Android Open Source - Team7-301Project Browse Controller

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License

The source code is released under:
Apache License
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Java Source Code

package ca.ualberta.cs.controllers;
/*from   www . j  a  v a2  s  .co  m*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;




import org.apache.http.client.ClientProtocolException;

import ca.ualberta.cs.models.DataManager;
import ca.ualberta.cs.models.ForumEntry;
import ca.ualberta.cs.models.ForumEntryList;
import ca.ualberta.cs.models.Question;
import ca.ualberta.cs.views.BrowseActivity;
import ca.ualberta.cs.views.Observer;

/**
 * Controls the data in the model of the BrowseActivity
 * Also takes care of sorting
 * Contains a list of ForumEntries and a searchController
 * and determines whether we use the favourites or readLater view
 */
public class BrowseController {
  /*
   * TODO: All sorting functions need to implement their sort algorithm.
   */
  private ArrayList<ForumEntry> forumEntries;
  private SearchController searchController;
  private DataManager dataManager;
  
  private ForumEntryList onLineModel;
  private ForumEntryList readLaterModel;
  private ForumEntryList favouritesModel;
  private ForumEntryList myAuthoredModel;
  
  public ArrayList<ForumEntry> result;

  
  /**
   * Constructor.
   * @param viewsContext This is the instance of the view creating the controller. 
   * Generally, the argument will be "this". This parameter is required so that 
   * the model classes have access to the views update() method.
   */
  public BrowseController(Observer viewsContext){ 
    this.forumEntries = new ArrayList<ForumEntry>();
    this.searchController = new SearchController();
    this.dataManager = new DataManager();
    
    this.onLineModel = new ForumEntryList();
    this.readLaterModel = new ForumEntryList();
    this.favouritesModel = new ForumEntryList();
    this.myAuthoredModel = new ForumEntryList();
    
    this.onLineModel.addObserver(viewsContext);
    this.readLaterModel.addObserver(viewsContext);
    this.favouritesModel.addObserver(viewsContext);
    this.myAuthoredModel.addObserver(viewsContext);
  }
  /**
   * Sorts the ForumEntrys in the model by their date with the most recent appearing
   * first. This only sorts ForumEntries which are in the online view and this method
   * does not invoke the models notifyObservers() method.
   * and calls the models notifyObservers function.
   */
  public void sortByTime()
  {
    ArrayList<ForumEntry> results = null;
    
    try
    {
      results = this.searchController.searchForumEntries("", null);
    } 
    catch (ClientProtocolException e)
    {
      e.printStackTrace();
    } 
    catch (IOException e)
    {
      e.printStackTrace();
    }
    
    if(results != null)
    {
      Collections.sort(results, new Comparator<ForumEntry>(){
          public int compare( ForumEntry f1, ForumEntry f2){
            if (f1.getQuestion().getDate()==null && f2.getQuestion().getDate()==null){
              return 0;
            }
            else if (f1.getQuestion().getDate()==null){
              return 1;
            }
            else if (f2.getQuestion().getDate()==null){
              return -1;
            }
            else{
              return f2.getQuestion().getDate().compareTo(f1.getQuestion().getDate());
            }
          }
        });
    
      this.onLineModel.setView(results);
    }
  
    
  }

  /**
   * Sorts the ForumEntrys in the model by their rating (up votes). ForumEntries with the
   * highest rating appear first. This method only sorts ForumEntries in the online model and
   * it does not invoke the models notifyObservers method.
   */
  public void sortByRating(){
    ArrayList<ForumEntry> results = null;
    
    try
    {
      results = this.searchController.searchForumEntries("", null);
    } 
    catch (ClientProtocolException e)
    {
      e.printStackTrace();
    } 
    catch (IOException e)
    {
      e.printStackTrace();
    }
    
    if(results != null)
    {
      Collections.sort(results, new Comparator<ForumEntry>(){
          public int compare( ForumEntry f1, ForumEntry f2){
              return  f2.getQuestion().getUpVote()-f1.getQuestion().getUpVote();
          }
        });
    
