ReplyActivity.java

package com.airlocksoftware.hackernews.activity;

import org.apache.commons.lang3.StringUtils;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;

import com.airlocksoftware.hackernews.R;
import com.airlocksoftware.hackernews.activity.LoginActivity.PostAction;
import com.airlocksoftware.hackernews.data.UserPrefs;
import com.airlocksoftware.hackernews.loader.ReplyLoader;
import com.airlocksoftware.hackernews.model.Comment;
import com.airlocksoftware.hackernews.model.Result;
import com.airlocksoftware.hackernews.model.Story;
import com.airlocksoftware.holo.actionbar.ActionBarButton;
import com.airlocksoftware.holo.type.FontEdit;
import com.airlocksoftware.holo.type.FontText;

/**
 * Activity for replying to Comments or Stories (i.e. top-level comments). Uses ReplyLoader to send the reply in the
 * background. If the user is not logged in, pass them to the LoginActivity.
 **/
public class ReplyActivity extends BackActivity implements LoaderManager.LoaderCallbacks<Result> {

	// State
	private Story mStory;
	private Comment mComment;
	private String mReplyText;
	private boolean mReadyToSend = false;

	// Views
	FontText mParentUsername, mParentTitle, mParentComment, mReplyUsername;
	FontEdit mReplyComment;

	// Listeners
	private OnClickListener mSendListener = new OnClickListener() {
		@Override
		public void onClick(View v) {
			mReplyText = mReplyComment.getText()
																.toString();
			if (StringUtils.isNotBlank(mReplyText)) {
				mReadyToSend = true;
				getSupportLoaderManager().restartLoader(0, null, ReplyActivity.this);
			} else {
				Toast.makeText(getApplicationContext(), getString(R.string.reply_is_blank), Toast.LENGTH_LONG)
							.show();
			}
		}
	};

	private OnClickListener mCancelListener = new OnClickListener() {
		@Override
		public void onClick(View v) {
			Toast.makeText(ReplyActivity.this, "Reply canceled.", Toast.LENGTH_SHORT)
						.show();
			finish();
		}
	};

	// Constants
	public static final String COMMENT = ReplyActivity.class.getSimpleName() + ".comment";
	public static final String STORY = ReplyActivity.class.getSimpleName() + ".story";
	public static final String REPLY_TEXT = ReplyActivity.class.getSimpleName() + ".replyText";

	@Override
	public void onCreate(Bundle savedState) {
		super.onCreate(savedState);
		setContentView(R.layout.act_reply);
		findViews();
		retrieveBundles(savedState, getIntent().getExtras());
		retrieveUserPrefs();
		setupActionBar();
		bindViews();

		// startup loader (but it won't really be run)
		getSupportLoaderManager().initLoader(0, null, ReplyActivity.this);
	}

	private void bindViews() {
		if (mReplyText != null) mReplyComment.setText(mReplyText);
		mReplyUsername.setText(new UserPrefs(this).getUsername());

		if (mStory != null) {
			mParentTitle.setText(mStory.title);
			mParentUsername.setText(mStory.username);
			if (mStory.selfText != null) mParentComment.setText(mStory.selfText);
			else mParentComment.setVisibility(View.GONE);

		} else if (mComment != null) {
			mParentUsername.setText(mComment.username);
			mParentComment.setText(mComment.generateSpannedHtml());
			mParentTitle.setVisibility(View.GONE);

		} else throw new RuntimeException("Neither a comment nor a story was passed to reply activity.");
	}

	private void setupActionBar() {
		getActionBarView().getController()
											.setTitleText(getString(R.string.reply));
		ActionBarButton send = new ActionBarButton(this).icon(R.drawable.ic_action_send);
		ActionBarButton cancel = new ActionBarButton(this).icon(R.drawable.ic_action_cancel);
		send.text("Send")
				.setOnClickListener(mSendListener);
		cancel.text("Cancel")
					.setOnClickListener(mCancelListener);
		getActionBarView().getController()
											.addButton(send);
		getActionBarView().getController()
											.addButton(cancel);
	}

	/** Check UserPrefs for logged in state. **/
	private void retrieveUserPrefs() {
		if (!new UserPrefs(this).isLoggedIn()) {
			// start LoginActivity with appropriate PostAction
			Intent intent = new Intent(this, LoginActivity.class);
			if (mComment != null) intent.putExtra(LoginActivity.POST_COMMENT, mComment);
			else if (mStory != null) intent.putExtra(LoginActivity.POST_STORY, mStory);
			intent.putExtra(LoginActivity.POST_ACTION, PostAction.REPLY);
			startActivity(intent);
		}
	}

	private void retrieveBundles(Bundle savedState, Bundle extras) {
		if (savedState != null) {
			mStory = (Story) savedState.getSerializable(STORY);
			mComment = (Comment) savedState.getSerializable(COMMENT);
			mReplyText = savedState.getString(REPLY_TEXT);
		}

		if (extras != null) {
			mStory = (Story) extras.getSerializable(STORY);
			mComment = (Comment) extras.getSerializable(COMMENT);
		}
	}

	private void findViews() {
		mParentUsername = (FontText) findViewById(R.id.txt_parent_username);
		mParentTitle = (FontText) findViewById(R.id.txt_parent_title);
		mParentComment = (FontText) findViewById(R.id.txt_parent_comment);
		mReplyUsername = (FontText) findViewById(R.id.txt_reply_username);
		mReplyComment = (FontEdit) findViewById(R.id.edit_reply_comment);
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
		mReplyText = mReplyComment.getText()
															.toString();
		if (mStory != null) outState.putSerializable(STORY, mStory);
		if (mComment != null) outState.putSerializable(COMMENT, mComment);
		if (StringUtils.isNotBlank(mReplyText)) outState.putString(REPLY_TEXT, mReplyText);
		super.onSaveInstanceState(outState);
	}

	@Override
	public Loader<Result> onCreateLoader(int id, Bundle args) {
		// setup replyId
		long replyId = -1;
		if (mStory != null) replyId = mStory.storyId;
		else if (mComment != null) replyId = mComment.commentId;

		if (mReadyToSend) return new ReplyLoader(this, replyId, mReplyText);
		else return new ReplyLoader(this); // no data to send reply with
	}

	@Override
	public void onLoadFinished(Loader<Result> loader, Result result) {
		switch (result) {
		case FAILURE:
			Toast.makeText(this, getString(R.string.reply_no_connection), Toast.LENGTH_LONG)
						.show();
			break;
		case SUCCESS:
			Toast.makeText(this, getString(R.string.reply_sent), Toast.LENGTH_SHORT)
						.show();
			finish();
			break;
		default:
			// no data was passed to loader aka we weren't ready to send data (do nothing)
			break;
		}
	}

	@Override
	public void onLoaderReset(Loader<Result> loader) {
		// No implementation necessary
	}

	public static void startCommentReplyActivity(Context context, Comment comment) {
		Intent intent = new Intent(context, ReplyActivity.class);
		intent.putExtra(COMMENT, comment);
		context.startActivity(intent);
	}

	public static void startStoryReplyActivity(Context context, Story story) {
		Intent intent = new Intent(context, ReplyActivity.class);
		intent.putExtra(ReplyActivity.STORY, story);
		context.startActivity(intent);
	}

}