ProductResultInfoRetriever.java

/*
 * Copyright (C) 2010 ZXing authors
 * 
 * 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.google.zxing.client.android.result.supplement;

import it.mb.whatshare.R;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.content.Context;
import android.text.Html;
import android.widget.TextView;

import com.google.zxing.client.android.HttpHelper;
import com.google.zxing.client.android.LocaleManager;
import com.google.zxing.client.android.history.HistoryManager;

final class ProductResultInfoRetriever extends SupplementalInfoRetriever {

    private static final Pattern[] PRODUCT_NAME_PRICE_PATTERNS = {
            Pattern.compile(",event\\)\">([^<]+)</a></h3>.+<span class=psrp>([^<]+)</span>"),
            Pattern.compile("owb63p\">([^<]+).+zdi3pb\">([^<]+)"), };

    private final String productID;
    private final String source;
    private final Context context;

    ProductResultInfoRetriever(TextView textView, String productID,
            HistoryManager historyManager, Context context) {
        super(textView, historyManager);
        this.productID = productID;
        this.source = context.getString(R.string.msg_google_product);
        this.context = context;
    }

    @Override
    void retrieveSupplementalInfo() throws IOException {

        String encodedProductID = URLEncoder.encode(productID, "UTF-8");
        String uri = "http://www.google."
                + LocaleManager.getProductSearchCountryTLD(context)
                + "/m/products?ie=utf8&oe=utf8&scoring=p&source=zxing&q="
                + encodedProductID;
        CharSequence content = HttpHelper.downloadViaHttp(uri,
                HttpHelper.ContentType.HTML);

        for (Pattern p : PRODUCT_NAME_PRICE_PATTERNS) {
            Matcher matcher = p.matcher(content);
            if (matcher.find()) {
                append(productID, source,
                        new String[] { unescapeHTML(matcher.group(1)),
                                unescapeHTML(matcher.group(2)) }, uri);
                break;
            }
        }
    }

    private static String unescapeHTML(String raw) {
        return Html.fromHtml(raw).toString();
    }

}