First work on EntityFileWriter for saving levels

include/Engine/Core/EntityFileParser.h

@@ -1,3 +1,6 @@
+#ifndef EntityFileParser_h__
+#define EntityFileParser_h__
+
 #include "EntityFile.h"
 #include "World.h"
 
@@ -21,3 +24,5 @@ private:
     void onStartComponentField(EntityID entity, std::string componentType, std::string fieldName, std::map<std::string, std::string> attributes);
     void onFieldData(EntityID entity, std::string componentType, std::string fieldName, const char* fieldData);
 };
+
+#endif

include/Engine/Core/EntityFilePreprocessor.h

@@ -1,3 +1,6 @@
+#ifndef EntityFilePreprocessor_h__
+#define EntityFilePreprocessor_h__
+
 #include <xercesc/framework/psvi/XSElementDeclaration.hpp>
 #include <xercesc/framework/psvi/XSComplexTypeDefinition.hpp>
 #include <xercesc/framework/psvi/XSParticle.hpp>
@@ -29,3 +32,5 @@ private:
     void parseComponentInfo();
     void parseDefaults();
 };
+
+#endif

include/Engine/Core/EntityFileWriter.h

@@ -0,0 +1,38 @@
+#ifndef EntityFileWriter_h__
+#define EntityFileWriter_h__
+
+#include <boost/filesystem.hpp>
+#include <xercesc/dom/DOM.hpp>
+#include <xercesc/util/XMLString.hpp>
+#include <xercesc/util/PlatformUtils.hpp>
+#include <xercesc/framework/StdOutFormatTarget.hpp>
+
+#include "Util/XercesString.h"
+#include "EntityFile.h"
+#include "World.h"
+
+class EntityFileWriter
+{
+public:
+    EntityFileWriter(boost::filesystem::path file)
+        : m_FilePath(file)
+    {
+        using namespace xercesc;
+        m_DOMImplementation = DOMImplementationRegistry::getDOMImplementation(XS::ToXMLCh("LS"));
+        m_DOMLSSerializer = static_cast<DOMImplementationLS*>(m_DOMImplementation)->createLSSerializer();
+        m_DOMLSSerializer->getDomConfig()->setParameter(XMLUni::fgDOMWRTDiscardDefaultContent, true);
+        m_DOMLSSerializer->getDomConfig()->setParameter(XMLUni::fgDOMWRTFormatPrettyPrint, true);
+    }
+
+    void WriteWorld(World* world);
+
+private:
+    boost::filesystem::path m_FilePath;
+    xercesc::DOMImplementation* m_DOMImplementation;
+    xercesc::DOMLSSerializer* m_DOMLSSerializer;
+
+    void appendEntityChildren(xercesc::DOMElement* parentElement, const World* world, EntityID entity);
+    void appentEntityComponents(xercesc::DOMElement* parentElemetn, const World* world, EntityID entity);
+};
+
+#endif

include/Engine/Core/World.h

@@ -22,7 +22,7 @@ public:
     // Attach a component to an entity and fill it with default values
     ComponentWrapper AttachComponent(EntityID entity, std::string componentType);
     // Check if an entity has a component
-    bool HasComponent(EntityID entity, std::string componentType);
+    bool HasComponent(EntityID entity, std::string componentType) const;
     // Get a component of an entity
     ComponentWrapper GetComponent(EntityID entity, std::string componentType);
     // Delete a component off an entity

