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| 1 | <?php |
| 2 | /** |
| 3 | * Freemius Webhook Forwarder (CF17.1 Option B - client side). |
| 4 | * |
| 5 | * Listens to Freemius SDK action events for license lifecycle changes |
| 6 | * (cancellation, refund, expiration, etc.) and forwards them to the |
| 7 | * server's /v1/webhooks/status endpoint. |
| 8 | * |
| 9 | * This is the FAST path for license status sync: |
| 10 | * - Server cron (every 48h) = ground truth, catches silent changes |
| 11 | * - Client webhook (real-time) = fast path, instant on cancellation |
| 12 | * |
| 13 | * Both write to the same licenses.status column; whichever runs last wins. |
| 14 | * |
| 15 | * Security: |
| 16 | * - Webhook calls authenticated with X-SwapAds-Webhook-Secret header |
| 17 | * - Same secret the server uses; rotated via swapads_client_webhook_secret option |
| 18 | * |
| 19 | * @since 1.3.0 |
| 20 | */ |
| 21 | |
| 22 | declare(strict_types=1); |
| 23 | |
| 24 | namespace SwapAds\Client\License; |
| 25 | |
| 26 | use SwapAds\Client\Api\RestClient; |
| 27 | |
| 28 | final class FreemiusWebhookForwarder |
| 29 | { |
| 30 | public const OPTION_WEBHOOK_SECRET = 'swapads_client_webhook_secret'; |
| 31 | public const OPTION_LAST_FORWARD_AT = 'swapads_client_last_webhook_forward_at'; |
| 32 | public const OPTION_LAST_FORWARD_RESULT = 'swapads_client_last_webhook_forward_result'; |
| 33 | |
| 34 | /** |
| 35 | * Register Freemius action listeners. |
| 36 | * |
| 37 | * @return void |
| 38 | * |
| 39 | * @since 1.3.0 |
| 40 | */ |
| 41 | public static function register(): void |
| 42 | { |
| 43 | // Map Freemius SDK events to our server webhook event types. |
| 44 | // SDK fires these actions when license state changes upstream. |
| 45 | add_action('swa_fs_license_loaded', [self::class, 'onLicenseLoaded']); |
| 46 | add_action('swa_fs_license_change', [self::class, 'onLicenseChange']); |
| 47 | // Plugin-level events |
| 48 | add_action('swa_fs_after_uninstall', [self::class, 'onAfterUninstall']); |
| 49 | // Catch-all for any state change |
| 50 | add_action('swa_fs_account_change', [self::class, 'onAccountChange']); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Handle license_loaded event (SDK fires this once on first load after opt-in). |
| 55 | * |
| 56 | * @param object $license SDK license object. |
| 57 | * @return void |
| 58 | */ |
| 59 | public static function onLicenseLoaded($license): void |
| 60 | { |
| 61 | if (!is_object($license)) { |
| 62 | return; |
| 63 | } |
| 64 | self::forward('license.loaded', [ |
| 65 | 'license_id' => (string) ($license->id ?? ''), |
| 66 | 'plan_id' => (string) ($license->plan_id ?? ''), |
| 67 | 'secret_key' => (string) ($license->secret_key ?? ''), |
| 68 | ]); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Handle license_change event (fires when license object updates). |
| 73 | * |
| 74 | * @param object $license SDK license object. |
| 75 | * @return void |
| 76 | */ |
| 77 | public static function onLicenseChange($license): void |
| 78 | { |
| 79 | if (!is_object($license)) { |
| 80 | return; |
| 81 | } |
| 82 | self::forward('license.updated', [ |
| 83 | 'license_id' => (string) ($license->id ?? ''), |
| 84 | 'plan_id' => (string) ($license->plan_id ?? ''), |
| 85 | 'secret_key' => (string) ($license->secret_key ?? ''), |
| 86 | ]); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Handle account_change event (fires when FS account details change). |
| 91 | * |
| 92 | * @param object $account SDK account object. |
| 93 | * @return void |
| 94 | */ |
| 95 | public static function onAccountChange($account): void |
