profile.php

<?php 
include("includes/header.php");

$message_obj = new Message($con, $userLoggedIn);

if(isset($_GET['profile_username'])) {
  $username = $_GET['profile_username'];
  $user_details_query = mysqli_query($con, "SELECT * FROM users WHERE username='$username'");

  if(mysqli_num_rows($user_details_query) == 0) {
    echo "User does not exist";
    exit();
  }

  $user_array = mysqli_fetch_array($user_details_query);

  $num_friends = (substr_count($user_array['friend_array'], ",")) - 1;
}


if(isset($_POST['remove_friend'])) {
  $user = new User($con, $userLoggedIn);
  $user->removeFriend($username);
}

if(isset($_POST['add_friend'])) {
  $user = new User($con, $userLoggedIn);
  $user->sendRequest($username);
}

if(isset($_POST['respond_request'])) {
  header("Location: requests.php");
}

if(isset($_POST['cancel_request'])) {
  $user = new User($con, $userLoggedIn);
  $user->cancelRequest($username);
}

if(isset($_POST['post_message'])) {
  if(isset($_POST['message_body'])) {
    $body = mysqli_real_escape_string($con, $_POST['message_body']);
    $date = date("Y-m-d H:i:s");
    $message_obj->sendMessage($username, $body, $date);
  }

  $link = '#profileTabs a[href="#messages_div"]';
  echo "<script> 
          $(function() {
              $('" . $link ."').tab('show');
          });
        </script>";


}

 ?>

  <style type="text/css">
    .wrapper {
      margin-left: 0px;
      padding-left: 0px;
    }
  </style>
  
  <div class="profile_left">
    <img src="<?php echo $user_array['profile_pic']; ?>">

    <div class="profile_info">
      <p><?php echo "Posts: " . $user_array['num_post']; ?></p>
      <p><?php echo "Likes: " . $user_array['num_likes']; ?></p>
      <p><?php echo "Friends: " . $num_friends ?></p>
      <p><a href="friends.php">View friends</a></p>
    </div>

    <form action="<?php echo $username; ?>" method="POST">
      <?php 
      $profile_user_obj = new User($con, $username); 
      if($profile_user_obj->isClosed()) {
        header("Location: user_closed.php");
      }

      $logged_in_user_obj = new User($con, $userLoggedIn); 

      if($userLoggedIn != $username) {

        if($logged_in_user_obj->isFriend($username)) {
          echo '<input type="submit" name="remove_friend" class="danger" value="Remove Friend"><br>';
        }
        else if ($logged_in_user_obj->didReceiveRequest($username)) {
          echo '<input type="submit" name="respond_request" class="warning" value="Respond to Request"><br>';
        }
        else if ($logged_in_user_obj->didSendRequest($username)) {
          echo '<input type="submit" name="cancel_request" class="default" value="Request Sent"><br>';
        }
        else 
          echo '<input type="submit" name="add_friend" class="success" value="Add Friend"><br>';

      }

      ?>
    </form>
    <input type="submit" class="deep_blue" data-toggle="modal" data-target="#post_form" value="Post Something">

    <?php  
    if($userLoggedIn != $username) {
      echo '<div class="profile_info_bottom">';
        echo $logged_in_user_obj->getMutualFriends($username) . " Mutual friends";
      echo '</div>';
    }


    ?>

  </div>


  <div class="profile_main_column column">

    <ul class="nav nav-tabs" role="tablist" id="profileTabs">
      <li role="presentation" class="active"><a href="#newsfeed_div" aria-controls="newsfeed_div" role="tab" data-toggle="tab">Newsfeed</a></li>
      <li role="presentation"><a href="#messages_div" aria-controls="messages_div" role="tab" data-toggle="tab">Messages</a></li>
    </ul>

    <div class="tab-content">

      <div role="tabpanel" class="tab-pane active" id="newsfeed_div">
        <div class="posts_area"></div>
        <img id="loading" src="assets/images/icons/loading.gif">
      </div>


      <div role="tabpanel" class="tab-pane" id="messages_div">
        <?php  
        

          echo "<h4>You and <a href='" . $username ."'>" . $profile_user_obj->getFirstAndLastName() . "</a></h4><hr><br>";

          echo "<div class='loaded_messages' id='scroll_messages'>";
            echo $message_obj->getMessages($username);
          echo "</div>";
        ?>



        <div class="message_post">
          <form action="" method="POST">
              <textarea name='message_body' id='message_textarea' placeholder='Write your message ...'></textarea>
              <input type='submit' name='post_message' class='info' id='message_submit' value='Send'>
          </form>

        </div>

        <script>
          $('a[data-toggle="tab"]').on('shown.bs.tab', function () {
              var div = document.getElementById("scroll_messages");
              div.scrollTop = div.scrollHeight;
          });
        </script>
      </div>


