minecraft-kajetans-mod/src/main/java/me/km/networking/StatusDisplayGui.java

package me.km.networking;

import com.mojang.blaze3d.matrix.MatrixStack;
import java.util.Collection;
import java.util.LinkedList;
import java.util.TreeMap;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.AbstractGui;
import net.minecraft.potion.EffectInstance;
import net.minecraft.util.text.TextFormatting;
import net.minecraft.util.text.LanguageMap;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class StatusDisplayGui extends AbstractGui {
    public final static StatusDisplayGui INSTANCE = new StatusDisplayGui(Minecraft.getInstance());

    private class LineData implements Comparable<LineData> {
        private int time;
        private final String text;

        public LineData(int time, String text) {
            this.time = time;
            int index = text.indexOf('#');
            if(index != -1) {
                this.text = text.substring(0, index)
                        + LanguageMap.getInstance().getOrDefault(text.substring(index + 1));
            } else {
                this.text = text;
            }
        }

        public String getText() {
            return text;
        }

        public String getTimeText() {
            if(time == Integer.MAX_VALUE) {
                return "";
            }
            return (time / 20) + "s ";
        }

        public int getTimeWidth() {
            return time == Integer.MAX_VALUE ? 0 : mc.font.width(getTimeText());
        }

        public int getTextWidth() {
            return mc.font.width(getText());
        }

        @Override
        public int compareTo(LineData o) {
            return -Integer.compare(time, o.time);
        }
    }

    private final TreeMap<Integer, LineData> strings;
    private final Minecraft mc;

    public StatusDisplayGui(Minecraft mc) {
        this.mc = mc;
        this.strings = new TreeMap<>();
    }

    public void tick() {
        strings.entrySet().removeIf(e -> {
            if(e.getValue().time < Integer.MAX_VALUE) {
                e.getValue().time--;
                if(e.getValue().time < 0) {
                    return true;
                }
            }
            return false;
        });
    }

    public void add(int i, int time, String s) {
        strings.put(i, new LineData(time, s));
    }

    public void remove(int i) {
        strings.remove(i);
    }

    public void clear() {
        strings.clear();
    }

    public void paint(MatrixStack matrixStack) {
        Collection<EffectInstance> collection = this.mc.player.getActiveEffects();
        if(strings.isEmpty() && collection.isEmpty()) {
            return;
        }
        // getting data
        LinkedList<LineData> list = new LinkedList<>(strings.values());
        collection.forEach(effect -> {
            StringBuilder sb = new StringBuilder();
            if(effect.getEffect().isBeneficial()) {
                sb.append(TextFormatting.GREEN);
            } else {
                sb.append(TextFormatting.RED);
            }
            sb.append(LanguageMap.getInstance().getOrDefault(effect.getDescriptionId()));
            list.add(new LineData(effect.getDuration(), sb.toString()));
        });
        // sorting by time
        list.sort(null);

        int lineHeight = mc.font.lineHeight;
        int height = 4 + lineHeight * (strings.size() + collection.size());

        int maxTextWidth = 0;
        int maxTimeWidth = 0;

        for(LineData data : list) {
            maxTextWidth = Math.max(data.getTextWidth(), maxTextWidth);
            maxTimeWidth = Math.max(data.getTimeWidth(), maxTimeWidth);
        }

        int screenWidth = mc.getWindow().getGuiScaledWidth();

        int x = screenWidth - maxTextWidth - maxTimeWidth - 4;
        int y = 2;

        fill(matrixStack, x, 0, screenWidth, height, 1342177280);

        x += 2;
        String time;

        for(LineData data : list) {
            time = data.getTimeText();
            mc.font.draw(matrixStack, time + data.getText(), x + maxTimeWidth - mc.font.width(time),
                    y + 1, 0xFFFFFF);
            y += lineHeight;
        }
    }
}