Java tutorial
/* This file is part of Intake24. Copyright 2015, 2016 Newcastle University. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. This file is based on Intake24 v1.0. Crown copyright, 2012, 2013, 2014 Licensed under the Open Government Licence 3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/ */ package net.scran24.user.client.survey.portionsize.experimental; import static net.scran24.user.client.survey.flat.PromptUtil.withBackLink; import static net.scran24.user.client.survey.flat.PromptUtil.withHeader; import static net.scran24.user.client.survey.portionsize.experimental.PortionSizeScriptUtil.guidePrompt; import static net.scran24.user.client.survey.portionsize.experimental.PortionSizeScriptUtil.yesNoPromptZeroField; import static net.scran24.user.client.survey.portionsize.experimental.PortionSizeScriptUtil.drinkScalePrompt; import static net.scran24.user.client.survey.portionsize.experimental.PortionSizeScriptUtil.done; import net.scran24.user.client.survey.flat.PromptUtil; import net.scran24.user.client.survey.flat.SimplePrompt; import net.scran24.user.client.survey.prompts.messages.PromptMessages; import net.scran24.user.shared.FoodData; import net.scran24.user.shared.lookup.DrinkScaleDef; import net.scran24.user.shared.lookup.DrinkwareDef; import org.pcollections.client.PMap; import org.workcraft.gwt.imagemap.shared.ImageMapDefinition; import org.workcraft.gwt.shared.client.Function1; import org.workcraft.gwt.shared.client.Option; import com.google.gwt.core.shared.GWT; import com.google.gwt.safehtml.shared.SafeHtmlUtils; public class DrinkScaleScript implements PortionSizeScript { public static String name = "drink-scale"; private final DrinkwareDef drinkwareDef; private final ImageMapDefinition guideImage; private final PromptMessages messages = GWT.create(PromptMessages.class); public DrinkScaleScript(ImageMapDefinition guideImage, DrinkwareDef drinkwareDef) { this.guideImage = guideImage; this.drinkwareDef = drinkwareDef; } private DrinkScaleDef getScaleDef(int index) { DrinkScaleDef scale = null; for (DrinkScaleDef d : drinkwareDef.scaleDefs) if (d.choice_id == index) scale = d; if (scale == null) throw new IllegalStateException("No scale definition for container id " + index); return scale; } private Function1<UpdateFunc, UpdateFunc> calcFillVolumeIfSkip = new Function1<UpdateFunc, UpdateFunc>() { @Override public UpdateFunc apply(UpdateFunc argument) { return argument.compose(new UpdateFunc() { @Override public PMap<String, String> apply(PMap<String, String> argument) { int index = Integer.parseInt(argument.get("containerIndex")); double f = Double.parseDouble(argument.get("initial-fill-level")); if (argument.get("skip-fill-level").equals("true")) return argument.plus("fillLevel", Double.toString(f)).plus("servingWeight", Double.toString(getScaleDef(index).calcVolume(f))); else return argument; } }); } }; private Function1<UpdateFunc, UpdateFunc> calcFillVolume = new Function1<UpdateFunc, UpdateFunc>() { @Override public UpdateFunc apply(UpdateFunc argument) { return argument.compose(new UpdateFunc() { @Override public PMap<String, String> apply(PMap<String, String> argument) { int index = Integer.parseInt(argument.get("containerIndex")); double f = Double.parseDouble(argument.get("fillLevel")); return argument.plus("servingWeight", Double.toString(getScaleDef(index).calcVolume(f))); } }); } }; private Function1<UpdateFunc, UpdateFunc> calcLeftoversVolume = new Function1<UpdateFunc, UpdateFunc>() { @Override public UpdateFunc apply(UpdateFunc argument) { return argument.compose(new UpdateFunc() { @Override public PMap<String, String> apply(PMap<String, String> argument) { if (argument.containsKey("leftoversLevel")) { int index = Integer.parseInt(argument.get("containerIndex")); double f = Double.parseDouble(argument.get("leftoversLevel")); return argument.plus("leftoversWeight", Double.toString(getScaleDef(index).calcVolume(f))); } else return argument; } }); } }; @Override public Option<SimplePrompt<UpdateFunc>> nextPrompt(final PMap<String, String> data, FoodData foodData) { String escapedFoodDesc = SafeHtmlUtils.htmlEscape(foodData.description().toLowerCase()); if (!data.containsKey("containerIndex")) { return Option .some(PromptUtil .map(withBackLink( withHeader( guidePrompt( SafeHtmlUtils.fromSafeConstant(messages .drinkScale_containerPromptText(escapedFoodDesc)), guideImage, "containerIndex", "imageUrl"), foodData.description())), calcFillVolumeIfSkip)); } else if (!data.containsKey("fillLevel")) { return Option.some(PromptUtil.map(withBackLink(withHeader( drinkScalePrompt(SafeHtmlUtils.fromSafeConstant(messages.drinkScale_servedPromptText()), getScaleDef(Integer.parseInt(data.get("containerIndex"))), messages.drinkScale_servedLessButtonLabel(), messages.drinkScale_servedMoreButtonLabel(), messages.drinkScale_servedContinueButtonLabel(), 1.0, Double.parseDouble(data.get("initial-fill-level")), "fillLevel"), foodData.description())), calcFillVolume)); } else if (!data.containsKey("leftoversLevel")) { if (!data.containsKey("leftovers")) return Option.some(PromptUtil.map(withBackLink(withHeader(yesNoPromptZeroField( SafeHtmlUtils .fromSafeConstant(messages.drinkScale_leftoversQuestionPromptText(escapedFoodDesc)), messages.yesNoQuestion_defaultYesLabel(), messages.yesNoQuestion_defaultNoLabel(), "leftovers", "leftoversLevel"), foodData.description())), calcLeftoversVolume)); else return Option.some(PromptUtil.map(withBackLink(withHeader(drinkScalePrompt( SafeHtmlUtils.fromSafeConstant(messages.drinkScale_leftPromptText(escapedFoodDesc)), getScaleDef(Integer.parseInt(data.get("containerIndex"))), messages.drinkScale_leftLessButtonLabel(), messages.drinkScale_leftMoreButtonLabel(), messages.drinkScale_leftContinueButtonLabel(), Double.parseDouble(data.get("fillLevel")), Double.parseDouble(data.get("fillLevel")), "leftoversLevel"), foodData.description())), calcLeftoversVolume)); } else return done(); } }