Add code for interfacing with the Twitter API

HW5/src/edu/uncc/itcs4180/hw5/TwitterClient.java

@@ -1,13 +0,0 @@
-package edu.uncc.itcs4180.hw5;
-
-import java.net.URL;
-
-public class TwitterClient {
-	
-	private final String API_KEY = "HuEbvsXOxQsKVmTneyilVtsV6";
-	private final String API_SECRET = "ZIJqmKEGoQUKLCIit15SKz6XIl4PP1xgDm1jVCIBSDhmImzFqk";
-	
-	private final String URL_TOKEN = "https://api.twitter.com/oauth2/token";
-	private final String URL_API = "https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=";
-
-}

HW5/src/edu/uncc/itcs4180/hw5/twitter/Tweet.java

@@ -0,0 +1,93 @@
+package edu.uncc.itcs4180.hw5.twitter;
+
+// Code adapted from:
+// https://github.com/Rockncoder/TwitterTutorial/blob/master/src/com/example/TwitterTutorial/Tweet.java
+//
+// We changed the field names to conform to Java standards
+
+import com.google.gson.annotations.SerializedName;
+
+public class Tweet {
+
+	@SerializedName("created_at")
+	private String dateCreated;
+
+	@SerializedName("id")
+	private String id;
+
+	@SerializedName("text")
+	private String text;
+
+	@SerializedName("in_reply_to_status_id")
+	private String inReplyToStatusId;
+
+	@SerializedName("in_reply_to_user_id")
+	private String inReplyToUserId;
+
+	@SerializedName("in_reply_to_screen_name")
+	private String inReplyToScreenName;
+
+	@SerializedName("user")
+	private TwitterUser user;
+
+	public String getDateCreated() {
+		return dateCreated;
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	public String getInReplyToScreenName() {
+		return inReplyToScreenName;
+	}
+
+	public String getInReplyToStatusId() {
+		return inReplyToStatusId;
+	}
+
+	public String getInReplyToUserId() {
+		return inReplyToUserId;
+	}
+
+	public String getText() {
+		return text;
+	}
+
+	public void setDateCreated(String dateCreated) {
+		this.dateCreated = dateCreated;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public void setInReplyToScreenName(String inReplyToScreenName) {
+		this.inReplyToScreenName = inReplyToScreenName;
+	}
+
+	public void setInReplyToStatusId(String inReplyToStatusId) {
+		this.inReplyToStatusId = inReplyToStatusId;
+	}
+
+	public void setInReplyToUserId(String inReplyToUserId) {
+		this.inReplyToUserId = inReplyToUserId;
+	}
+
+	public void setText(String text) {
+		this.text = text;
+	}
+
+	public void setUser(TwitterUser user) {
+		this.user = user;
+	}
+
+	public TwitterUser getUser() {
+		return user;
+	}
+
+	@Override
+	public String toString() {
+		return getText();
+	}
+}

HW5/src/edu/uncc/itcs4180/hw5/twitter/TweetList.java

@@ -0,0 +1,12 @@
+package edu.uncc.itcs4180.hw5.twitter;
+
+import java.util.ArrayList;
+
+public class TweetList extends ArrayList<Tweet> {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+}

HW5/src/edu/uncc/itcs4180/hw5/twitter/TwitterAuthentication.java

@@ -0,0 +1,6 @@
+package edu.uncc.itcs4180.hw5.twitter;
+
+public class TwitterAuthentication {
+	String tokenType;
+	String accessToken;
+}

