LuaContextManager.cpp

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#include "LuaContextManager.hpp"
 
#include "BAREErrors.hpp"
 
#include "LuaScript.hpp"
 
namespace BARE2D {
 
    LuaContextManager* LuaContextManager::m_instance = nullptr;
 
    LuaContextManager::LuaContextManager()
    {
        // Not much to do here
    }
 
    LuaContextManager::~LuaContextManager()
    {
        // Nor here.
    }
 
    LuaContextManager* LuaContextManager::getInstance()
    {
        if (m_instance == nullptr) {
            m_instance = new LuaContextManager();
        }
        return m_instance;
    }
    
    void LuaContextManager::destroyInstance() {
        if(m_instance) delete m_instance;
    }
 
    void LuaContextManager::update()
    {
        // We need to loop through all of the contexts and update them each. As well, we need to check if any are completed. If they are, remove and destroy them.
        std::vector<unsigned int> completedScripts;
        
        for(auto it : m_contexts) {
            // Update it
            it.second->update();
            if(it.second->isCompleted()) {
                // If it is done, release resources and remove it from the list.
                it.second->destroy();
                completedScripts.push_back(it.first);
            }
        }
        
        for(unsigned int i : completedScripts) {
            delete m_contexts[i];
            m_contexts.erase(i);
        }
    }
 
    void LuaContextManager::addContext(unsigned int id, LuaScriptContextWrapper* context)
    {
        // Just add the pair to the map
        m_contexts.insert(std::make_pair(id, context));
    }
 
    void LuaContextManager::removeContext(unsigned int id)
    {
        // Find the context in the map, delete it, and then remove it from the map
        // Find the context
        auto it = m_contexts.find(id);
        // Check to make sure it exists
        if(it == m_contexts.end()) {
            throwError(BAREError::LUA_FAILURE, "LuaContextManager attempted to remove nonexistent script with ID " + std::to_string(id));
            return;
        }
        
        // The element exists - we need to delete it and remove it from the map
        // delete it
        delete it->second;
        // remove from the map
        m_contexts.erase(it);
        
        // And we're good! Just return.
    }
    
    LuaScriptContextWrapper* LuaContextManager::getContext(unsigned int id) {
        // Find the context
        auto it = m_contexts.find(id);
        // Check to make sure it exists. If it doesn't, return nullptr
        if(it == m_contexts.end()) {
            return nullptr;
        }
        return it->second;
    }
 
}