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<?php
/**
* Subscription Helper Functions
* Functions to check subscription status and monthly track limits
*/
require_once __DIR__ . '/../config/database.php';
/**
* Check if user has active subscription
*/
function hasActiveSubscription($user_id) {
$pdo = getDBConnection();
$stmt = $pdo->prepare("
SELECT id, plan_name, status, current_period_start, current_period_end
FROM user_subscriptions
WHERE user_id = ?
AND status IN ('active', 'trialing')
AND current_period_end > NOW()
ORDER BY created_at DESC
LIMIT 1
");
$stmt->execute([$user_id]);
return $stmt->fetch(PDO::FETCH_ASSOC);
}
/**
* Check if subscription is in a state that allows track creation
* Returns true if subscription is active/trialing, false if past_due/canceled
*/
function isSubscriptionActiveForUsage($user_id) {
$pdo = getDBConnection();
$stmt = $pdo->prepare("
SELECT status
FROM user_subscriptions
WHERE user_id = ?
AND status IN ('active', 'trialing')
AND current_period_end > NOW()
ORDER BY created_at DESC
LIMIT 1
");
$stmt->execute([$user_id]);
$result = $stmt->fetch(PDO::FETCH_ASSOC);
return $result !== false;
}
/**
* Get or create monthly track usage record based on subscription period
*/
function getMonthlyTrackUsage($user_id, $plan_name = null) {
$pdo = getDBConnection();
// Get active subscription to determine current period
$subscription = hasActiveSubscription($user_id);
if (!$subscription) {
return null; // No subscription, no usage tracking
}
$subscription_id = $subscription['id'] ?? null;
$period_start = $subscription['current_period_start'] ?? null;
if (!$period_start) {
return null;
}
// Convert period_start to datetime string if it's not already
if (is_numeric($period_start)) {
$period_start = date('Y-m-d H:i:s', $period_start);
}
// If plan_name not provided, get it from subscription
if (!$plan_name) {
$plan_name = $subscription['plan_name'];
}
// Get or create usage record for this subscription period
$stmt = $pdo->prepare("
SELECT * FROM monthly_track_usage
WHERE user_id = ? AND subscription_period_start = ?
");
$stmt->execute([$user_id, $period_start]);
$usage = $stmt->fetch(PDO::FETCH_ASSOC);
if (!$usage) {
// Determine track limit based on plan
$track_limit = 0;
$plans_config = require __DIR__ . '/../config/subscription_plans.php';
if (isset($plans_config[$plan_name])) {
$track_limit = $plans_config[$plan_name]['tracks_per_month'];
}
// Create new record for this subscription period
// Also set year_month for backward compatibility
$year_month = date('Y-m', strtotime($period_start));
$stmt = $pdo->prepare("
INSERT INTO monthly_track_usage (
user_id, subscription_id, subscription_period_start,
year_month, tracks_created, track_limit, reset_at
)
VALUES (?, ?, ?, ?, 0, ?, NOW())
");
$stmt->execute([
$user_id,
$subscription_id,
$period_start,
$year_month,
$track_limit
]);
// Get the created record
$stmt = $pdo->prepare("
SELECT * FROM monthly_track_usage
WHERE user_id = ? AND subscription_period_start = ?
