ContentIcons.java

package mmc.plugin;

import arc.struct.ObjectMap;
import arc.struct.Seq;
import arc.util.Strings;
import mindustry.Vars;
import mindustry.ctype.ContentType;
import mindustry.ctype.MappableContent;
import mindustry.gen.Iconc;

import java.lang.reflect.Field;
/**Text icon mapping*/
public class ContentIcons {
    private final static ObjectMap<ContentType, ObjectMap<MappableContent, Character>> iconMap = new ObjectMap<>();

    static Iconc iconc = new Iconc();
    static Seq<Field> iconcFields = Seq.with(Iconc.class.getFields());

    public static char icon(MappableContent content) {
        return iconMap.get(content.getContentType(), () -> {
            return createFor(content.getContentType());
        }).get(content,' ');
    }

    private static ObjectMap<MappableContent, Character> createFor(ContentType type) {
        ObjectMap<MappableContent, Character> charMap = new ObjectMap<>();
        Seq<MappableContent> contents = Vars.content.getBy(type).select(c -> c instanceof MappableContent).<MappableContent>as();
        for (MappableContent content : contents) {
            addIcon(content, charMap, getPrefix(type));
        }
        return charMap;
    }

    private static void addIcon(MappableContent content, ObjectMap<MappableContent, Character> map, String prefix) {
        String localizedName = Strings.kebabToCamel(prefix + content.name);
        Field field1 = iconcFields.find(field -> field.getName().equals(localizedName));
        try {
            Object o = field1.get(iconc);
            if (o == null) {
                o = "";
            }
            map.put(content, o.toString().charAt(0));
        } catch (NullPointerException | IllegalAccessException ignored) {
        }
    }

    private static String getPrefix(ContentType type) {
        return type.name() + "-";
    }
}