FunnelItemsVM.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2022 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.web.funnel.model;
 
import java.io.StringWriter;
import java.io.Writer;
import java.util.Collections;
import java.util.List;
import org.turro.elephant.db.ElephantPU;
import org.turro.elephant.entities.web.WebGoal;
import org.turro.elephant.entities.web.WebItem;
import org.turro.elephant.util.Messages;
import org.turro.elephant.util.Toasts;
import org.turro.elephant.web.actions.WebActionType;
import org.turro.elephant.entities.web.WebItemType;
import org.turro.i18n.I_;
import org.turro.jpa.Dao;
import org.turro.sql.SqlClause;
import org.turro.string.Strings;
import org.turro.util.Cached;
import org.turro.web.funnel.graph.FunnelGraph;
import org.turro.web.funnel.graph.FunnelGraphDOT;
import org.turro.zkoss.dialog.DialogField;
import org.turro.zkoss.dialog.Dialogs;
import org.zkoss.bind.BindUtils;
import org.zkoss.bind.annotation.BindingParam;
import org.zkoss.bind.annotation.NotifyChange;
import org.zkoss.zk.ui.Executions;
import org.zkoss.zul.Textbox;
 
public class FunnelItemsVM {
 
  public WebItem getSelected() {
    return selected;
  }
 
  public void setSelected(WebItem selected) {
    this.selected = selected;
    this.behaveAs = FunnelGraph.behaveAs(selected);
    BindUtils.postNotifyChange(null, null, FunnelItemsVM.this, 
            "selected", "behaveString", "showForm", "nextsModel");
  }
 
  public String getBehaveString() {
    if(selected == null || behaveAs == null) return "wrong";
    if(selected.getType().equals(behaveAs)) return "equal";
    if(WebItemType.CHAIN.equals(behaveAs)) return "wrong";
    return behaveAs.toString();
  }
  
  public String getGraphDOT() {
    Writer writer = new StringWriter();
    FunnelGraphDOT.DOT(writer);
    return writer.toString();
  }
  
  public boolean isShowForm() {
    return selected != null;
  }
  
  public void addItem() {
    Dialogs.title(I_.get("Add"))
          .width("400px")
          .height("250px")
          .addField(DialogField.field("WebTag"))
          .addField(DialogField.field("Type").onEditor(() -> {
            WebItemTypeListbox wit = new WebItemTypeListbox();
            wit.setMold("select");
            wit.setObjectValue(WebItemType.TARGET);
            return wit;
          }))
          .onOk((dialogs) -> {
            String webTag = dialogs.<Textbox>getEditor("WebTag").getValue();
            if(notInModel(webTag)) {
              WebItem wi = new WebItem();
              wi.setWebTag(webTag);
              wi.setType(dialogs.<WebItemTypeListbox>getEditor("Type").getObjectValue());
              if(wi.isValid()) {
                model.add(wi);
                selected = wi;
                BindUtils.postNotifyChange(null, null, FunnelItemsVM.this, 
                        "model", "selected", "showForm");
              } else {
                Toasts.message("WebTags should not include spaces or punctuation characters.").show();
              }
            } else {
              Toasts.message("WebTag already in the model.").show();
            }
          })
          .emptyCancel()
          .show();
  }
  
  @NotifyChange({"model", "selected", "showForm"})
  public void save() {
    model.stream().filter(wi -> wi.isEmpty() && !wi.isNew())
            .forEach(wi -> dao.get().deleteEntity(wi));
    model.removeIf(wi -> wi.isEmpty());
    model.forEach(wi -> wi.compose());
    dao.get().saveEntities(model);
    Executions.getCurrent().sendRedirect(null);
  }
  
  @NotifyChange({"selected", "nextsModel"})
  public void addNext(@BindingParam("next") WebItem item) {
    selected.getNexts().add(item);
  }
  