      this.onLineModel.setView(results);
    }
  }
  
  /**
   * Sorts the ForumEntrys in the model by if they have a picture or not. ForumEntries
   * with a picture appear first. This only sorts ForumEntries in the online model and
   * it does not invoke the models notifyObservers method.
   */
  public void sortByHasPicture(){
    ArrayList<ForumEntry> results = null;
    
    try
    {
      results = this.searchController.searchForumEntries("", null);
    } 
    catch (ClientProtocolException e)
    {
      e.printStackTrace();
    } 
    catch (IOException e)
    {
      e.printStackTrace();
    }
    
    if(results != null)
    {
      Collections.sort(results, new Comparator<ForumEntry>(){
        public int compare( ForumEntry f1, ForumEntry f2){
          if (f1.getQuestion().getPicture()==null && f2.getQuestion().getPicture()==null){
            return 0;
          }
          else if (f1.getQuestion().getPicture()==null){
            return 1;
          }else{
            return -1;
          }
        }
      });
      this.onLineModel.setView(results);
    }
  }
  
  /**
   * Searchs the remote server for the searchTerm and sets the model with the results.
   * This function can ONLY be called from a network thread within the activity.
   * This function does NOT invoke the models notifyObservers method. Try using
   * useOnLineView() method to do that.
   * @param searchTerm The term to search for.
   */
  public void searchAndSet(String searchTerm)
  {
    ArrayList<ForumEntry> results = null;
    
    try
    {
      results = this.searchController.searchForumEntries(searchTerm, null);
    } 
    catch (ClientProtocolException e)
    {
      e.printStackTrace();
    } 
    catch (IOException e)
    {
      e.printStackTrace();
    }
    
    if(results != null)
    {
      this.onLineModel.setView(results);
    }
  }
  
  /**
   * Directly calls the online models notifyObservers() method.
   */
  public void useOnLineView()
  {
    this.onLineModel.notifyObservers();
  }
  
  /**
   * Sets the model to be what ever was found in the read later save location
   * and calls the models notifyObservers function.
   */
  public void useReadLaterView()
  {
    ArrayList<ForumEntry> fel = this.dataManager.getReadLater();
    this.readLaterModel.setView(fel);
    this.readLaterModel.notifyObservers();
  }
  
  /**
   * Sets the model to be what ever was found in the favourites save location
   * and calls the models notifyObservers function.
   */
  public void useFavouritesView()
  {
    ArrayList<ForumEntry> fel = this.dataManager.getFavourites();
    this.favouritesModel.setView(fel);
    this.favouritesModel.notifyObservers();
  }
  
  /**
   * Sets the model to be what ever was found in the my authored save location
   * and calls the models notifyObservers function.
   */
  public void useMyAuthoredView()
  {
    ArrayList<ForumEntry> fel = this.dataManager.getMyAuthored();
    this.myAuthoredModel.setView(fel);
    this.myAuthoredModel.notifyObservers();
  }
  
  
  /**
   * Sorts the ArrayList results by date. ForumEntries in the list with an earlier appear
   * first. This method will update the model and call the models notifyObservers() method.
   * @param results The ArraList to sort
   * @param casetype Indicates what view is being sorted. 'F' for favourites, 'S' for read later
   * and 'M' for my authored.
   */
  public void sortByTimeLocal(ArrayList<ForumEntry> results, String casetype){
    if(results != null)
    {
      Collections.sort(results, new Comparator<ForumEntry>(){
          public int compare( ForumEntry f1, ForumEntry f2){
            if (f1.getQuestion().getDate()==null && f2.getQuestion().getDate()==null){
              return 0;
            }
            else if (f2.getQuestion().getDate()==null){
              return -1;
            }
            else if (f1.getQuestion().getDate()==null){
              return 1;
            }
            else{
              return f2.getQuestion().getDate().compareTo(f1.getQuestion().getDate());
            }
          }
        });
        if (casetype.equals("F")){
          this.favouritesModel.setView(results);
          this.favouritesModel.notifyObservers();
        }
        else if (casetype.equals("S")){
        this.readLaterModel.setView(results);
        this.readLaterModel.notifyObservers();
      }
        else if (casetype.equals("M")){
        this.myAuthoredModel.setView(results);
        this.myAuthoredModel.notifyObservers();
      } 
        result=results;
    }
  
