com.wms.opensource.shopfast.task.LoadProductsInCollectionTask.java Source code

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Here is the source code for com.wms.opensource.shopfast.task.LoadProductsInCollectionTask.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.shopfast.task;

import java.io.IOException;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;

import com.shopify.api.resources.Product;
import com.wms.opensource.shopfast.R;
import com.wms.opensource.shopfast.cache.JsonCache;
import com.wms.opensource.shopfast.handler.HandlerMessage;
import com.wms.opensource.shopfast.shopify.JSONProcessor;
import com.wms.opensource.shopfast.shopify.PersistFileNameProvider;
import com.wms.opensource.shopfast.shopify.Constants;
import com.wms.opensource.shopfast.util.DialogUtil;
import com.wms.opensource.shopfast.util.FileUtil;
import com.wms.opensource.shopfast.util.MessageUtil;
import com.wms.opensource.shopfast.util.StorageUtil;

import android.content.Context;
import android.os.AsyncTask;
import android.os.Handler;
import android.util.Base64;
import android.view.View;
import android.widget.ProgressBar;

public class LoadProductsInCollectionTask extends AsyncTask<Integer, Void, Void> {

    private Context context = null;
    private ProgressBar progressBar = null;
    private int collectionID = 0;
    private int page = 1;

    private List<Product> products = null;

    private Handler handler = null;
    private String productsArrayString = null;

    private String errorString = "";

    public LoadProductsInCollectionTask(Context context, Handler handler, ProgressBar progressBar, int page) {
        this.context = context;
        this.handler = handler;
        this.progressBar = progressBar;
        this.page = page;
    }

    protected void onPreExecute() {
        progressBar.setVisibility(View.VISIBLE);
    }

    protected Void doInBackground(Integer... params) { // params[0] is the collection ID
        collectionID = params[0];

        /** Directly use HTTPClient to load products */
        String urlString = "https://" + context.getString(R.string.ShopifyShopName)
                + ".myshopify.com/admin/products.json?collection_id=" + collectionID + "&page=" + page + "&limit="
                + Constants.PRODUCTS_PER_PAGE;
        HttpClient client = new DefaultHttpClient();
        HttpGet get = new HttpGet(urlString);
        try {
            String authentication = context.getString(R.string.ShopifyAPIKey) + ":"
                    + context.getString(R.string.ShopifyPassword);
            byte[] byteArray = authentication.getBytes("UTF-8");
            String base64 = Base64.encodeToString(byteArray, Base64.NO_WRAP);
            get.setHeader("Authorization", "Basic " + base64);
            get.setHeader("User-Agent", "Mozilla/5.0 ( compatible ) ");
            get.setHeader("Accept", "*/*");
            HttpResponse resp = client.execute(get);
            if (resp.getStatusLine().getStatusCode() == 200) {
                HttpEntity entity = resp.getEntity();
                if (entity != null) {
                    String jsonString = EntityUtils.toString(entity);
                    JSONObject productsObject = new JSONObject(jsonString);
                    productsArrayString = productsObject.getString("products");
                    products = JSONProcessor.getProductsFromJSONArrayString(productsArrayString);
                }
            } else {
                errorString = "Error: " + resp.getStatusLine();
            }
        } catch (ClientProtocolException e) {
            errorString = context.getString(R.string.retryOnError);
        } catch (IOException e) {
            errorString = context.getString(R.string.retryOnError);
        } catch (JSONException e) {
            errorString = context.getString(R.string.retryOnError);
        }
        return null;
    }

    protected void onPostExecute(Void result) {
        progressBar.setVisibility(View.INVISIBLE);
        if (products == null) {
            DialogUtil.showExceptionAlertDialog(context, context.getString(R.string.error), errorString);
        } else {
            JsonCache.putProductsJsonOfCollection(collectionID, page, productsArrayString);
            FileUtil.writeStringToFile(productsArrayString, StorageUtil.getTempDirectory(context),
                    PersistFileNameProvider.getProductsFileName(collectionID, page),
                    context.getString(R.string.charSetName));
            MessageUtil.sendHandlerMessage(handler, HandlerMessage.STORE_PRODUCTS_LOADED);
        }
    }

    public List<Product> getProducts() {
        return products;
    }

}