ObjectCollectionRenderFragment.java

package com.dimuthuupeksha.viewer.android.ui;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockListFragment;
import com.actionbarsherlock.view.MenuItem;
import com.dimuthuupeksha.viewer.android.applib.ROClient;
import com.dimuthuupeksha.viewer.android.applib.RORequest;
import com.dimuthuupeksha.viewer.android.applib.exceptions.ConnectionException;
import com.dimuthuupeksha.viewer.android.applib.exceptions.InvalidCredentialException;
import com.dimuthuupeksha.viewer.android.applib.exceptions.UnknownErrorException;
import com.dimuthuupeksha.viewer.android.applib.representation.ActionResultItem;
import com.dimuthuupeksha.viewer.android.applib.representation.DomainTypeCollection;
import com.dimuthuupeksha.viewer.android.applib.representation.JsonRepr;
import com.dimuthuupeksha.viewer.android.applib.representation.Link;
import com.dimuthuupeksha.viewer.android.applib.representation.ObjectMember;
import com.dimuthuupeksha.viewer.android.uimodel.Model;

/* Author - Dimuthu Upeksha*/

public class ObjectCollectionRenderFragment extends SherlockListFragment implements ActionBar.TabListener {

    private Fragment mFragment;
    private Map<String, ObjectMember> collectionMember;
    private String describedby;
    private boolean refreshed = false;
    Map<String, Map<String, Object>> referenceMap;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        String data = (String) getActivity().getIntent().getSerializableExtra("data");
        ActionResultItem actionResultItem = JsonRepr.fromString(ActionResultItem.class, data);
        describedby = actionResultItem.getLinkByRel("describedby").getHref();
        collectionMember = new HashMap<String, ObjectMember>();

        Iterator<String> it = actionResultItem.getMembers().keySet().iterator();
        while (it.hasNext()) {
            String key = it.next();
            String memberType = actionResultItem.getMembers().get(key).getMemberType();
            if (memberType.equals("collection")) {
                collectionMember.put(key, actionResultItem.getMembers().get(key));
            }
        }
        refresh();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Intent intent;
        switch (item.getItemId()) {

        case R.id.home:
            intent = new Intent(this.getActivity(), HomeActivity.class);
            startActivity(intent);
            break;
        case R.id.services:
            intent = new Intent(this.getActivity(), ServicesActivity.class);
            intent.putExtra("link", Model.getInstance().getHomePage().getLinkByRel("services"));
            startActivity(intent);
            break;
        case R.id.back:

        }
        return true;
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        String[] collectionIds = new String[referenceMap.keySet().size()];
        collectionIds = referenceMap.keySet().toArray(collectionIds);
        String selectedId = collectionIds[position];
        if (collectionMember.get(selectedId).getDisabledReason() == null) {
            Link detailLink = collectionMember.get(selectedId).getLinkByRel("details");
            Intent intent = new Intent(this.getActivity(), CollectionRenderActivity.class);
            intent.putExtra("title", ((Map<String, String>) l.getItemAtPosition(position)).get("head"));
            if (detailLink != null) {
                String data = detailLink.AsJson();
                intent.putExtra("data", data);
                intent.putExtra("forged", false);
                System.out.println(selectedId);

            } else {

                String valueJson = collectionMember.get(selectedId).getValue().toString();
                String forgedCollection = "{\"value\":" + valueJson + "}";
                intent.putExtra("data", forgedCollection);
                intent.putExtra("forged", true);
                System.out.println(selectedId);

            }
            startActivity(intent);
        }else{
            Toast.makeText(getActivity().getApplicationContext(), collectionMember.get(selectedId).getDisabledReason(), Toast.LENGTH_SHORT).show();
        }