| 96 | { |
| 97 | if (!is_object($account)) { |
| 98 | return; |
| 99 | } |
| 100 | // Map account changes to license status updates. |
| 101 | $event = 'license.updated'; |
| 102 | if (isset($account->is_active) && !$account->is_active) { |
| 103 | $event = 'license.cancelled'; |
| 104 | } |
| 105 | self::forward($event, [ |
| 106 | 'account_id' => (string) ($account->id ?? ''), |
| 107 | 'is_active' => (bool) ($account->is_active ?? false), |
| 108 | ]); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Handle after_uninstall event (fires when user uninstalls plugin). |
| 113 | * |
| 114 | * @return void |
| 115 | */ |
| 116 | public static function onAfterUninstall(): void |
| 117 | { |
| 118 | self::forward('license.cancelled', [ |
| 119 | 'reason' => 'plugin_uninstalled', |
| 120 | ]); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Forward a Freemius event to the server's /v1/webhooks/status endpoint. |
| 125 | * |
| 126 | * @param string $eventType Event type (license.loaded, license.cancelled, etc.) |
| 127 | * @param array<string, mixed> $payload Event payload. |
| 128 | * @return bool True if forward succeeded. |
| 129 | * |
| 130 | * @since 1.3.0 |
| 131 | */ |
| 132 | public static function forward(string $eventType, array $payload): bool |
| 133 | { |
| 134 | if (!LicenseManager::isLicensed()) { |
| 135 | return false; |
| 136 | } |
| 137 | |
| 138 | $webhookSecret = (string) get_option(self::OPTION_WEBHOOK_SECRET, ''); |
| 139 | if ($webhookSecret === '') { |
| 140 | // Operator hasn't configured webhook secret yet - silently skip. |
| 141 | // The 48h cron will still catch license changes. |
| 142 | return false; |
| 143 | } |
| 144 | |
| 145 | $serverUrl = (string) get_option('swapads_client_server_url', ''); |
| 146 | if ($serverUrl === '') { |
| 147 | return false; |
| 148 | } |
| 149 | |
| 150 | // Build request with custom X-SwapAds-Webhook-Secret header. |
| 151 | $url = rtrim($serverUrl, '/') . '/wp-json/swapads-server/v1/webhooks/status'; |
| 152 | $body = [ |
| 153 | 'type' => $eventType, |
| 154 | ] + $payload; |
| 155 | |
| 156 | $response = wp_remote_post($url, [ |
| 157 | 'headers' => [ |
| 158 | 'Content-Type' => 'application/json', |
| 159 | 'X-SwapAds-Webhook-Secret' => $webhookSecret, |
| 160 | ], |
| 161 | 'body' => (string) json_encode($body), |
| 162 | 'timeout' => 10, |
| 163 | ]); |
| 164 | |
| 165 | update_option(self::OPTION_LAST_FORWARD_AT, time()); |
| 166 | |
| 167 | if (!is_array($response)) { |
| 168 | update_option(self::OPTION_LAST_FORWARD_RESULT, [ |
| 169 | 'success' => false, |
| 170 | 'error' => 'wp_remote_post returned non-array response', |
| 171 | 'event' => $eventType, |
| 172 | ]); |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | $code = (int) wp_remote_retrieve_response_code($response); |
| 177 | $raw = (string) wp_remote_retrieve_body($response); |
| 178 | $data = json_decode($raw, true); |
| 179 | $success = $code >= 200 && $code < 300; |
| 180 | |
| 181 | update_option(self::OPTION_LAST_FORWARD_RESULT, [ |
| 182 | 'success' => $success, |
| 183 | 'http_code' => $code, |
| 184 | 'event' => $eventType, |
| 185 | 'response' => is_array($data) ? $data : [], |
| 186 | ]); |
| 187 | |
| 188 | return $success; |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Get the last forward result (for diagnostics in admin UI). |
| 193 | * |
| 194 | * @return array<string, mixed> |
| 195 | */ |
| 196 | public static function getLastResult(): array |
| 197 | { |
| 198 | $result = get_option(self::OPTION_LAST_FORWARD_RESULT, []); |
| 199 | return is_array($result) ? $result : []; |
| 200 | } |
| 201 | } |