Root Explorer PHP

Editing: group_buy.php

<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);

require_once('config.php');

// ================= SESSION SAFETY =================
if (session_status() == PHP_SESSION_NONE) {
    session_start();
}

// ================= CSRF =================
if (empty($_SESSION['csrf_token'])) {
    $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}
$csrf_token = $_SESSION['csrf_token'];

// ================= INPUT =================
$group_id = isset($_GET['group_id']) ? intval($_GET['group_id']) : 0;

// ================= GROUP DATA =================
$query = $conn->prepare("
    SELECT 
        gp.*,
        p.id as product_id,
        p.product_name,
        p.description,
        p.city
    FROM group_products gp
    INNER JOIN products p ON gp.product_id = p.id
    WHERE gp.id = ? AND gp.status = 'open'
");
$query->bind_param("i", $group_id);
$query->execute();
$result = $query->get_result();
$group = $result->fetch_assoc();
$query->close();

if (!$group) {
    die(json_encode(['status' => 'failed', 'error' => 'Group deal not found']));
}

// ================= INVENTORY =================
$inventory_query = $conn->prepare("
    SELECT * FROM inventory 
    WHERE product_id = ? 
    AND quantity > 0 
    ORDER BY price ASC
");
$inventory_query->bind_param("i", $group['product_id']);
$inventory_query->execute();
$inventory_result = $inventory_query->get_result();

$variations = [];
while ($inv = $inventory_result->fetch_assoc()) {
    $inv['group_price'] = $inv['price'] - ($inv['price'] * $group['group_discount'] / 100);
    $variations[] = $inv;
}
$inventory_query->close();

// ================= BOOKINGS =================
$bookings_query = $conn->prepare("
    SELECT SUM(quantity) as total 
    FROM group_orders 
    WHERE group_product_id = ? AND status != 'cancelled'
");
$bookings_query->bind_param("i", $group_id);
$bookings_query->execute();
$bookings_result = $bookings_query->get_result();
$bookings = $bookings_result->fetch_assoc();
$bookings_query->close();

$current_bookings = $bookings['total'] ?? 0;
$available_slots = max(0, $group['max_group_size'] - $current_bookings);
$needed_to_confirm = max(0, $group['min_group_size'] - $current_bookings);
$min_group_reached = ($current_bookings >= $group['min_group_size']);

// If no variations found, provide a safe default for JavaScript
if (empty($variations)) {
    $variations = [];
}
?>

<div class="form-group">
            <div class="form-control-plaintext font-weight-bold h5">
                <strong><?= htmlspecialchars($group['product_name']) ?></strong>
            </div>
            <div class="small text-muted">
                <i class="fas fa-map-marker-alt"></i> <?= htmlspecialchars($group['city'] ?? 'Your City') ?>
            </div>
            <div class="small text-muted mt-2">
                <span class="badge badge-success">-<?= $group['group_discount'] ?>% OFF</span>
                <span class="badge badge-info ml-2">Group Buy Deal</span>
            </div>
            <div class="small text-muted mt-2">
                <i class="fas fa-calendar-alt"></i> Valid until: <?= date('M d, Y', strtotime($group['end_date'])) ?>
            </div>
        </div>

<div class="alert <?= $min_group_reached ? 'alert-success' : 'alert-warning' ?> p-2">
            <div class="d-flex justify-content-between mb-1">
                <span>Group Status:</span>
                <span><strong><?= $current_bookings ?> / <?= $group['min_group_size'] ?></strong> minimum</span>
            </div>
            <div class="progress" style="height: 8px;">
                <div class="progress-bar <?= $min_group_reached ? 'bg-success' : 'bg-warning' ?>" 
                     style="width: <?= min(100, ($current_bookings / $group['min_group_size']) * 100) ?>%"></div>
            </div>
            <?php if (!$min_group_reached): ?>
                <div class="small mt-2">
                    <i class="fas fa-exclamation-triangle"></i> Need <?= $needed_to_confirm ?> more to activate group price!
                </div>
            <?php else: ?>
                <div class="small mt-2 text-success">
                    <i class="fas fa-check-circle"></i> Group discount activated! Minimum reached.
                </div>
            <?php endif; ?>
        </div>

