updates

Author: SHARVAI101

EnglishMeme.jpg

@@ -0,0 +1,108 @@
+<?php
+
+session_start();
+
+include 'dbh.php';
+
+if(isset($_SESSION['id'])){
+	//this code segment will be executed if the user has logged in
+	$userId=mysqli_real_escape_string($conn,$_SESSION['id']);
+	$username=mysqli_real_escape_string($conn,$_SESSION['username']);
+	$likes=mysqli_real_escape_string($conn,$_POST['numberOfLikes']);//incrementing number of likes
+	$id=mysqli_real_escape_string($conn,$_POST['id']);//the answer reply id
+	$flag=true;//flag to see if user has already liked a reply
+	$flag1=true;//flag to see if the user is liking his own reply
+
+	//checking if the person who has posted the reply himself is trying to like it
+	$sql3= "SELECT replyByUserId FROM answerrepliestable WHERE id='$id'";
+	$result3=mysqli_query($conn,$sql3);
+	$row3=mysqli_fetch_assoc($result3);
+	if($row3['replyByUserId']==$userId){//searching for userId instead of user name is very efficient(comparing integers is actually super fast compared to searching strings)
+		//if user is trying to like his own reply
+		//$flag1=false;
+		echo 'user reply';//it is the user's own reply that he is trying to like
+	}
+	else{
+		//it is not his own reply
+		$uid=$row3['replyByUserId'];//jyachya reply la like kela zatay tyacha id uid ahe
+		//now checking if the user is liking a reply that he already has liked before
+		
+		$sql1= "SELECT likedByUserId FROM answerreplylikestable WHERE likedByuserId='$userId' AND replyId='$id'";
+		$result1=mysqli_query($conn,$sql1);
+		if($row=mysqli_fetch_assoc($result1)){	
+			//this means if the user has already liked the comment
+			$likes=$likes-1;
+
+			$sql="UPDATE answerrepliestable SET likes='$likes' WHERE id='$id'";//updating database 
+			$result=mysqli_query($conn,$sql);
+
+			//deleting meme liking info into likestable			
+			$sql2="DELETE FROM answerreplylikestable WHERE replyId='$id'";
+			$result2=mysqli_query($conn,$sql2);
+
+			//decreasing 0.5 point of the replier on account of the undo-like
+			$sql3="UPDATE memberstable SET points=points-0.5 WHERE id='$uid'";
+			$result3=mysqli_query($conn,$sql3);
+
+			//removing notification from uploader's feed
+			$sql4="DELETE FROM notifications_table WHERE receiverId='$uid' AND senderId='$userId' AND notificationType='answerReplyLike' AND notificationForEventId='$id'";
+			$result4=mysqli_query($conn,$sql4);
+
+			//echo 'undo like';
+			echo htmlentities($likes);
+		}
+		else{
+			//user has not already liked the reply
+
+			//here, is the reply liking actual code
+			$likes=$likes+1;
+			$sql="UPDATE answerrepliestable SET likes='$likes' WHERE id='$id'";//updating database 
+			$result=mysqli_query($conn,$sql);
+
+			//inserting reply liking info into replylikestable			
+			$sql2="INSERT INTO answerreplylikestable (replyId, likedByUserId) VALUES ('$id','$userId')";
+			$result2=mysqli_query($conn,$sql2);
+
+			//increasing 0.5 point of the replier on account of the undo-like
+			$sql3="UPDATE memberstable SET points=points+0.5 WHERE id='$uid'";
+			$result3=mysqli_query($conn,$sql3);
+
+			//updating notification
+			date_default_timezone_set('Asia/Kolkata');//setting the timezone
+			$datetime=date('Y-m-d H:i:s');			
+
+			$sql01="SELECT username FROM memberstable WHERE id='$userId'";//getting notification sender's username
+			$result01=mysqli_query($conn,$sql01);
+			$row01=mysqli_fetch_assoc($result01);
+			$senderUsername=$row01['username'];
+
+			$sql02="SELECT reply,replyToAnswerId FROM answerrepliestable WHERE id='$id'";
+			$result02=mysqli_query($conn,$sql02);
+			$row02=mysqli_fetch_assoc($result02);
+			$reply=$row02['reply'];
+			$answerId=$row02['replyToAnswerId'];
+
+			$sql03="SELECT answerForQuestionId FROM answerstable WHERE id='$answerId'";
+			$result03=mysqli_query($conn,$sql03);
+			$row03=mysqli_fetch_assoc($result03);
+			$questionId=$row03['answerForQuestionId'];
+
+			$replyForNotification=(strlen($reply) > 13) ? substr($reply,0,10).'...' : $reply;
+			$replydivname="answerreply_div".$id;
+
+			$notificationString=$senderUsername.' liked your reply "'.$replyForNotification.'"';
+			$notificationType="answerReplyLike";
+			$notificationLink='questiondisplay.php?id='.$questionId.'#'.$replydivname;
+
+			$sql4="INSERT INTO notifications_table (senderId,receiverId,notificationType,notification,notificationLink,viewingStatus,datetime,notificationForEventId) VALUES ('$userId','$uid','$notificationType','$notificationString','$notificationLink',0,'$datetime','$id')";
+			$result4=mysqli_query($conn,$sql4);
+
+			echo htmlentities($likes);//sending back info to questiondisplay.php
+		}
+	}
+		
+}
+else{
+	echo 'login error';
+}
+