ChatService.java

package com.tinkeracademy.projects;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;

public class ChatService {
	
	public static final String URL = "http://tinkercloud-1273.appspot.com/chat?channel=summer2016";

	public enum ChatStatus {
		YES,
		NO,
		ERROR
	}
	
	public void postToServer(String line)
	{
		HttpClient client = null;
		HttpResponse response = null;
		try {
			HttpPost post = new HttpPost(URL);
			List<NameValuePair> params = new ArrayList<NameValuePair>();
			params.add( new BasicNameValuePair( "chat", line ));
			UrlEncodedFormEntity paramEntity = new UrlEncodedFormEntity( params );
			post.setEntity(paramEntity);
			client = HttpClients.createDefault();
			response = client.execute(post);
		} catch (Exception e) {
			e.printStackTrace();
			try {
				if (client != null) {
					if (client instanceof CloseableHttpClient) {
						((CloseableHttpClient) client).close();
					}
				}
				if (response != null) {
					if (response instanceof CloseableHttpResponse) {
						((CloseableHttpResponse) response).close();
					}
				}
			} catch(IOException e1) {
				e1.printStackTrace();
			}
		}
	}
	
	public ArrayList<String> getFromServer()
	{
		return null;
	}
	
	public ChatStatus readLines(File file, ArrayList<String> lines) {
		FileReader fileReader = null;
		BufferedReader bufReader = null;
		try {
			fileReader = new FileReader(file);
			bufReader = new BufferedReader(fileReader);
			String line = bufReader.readLine();
			while (line != null) {
				lines.add(line);
				line = bufReader.readLine();
			}
			return ChatStatus.YES;
		} catch(IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (fileReader != null)
					fileReader.close();
				if (bufReader != null)
					bufReader.close();
			} catch(IOException e) {
				e.printStackTrace();
			}
		}
		return ChatStatus.ERROR;
	}
	
	public ChatStatus writeLine(File file, String line) {
		FileWriter fileWriter = null;
		PrintWriter printWriter = null;
		try {
			fileWriter = new FileWriter(file, true);
			printWriter = new PrintWriter(fileWriter);
			printWriter.println(line);
			return ChatStatus.YES;
		} catch(IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (fileWriter != null) {
					fileWriter.close();
				}
				if (printWriter != null) {
					printWriter.close();
				} 
			} catch(IOException e) {
				e.printStackTrace();
			}
		}
		return ChatStatus.ERROR;
	}
	
	public ChatStatus createFile(String name) {
		String homeDirectory = System.getProperty("user.home");
		File file = new File(homeDirectory, name);
		try {
			boolean created = file.createNewFile();
			if (created) {
				return ChatStatus.YES;
			} else {
				return ChatStatus.NO;
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return ChatStatus.ERROR;
	}
}