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create_ladder.php

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<?php
require "auth.php";
require "database.php";
require "functions.php";
requireLogin();

$error = "";

if ($_SERVER["REQUEST_METHOD"] === "POST") {
    if (!$_POST["ladder_name"]) {
        $error = "Ladder name required";
    } else {
        $conn->beginTransaction();
        $inviteCode = generateInviteCode();

        try {
            // Create ladder
            $stmt = $conn->prepare(
                "INSERT INTO Ladder (LadderName, OwnerPlayerID, InviteCode)
                 VALUES (?, ?, ?)"
            );
            $stmt->execute([
                $_POST["ladder_name"],
                $_SESSION["player_id"],
                $inviteCode
            ]);

            $ladderID = $conn->lastInsertId();

            // Add creator to ladder
            $stmt = $conn->prepare(
                "INSERT INTO LadderPlayers (PlayerID, LadderID)
                 VALUES (?, ?)"
            );
            $stmt->execute([
                $_SESSION["player_id"],
                $ladderID
            ]);

            $conn->commit();
            header("Location: ladder.php?id=" . $ladderID);
            exit;

        } catch (Exception $e) {
            $conn->rollBack();
            $error = "Something went wrong";
            die("ERROR: " . $e->getMessage());
        }
    }
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Create Ladder</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container mt-5">
    <h2>Create Ladder</h2>

    <?php if ($error): ?>
        <div class="alert alert-danger"><?= $error ?></div>
    <?php endif; ?>

    <form method="POST">
        <input class="form-control mb-2" name="ladder_name" placeholder="Ladder name">
        <button class="btn btn-success">Create</button>
        <a href="dashboard.php" class="btn btn-secondary">Cancel</a>
    </form>
</div>
</body>
</html>