  }
  
  /**
   * Sorts the ArrayList results by rating. ForumEntries in the list with a higher rating appear
   * first. This method will update the model and call the models notifyObservers() method.
   * @param results The ArraList to sort
   * @param casetype Indicates what view is being sorted. 'F' for favourites, 'S' for read later
   * and 'M' for my authored.
   */
  public void sortByRatingLocal(ArrayList<ForumEntry> results, String casetype){
    if(results != null)
    {
      Collections.sort(results, new Comparator<ForumEntry>(){
          public int compare( ForumEntry f1, ForumEntry f2){
              return  f2.getQuestion().getUpVote()-f1.getQuestion().getUpVote();
          }
        });
    
      if (casetype.equals("F")){
          this.favouritesModel.setView(results);
          this.favouritesModel.notifyObservers();
        }
      else if (casetype.equals("S")){
        this.readLaterModel.setView(results);
        this.readLaterModel.notifyObservers();
      }
      else if (casetype.equals("M")){
        this.myAuthoredModel.setView(results);
        this.myAuthoredModel.notifyObservers();
      }
      result=results;
    }
  }
  
  /**
   * Sorts the ArrayList results by if they have a picture. ForumEntries in the list with 
   * a picture appear first ones wihtout a picture appear last.
   * This method will update the model and call the models notifyObservers() method.
   * @param results The ArraList to sort
   * @param casetype Indicates what view is being sorted. 'F' for favourites, 'S' for read later
   * and 'M' for my authored.
   */
  public void sortByHasPictureLocal(ArrayList<ForumEntry> results, String casetype){
    if(results != null)
    {
      Collections.sort(results, new Comparator<ForumEntry>(){
        public int compare( ForumEntry f1, ForumEntry f2){
          if (f1.getQuestion().getPicture()==null && f2.getQuestion().getPicture()==null){
            return 0;
          }
          else if (f1.getQuestion().getPicture()==null){
            return 1;
          }else{
            return -1;
          }
        }
      });
      if (casetype.equals("F")){
          this.favouritesModel.setView(results);
          this.favouritesModel.notifyObservers();
        }
      else if (casetype.equals("S")){
        this.readLaterModel.setView(results);
        this.readLaterModel.notifyObservers();
      }
      else if (casetype.equals("M")){
        this.myAuthoredModel.setView(results);
        this.myAuthoredModel.notifyObservers();
      }
      result=results;
    }
  }

  public void sortByLocation(ArrayList<ForumEntry> listToSort,String location) {
    // TODO Auto-generated method stub
    ArrayList<ForumEntry> results = null;
    ArrayList<ForumEntry> sortedResults = new ArrayList<ForumEntry>();
    if(listToSort==null){
    try {
      results.addAll(this.searchController.searchForumEntries("", null,true));
    } catch (ClientProtocolException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    
    AuthorController authorController = new AuthorController();
    
    if (authorController.getModel().isSet() && !authorController.getModel().isGpsSet()){
      for(int i = 0; i<results.size(); i++){
      if(authorController.getModel().getSessionLocation() == results.get(i).getLocation()){
        sortedResults.add(results.get(i));
        sortedResults.remove(i);
        }
      }
    }
    }
    if (location!=null){
      for(int i = 0; i<listToSort.size(); i++){
      if(location == listToSort.get(i).getLocation()){
        sortedResults.add(listToSort.get(i));
        sortedResults.remove(i);
        }
      }
    }
    this.onLineModel.setView(results);
    result = sortedResults;
  }
  
  
  public void sortByLocation(){
    sortByLocation(null,null);
  }

}
Java Source Code List