  @NotifyChange({"selected", "goalsModel"})
  public void addGoal(@BindingParam("goal") WebGoal goal) {
    selected.getGoals().add(goal);
  }
  
  public void addExt() {
    Dialogs.title(I_.get("Add external"))
          .width("400px")
          .height("300px")
          .addField(DialogField.field("Type")
                  .help("https://www.turro.org/docs/elephant/components/webactions")
                  .onEditor(() -> {
            WebActionTypeListbox wat = new WebActionTypeListbox();
            wat.setMold("select");
            wat.setObjectValue(WebActionType.NAVIGATE);
            return wat;
          }))
          .addField(DialogField.field("Value"))
          .addField(DialogField.field("Icon"))
          .onOk((dialogs) -> {
            WebActionType type = dialogs.<WebActionTypeListbox>getEditor("Type").getObjectValue();
            String value = dialogs.<Textbox>getEditor("Value").getValue();
            String image = dialogs.<Textbox>getEditor("Icon").getValue();
            if(type != null && !Strings.isBlank(value)) {
              selected.getExternals().add(type.getProtocol() + ":" + value + 
                      (Strings.isBlank(image) ? "" : "{" + image + "}"));
              BindUtils.postNotifyChange(null, null, FunnelItemsVM.this, 
                          "selected");
            }
          })
          .emptyCancel()
          .show();
  }
  
  public void delete() {
    Messages.confirmDeletion().add(selected.getItemLabel()).show(() -> {
      dao.get().deleteObject(selected);
      Executions.getCurrent().sendRedirect(null);
    });
  }
  
  public void deleteNext(@BindingParam("next") WebItem item) {
    Messages.confirmDeletion().add(item.getItemLabel()).show(() -> {
      selected.getNexts().remove(item);
      BindUtils.postNotifyChange(null, null, FunnelItemsVM.this, 
              "model", "selected");
    });
  }
 
  public void deleteGoal(@BindingParam("goal") WebGoal goal) {
    Messages.confirmDeletion().add(goal.getItemLabel()).show(() -> {
      selected.getGoals().remove(goal);
      BindUtils.postNotifyChange(null, null, FunnelItemsVM.this, 
              "model", "selected");
    });
  }
  
  public void deleteExt(@BindingParam("ext") String item) {
    Messages.confirmDeletion().add(item).show(() -> {
      selected.getExternals().remove(item);
      BindUtils.postNotifyChange(null, null, FunnelItemsVM.this, 
              "selected");
    });
  }
 
  /* Utils */
  
  private boolean notInModel(String webTag) {
    return !getModel().stream().anyMatch(wi -> wi.getWebTag().equals(webTag));
  }
  
  private List<WebItemType> getPossibleNextTypes() {
    if(behaveAs == null) return Collections.EMPTY_LIST;
    return switch(behaveAs) {
      case TARGET -> List.of(WebItemType.SOLUTION, WebItemType.CHAIN);
      case SOLUTION -> List.of(WebItemType.SERVICE, WebItemType.CHAIN);
      case SERVICE -> List.of(WebItemType.CHAIN);
      default -> Collections.EMPTY_LIST;
    };
  }
 
  /* Models */
  
  private WebItem selected;
  private WebItemType behaveAs;
  
  private List<WebItem> model;
  
  public List<WebItem> getModel() {
    if(model == null) {
      model = SqlClause.select("wi").from("WebItem wi")
              .orderBy("type, ordering, webTag")
              .dao(dao.get())
              .resultList(WebItem.class);
    }
    return model;
  }
  
  public List<WebItem> getNextsModel() {
    if(selected == null) return Collections.EMPTY_LIST;
    return SqlClause.select("wi").from("WebItem wi")
            .where().in("type", getPossibleNextTypes())
            .and().notEqual("webTag", selected.getWebTag())
            .and().notIn("webTag", selected.getNexts().stream().map(wi -> wi.getWebTag()).toList())
            .dao(dao.get())
            .resultList(WebItem.class);
  }
  
  public List<WebGoal> getGoalsModel() {
    if(selected == null) return Collections.EMPTY_LIST;
    return SqlClause.select("wg").from("WebGoal wg")
            .where().notIn("goalAction", selected.getGoals().stream().map(wi -> wi.getGoalAction()).toList())
            .dao(dao.get())
            .resultList(WebGoal.class);
  }
  
  /* Dao */
  
  private final Cached<Dao> dao = Cached.instance(() -> new ElephantPU());
 
}