChunkX = luaL_checkint(L, -2);
int ChunkZ = luaL_checkint(L, -1);
lua_pop(L, 2);
// Check that a coord is not yet present:
for (cChunkCoordsVector::iterator itr = m_Chunks.begin(), end = m_Chunks.end(); itr != end; ++itr)
{
if ((itr->m_ChunkX == ChunkX) && (itr->m_ChunkZ == ChunkZ))
{
LOGWARNING("%s: Element #%d is a duplicate, ignoring it.", __FUNCTION__, a_Index);
return;
}
} // for itr - m_Chunks[]
m_Chunks.emplace_back(ChunkX, ChunkZ);
}
void cLuaChunkStay::Enable(
cChunkMap & a_ChunkMap,
cLuaState::cCallbackPtr a_OnChunkAvailable,
cLuaState::cCallbackPtr a_OnAllChunksAvailable
)
{
m_OnChunkAvailable = std::move(a_OnChunkAvailable);
m_OnAllChunksAvailable = std::move(a_OnAllChunksAvailable);
// Enable the ChunkStay:
Super::Enable(a_ChunkMap);
}
void cLuaChunkStay::OnChunkAvailable(int a_ChunkX, int a_ChunkZ)
{
if (m_OnChunkAvailable != nullptr)
{
m_OnChunkAvailable->Call(a_ChunkX, a_ChunkZ);
}
}
bool cLuaChunkStay::OnAllChunksAvailable(void)
{
if (m_OnAllChunksAvailable != nullptr)
{
// Call the callback:
m_OnAllChunksAvailable->Call();
// Remove the callback references - they won't be needed anymore
m_OnChunkAvailable.reset();
m_OnAllChunksAvailable.reset();
}
// Disable the ChunkStay by returning true
return true;
}
void cLuaChunkStay::OnDisabled(void)
{
// This object is no longer needed, delete it
delete this;
}
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