EditRoomActivity.java

package bg.mentormate.academy.radarapp.activities;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.Toast;

import com.parse.GetCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.SaveCallback;

import java.util.ArrayList;
import java.util.List;

import bg.mentormate.academy.radarapp.R;
import bg.mentormate.academy.radarapp.adapters.EditRoomUserAdapter;
import bg.mentormate.academy.radarapp.data.LocalDb;
import bg.mentormate.academy.radarapp.models.Room;
import bg.mentormate.academy.radarapp.models.User;

public class EditRoomActivity extends ActionBarActivity implements View.OnClickListener,
        AdapterView.OnItemLongClickListener,
        SwipeRefreshLayout.OnRefreshListener {

    private Menu mMenu;
    private Button mBtnApplyChanges;
    private EditText mEtChangePassword;
    private EditText mEtChangeRoomName;
    private GridView mGvUsers;
    private SwipeRefreshLayout mSrlRefresh;

    private LocalDb mLocalDb;
    private User mCurrentUser;
    private Room mRoom;
    private EditRoomUserAdapter mEditRoomUserAdapter;
    private List<User> mUsers;
    private ArrayList<User> mSelectedUsers;
    private boolean mUsersDeleted;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edit_room);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        init();
    }

    private void init() {
        mLocalDb = LocalDb.getInstance();
        mCurrentUser = mLocalDb.getCurrentUser();
        mRoom = mCurrentUser.getRoom();
        mUsers = mRoom.getUsers();
        mSelectedUsers = new ArrayList<>();
        mUsersDeleted = false;

        mEtChangePassword = (EditText) findViewById(R.id.etChangePass);
        mEtChangeRoomName = (EditText) findViewById(R.id.etChangeRoomName);
        mBtnApplyChanges = (Button) findViewById(R.id.btnApplyChanges);
        mGvUsers = (GridView) findViewById(R.id.usersList);
        mSrlRefresh = (SwipeRefreshLayout) findViewById(R.id.srlRefresh);

        mRoom.fetchIfNeededInBackground(new GetCallback<ParseObject>() {
            @Override
            public void done(ParseObject parseObject, ParseException e) {
                mEtChangeRoomName.setHint(mRoom.getName());
            }
        });

        mEditRoomUserAdapter = new EditRoomUserAdapter(this, mUsers);
        mGvUsers.setAdapter(mEditRoomUserAdapter);

        mSrlRefresh.setColorSchemeColors(
                getResources().getColor(R.color.br_dark_background));

        mBtnApplyChanges.setOnClickListener(this);
        mGvUsers.setOnItemLongClickListener(this);
        mSrlRefresh.setOnRefreshListener(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_edit_room, menu);

        this.mMenu = menu;

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        switch (id) {
            case android.R.id.home:
                this.finish();
                return true;
            case R.id.action_delete_users:
                deleteSelectedUsers();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    private void deleteSelectedUsers() {
        if(!mSelectedUsers.isEmpty()){
            try {
                for (int i = 0; i < mSelectedUsers.size(); i++) {
                    mEditRoomUserAdapter.getView(i, null, null).setBackgroundColor(Color.WHITE);
                    mUsers.remove(mSelectedUsers.get(i));
                }
            } catch (Exception e) {
                Log.d(EditRoomActivity.class.getSimpleName(),
                        "deleteSelectedUsers() : " + e.getMessage());
            }
            mEditRoomUserAdapter = new EditRoomUserAdapter(this, mUsers);
            mGvUsers.setAdapter(mEditRoomUserAdapter);
            mSelectedUsers.clear();
            mMenu.findItem(R.id.action_delete_users).setVisible(false);
            mUsersDeleted = true;
        }
    }

    @Override
    public void onClick(View v) {
        switch(v.getId()){
            case R.id.btnApplyChanges:
                applyChanges();
                break;
        }
    }

    private void applyChanges() {
        String newRoomName = mEtChangeRoomName.getText().toString();
        String passkey = mEtChangePassword.getText().toString();
        boolean changesApplied = false;

        if (!newRoomName.trim().isEmpty() && !newRoomName.equals(mRoom.getName())) {
            mRoom.setName(newRoomName.trim());
            changesApplied = true;
        }

        if(!passkey.trim().isEmpty()) {
            mRoom.setPassKey(passkey.trim());
            changesApplied = true;
        }

        if(mUsersDeleted) {
            changesApplied = true;
        }

        if (changesApplied) {
            mRoom.setUsers(mUsers);
            mRoom.saveInBackground(new SaveCallback() {
                @Override
                public void done(ParseException e) {
                    if (e != null) {
                        Log.d(EditRoomActivity.class.getSimpleName(),
                                "applyChanges() : " + e.getMessage());
                    }
                }
            });
        } else {
            Toast.makeText(this,
                    getString(R.string.nothing_changed_text),
                    Toast.LENGTH_SHORT).show();
        }

        finish();
    }

    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
        User selectedMember = mUsers.get(position);

        if (selectedMember.equals(mCurrentUser)) {
            Toast.makeText(this,
                    getString(R.string.cant_select_yourself_warning),
                    Toast.LENGTH_SHORT).show();
            return false;
        }

        if (!mSelectedUsers.contains(selectedMember)) {
            mSelectedUsers.add(selectedMember);
            view.setBackgroundColor(getResources().getColor(R.color.br_toggle_on));
        } else {
            mSelectedUsers.remove(selectedMember);
            view.setBackgroundColor(Color.WHITE);
        }

        setDeleteIconVisibility();
        return true;
    }

    private void setDeleteIconVisibility() {
        if (mSelectedUsers.size() > 0) {
            mMenu.findItem(R.id.action_delete_users).setVisible(true);
        } else {
            mMenu.findItem(R.id.action_delete_users).setVisible(false);
        }
    }

    @Override
    public void onRefresh() {
        mRoom.fetchInBackground(new GetCallback<ParseObject>() {
            @Override
            public void done(ParseObject parseObject, ParseException e) {
                mUsers.clear();
                mUsers.addAll(mRoom.getUsers());
                mEditRoomUserAdapter.notifyDataSetChanged();

                mSrlRefresh.setRefreshing(false);
            }
        });
    }
}