net.scran24.user.client.survey.prompts.ConfirmTimeGapPrompt.java Source code

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Here is the source code for net.scran24.user.client.survey.prompts.ConfirmTimeGapPrompt.java

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/*
This file is part of Intake24.
    
 Crown copyright, 2012, 2013, 2014.
    
This software is licensed under the Open Government Licence 3.0:
    
http://www.nationalarchives.gov.uk/doc/open-government-licence/
*/

package net.scran24.user.client.survey.prompts;

import org.workcraft.gwt.shared.client.Callback1;
import org.workcraft.gwt.shared.client.Function1;

import com.google.gwt.core.shared.GWT;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;

import net.scran24.user.client.survey.SurveyStageInterface;
import net.scran24.user.client.survey.flat.Prompt;
import net.scran24.user.client.survey.flat.Survey;
import net.scran24.user.client.survey.flat.SurveyOperation;
import net.scran24.user.client.survey.prompts.messages.PromptMessages;
import net.scran24.user.shared.Meal;

public class ConfirmTimeGapPrompt implements Prompt<Survey, SurveyOperation> {

    public static interface TimeGap {
        public static interface Visitor<T> {
            public T visitBeforeMeal(int mealIndex);

            public T visitAfterMeal(int mealIndex);

            public T visitBetweenMeals(int mealIndex1, int mealIndex2);
        }

        public static class AfterMeal implements TimeGap {
            public final int mealIndex;

            public AfterMeal(int mealIndex) {
                this.mealIndex = mealIndex;
            }

            @Override
            public <T> T accept(Visitor<T> visitor) {
                return visitor.visitAfterMeal(mealIndex);
            }
        }

        public static class BeforeMeal implements TimeGap {
            public final int mealIndex;

            public BeforeMeal(int mealIndex) {
                this.mealIndex = mealIndex;
            }

            @Override
            public <T> T accept(Visitor<T> visitor) {
                return visitor.visitBeforeMeal(mealIndex);
            }
        }

        public static class BetweenMeals implements TimeGap {
            public final int mealIndex1;
            public final int mealIndex2;

            public BetweenMeals(int mealIndex1, int mealIndex2) {
                this.mealIndex1 = mealIndex1;
                this.mealIndex2 = mealIndex2;
            }

            @Override
            public <T> T accept(Visitor<T> visitor) {
                return visitor.visitBetweenMeals(mealIndex1, mealIndex2);
            }
        }

        public <T> T accept(Visitor<T> visitor);
    }

    private final PromptMessages messages = GWT.create(PromptMessages.class);
    private final TimeGap gap;
    private Survey survey;

    public ConfirmTimeGapPrompt(Survey survey, TimeGap gap) {
        this.survey = survey;
        this.gap = gap;
    }

    @Override
    public SurveyStageInterface getInterface(final Callback1<SurveyOperation> onComplete,
            final Callback1<Function1<Survey, Survey>> onIntermediateStateChange) {

        FlowPanel content = new FlowPanel();

        final SafeHtml promptText = gap.accept(new TimeGap.Visitor<SafeHtml>() {
            @Override
            public SafeHtml visitBeforeMeal(int mealIndex) {
                Meal meal = survey.meals.get(mealIndex);
                return SafeHtmlUtils.fromSafeConstant(messages
                        .timeGap_promptText_beforeMeal(meal.name.toLowerCase(), meal.time.getOrDie().toString()));
            }

            @Override
            public SafeHtml visitAfterMeal(int mealIndex) {
                Meal meal = survey.meals.get(mealIndex);
                return SafeHtmlUtils.fromSafeConstant(messages.timeGap_promptText_afterMeal(meal.name.toLowerCase(),
                        meal.time.getOrDie().toString()));
            }

            @Override
            public SafeHtml visitBetweenMeals(int mealIndex1, int mealIndex2) {
                Meal meal1 = survey.meals.get(mealIndex1);
                Meal meal2 = survey.meals.get(mealIndex2);
                return SafeHtmlUtils.fromSafeConstant(messages.timeGap_promptText_betweenMeals(
                        meal1.name.toLowerCase(), meal1.time.getOrDie().toString(), meal2.name.toLowerCase(),
                        meal2.time.getOrDie().toString()));
            }
        });

        content.add(new YesNoQuestion(promptText, messages.timeGap_addMealButtonLabel(),
                messages.timeGap_confirmTimeGapButtonLabel(), new YesNoQuestion.ResultHandler() {
                    @Override
                    public void handleYes() {
                        onComplete.call(SurveyOperation.addMealRequest(0));
                    }

                    @Override
                    public void handleNo() {
                        onComplete.call(SurveyOperation.update(new Function1<Survey, Survey>() {
                            @Override
                            public Survey apply(final Survey argument) {
                                return gap.accept(new TimeGap.Visitor<Survey>() {
                                    @Override
                                    public Survey visitBeforeMeal(int mealIndex) {
                                        return argument.updateMeal(mealIndex,
                                                argument.meals.get(mealIndex).markNoMealsBefore());
                                    }

                                    @Override
                                    public Survey visitAfterMeal(int mealIndex) {
                                        return argument.updateMeal(mealIndex,
                                                argument.meals.get(mealIndex).markNoMealsAfter());
                                    }

                                    @Override
                                    public Survey visitBetweenMeals(int mealIndex1, int mealIndex2) {
                                        return argument
                                                .updateMeal(mealIndex1,
                                                        argument.meals.get(mealIndex1).markNoMealsAfter())
                                                .updateMeal(mealIndex2,
                                                        argument.meals.get(mealIndex2).markNoMealsBefore());
                                    }
                                });
                            }
                        }, true));
                    }
                }));

        return new SurveyStageInterface.Aligned(content, HasHorizontalAlignment.ALIGN_LEFT,
                HasVerticalAlignment.ALIGN_TOP, SurveyStageInterface.DEFAULT_OPTIONS);
    }

    @Override
    public String toString() {
        return "Confirm survey completion prompt";
    }
}