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#include <cstdlib>
#include <pugixml.hpp>
#include "XMLParser.h"
#include "Exception.h"
#include "Parser.h"
#include "TileData.h"
using namespace std;
XMLParser XMLParser::instance {};
XMLParser::XMLParser() {
Parser::register_strategy(this);
}
unsigned int XMLParser::heuristic(FileStrategy & f) {
const string content = f.read();
int open_backets = 0;
int close_brackets = 0;
for (char c : content) {
if (c == '<') open_backets++;
if (c == '>') close_brackets++;
}
int balance = abs(open_backets - close_brackets);
int penalty = 1 + balance * 10;
return (open_backets + close_brackets) / penalty;
}
void XMLParser::parse(FileStrategy & f, Deserializer & d) {
using namespace pugi;
const string content = f.read();
xml_document doc;
xml_parse_result result = doc.load_string(content.c_str());
if (!result)
throw Exception("parsing XML failed");
xml_node canvas = doc.child("canvas");
if (!canvas)
throw Exception("missing <canvas>");
d.set_canvas({
.rows = canvas.attribute("rows").as_uint(),
.columns = canvas.attribute("cols").as_uint(),
});
xml_node node_types = canvas.child("nodeTypes");
if (!node_types)
throw Exception("missing <nodeTypes>");
for (xml_node node_type : node_types) {
d.add_type(
node_type.attribute("tag").as_string(),
{
.red = node_type.attribute("red").as_uint(),
.green = node_type.attribute("green").as_uint(),
.blue = node_type.attribute("blue").as_uint(),
},
node_type.attribute("weight").as_int()
);
}
xml_node nodes = canvas.child("nodes");
if (!nodes)
throw Exception("missing <nodes>");
for (xml_node node : nodes) {
d.set_tile({
.x = node.attribute("x").as_uint(),
.y = node.attribute("y").as_uint(),
.type = node.name(),
});
}
}
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