next.celebs.dao.WikipediaDao.java Source code

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Here is the source code for next.celebs.dao.WikipediaDao.java

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/*
 * Copyright 2011 Vancouver Ywebb Consulting Ltd
 * 
 * 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 next.celebs.dao;

import next.celebs.Log;
import next.celebs.api.ResponseReader;
import next.celebs.api.API.Response;
import next.celebs.di.Context;
import next.celebs.ui.MiscUtils;

import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.URL;

public class WikipediaDao {

    public static void init(String wikiTitle, Context ctx, final Response<String[]> response) {

        String devUrl = "http://127.0.0.1:8888/zz_wiki.html";
        String prodUrl = "http://en.wikipedia.org/w/index.php?action=render&title=" + wikiTitle;

        String url = ctx.isDevMode() ? devUrl : prodUrl;

        getWiki(url, new ResponseReader() {
            @Override
            public void onSuccess(com.google.gwt.http.client.Response resp) {
                String fullText = resp.getText();

                int beginInx = fullText.indexOf("<p>");
                int endInx = fullText.indexOf("<table id=\"toc\"");
                // Window.alert("beginInx=" + beginInx + ", endInx=" + endInx);
                String result = fullText.substring(beginInx, endInx);
                // Window.alert("[" + result + "]");
                result = MiscUtils.filterWiki(result);
                //            result = result.replace("<a ", "<span ");
                //            result = result.replace("</a>", "</span>");
                //            result = result.replace("[", "<!--");
                //            result = result.replace("]", "-->");
                String[] data = new String[] { result, fullText };
                response.read(data);
            }

            @Override
            public String getName() {
                return null;
            }
        });
    }

    public static void getWiki(String url, ResponseReader responseReader) {

        RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, URL.encode(url));
        try {
            builder.sendRequest(null, new Callback_(responseReader));
        } catch (RequestException e) {
            Log.error("RequestException: " + e.getMessage());
            responseReader.onError(null, e);
        }
    }

    private static class Callback_ implements RequestCallback {
        ResponseReader reader;

        public Callback_(ResponseReader reader) {
            this.reader = reader;
        }

        public void onError(Request request, Throwable e) {
            Log.warn("RequestCallback::onError");
            reader.onError(null, e);
        }

        @Override
        public void onResponseReceived(Request request, com.google.gwt.http.client.Response response) {
            if (200 == response.getStatusCode()) {
                reader.onSuccess(response);
            } else {
                Log.warn("RequestCallback::onResponseReceived, not supported status '" + response.getStatusCode()
                        + "'");
                reader.onError(response, null);
            }
        }
    }

}