    </div>


  </div>

<!-- Modal -->
  <div class="modal fade" id="post_form" tabindex="-1" role="dialog" aria-labelledby="postModalLabel" aria-hidden="true">
    <div class="modal-dialog">
      <div class="modal-content">

        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
          <h4 class="modal-title" id="postModalLabel">Post something</h4>
        </div>

        <div class="modal-body">
          <p>This will appear on the newsfeed for your friends to see. </p>

          <form class="profile_post" action="profile.php" method="POST" enctype="multipart/form-data">
            <div class="form-group">
              <textarea class="form-control" name="post_body"></textarea>
              <input type="hidden" name="user_from" value="<?php echo $userLoggedIn; ?>">
              <input type="hidden" name="user_to" value="<?php echo $username; ?>">
            </div>
          </form>
        </div>

        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
          <button type="button" class="btn btn-primary" name="post_button" id="submit_profile_post">Post</button>
        </div>
      </div>
    </div>
  </div>


<!-- <script>
  var userLoggedIn = '<?php echo $userLoggedIn; ?>';
  var profileUsername = '<?php echo $username; ?>';

  $(document).ready(function() {

    $('#loading').show();

    //Original ajax request for loading first posts 
    $.ajax({
      url: "includes/handlers/ajax_load_profile_posts.php",
      type: "POST",
      data: "page=1&userLoggedIn=" + userLoggedIn + "&profileUsername=" + profileUsername,
      cache:false,

      success: function(data) {
        $('#loading').hide();
        $('.posts_area').html(data);
      }
    });

    $(window).scroll(function() {
      var height = $('.posts_area').height(); //Div containing posts
      var scroll_top = $(this).scrollTop();
      var page = $('.posts_area').find('.nextPage').val();
      var noMorePosts = $('.posts_area').find('.noMorePosts').val();

      if ((document.body.scrollHeight == document.body.scrollTop + window.innerHeight) && noMorePosts == 'false') {
        $('#loading').show();

        var ajaxReq = $.ajax({
          url: "includes/handlers/ajax_load_profile_posts.php",
          type: "POST",
          data: "page=" + page + "&userLoggedIn=" + userLoggedIn + "&profileUsername=" + profileUsername,
          cache:false,

          success: function(response) {
            $('.posts_area').find('.nextPage').remove(); //Removes current .nextpage 
            $('.posts_area').find('.noMorePosts').remove(); //Removes current .nextpage 
            $('.posts_area').find('.noMorePostsText').remove(); //Removes current .nextpage 

            $('#loading').hide();
            $('.posts_area').append(response);
              
          }
        });

      } //End if 

      return false;

    }); //End (window).scroll(function())


  });

  </script> -->

  <script>
 
 $(function(){
 
         var userLoggedIn = '<?php echo $userLoggedIn; ?>';
        var profileUsername = '<?php echo $username; ?>';
       var inProgress = false;
  
         loadPosts(); //Load first posts
  
         $(window).scroll(function() {
             var bottomElement = $(".status_post").last();
             var noMorePosts = $('.posts_area').find('.noMorePosts').val();            
         
             // isElementInViewport uses getBoundingClientRect(), which requires the HTML DOM object, not the jQuery object. The jQuery equivalent is using [0] as shown below.
             if (isElementInView(bottomElement[0]) && noMorePosts == 'false') {
             loadPosts();
            }
         });
  
         function loadPosts() {
             if(inProgress) { //If it is already in the process of loading some posts, just return
             return;
             }
           
             inProgress = true;
             $('#loading').show();
  
             var page = $('.posts_area').find('.nextPage').val() || 1; //If .nextPage couldn't be found, it must not be on the page yet (it must be the first time loading posts), so use the value '1'
  
             $.ajax({
                 url: "includes/handlers/ajax_load_profile_posts.php",
                 type: "POST",
                 data: "page="+page+"&userLoggedIn=" + userLoggedIn + "&profileUsername=" + profileUsername,
                 cache:false,
  
                 success: function(response) {
                     $('.posts_area').find('.nextPage').remove(); //Removes current .nextpage
                     $('.posts_area').find('.noMorePosts').remove(); //Removes current .nextpage
                     $('.posts_area').find('.noMorePostsText').remove(); //Removes current .nextpage
  
                     $('#loading').hide();
                     $(".posts_area").append(response);
  
                     inProgress = false;
                 }
             });
         }
  
         //Check if the element is in view
         function isElementInView (el) {
             if(el == null) {
                 return;
             }
  
             var rect = el.getBoundingClientRect();
  
             return (
                 rect.top >= 0 &&
                 rect.left >= 0 &&
                 rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && //* or $(window).height()
                 rect.right <= (window.innerWidth || document.documentElement.clientWidth) //* or $(window).width()
             );
         }
     });
 </script>





  </div>
</body>
</html>