TutorialLesson.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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.
 */

package com.android.talkback.tutorial;

import android.content.Context;
import com.android.utils.JsonUtils;
import com.android.utils.ResourceUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class TutorialLesson {

    private static final String JSON_KEY_VERSION = "version";
    private static final String JSON_KEY_TITLE = "title";
    private static final String JSON_KEY_SHORT_DESCRIPTION = "short_description";
    private static final String JSON_KEY_PAGES = "pages";
    private static final String JSON_KEY_PRACTICE = "practice";
    private static final String JSON_KEY_INDEX = "lesson_index";

    private String mTitle;
    private String mShortDescription;
    private TutorialLessonPage[] mPages;
    private int mVersion;
    private int mLessonIndex;

    public TutorialLesson(Context context, JSONObject lesson) throws JSONException {
        String titleResourceName = JsonUtils.getString(lesson, JSON_KEY_TITLE);
        mTitle = ResourceUtils.readStringByResourceIdFromString(context, titleResourceName);
        String descriptionResourceName = JsonUtils.getString(lesson, JSON_KEY_SHORT_DESCRIPTION);
        mShortDescription = ResourceUtils.readStringByResourceIdFromString(context,
                descriptionResourceName);
        mVersion = JsonUtils.getInt(lesson, JSON_KEY_VERSION);
        mLessonIndex = JsonUtils.getInt(lesson, JSON_KEY_INDEX);

        JSONArray pagesArray = JsonUtils.getJsonArray(lesson, JSON_KEY_PAGES);
        JSONObject practice = JsonUtils.getJsonObject(lesson, JSON_KEY_PRACTICE);
        int pageCount = 0;
        if (pagesArray != null) {
            pageCount += pagesArray.length();
        }

        if (practice != null) {
            pageCount++;
        }

        mPages = new TutorialLessonPage[pageCount];

        if (pagesArray != null) {
            int lessonPagesCount = pagesArray.length();
            for (int i = 0; i < lessonPagesCount; i++) {
                JSONObject pageJson = pagesArray.getJSONObject(i);
                mPages[i] = new TutorialLessonPage(context, pageJson);
            }
        }

        if (practice != null) {
            mPages[pageCount - 1] = new TutorialLessonPage(context, practice);
        }
    }

    public void setTitle(String title) {
        mTitle = title;
    }

    public String getTitle() {
        return mTitle;
    }

    public void setShortDescription(String description) {
        mShortDescription = description;
    }

    public String getShortDescription() {
        return mShortDescription;
    }

    public void setTutorialLessonPages(TutorialLessonPage[] pages) {
        mPages = pages;
    }

    public TutorialLessonPage getLessonPage(int pageIndex) {
        return mPages[pageIndex];
    }

    public int getPracticePage() {
        return Math.max(0, mPages.length - 1);
    }

    public int getPagesCount() {
        return mPages.length;
    }

    public int getLessonIndex() {
        return mLessonIndex;
    }
}