    }

    public void refresh() {
        if (!refreshed) {
            new ResolveReferenceTask(this).execute();
            refreshed = true;
        }
    }

    private void render(Map<String, Map<String, Object>> referenceMap) { // <key,
                                                                         // <(collection),object>>
        this.referenceMap = referenceMap;
        String[] collectionTitles = new String[referenceMap.keySet().size()];
        collectionTitles = referenceMap.keySet().toArray(collectionTitles);
        List<Map<String, String>> detailedTitles = new ArrayList<Map<String, String>>();
        for (int i = 0; i < collectionTitles.length; i++) {
            String head = ((DomainTypeCollection) referenceMap.get(collectionTitles[i]).get("collection")).getExtensions().get("friendlyName").getTextValue();
            Map<String, String> titleMap = new HashMap<String, String>();
            titleMap.put("head", head);
            if (collectionMember.get(collectionTitles[i]).getDisabledReason() != null) {
                titleMap.put("subhead", collectionMember.get(collectionTitles[i]).getDisabledReason());
            } else {
                titleMap.put("subhead", "");
            }
            detailedTitles.add(titleMap);
        }

        SimpleAdapter sadapter = new SimpleAdapter(getSherlockActivity(), detailedTitles, R.layout.list_item_with_two_rows, new String[] { "head", "subhead" }, new int[] { R.id.txtHead, R.id.txtSubhead });
        setListAdapter(sadapter);
        getListView().setBackgroundColor(Color.WHITE);
    }

    private class ResolveReferenceTask extends AsyncTask<Void, Void, Map<String, Map<String, Object>>> {

        ProgressDialog pd;
        int error = 0;
        private static final int INVALID_CREDENTIAL = -1;
        private static final int CONNECTION_ERROR = -2;
        private static final int UNKNOWN_ERROR = -3;

        public ResolveReferenceTask(ObjectCollectionRenderFragment fragment) {
            pd = new ProgressDialog(fragment.getActivity());
            pd.setMessage("Loading");
        }

        @Override
        protected void onPreExecute() {
            pd.show();
        }

        @Override
        protected Map<String, Map<String, Object>> doInBackground(Void... params) {
            ROClient client = ROClient.getInstance();
            Iterator<String> it = collectionMember.keySet().iterator();
            Map<String, Map<String, Object>> referenceMap = new HashMap<String, Map<String, Object>>();
            try {
                while (it.hasNext()) {
                    String key = it.next();
                    String url = describedby + "/collections/" + key;
                    RORequest request = client.RORequestTo(url);
                    DomainTypeCollection collection = client.executeT(DomainTypeCollection.class, "GET", request, null);
                    Map<String, Object> content = new HashMap<String, Object>();
                    content.put("collection", collection);
                    referenceMap.put(key, content);
                }
            } catch (ConnectionException e) {
                error = CONNECTION_ERROR;
                e.printStackTrace();
            } catch (InvalidCredentialException e) {
                error = INVALID_CREDENTIAL;
                e.printStackTrace();
            } catch (UnknownErrorException e) {
                error = UNKNOWN_ERROR;
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return referenceMap;
        }

        @Override
        protected void onPostExecute(Map<String, Map<String, Object>> result) {
            if (result != null) {
                render(result);
            }

            if (error == INVALID_CREDENTIAL) {
                /* Username and password not valid show the Login */
                Intent intent = new Intent(ObjectCollectionRenderFragment.this.getActivity(), LogInActivity.class);
                ObjectCollectionRenderFragment.this.getActivity().startActivity(intent);
            }

            if (error == CONNECTION_ERROR) {
                /** Show the error Dialog */
                AlertDialog alertDialog = new AlertDialog.Builder(ObjectCollectionRenderFragment.this.getActivity()).create();
                alertDialog.setTitle("Connection Error");
                alertDialog.setMessage("Please check your settings.");

                // Setting OK Button
                alertDialog.setButton("Close", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });

                // Showing Alert Message
                alertDialog.show();
            }

            pd.hide();

        }

    }

    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
        mFragment = new ObjectCollectionRenderFragment();
        // Attach fragment1.xml layout
        ft.add(android.R.id.content, mFragment);
        ft.attach(mFragment);
    }

    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
        // Remove fragment1.xml layout
        ft.remove(mFragment);
    }

    public void onTabReselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub

    }

}