<?php  
$page_title = 'Import Students';
include 'header.php';
?>
<div class="content-wrapper">
	<section class="content mt-4">
		<div class="container-fluid">
			<div class="row">
				<div class="col-md-12">
					<?php include('alert-msg.php'); ?>
					<div class="card card-primary">
						<div class="card-header">
							<h3 class="card-title"><?php echo $page_title; ?></h3>
						</div>
						<form action="" method="POST" enctype="multipart/form-data">
							<div class="card-body">
								<div class="row">
									<div class="col-md-6">
										<div class="form-group">
											<label for="exampleInputFile">Upload Excel File</label>
											<a href="downloads/student_upload.csv" download="student_upload.csv">CSV Format File Format</a>
											<div class="input-group">
												<div class="custom-file">
													<input type="file" class="custom-file-input fileUpload_allow_csv" name="upload_format" accept=".csv" id="exampleInputFile" required>
													<label class="custom-file-label" for="exampleInputFile">Choose file</label>
												</div>
											</div>
										</div>
									</div>
								</div>
								<button type="submit" class="btn btn-primary" name="btnSubmit">Submit</button>
							</div>
						</form>
					</div>

					<div class="card card-primary">
						<div class="card-header">
							<h3 class="card-title">Student List</h3>
						</div>
						<form action="" method="POST" enctype="multipart/form-data">
							<div class="card-body">
								<table class="table table-bordered table-striped main_datatables">
									<thead>
										<tr>
											<th>Sr. No.</th>
											<th>Student Name</th>
											<th>Roll Number</th>
											<th>Reg. No.</th>
											<th>Class</th>
											<th>Division</th>
											<th>Username</th>
											<th>Password</th>
											<th>Action</th>
										</tr>
									</thead>
									<tbody>
										<?php
										$sel_students=mysqli_query($con,'select * from students order by class,division,roll_number asc');
										$i=1;
										while($row_students=mysqli_fetch_array($sel_students))
										{

											?>
											<tr>
												<td><?php echo $i; ?></td>
												<td><?php echo $row_students['name']; ?></td>
												<td><?php echo $row_students['roll_number']; ?></td>
												<td><?php echo $row_students['reg_no']; ?></td>
												<td><?php echo $row_students['class']; ?></td>
												<td><?php echo $row_students['division']; ?></td>
												<td><?php echo $row_students['username']; ?></td>
												<td><?php echo $row_students['password']; ?></td>
												<td>
													<a href="student-delete.php?id=<?php echo $row_students['id']; ?>" onclick="return confirm('Are you sure you want to delete ?');" class="btn btn-sm btn-danger"><i class="fas fa-trash"></i></a>
												</td>
											</tr>
											<?php
											$i=$i+1;
										}
										?>
									</tbody>
								</table>
							</div>
						</form>
					</div>
				</div>
			</div>
		</div>
	</section>
</div>
<?php include 'footer.php'; ?>


<?php
if(isset($_POST['btnSubmit']))
{
	$filename=$_FILES["upload_format"]["tmp_name"];

	if($_FILES["upload_format"]["size"] > 0)
	{
		$file = fopen($filename, "r");
		$students=0;
		$row_count=0;
		while (($emapData = fgetcsv($file, 10000, ",")) !== FALSE)
		{
			if($row_count>0)
			{
				$name = $emapData[0];
				$roll_number = $emapData[1];
				$reg_no = $emapData[2];
				$class = $emapData[3];
				$division = $emapData[4];
				$username = $emapData[5];
				$password = $emapData[6];
				$ins = mysqli_query($con,"INSERT INTO `students` (`name`, `roll_number`, `reg_no`, `class`, `division`, `username`, `password`) VALUES ('$name', '$roll_number', '$reg_no', '$class', '$division', '$username', '$password')");
				if($ins)
				{
					$students=$students+1;
				}
			}
			$row_count = $row_count + 1;
		}

		if($students>0)
		{
			$_SESSION['success_msg'] = $students.' students are imported...';
			echo"<script>window.location='import-students.php';</script>";
		}
		else
		{
			$_SESSION['error_msg'] = 'Unable to import students...';
			echo"<script>window.location='import-students.php';</script>";
		}
	}
	else
	{
		$_SESSION['error_msg'] = 'Have not data in uploaded file...';
		echo"<script>window.location='import-students.php';</script>";
	}

}
?>