NewDirectMessage.java

package com.tuit.ar.activities;

import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.tuit.ar.R;
import com.tuit.ar.api.Twitter;
import com.tuit.ar.api.TwitterAccountRequestsObserver;
import com.tuit.ar.api.TwitterRequest;
import com.tuit.ar.api.request.Options;
import com.tuit.ar.models.User;

public class NewDirectMessage extends Activity implements OnClickListener, TwitterAccountRequestsObserver {
	static private final int MAX_CHARS = 140;

	private String toUser;
	private EditText messageField;
	private TextView charCount;
	private Timer autocompleter = new Timer(false);
	private AutoCompleteTextView userSelect = null;
	private ArrayAdapter<String> usersAdapter = null;
	private TimerTask autocompleterTask = null;
	private Button send = null;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
		setContentView(R.layout.new_direct_message);
		send = (Button)findViewById(R.id.send);
		send.setOnClickListener(this);
		Twitter.getInstance().getDefaultAccount().addRequestObserver(this);

		Intent intent = getIntent();
		toUser = intent.getStringExtra("to_user");
		TextView username = (TextView)findViewById(R.id.toUser);
		userSelect = (AutoCompleteTextView)findViewById(R.id.toUserSelect);
		if (toUser != null) {
			username.setText("To @" + toUser);
			userSelect.setVisibility(View.INVISIBLE);
		} else {
			username.setVisibility(View.INVISIBLE);
			usersAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, new String[]{});
			userSelect.setAdapter(usersAdapter);
			userSelect.addTextChangedListener(new TextWatcher() {
				public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
				}
				
				public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
						int arg3) {
				}
				
				public void afterTextChanged(Editable arg0) {
					if (autocompleterTask != null) autocompleterTask.cancel();
					autocompleterTask = new UpdateUsernameToSelect();
					autocompleter.schedule(autocompleterTask, 1000);
				}
			});
		}

		messageField = (EditText) findViewById(R.id.tweetMessage);
		charCount = (TextView) findViewById(R.id.charCount);

		messageField.setOnKeyListener(new OnKeyListener() {
			public boolean onKey(View v, int keyCode, KeyEvent event) {
				updateCharCount();
				return false;
			}
		});
	}

	private void updateCharCount() {
		charCount.setText(String.valueOf(MAX_CHARS - messageField.getText().toString().length()));
	}

	public void onClick(View v) {
		if (toUser == null) {
			String user = userSelect.getText().toString();
			toUser = user;
		}

		if (toUser == null) {
			// FIXME: improve error message?
			sendFailed(null);
			return;
		}

		String message = messageField.getText().toString();

		if (message == null || message.length() == 0) {
			// FIXME: improve error message?
			sendFailed(null);
			return;
		}

		try {
			ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
			params.add(new BasicNameValuePair("text", message));
			params.add(new BasicNameValuePair("screen_name", toUser));
			int method = TwitterRequest.METHOD_POST;
			Twitter.getInstance().getDefaultAccount().requestUrl(Options.SEND_DIRECT_MESSAGE, params, method);
		} catch (Exception e) {
			sendFailed(e.getLocalizedMessage());
		}
	}
	public void sendFailed(String message) {
		if (message == null)
			Toast.makeText(this, getString(R.string.unableToPost), Toast.LENGTH_SHORT).show();
		else
			Toast.makeText(this, getString(R.string.unableToPost) + " (" + message + ")", Toast.LENGTH_SHORT).show();
	}

	public void requestHasStarted(TwitterRequest request) {
		setProgressBarIndeterminateVisibility(true);
	}

	public void requestHasFinished(TwitterRequest request) {
		setProgressBarIndeterminateVisibility(false);
    	if (request.getUrl().equals(Options.SEND_DIRECT_MESSAGE)) {
    		if (request.getStatusCode() >= 200 && request.getStatusCode() < 400) {
    			Toast.makeText(this, getString(R.string.messageSent), Toast.LENGTH_SHORT).show();
    			finish();
    		}
    		else sendFailed(request.getErrorMessage());
    	}
	}

	public void onDestroy() {
		super.onDestroy();
		send.setOnClickListener(null);
		messageField.setOnKeyListener(null);
		Twitter.getInstance().getDefaultAccount().removeRequestObserver(this);
	}

	protected class UpdateUsernameToSelect extends TimerTask {
		public void run() {
			String username = userSelect.getText().toString();
			ArrayList<User> users = User.select("substr(screen_name,0," + username.length() + ") LIKE ?", new String[]{username}, null, null, null, "5");
			usersAdapter.clear();
			for (User u : users) {
				usersAdapter.add(u.getScreenName());
			}
			usersAdapter.notifyDataSetChanged();
		}
	}
}