");
$stmt->execute([$user_id, $period_start]);
$usage = $stmt->fetch(PDO::FETCH_ASSOC);
}
return $usage;
}
/**
* Check if user can create a track (monthly limit check)
* Returns array with 'allowed' => true/false and 'message' => string
*/
function canCreateTrack($user_id) {
$pdo = getDBConnection();
// Get user info
$stmt = $pdo->prepare("SELECT plan FROM users WHERE id = ?");
$stmt->execute([$user_id]);
$user = $stmt->fetch(PDO::FETCH_ASSOC);
if (!$user) {
return ['allowed' => false, 'message' => 'User not found'];
}
// Check if user has active subscription (all subscription tiers)
$subscription = hasActiveSubscription($user_id);
if ($subscription) {
// Check if subscription status allows usage (exclude past_due, unpaid, canceled)
if (!in_array($subscription['status'], ['active', 'trialing'])) {
// Subscription exists but not in usable state
return [
'allowed' => false,
'message' => "Your subscription is {$subscription['status']}. Please update your payment method or contact support.",
'status' => $subscription['status']
];
}
// User has subscription - check monthly limit for all subscription tiers
$subscription_plans = ['essential', 'starter', 'pro', 'premium', 'enterprise'];
if (in_array(strtolower($subscription['plan_name']), $subscription_plans)) {
$usage = getMonthlyTrackUsage($user_id, $subscription['plan_name']);
if (!$usage) {
return [
'allowed' => false,
'message' => 'Unable to retrieve subscription usage. Please contact support.',
];
}
if ($usage['tracks_created'] >= $usage['track_limit']) {
// Subscription limit reached - check if user has credits to fall back to
$stmt = $pdo->prepare("SELECT credits FROM users WHERE id = ?");
$stmt->execute([$user_id]);
$user_credits = $stmt->fetch(PDO::FETCH_ASSOC);
if ($user_credits && $user_credits['credits'] >= 1) {
// User has credits available - allow using credits
return [
'allowed' => true,
'system' => 'credits',
'tracks_used' => $usage['tracks_created'],
'track_limit' => $usage['track_limit'],
'subscription_limit_reached' => true,
'message' => "You've reached your monthly subscription limit. Using your available credits instead."
];
}
// No credits available - block creation
$subscription = hasActiveSubscription($user_id);
$next_reset = 'the start of your next billing period';
if ($subscription && isset($subscription['current_period_end'])) {
$period_end = $subscription['current_period_end'];
if (is_numeric($period_end)) {
$period_end = date('Y-m-d H:i:s', $period_end);
}
$next_reset = date('F j, Y', strtotime($period_end));
}
return [
'allowed' => false,
'message' => "You've reached your monthly limit of {$usage['track_limit']} tracks. Your limit will reset on {$next_reset} (your next billing date). You can purchase extra credits if you need more tracks now.",
'tracks_used' => $usage['tracks_created'],
'track_limit' => $usage['track_limit']
];
}
return [
'allowed' => true,
'tracks_used' => $usage['tracks_created'],
'track_limit' => $usage['track_limit'],
'tracks_remaining' => $usage['track_limit'] - $usage['tracks_created']
];
}
}
// For non-subscription plans (free, or credit-based), use credit system
return ['allowed' => true, 'system' => 'credits'];
}
/**
* Increment monthly track usage for current subscription period
*/
function incrementMonthlyTrackUsage($user_id) {
$pdo = getDBConnection();
// Get active subscription to find current period
$subscription = hasActiveSubscription($user_id);
if (!$subscription) {
return false;
}
$period_start = $subscription['current_period_start'] ?? null;
if (!$period_start) {
return false;
}
// Convert period_start to datetime string if needed
if (is_numeric($period_start)) {
$period_start = date('Y-m-d H:i:s', $period_start);
}
$stmt = $pdo->prepare("
UPDATE monthly_track_usage
SET tracks_created = tracks_created + 1,
updated_at = NOW()
WHERE user_id = ? AND subscription_period_start = ?
");
$stmt->execute([$user_id, $period_start]);
return $stmt->rowCount() > 0;
}
/**
* Get subscription info for user
*/
function getSubscriptionInfo($user_id) {
try {
$pdo = getDBConnection();
$stmt = $pdo->prepare("
SELECT
us.*,
u.name as user_name,
u.email as user_email
FROM user_subscriptions us
JOIN users u ON us.user_id = u.id
WHERE us.user_id = ?
ORDER BY us.created_at DESC
LIMIT 1
");
$stmt->execute([$user_id]);
$result = $stmt->fetch(PDO::FETCH_ASSOC);
return $result ? $result : null;
} catch (Exception $e) {
error_log("Error in getSubscriptionInfo: " . $e->getMessage());
return null;
}
}
?>