<?php if (count($variations) > 0): ?>
        <div class="form-group">
            <label>Select Size/Unit</label>
            <select class="form-control" name="variation" id="variation_select" required>
                <?php foreach ($variations as $index => $var): ?>
                    <option value="<?= $index ?>" 
                            data-id="<?= $var['id'] ?>"
                            data-price="<?= $var['price'] ?>"
                            data-group-price="<?= $var['group_price'] ?>"
                            data-stock="<?= $var['quantity'] ?>"
                            data-size="<?= htmlspecialchars($var['size'] . ' ' . $var['unit']) ?>">
                        <?= htmlspecialchars($var['size'] . ' ' . $var['unit']) ?> - 
                        ₹<?= number_format($var['group_price'], 2) ?> 
                        (Regular: ₹<?= number_format($var['price'], 2) ?>)
                        <?php if ($var['weight'] > 0): ?> | <?= $var['weight'] ?>g <?php endif; ?>
                        | Stock: <?= $var['quantity'] ?>
                    </option>
                <?php endforeach; ?>
            </select>
        </div>
        <?php endif; ?>

<div class="form-group">
            <label>Quantity</label>
            <div class="input-group">
                <div class="input-group-prepend">
                    <button class="btn btn-outline-secondary" type="button" id="qty_minus">-</button>
                </div>
                <input class="form-control text-center" type="number" value="1" min="1" 
                       max="<?= min($available_slots, $variations[0]['quantity'] ?? 1) ?>" 
                       name="quantity" id="quantity" required>
                <div class="input-group-append">
                    <button class="btn btn-outline-secondary" type="button" id="qty_plus">+</button>
                </div>
            </div>
            <small class="text-muted" id="stock_info">
                Max <?= min($available_slots, $variations[0]['quantity'] ?? 1) ?> available 
                (Group slots: <?= $available_slots ?>, Stock: <?= $variations[0]['quantity'] ?? 0 ?>)
            </small>
        </div>

<div class="card bg-light mb-3">
            <div class="card-body p-3">
                <div class="row">
                    <div class="col-6">
                        <small class="text-muted d-block">Regular Price</small>
                        <span class="text-muted" style="text-decoration: line-through;" id="regular_price_display">
                            ₹<?= number_format($variations[0]['price'] ?? 0, 2) ?>
                        </span>
                    </div>
                    <div class="col-6 text-right">
                        <small class="text-muted d-block">Unit Price</small>
                        <span class="h5 text-primary font-weight-bold" id="unit_price_display">
                            ₹<?= number_format($variations[0]['group_price'] ?? 0, 2) ?>
                        </span>
                    </div>
                </div>
                <hr class="my-2">
                <div class="d-flex justify-content-between align-items-center">
                    <span class="font-weight-bold">Total Amount:</span>
                    <span class="h4 text-success font-weight-bold" id="total_amount">
                        ₹<?= number_format($variations[0]['group_price'] ?? 0, 2) ?>
                    </span>
                </div>
                <input type="hidden" name="amount" id="amount_input" value="<?= $variations[0]['group_price'] ?? 0 ?>">
            </div>
        </div>

<div class="form-group">
            <label>Delivery Address</label>
            <textarea class="form-control" name="delivery_address" rows="2" 
                      placeholder="Please provide your delivery address" required></textarea>
            <small class="text-muted">Same day delivery available across <?= htmlspecialchars($group['city'] ?? 'your city') ?></small>
        </div>

<div class="form-group">
            <label>Contact Number</label>
            <input type="tel" class="form-control" name="contact" placeholder="Your mobile number" required>
        </div>

<div class="form-group">
            <label>Additional Notes (Optional)</label>
            <textarea class="form-control" name="notes" rows="2" 
                      placeholder="Any special instructions..."></textarea>
        </div>

<div class="text-right">
            <button type="submit" class="btn btn-primary btn-lg" <?= $available_slots <= 0 ? 'disabled' : '' ?>>
                <i class="fas fa-users"></i> Join Group Buy
            </button>
            <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
        </div>

<?php if ($available_slots <= 0): ?>
            <div class="alert alert-danger mt-3">
                <i class="fas fa-exclamation-circle"></i> Sorry, this group buy is fully booked!
            </div>
        <?php endif; ?>
    </form>
</div>

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📄 group_buy.php	FILE	[EDIT]
📄 group_payment(partly).php	FILE	[EDIT]
📄 group_payment.php	FILE	[EDIT]
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Editing: group_buy.php