BobTonyMod/src/main/java/online/bobtony/handlers/DoubleJumpHandler.java

package online.bobtony.handlers;

import net.minecraft.client.network.ClientPlayerEntity;
import net.minecraft.util.math.Vec3d;
import online.bobtony.BobTony;
import online.bobtony.enums.Modes;

public class DoubleJumpHandler {

    public static void handleDoubleJump(ClientPlayerEntity player) {
        boolean isJumping = player.input.playerInput.jump();

        if (isJumping && !BobTony.wasJumping) {
            long currentTime = System.currentTimeMillis();
            if (currentTime - BobTony.lastJumpTime < 300) {
                if(BobTony.mode == Modes.FLY) {
                    toggleFlyMode(player);
                }else {
                    boostPlayer(player);
                }
            }
            BobTony.lastJumpTime = currentTime;
        }

        BobTony.wasJumping = isJumping;
    }

    private static void toggleFlyMode(ClientPlayerEntity player) {
        boolean isFlying = !player.getAbilities().flying;
        player.getAbilities().flying = isFlying;
        player.getAbilities().setFlySpeed(BobTony.flyspeed);

        if (isFlying) {
            BobTony.sendMessage(player, "Fly: §aEnabled", true);
        } else {
            BobTony.sendMessage(player, "Fly: §cDisabled", true);
        }

        player.sendAbilitiesUpdate();
    }

    private static void boostPlayer(ClientPlayerEntity apfel) {
        double pitch = apfel.getPitch();
        Vec3d velocity;

        if (pitch > 70) {
            velocity = new Vec3d(0.0, 1.0, 0.0).multiply(BobTony.strength);
        } else {
            velocity = apfel.getRotationVector().multiply(BobTony.strength);
        }

        apfel.addVelocity(velocity.x, velocity.y + 0.5, velocity.z);
        apfel.velocityModified = true;
    }
}