src/Engine/Core/EntityFileWriter.cpp

@@ -0,0 +1,121 @@
+#include "Core/EntityFileWriter.h"
+
+#define X(str) XS::ToXMLCh(str)
+
+void EntityFileWriter::WriteWorld(World* world)
+{
+    using namespace xercesc;
+    DOMDocument* doc = m_DOMImplementation->createDocument(nullptr, X("Entity"), nullptr);
+    DOMElement* root = doc->getDocumentElement();
+    root->setAttribute(X("xmlns:xsi"), X("http://www.w3.org/2001/XMLSchema-instance"));
+    root->setAttribute(X("xsi:noNamespaceSchemaLocation"), X("../Types/Entity.xsd"));
+    root->setAttribute(X("xmlns:c"), X("components"));
+    
+    DOMElement* componentsElement = doc->createElement(X("Components"));
+    root->appendChild(componentsElement);
+    appentEntityComponents(componentsElement, world, 0);
+
+    DOMElement* childrenElement = doc->createElement(X("Children"));
+    root->appendChild(childrenElement);
+    appendEntityChildren(childrenElement, world, 0);
+
+    XMLFormatTarget* target = new StdOutFormatTarget();
+    DOMLSOutput* output = static_cast<DOMImplementationLS*>(m_DOMImplementation)->createLSOutput();
+    output->setByteStream(target);
+    m_DOMLSSerializer->write(doc, output);
+}
+
+void EntityFileWriter::appendEntityChildren(xercesc::DOMElement* parentElement, const World* world, EntityID entity)
+{
+    using namespace xercesc;
+    DOMDocument* doc = parentElement->getOwnerDocument();
+
+    auto childrenRange = world->GetEntityChildren().equal_range(entity);
+    for (auto it = childrenRange.first; it != childrenRange.second; ++it) {
+        EntityID childEntity = it->second;
+
+        DOMElement* entityElement = doc->createElement(X("Entity"));
+        parentElement->appendChild(entityElement);
+
+        DOMElement* componentsElement = doc->createElement(X("Components"));
+        entityElement->appendChild(componentsElement);
+        appentEntityComponents(componentsElement, world, childEntity);
+
+        DOMElement* childrenElement = doc->createElement(X("Children"));
+        entityElement->appendChild(childrenElement);
+        appendEntityChildren(childrenElement, world, childEntity);
+    }
+}
+
+void EntityFileWriter::appentEntityComponents(xercesc::DOMElement* parentElement, const World* world, EntityID entity)
+{
+    using namespace xercesc;
+    DOMDocument* doc = parentElement->getOwnerDocument();
+    auto& componentPools = world->GetComponentPools();
+
+    // Step through all component pools to get an entity's components
+    // HACK: This is sloooow.
+    for (auto& kv : componentPools) {
+        const std::string& componentName = kv.first;
+        if (!world->HasComponent(entity, componentName)) {
+            continue;
+        }
+        std::string qualifiedComponentName = "c:" + componentName;
+        DOMElement* componentElement = doc->createElement(X(qualifiedComponentName));
+        parentElement->appendChild(componentElement);
+        ComponentWrapper c = kv.second->GetByEntity(entity);
+        for (auto& kv : c.Info.FieldTypes) {
+            std::string fieldName = kv.first;
+            std::string fieldType = kv.second;
+            std::size_t fieldOffset = c.Info.FieldOffsets.at(fieldName);
+
+            // Ignore fields that are equal to the default
+            // HACK: This is probably sloooooow, but it's okay.
+            if (memcmp(c.Data + fieldOffset, c.Info.Defaults.get() + fieldOffset, EntityFile::GetTypeStride(fieldType)) == 0) {
+                continue;
+            }
+
+            DOMElement* fieldElement = doc->createElement(X(fieldName));
+            componentElement->appendChild(fieldElement);
+
+            if (fieldType == "Vector") {
+                const glm::vec3& vec = c[fieldName];
+                fieldElement->setAttribute(X("X"), X(boost::lexical_cast<std::string>(vec.x)));
+                fieldElement->setAttribute(X("Y"), X(boost::lexical_cast<std::string>(vec.y)));
+                fieldElement->setAttribute(X("Z"), X(boost::lexical_cast<std::string>(vec.z)));
+            } else if (fieldType == "Color") {
+                const glm::vec4& vec = c[fieldName];
+                fieldElement->setAttribute(X("R"), X(boost::lexical_cast<std::string>(vec.r)));
+                fieldElement->setAttribute(X("G"), X(boost::lexical_cast<std::string>(vec.g)));
+                fieldElement->setAttribute(X("B"), X(boost::lexical_cast<std::string>(vec.b)));
+                fieldElement->setAttribute(X("A"), X(boost::lexical_cast<std::string>(vec.a)));
+            } else if (fieldType == "Quaternion") {
+                const glm::quat& q = c[fieldName];
+                fieldElement->setAttribute(X("X"), X(boost::lexical_cast<std::string>(q.x)));
+                fieldElement->setAttribute(X("Y"), X(boost::lexical_cast<std::string>(q.y)));
+                fieldElement->setAttribute(X("Z"), X(boost::lexical_cast<std::string>(q.z)));
+                fieldElement->setAttribute(X("W"), X(boost::lexical_cast<std::string>(q.w)));
+            } else if (fieldType == "int") {
+                const int& value = c[fieldName];
+                fieldElement->appendChild(doc->createTextNode(X(boost::lexical_cast<std::string>(value))));
+            } else if (fieldType == "float") {
+                const float& value = c[fieldName];
+                fieldElement->appendChild(doc->createTextNode(X(boost::lexical_cast<std::string>(value))));
+            } else if (fieldType == "double") {
+                const double& value = c[fieldName];
+                fieldElement->appendChild(doc->createTextNode(X(boost::lexical_cast<std::string>(value))));
+            } else if (fieldType == "bool") {
+                const bool& value = c[fieldName];
+                if (value) {
+                    fieldElement->appendChild(doc->createTextNode(X("true")));
+                } else {
+                    fieldElement->appendChild(doc->createTextNode(X("false")));
+                }
+            } else if (fieldType == "string") {
+                const std::string& value = c[fieldName];
+                fieldElement->appendChild(doc->createTextNode(X(value)));
+            }
+        }
+    }
+}
+

src/Engine/Core/World.cpp

@@ -68,7 +68,7 @@ ComponentWrapper World::AttachComponent(EntityID entity, std::string componentTy
 }
 
 
-bool World::HasComponent(EntityID entity, std::string componentType)
+bool World::HasComponent(EntityID entity, std::string componentType) const
 {
     ComponentPool* pool = m_ComponentPools.at(componentType);
     return pool->KnowsEntity(entity);

src/Game/Game.cpp

@@ -2,6 +2,7 @@
 #include "Collision/TriggerSystem.h"
 #include "Collision/CollisionSystem.h"
 #include "Game/HealthSystem.h"
+#include "Core/EntityFileWriter.h"
 
 Game::Game(int argc, char* argv[])
 {
@@ -53,6 +54,9 @@ Game::Game(int argc, char* argv[])
         fpp.RegisterComponents(m_World);
         EntityFileParser fp(file);
         fp.MergeEntities(m_World);
+
+        EntityFileWriter writer("Testasdasdasd.xml");
+        writer.WriteWorld(m_World);
     }
 
     // Create system pipeline