minecraft-kajetans-mod/src/main/java/me/km/snuviscript/CodeFunction.java

package me.km.snuviscript;

import me.km.KajetansMod;
import me.km.exception.PrescriptException;
import me.km.exception.NoSuchMethodException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.stream.Collectors;

public class CodeFunction 
{
    private int function;
    private Object[] pars;
    
    public CodeFunction(String code)
    {
        function = 0;
        findFunction(code);
    }
    
    private void findFunction(String c)
    {
        //System.out.println(c);
        if(c.equals("")) // Springt in { } ohne Kopf
        {
            function = KajetansMod.scripts.getQuestParser().translateMethod("godeeper");
            pars = new Object[0];
            return;
        }
        int pos = c.indexOf("(");
        if(pos == -1)
        {
            throw new PrescriptException("Falsche Syntax bei: "  + c);
        }
        try
        {
            function = KajetansMod.scripts.getQuestParser().translateMethod(c.substring(0, pos).trim().toLowerCase());
        }
        catch(NullPointerException ex)
        {
            throw new NoSuchMethodException(c.substring(0, pos).trim());
        }
        pos++;
        
        ArrayList<Object> pars = new ArrayList<>();
        int last = pos;
        int counter = 1;
        boolean string = false;
        while(pos < c.length())
        {
            if(string)
            {              
                if(c.charAt(pos) == '"')
                {
                    string = !string;
                }
                pos++;
                continue;
            }
            switch(c.charAt(pos))
            {
                case '"':
                    string = !string;
                    break;
                case ',':
                    if(last != pos)
                    {
                        pars.add(ScriptUtils.convertInput(c.substring(last, pos).trim()));
                    }
                    last = pos + 1;
                    break;
                case ')':
                    if(counter <= 0)
                    {
                        throw new PrescriptException(") ohne (");
                    }
                    if(last != pos)
                    {
                        pars.add(ScriptUtils.convertInput(c.substring(last, pos).trim()));
                    }
                    break;
                case '(':
                    counter++;
                    pos++;
                    while(counter != 1 && pos < c.length())
                    {
                        switch(c.charAt(pos))
                        {
                            case '(':
                                counter++;
                                break;
                            case ')':
                                counter--;
                                break;    
                        }
                        pos++;
                    }
                    pars.add(new CodeFunction(c.substring(last, pos).trim())); 
                    while(pos < c.length() && c.charAt(pos) != ',' && c.charAt(pos) != ')')
                    {
                        pos++;
                    }
                    last = pos + 1;
                    break;
            }  
            pos++;
        }   
        this.pars = pars.toArray(new Object[pars.size()]);
    }
    
    public int getFunction()
    {
        return function;
    }
    
    public Object[] getParameters()
    {
        return pars;
    }

    @Override
    public String toString() 
    {
        return function + "(" + Arrays.asList(pars).stream().map(o -> String.valueOf(o)).collect(Collectors.joining(", ")) + ")";
    }
}