WikihowWebsiteWrapper.java

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package instruction.wrapper;

import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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;

public class WikihowWebsiteWrapper implements IHowtoWebsiteWrapper {
        
        String title = "";
        List<String> instructions = new ArrayList<String>();
        String url = null;

        public String getHowtoTitle() {
                return title;
        }

        public List<String> getInstructions() {
                return instructions;
        }


        public void load( String query ) {
                
                String[] howto = search_wikihow( query );
                
                this.url = howto[0];
                this.title = howto[1];
                
                instructions = read(url);
        }

        public String getUrl() {
                return url;
        }

        

        public String[] search_wikihow( String query ) {

                String url = "http://www.wikihow.com/Special:LSearch?search=" + query.replaceAll(" ", "\\+");

                try {

                        HttpClient httpclient = new DefaultHttpClient();
                        HttpGet httpget = new HttpGet(url);
                        
                        String page = EntityUtils.toString(httpclient.execute(httpget).getEntity());
                        String[] rows = page.split("\n");
                        
                        
                        String[] res = new String[2];
                        for ( int i = 0; i < rows.length; i++ ) {
                                
                                String p = "(<div class='searchresult_1'><a href=\"([a-zA-Z:./_\\-]*)\">([a-zA-Z <>/]*)</a>)";
                                Matcher matcher = Pattern.compile(p).matcher(rows[i]);
                                
                                if(matcher.find()) {
                                        
                                        res[0] = matcher.group(2);
                                        res[1] = matcher.group(3).replaceAll("<[a-zA-z0-9/]*>", "");

                                        return res;
                                }
                        }
                }
                catch ( Exception e ) {
                        e.printStackTrace();
                }
                return null;
        }

        
        public ArrayList<String> read(String url) {

                ArrayList<String> res = new ArrayList<String>();
                try {
                        HttpClient httpclient = new DefaultHttpClient();
                        HttpGet httpget = new HttpGet(url);
                        
                        String page = EntityUtils.toString(httpclient.execute(httpget).getEntity());
                        String[] rows = page.split("\n");
                
                        System.out.println("Steps:");
                        for ( int i = 0; i < rows.length; i++ ) {

                                Matcher matcher = Pattern.compile("(<b class='whb'>([0-9A-Za-z \\._]*)</b>\\.)").matcher(rows[i]);
                                
                                if(matcher.find()) {

                                        res.add(matcher.group(2));
                                }
                        }       
                }
                catch ( Exception e ) {
                        e.printStackTrace();
                }
                return res;
        }
        
}