From 44324ba5d6cac01048cc5cbecbff255ee56f2fc0 Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Sat, 14 Mar 2015 16:13:11 -0400
Subject: Wrote simple factory to read map and entity data from XML files

---
 src/entityfactory.cpp | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/entityfactory.cpp

(limited to 'src/entityfactory.cpp')

diff --git a/src/entityfactory.cpp b/src/entityfactory.cpp
new file mode 100644
index 0000000..acf9b8e
--- /dev/null
+++ b/src/entityfactory.cpp
@@ -0,0 +1,101 @@
+#include "entityfactory.h"
+#include <libxml/parser.h>
+#include "components.h"
+#include "muxer.h"
+#include <cstdio>
+
+struct EntityData {
+  char* sprite;
+  char* action;
+  bool hasPhysics;
+  int width;
+  int height;
+};
+
+static std::map<std::string, EntityData> factories;
+
+std::shared_ptr<Entity> EntityFactory::createNamedEntity(const std::string name, const Map& map)
+{
+  auto it = factories.find(name);
+  EntityData data = factories[name];
+  if (it == factories.end())
+  {
+    xmlDocPtr doc = xmlParseFile(("../entities/" + name + ".xml").c_str());
+    if (doc == nullptr)
+    {
+      fprintf(stderr, "Error reading entity %s\n", name.c_str());
+      exit(-1);
+    }
+  
+    xmlNodePtr top = xmlDocGetRootElement(doc);
+    if (top == nullptr)
+    {
+      fprintf(stderr, "Empty entity %s\n", name.c_str());
+      exit(-1);
+    }
+  
+    if (xmlStrcmp(top->name, (const xmlChar*) "entity-def"))
+    {
+      fprintf(stderr, "Invalid entity definition %s\n", name.c_str());
+      exit(-1);
+    }
+  
+    for (xmlNodePtr node = top->xmlChildrenNode; node != NULL; node = node->next)
+    {
+      if (!xmlStrcmp(node->name, (const xmlChar*) "sprite"))
+      {
+        xmlChar* key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+        data.sprite = (char*) calloc(xmlStrlen(key)+1, sizeof(char));
+        strcpy(data.sprite, (char*) key);
+        xmlFree(key);
+      } else if (!xmlStrcmp(node->name, (const xmlChar*) "action"))
+      {
+        xmlChar* key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+        data.action = (char*) calloc(xmlStrlen(key)+1, sizeof(char));
+        strcpy(data.action, (char*) key);
+        xmlFree(key);
+      } else if (!xmlStrcmp(node->name, (const xmlChar*) "size"))
+      {
+        xmlChar* key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
+        data.hasPhysics = true;
+        sscanf((char*) key, "%d,%d", &(data.width), &(data.height));
+        xmlFree(key);
+      }
+    }
+  
+    xmlFreeDoc(doc);
+    
+    factories[name] = data;
+  }
+  
+  auto entity = std::make_shared<Entity>();
+  
+  if (data.sprite)
+  {
+    auto component = std::make_shared<StaticImageComponent>(data.sprite);
+    entity->addComponent(component);
+  }
+  
+  if (data.action)
+  {
+    if (!strcmp(data.action, "save"))
+    {
+      auto component = std::make_shared<SimpleColliderComponent>([&] (Game& game, Entity& collider) {
+        playSound("../res/Pickup_Coin23.wav", 0.25);
+  
+        game.saveGame(map, collider.position);
+      });
+      entity->addComponent(component);
+    }
+  }
+  
+  if (data.hasPhysics)
+  {
+    auto component = std::make_shared<PhysicsBodyComponent>();
+    entity->addComponent(component);
+    
+    entity->size = std::make_pair(data.width, data.height);
+  }
+  
+  return entity;
+}
-- 
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