<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Upload CSV File</title>
</head>
<body>
<h1>Upload CSV File</h1>
<!-- Display flash messages (only errors) -->
{% with messages = get_flashed_messages(category_filter=["error"]) %}
{% if messages %}
<details>
<summary>Errors found during submission (click to expand):</summary>
<ul>
{% for message in messages %}
<li>{{ message }}</li>
{% endfor %}
</ul>
</details>
{% endif %}
{% endwith %}
<!-- Upload form -->
<form action="/uploadcsv" method="POST" enctype="multipart/form-data">
<label for="file">Choose a CSV file:</label>
<input type="file" id="file" name="file" accept=".csv" required>
<br><br>
<button type="submit">Upload</button>
<button type="button" onclick="window.location.href='/'">Cancel</button>
</form>
</body>
</html>