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package ftbsc.lll.mapper.impl;

import com.google.auto.service.AutoService;
import ftbsc.lll.exceptions.MalformedMappingsException;
import ftbsc.lll.mapper.AbstractMapper;
import ftbsc.lll.mapper.IMapper;
import ftbsc.lll.mapper.tools.data.ClassData;

import java.util.ArrayList;
import java.util.List;

/**
 * A {@link IMapper} capable of parsing TSRG (an intermediary
 * format used by Forge) files.
 */

@AutoService(IMapper.class)
public class TSRGMapper extends AbstractMapper {

   /**
    * Checks whether this mapper can process the given lines.
    * @param lines the lines to read
    * @return whether this type of mapper can process these lines
    */
   @Override
   public boolean claim(List<String> lines) {
      return lines.get(0).startsWith("tsrg2 left right");
   }

   /**
    * Reads the given lines of text and attempts to interpret them as
    * mappings of the given type.
    * @param lines the lines to read
    * @param ignoreErrors try to ignore errors and keep going
    * @throws MalformedMappingsException if an error is encountered and ignoreErrors is false
    */
   @Override
   protected void processLines(List<String> lines, boolean ignoreErrors) throws MalformedMappingsException {
      //skip the first line ("tsrg2 left right")
      lines = new ArrayList<>(lines);
      lines.remove(0);

      String currentClass = "";
      for(String l : lines) {
         if(l == null) continue;
         if(l.startsWith("\t") || l.startsWith(" ")) {
            String[] split = l.trim().split(" ");
            if(split.length == 2) //field
               this.mappings.get(currentClass).addField(split[0], split[1]);
            else if (split.length == 3)//method
               this.mappings.get(currentClass).addMethod(split[0], split[2], split[1]); //add child
         } else {
            String[] sp = l.split(" ");
            ClassData s = new ClassData(sp[0], sp[1]);
            currentClass = s.name;
            this.mappings.put(s.name, s);
         }
      }
   }
}