Fixed Null Date error

MHealth_GroupFBScraper/src/Main.java

@@ -1,15 +1,19 @@
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Scanner;
 
 import com.opencsv.CSVWriter;
 import com.restfb.*;
 import com.restfb.types.Group;
+import com.restfb.types.Likes;
 import com.restfb.types.Post;
 
 /**
@@ -25,23 +29,25 @@ public class Main {
 	 */
 	public static void main(String[] args) {
 
-		String accessToken = "EAALA0FZC8s14BAHoSr3OBZBh5OZBmtx5AZCTWyeLP8kKR3gNsaK6YWS1gWCcaKZAQNU7GWh3b8iQIEwcld0nQFIF7azfEw0ZChMxP05idWBhd2BQNZAuY9eLKxDuhjmEboTv4ZBz7hwQDe13CeXajnNOMU4A8zNZB5niZBiDHtMuapwdRXYAvwa9mLcM5KAXWYIG8Oo4QWMD6hogZDZD";
-
+		String accessToken = "EAALA0FZC8s14BACP7C9wRohgnBbgGbMmmCnZBjPDcQbGf6ZA1oro7vyZB9ABBYyjKEABrOZA8UNT7rhTW9CDzEZANKzxPdD3JKkbCcL6KpiUmke0gXLIxbE23ZCn91hECSF8VH0oWDPtGeA2Hxmcp6erocnSiQMCFYiY5LHPvJQefNPci5m13QHKE00z2GybB4cIu4mnpZBOJwZDZD";
 		// Token expires daily - facebook auth needed for permanent one or app needs to login with facebook
 		Scanner input = new Scanner(System.in);
 
 		FacebookClient fbClient = new DefaultFacebookClient(accessToken, Version.VERSION_3_1);
 
 		Connection<Group> userGroups = fbClient.fetchConnection("me/groups", Group.class);
-		for(List<Group> page : userGroups) {
+		//get the iterator
+		Iterator<List<Group>> groupIt = userGroups.iterator();
+		while(groupIt.hasNext()) {
+			List<Group> page = groupIt.next();
 			for(Group currGroup : page) {
-				// This loop doesn't make any sense I should replace it
+
 				//System.out.println("Do you want to get posts from "+currGroup.getName()+" ? Yes/NO"); // Eventually switch to GUI
 				//String response = input.nextLine();
 				//if(response.equals("Yes")) {
 				// Removed above lines for testing (will need them in the future but not now since I'm only testing on one group)
 				if(currGroup.getId().equals("250530099176185")){
-					Connection<Post> postFeed = fbClient.fetchConnection(currGroup.getId()+"/feed", Post.class, Parameter.with("fields","from,actions,message,likes,reactions, story"));
+					Connection<Post> postFeed = fbClient.fetchConnection(currGroup.getId()+"/feed", Post.class, Parameter.with("fields","from,actions,message,likes,reactions,story,type,link,picture,created_time"));
 					// Note - ask Jess if they want to be able to specify a start date / end date when pulling data
 					writeCSVData(currGroup, postFeed);
 				}
@@ -63,24 +69,49 @@ public class Main {
 		 * shares - headers: Id, UserId, UserName, CreatedTime, StatusType, Message, Story, Link, Picture
 		 * 
 		 */
-		DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd.MM.yyyy");
+		Iterator<List<Post>> it = postFeed.iterator();
+		DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd.MM.yyyy hh.mm.ss");
 		LocalDateTime now = LocalDateTime.now();
+        DateFormat csvDateFormat = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");  
 	    try {
+	    	// Should first create a folder then put all of these files in that folder with the date
 	    	File file = new File("Health Chat_chat_feed_"+currGroup.getName()+"_"+dtf.format(now)+".csv"); // Filepath needs to be more specific in final
 	    	FileWriter outputfile = new FileWriter(file);
 		    // create CSVWriter object filewriter object as parameter 
-			CSVWriter writer = new CSVWriter(outputfile);
+			CSVWriter chatWriter = new CSVWriter(outputfile);
 			List<String[]> chat_data = new ArrayList<String[]>();
 			chat_data.add(new String[] {"Id", "UserId", "UserName", "CreatedTime", "StatusType", "Message", "Story", "Link", "Picture"});
 
-	    	for(List<Post> getPosts : postFeed) {
+	    	while(it.hasNext()) {
+	    		List<Post> feedPage = it.next();
 				//Create a list of posts from the post feed Y
-				for(Post currPost : getPosts) {
-					chat_data.add(new String[] {currPost.getId(), currPost.getFrom().getId(), currPost.getFrom().getName(), "Date", currPost.getType(), currPost.getMessage(), currPost.getStory(), currPost.getLink(), currPost.getPicture()});	
+				for(Post currPost : feedPage) {
+					String id = currPost.getId();
+					String UserId = currPost.getFrom().getId();
+					String UserName = currPost.getFrom().getName();
+					String CreatedTime = csvDateFormat.format(currPost.getCreatedTime());
+					String type = currPost.getType();
+					String message = currPost.getMessage();
+					String story = currPost.getStory();
+					String link = "fb.com/"+id;
+					String pic = currPost.getPicture();
+
+					//IF post isnt shared, add to chat_data file
+					chat_data.add(new String[] {id,UserId,UserName,CreatedTime,type,message,story,link,pic});
+					//else add to shares file
+					if(currPost.getLikesCount() > 0) {
+						//add to the likes.csv file
+					}
+					if (currPost.getReactionsCount() > 0) {
+						//add to the reactions.csv file
+					}
+					if (currPost.getCommentsCount() > 0) {
+						//add to the comments.csv file
+					}
 				}
 			}
-	    	writer.writeAll(chat_data);
-	    	writer.close();
+	    	chatWriter.writeAll(chat_data);
+	    	chatWriter.close();
 
 		} catch (IOException e) {
 			// TODO Auto-generated catch block