1 files changed, 99 insertions, 0 deletions

@@ -0,0 +1,99 @@
+#include "world.h"
+#include <libxml/parser.h>
+#include <stdexcept>
+#include <cstring>
+#include "consts.h"
+
+inline xmlChar* getProp(xmlNodePtr node, const char* attr)
+{
+  xmlChar* key = xmlGetProp(node, reinterpret_cast<const xmlChar*>(attr));
+  if (key == nullptr)
+  {
+    throw std::invalid_argument("Error parsing world file");
+  }
+
+  return key;
+}
+
+World::World(std::string filename)
+{
+  xmlDocPtr doc = xmlParseFile(filename.c_str());
+  if (doc == nullptr)
+  {
+    throw std::invalid_argument("Cannot find world file");
+  }
+
+  xmlNodePtr top = xmlDocGetRootElement(doc);
+  if (top == nullptr)
+  {
+    throw std::invalid_argument("Error parsing world file");
+  }
+
+  if (xmlStrcmp(top->name, reinterpret_cast<const xmlChar*>("world")))
+  {
+    throw std::invalid_argument("Error parsing world file");
+  }
+
+  xmlChar* key = nullptr;
+
+  key = getProp(top, "startx");
+  startX_ = atoi(reinterpret_cast<char*>(key));
+  xmlFree(key);
+
+  key = getProp(top, "starty");
+  startY_ = atoi(reinterpret_cast<char*>(key));
+  xmlFree(key);
+
+  key = getProp(top, "startmap");
+  startMap_ = atoi(reinterpret_cast<char*>(key));
+  xmlFree(key);
+
+  for (xmlNodePtr node = top->xmlChildrenNode;
+    node != nullptr;
+    node = node->next)
+  {
+    if (!xmlStrcmp(node->name, reinterpret_cast<const xmlChar*>("map")))
+    {
+      key = getProp(node, "id");
+      size_t mapId = atoi(reinterpret_cast<char*>(key));
+      xmlFree(key);
+
+      key = getProp(node, "title");
+      std::string mapTitle(reinterpret_cast<char*>(key));
+      xmlFree(key);
+
+      std::vector<int> mapTiles;
+
+      for (xmlNodePtr mapNode = node->xmlChildrenNode;
+        mapNode != nullptr;
+        mapNode = mapNode->next)
+      {
+        if (!xmlStrcmp(
+          mapNode->name,
+          reinterpret_cast<const xmlChar*>("environment")))
+        {
+          key = xmlNodeGetContent(mapNode);
+
+          mapTiles.clear();
+          mapTiles.push_back(atoi(strtok(reinterpret_cast<char*>(key), ",\n")));
+          for (size_t i = 1; i < (MAP_WIDTH * MAP_HEIGHT); i++)
+          {
+            mapTiles.push_back(atoi(strtok(nullptr, ",\n")));
+          }
+
+          xmlFree(key);
+        }
+      }
+
+      maps_.emplace(
+        std::piecewise_construct,
+        std::forward_as_tuple(mapId),
+        std::forward_as_tuple(
+          mapId,
+          std::move(mapTiles),
+          std::move(mapTitle)));
+    }
+  }
+
+  xmlFreeDoc(doc);
+}