com.wms.opensource.images3android.task.LoadImagePlantTask.java Source code

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Here is the source code for com.wms.opensource.images3android.task.LoadImagePlantTask.java

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/*
 * Copyright 2015 Waterloo Mobile Studio
 *
 * 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.wms.opensource.images3android.task;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.wms.opensource.images3android.R;
import com.wms.opensource.images3android.cache.ImageCache;
import com.wms.opensource.images3android.handler.HandlerMessage;
import com.wms.opensource.images3android.images3.ImageS3Service;
import com.wms.opensource.images3android.images3.entity.ImageCollection;
import com.wms.opensource.images3android.images3.entity.ImagePlant;
import com.wms.opensource.images3android.util.DialogUtil;
import com.wms.opensource.images3android.util.FileUtil;
import com.wms.opensource.images3android.util.JsonUtil;
import com.wms.opensource.images3android.util.MessageUtil;
import com.wms.opensource.images3android.util.PersistFileNameUtil;
import com.wms.opensource.images3android.util.StorageUtil;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Handler;

public class LoadImagePlantTask extends AsyncTask<String, Void, String> {

    private Context context = null;
    private Handler handler = null;

    private boolean shouldAutoRun = false;
    private int savedImageCount = -1;

    private ProgressDialog progressDialog = null;
    private ImagePlant imagePlant = null;
    private ImageCollection firstPageImageCollection = null;

    public LoadImagePlantTask(Context context, Handler handler, boolean shouldAutoRun, int savedImageCount) {
        this.context = context;
        this.handler = handler;
        this.shouldAutoRun = shouldAutoRun;
        this.savedImageCount = savedImageCount;
    }

    protected void onPreExecute() {
        if (!shouldAutoRun) {
            progressDialog = DialogUtil.showWaitingProgressDialog(context, ProgressDialog.STYLE_SPINNER,
                    context.getString(R.string.loadingImages), false);
        }
    }

    @Override
    protected String doInBackground(String... params) {
        // params[0] is service url and params[1] is image plant id
        String imagePlantString = ImageS3Service.retrieveImagePlant(params[0], params[1]);
        if (imagePlantString != null) {
            FileUtil.writeStringToFile(imagePlantString, StorageUtil.getTempDirectory(context),
                    PersistFileNameUtil.getImagePlantPersistFileName(params[1]),
                    context.getString(R.string.charSetName));
            try {
                imagePlant = (ImagePlant) JsonUtil.deserialize(imagePlantString, "", ImagePlant.class);

                // Get templates of this image plant
                String templateCollectionString = ImageS3Service.retrieveTemplateCollection(params[0], params[1]);
                if (templateCollectionString != null) {
                    FileUtil.writeStringToFile(templateCollectionString, StorageUtil.getTempDirectory(context),
                            PersistFileNameUtil.getTemplateCollectionFileName(params[1]),
                            context.getString(R.string.charSetName));
                }

                if (imagePlant.getNumberOfImages() > 0) {
                    // Load the first page if there are any images
                    String firstPageImageCollectionString = ImageS3Service.retrieveImages(params[0], params[1], "");
                    if (firstPageImageCollectionString != null) {
                        FileUtil.writeStringToFile(firstPageImageCollectionString,
                                StorageUtil.getTempDirectory(context),
                                PersistFileNameUtil.getImagesPersistFileName(params[1], 1),
                                context.getString(R.string.charSetName));

                        firstPageImageCollection = (ImageCollection) JsonUtil
                                .deserialize(firstPageImageCollectionString, "", ImageCollection.class);

                        // Keep in cache. 
                        ImageCache.putImageCollection(1, firstPageImageCollection);
                    }
                }
            } catch (JsonParseException e) {

            } catch (JsonMappingException e) {

            } catch (IOException e) {

            }
            return imagePlantString;
        }
        return null;
    }

    protected void onPostExecute(String result) {
        if (progressDialog != null && progressDialog.isShowing() == true) {
            progressDialog.dismiss();
        }

        if (result == null) {
            DialogUtil.showExceptionAlertDialog(context, context.getString(R.string.loadImagePlantFailedTitle),
                    context.getString(R.string.loadImagePlantFailed));
        } else {
            if (shouldAutoRun) {
                if (imagePlant.getNumberOfImages() != savedImageCount) {
                    MessageUtil.sendHandlerMessage(handler, HandlerMessage.IMAGES_COUNT_LOADED_ASK_FOR_RELOADING);
                }
            } else {
                MessageUtil.sendHandlerMessage(handler, HandlerMessage.IMAGES_COUNT_LOADED);
            }
        }

    }

    public ImagePlant getImagePlant() {
        return imagePlant;
    }

    public int getImagesCount() {
        return imagePlant.getNumberOfImages();
    }

    public String getSecondPageToken() {
        if (firstPageImageCollection != null) {
            return firstPageImageCollection.getPage().getNext();
        } else {
            return "";
        }
    }

}