HW5/src/edu/uncc/itcs4180/hw5/twitter/TwitterClient.java

@@ -0,0 +1,145 @@
+package edu.uncc.itcs4180.hw5.twitter;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.UnsupportedEncodingException;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.text.BreakIterator;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.methods.HttpRequestBase;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.params.BasicHttpParams;
+
+import com.google.gson.Gson;
+
+import android.os.AsyncTask;
+import android.util.Base64;
+
+public class TwitterClient {
+	
+	private final String API_KEY = "HuEbvsXOxQsKVmTneyilVtsV6";
+	private final String API_SECRET = "ZIJqmKEGoQUKLCIit15SKz6XIl4PP1xgDm1jVCIBSDhmImzFqk";
+	
+	private final String URL_TOKEN = "https://api.twitter.com/oauth2/token";
+	private final String URL_API = "https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=";
+	
+	// Code mimicked in large part from:
+	// https://github.com/Rockncoder/TwitterTutorial/blob/master/src/com/example/TwitterTutorial/MainActivity.java
+	
+	public static TweetList getTweetList(String handle) {
+		TwitterClient tc = new TwitterClient();
+		try {
+			return tc.new TweetListDownloader().execute(handle).get();
+		} catch (InterruptedException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		} catch (ExecutionException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+		return null;
+	}
+	
+	private class TweetListDownloader extends AsyncTask<String, Void, TweetList> {
+
+		@Override
+		protected TweetList doInBackground(String... params) {
+			if (params.length > 0)
+				return getTweetList(params[0]);
+			else
+				return null;					
+		}
+		
+		private String getResponse(HttpRequestBase request) {
+			// Does all our HTTP work for us
+			StringBuilder sb = new StringBuilder();
+			
+			try {
+				DefaultHttpClient client = new DefaultHttpClient(new BasicHttpParams());
+				HttpResponse response;
+				response = client.execute(request);
+				int statusCode = response.getStatusLine().getStatusCode();
+				String reason = response.getStatusLine().getReasonPhrase();
+				
+				if (statusCode == 200) {
+					
+					HttpEntity entity = response.getEntity();
+					InputStream input = entity.getContent();
+					BufferedReader br = new BufferedReader(new InputStreamReader(input));
+					String line = null;
+					while ((line = br.readLine()) != null)
+						sb.append(line);
+					
+				} else
+					sb.append(reason);
+				
+			} catch (ClientProtocolException e) {
+			} catch (IOException e) {
+			}
+			
+			
+			return sb.toString();
+		}
+		
+		private TwitterAuthentication responseToAuth(String response) {
+			TwitterAuthentication auth = null;
+			if (response != null && response.length() > 0) {
+				Gson gson = new Gson();
+				auth = gson.fromJson(response, TwitterAuthentication.class);
+			}
+			
+			return auth;
+		}
+		
+		private TweetList responseToTweets(String response) {
+			TweetList tweets = null;
+			if (response != null && response.length() > 0) {
+				Gson gson = new Gson();
+				// We have to use TweetList because ArrayList<Tweet>.class doesn't exist
+				tweets = gson.fromJson(response, TweetList.class);
+			}
+			return tweets;
+		}
+		
+		private TweetList getTweetList(String handle) {
+			try {
+				// Set up our keys
+				String urlApiKey = URLEncoder.encode(API_KEY, "UTF-8");
+				String urlApiSecret = URLEncoder.encode(API_SECRET, "UTF-8");
+				String combined = urlApiKey + ":" + urlApiSecret;
+				String b64Encoded = Base64.encodeToString(combined.getBytes(), Base64.NO_WRAP);
+				
+				// Get our token
+				HttpPost post = new HttpPost(URL_TOKEN);
+				post.setHeader("Authorization", "Basic " + b64Encoded);
+				post.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
+				post.setEntity(new StringEntity("grant_type=client_credentials"));
+				TwitterAuthentication auth = responseToAuth(getResponse(post));
+				
+				// And now get our actual tweets list
+				HttpGet get = new HttpGet(URL_API + handle);
+				get.setHeader("Authorization", "Bearer " + auth.accessToken);
+				get.setHeader("Content-Type", "application/json");
+				return responseToTweets(getResponse(get));
+			} catch (UnsupportedEncodingException e) {
+				// TODO Auto-generated catch block
+				e.printStackTrace();
+			}
+			
+			return null;
+		}
+		
+	}
+}

HW5/src/edu/uncc/itcs4180/hw5/twitter/TwitterUser.java

@@ -0,0 +1,42 @@
+package edu.uncc.itcs4180.hw5.twitter;
+
+// Code copied from:
+// https://github.com/Rockncoder/TwitterTutorial/blob/master/src/com/example/TwitterTutorial/TwitterUser.java
+
+import com.google.gson.annotations.SerializedName;
+
+public class TwitterUser {
+
+	@SerializedName("screen_name")
+	private String screenName;
+
+	@SerializedName("name")
+	private String name;
+
+	@SerializedName("profile_image_url")
+	private String profileImageUrl;
+
+	public String getProfileImageUrl() {
+		return profileImageUrl;
+	}
+
+	public String getScreenName() {
+		return screenName;
+	}
+
+	public void setProfileImageUrl(String profileImageUrl) {
+		this.profileImageUrl = profileImageUrl;
+	}
+
+	public void setScreenName(String screenName) {
+		this.screenName = screenName;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+}