2021-09-18 11:51:00 +02:00
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//
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// Created by BONNe
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// Copyright - 2021
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//
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package world.bentobox.challenges.panel.util;
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import org.bukkit.Material;
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import org.bukkit.inventory.ItemStack;
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import java.util.ArrayList;
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import java.util.List;
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import world.bentobox.bentobox.api.panels.PanelItem;
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import world.bentobox.bentobox.api.panels.builders.PanelBuilder;
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import world.bentobox.bentobox.api.panels.builders.PanelItemBuilder;
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import world.bentobox.bentobox.api.user.User;
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import world.bentobox.challenges.utils.Constants;
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/**
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* This single abstract class will manage paged selectors similar to CommonPagedPanel.
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*/
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public abstract class PagedSelector<T>
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{
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/**
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* Instantiates a new Paged selector.
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*
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* @param user the user
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*/
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protected PagedSelector(User user)
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{
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this.user = user;
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}
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/**
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* Build.
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*/
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protected abstract void build();
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/**
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* Create element button panel item.
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*
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* @param object the object
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* @return the panel item
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*/
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protected abstract PanelItem createElementButton(T object);
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/**
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* Populate elements.
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*
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* @param panelBuilder the panel builder
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* @param objectList the object list
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*/
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protected void populateElements(PanelBuilder panelBuilder, List<T> objectList)
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{
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final int MAX_ELEMENTS = 21;
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final int size = objectList.size();
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if (this.pageIndex < 0)
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{
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this.pageIndex = size / MAX_ELEMENTS;
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}
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else if (this.pageIndex > (size / MAX_ELEMENTS))
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{
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this.pageIndex = 0;
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}
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int objectIndex = MAX_ELEMENTS * this.pageIndex;
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// I want first row to be only for navigation and return button.
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int index = 10;
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while (objectIndex < ((this.pageIndex + 1) * MAX_ELEMENTS) &&
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objectIndex < size &&
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index < 36)
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{
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if (!panelBuilder.slotOccupied(index))
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{
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panelBuilder.item(index, this.createElementButton(objectList.get(objectIndex++)));
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}
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index++;
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}
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if (size > MAX_ELEMENTS && !(1.0 * size / MAX_ELEMENTS <= this.pageIndex + 1))
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{
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panelBuilder.item(26, this.getButton(CommonButtons.NEXT));
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}
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if (this.pageIndex > 0)
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{
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panelBuilder.item(18, this.getButton(CommonButtons.PREVIOUS));
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}
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}
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/**
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* This method returns PanelItem that represents given Button.
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* @param button Button that must be returned.
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* @return PanelItem with requested functionality.
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*/
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protected PanelItem getButton(CommonButtons button)
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{
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final String reference = Constants.BUTTON + button.name().toLowerCase() + ".";
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final String name = this.user.getTranslation(reference + "name");
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final List<String> description = new ArrayList<>(3);
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ItemStack icon;
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PanelItem.ClickHandler clickHandler;
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if (button == CommonButtons.NEXT)
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{
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description.add(this.user.getTranslation(reference + "description",
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2021-09-19 20:04:09 +02:00
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Constants.PARAMETER_NUMBER, String.valueOf(this.pageIndex + 2)));
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2021-09-18 11:51:00 +02:00
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icon = new ItemStack(Material.OAK_SIGN, this.pageIndex + 2);
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clickHandler = (panel, user, clickType, slot) ->
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{
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this.pageIndex++;
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this.build();
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return true;
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};
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}
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else if (button == CommonButtons.PREVIOUS)
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{
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description.add(this.user.getTranslation(reference + "description",
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2021-09-19 20:04:09 +02:00
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Constants.PARAMETER_NUMBER, String.valueOf(this.pageIndex)));
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2021-09-18 11:51:00 +02:00
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icon = new ItemStack(Material.OAK_SIGN, Math.max(1, this.pageIndex));
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clickHandler = (panel, user, clickType, slot) ->
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{
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this.pageIndex--;
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this.build();
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return true;
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};
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}
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else
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{
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icon = new ItemStack(Material.PAPER);
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clickHandler = null;
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}
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return new PanelItemBuilder().
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icon(icon).
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name(name).
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description(description).
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clickHandler(clickHandler).
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build();
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}
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/**
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* Next and Previous Buttons.
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*/
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private enum CommonButtons
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{
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NEXT,
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PREVIOUS
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}
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/**
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* Current page index.
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*/
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private int pageIndex;
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/**
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* User who opens gui.
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*/
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protected final User user;
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}
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