app/src/main/java/de/dhbwloe/campusapp/search/SearchHelper.java

   1 package de.dhbwloe.campusapp.search;
   2
   3 import android.util.Log;
   4
   5 import com.loopj.android.http.AsyncHttpResponseHandler;
   6
   7 import org.jsoup.Jsoup;
   8 import org.jsoup.nodes.Document;
   9
  10 import java.io.UnsupportedEncodingException;
  11 import java.util.List;
  12
  13 import cz.msebera.android.httpclient.Header;
  14 import de.dhbwloe.campusapp.fragments.AppSearchListItem;
  15
  16 /**
  17  * Created by pk910 on 25.01.2016.
  18  */
  19 public abstract class SearchHelper {
  20
  21     protected boolean bRequestRunning = false;
  22     protected boolean bHtmlParser;
  23     protected SearchResultListener oRequestListener = null;
  24
  25     public SearchHelper(boolean htmlparser) {
  26         bHtmlParser = htmlparser;
  27     }
  28
  29     protected void performWebRequest(String keywords) {
  30         AsyncHttpResponseHandler handler = new AsyncHttpResponseHandler() {
  31             @Override
  32             public void onStart() {
  33             }
  34             @Override
  35             public void onSuccess(int statusCode, Header[] headers, byte[] response) {
  36                 boolean parsedHttp = false;
  37                 if(bHtmlParser) {
  38                     try {
  39                         Document document = Jsoup.parse(new String(response));
  40
  41                         parsedHttp = true;
  42                         bRequestRunning = false;
  43                         try {
  44                             List<AppSearchListItem> results = onHtmlDocumentReceived(document);
  45                             oRequestListener.onSearchResultsReceived(results);
  46                         } catch(Exception e) {
  47                             oRequestListener.onSearchFailed(e.getMessage());
  48                         }
  49                     } catch(Exception e) {
  50                     }
  51                 }
  52                 if(!parsedHttp) {
  53                     try {
  54                         List<AppSearchListItem> results = onPlainTextReceived(response);
  55                         oRequestListener.onSearchResultsReceived(results);
  56                     } catch(Exception e) {
  57                         oRequestListener.onSearchFailed(e.getMessage());
  58                     }
  59                 }
  60                 bRequestRunning = false;
  61             }
  62             @Override
  63             public void onFailure(int statusCode, Header[] headers, byte[] errorResponse, Throwable e) {
  64                 String error = null;
  65                 try {
  66                     error = new String(errorResponse, "US-ASCII");
  67                 } catch (Exception e1) {
  68                 }
  69                 Log.i("HTTPClient", "  Error: " + statusCode + " - " + error);
  70                 bRequestRunning = false;
  71                 oRequestListener.onSearchFailed(statusCode + ": " + error);
  72             }
  73             @Override
  74             public void onRetry(int retryNo) {
  75             }
  76         };
  77         processWebRequest(handler, keywords);
  78     }
  79
  80     public void search(String keywords, SearchResultListener resultlistener) {
  81         if(bRequestRunning) {
  82             resultlistener.onSearchFailed("another request is already running!");
  83             return;
  84         }
  85         oRequestListener = resultlistener;
  86         bRequestRunning = true;
  87
  88         performWebRequest(keywords);
  89     }
  90
  91     protected abstract void processWebRequest(AsyncHttpResponseHandler handler, String keywords);
  92     protected abstract List<AppSearchListItem> onHtmlDocumentReceived(Document document);
  93     protected abstract List<AppSearchListItem> onPlainTextReceived(byte[] data);
  94 }