Fix FCM token registration and add queue reminder alerts

- Fix silent insert failure in FCM token registration (missing NOT NULL
  refresh_token column) so WebView app tokens are actually stored
- Add 1-minute queue reminder cron that re-sends FCM alerts for calls
  still waiting, with transient-based throttle to prevent duplicates
- Send FCM cancel on queue dequeue (answered/hangup/timeout), not just
  on final call status webhook
- Clean up new cron hook on plugin deactivation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

includes/class-twp-call-queue.php

@@ -577,6 +577,69 @@ class TWP_Call_Queue {
         return $status;
     }
     
+    /**
+     * Cron callback: re-send FCM queue alerts every minute for calls still waiting.
+     * Only alerts for calls that have been waiting > 60 seconds (initial alert
+     * already sent on entry). Skips re-alerting for the same call within 55 seconds
+     * using a short transient to avoid overlap with the 60-second cron.
+     */
+    public static function send_queue_reminders() {
+        global $wpdb;
+        $calls_table = $wpdb->prefix . 'twp_queued_calls';
+        $queue_table = $wpdb->prefix . 'twp_call_queues';
+
+        // Find calls waiting longer than 60 seconds
+        $waiting_calls = $wpdb->get_results(
+            "SELECT c.*, q.queue_name, q.user_id AS queue_owner_id, q.agent_group_id
+             FROM $calls_table c
+             JOIN $queue_table q ON q.id = c.queue_id
+             WHERE c.status = 'waiting'
+             AND c.joined_at <= DATE_SUB(NOW(), INTERVAL 60 SECOND)"
+        );
+
+        if (empty($waiting_calls)) {
+            return;
+        }
+
+        require_once dirname(__FILE__) . '/class-twp-fcm.php';
+        $fcm = new TWP_FCM();
+
+        foreach ($waiting_calls as $call) {
+            // Throttle: skip if we reminded for this call within the last 55 seconds
+            $transient_key = 'twp_queue_remind_' . $call->call_sid;
+            if (get_transient($transient_key)) {
+                continue;
+            }
+            set_transient($transient_key, 1, 55);
+
+            $waiting_minutes = max(1, round((time() - strtotime($call->joined_at)) / 60));
+            $title = 'Call Still Waiting';
+            $body  = "Call from {$call->from_number} waiting {$waiting_minutes}m in {$call->queue_name}";
+
+            $notified_users = array();
+
+            // Notify queue owner
+            if (!empty($call->queue_owner_id)) {
+                $fcm->notify_queue_alert($call->queue_owner_id, $call->from_number, $call->queue_name, $call->call_sid);
+                $notified_users[] = $call->queue_owner_id;
+            }
+
+            // Notify agent group members
+            if (!empty($call->agent_group_id)) {
+                require_once dirname(__FILE__) . '/class-twp-agent-groups.php';
+                $members = TWP_Agent_Groups::get_group_members($call->agent_group_id);
+                foreach ($members as $member) {
+                    if (!in_array($member->user_id, $notified_users)) {
+                        $fcm->notify_queue_alert($member->user_id, $call->from_number, $call->queue_name, $call->call_sid);
+                        $notified_users[] = $member->user_id;
+                    }
+                }
+            }
+
+            error_log("TWP Queue Reminder: Re-alerted " . count($notified_users) . " user(s) for call {$call->call_sid} waiting {$waiting_minutes}m");
+        }
+    }
+
     /**
      * Notify agents via SMS when a call enters the queue
      */

includes/class-twp-core.php

@@ -266,6 +266,9 @@ class TWP_Core {
         $queue = new TWP_Call_Queue();
         $this->loader->add_action('twp_process_queue', $queue, 'process_waiting_calls');
 
+        // Queue reminder alerts (re-send FCM every minute for waiting calls)
+        add_action('twp_queue_reminders', array('TWP_Call_Queue', 'send_queue_reminders'));
+        
         // Callback processing
         $this->loader->add_action('twp_process_callbacks', 'TWP_Callback_Manager', 'process_callbacks');
         
@@ -281,6 +284,10 @@ class TWP_Core {
             wp_schedule_event(time(), 'twp_every_30_seconds', 'twp_process_queue');
         }
         
+        if (!wp_next_scheduled('twp_queue_reminders')) {
+            wp_schedule_event(time(), 'twp_every_minute', 'twp_queue_reminders');
+        }
+
         if (!wp_next_scheduled('twp_process_callbacks')) {
             wp_schedule_event(time(), 'twp_every_minute', 'twp_process_callbacks');
         }

includes/class-twp-deactivator.php

@@ -11,6 +11,7 @@ class TWP_Deactivator {
         // Clear scheduled events
         wp_clear_scheduled_hook('twp_check_schedules');
         wp_clear_scheduled_hook('twp_process_queue');
+        wp_clear_scheduled_hook('twp_queue_reminders');
         wp_clear_scheduled_hook('twp_auto_revert_agents');
         
         // Flush rewrite rules

includes/class-twp-mobile-phone-page.php

@@ -55,17 +55,32 @@ class TWP_Mobile_Phone_Page {
             $user_id, $fcm_token
         ));
 
-        if (!$existing) {
+        if ($existing) {
+            // Refresh the expiry on existing session
+            $wpdb->update($table,
+                array('expires_at' => date('Y-m-d H:i:s', time() + 7 * DAY_IN_SECONDS)),
+                array('id' => $existing->id),
+                array('%s'),
+                array('%d')
+            );
+        } else {
             $wpdb->insert($table, array(
                 'user_id'       => $user_id,
+                'refresh_token' => 'webview-' . wp_generate_password(32, false),
                 'fcm_token'     => $fcm_token,
                 'device_info'   => 'WebView Mobile App',
                 'is_active'     => 1,
                 'created_at'    => current_time('mysql'),
                 'expires_at'    => date('Y-m-d H:i:s', time() + 7 * DAY_IN_SECONDS),
             ));
+
+            if ($wpdb->last_error) {
+                error_log('TWP FCM: Failed to insert token: ' . $wpdb->last_error);
+                wp_send_json_error('Failed to store token');
+            }
         }
 
+        error_log("TWP FCM: Token registered for user $user_id");
         wp_send_json_success('FCM token registered');
     }
 

includes/class-twp-webhooks.php

@@ -1276,6 +1276,20 @@ class TWP_Webhooks {
         
         if ($updated) {
             error_log('TWP Queue Action: Updated call status to ' . $status);
+
+            // Cancel FCM queue alerts when call leaves the queue for any reason
+            if (in_array($status, array('answered', 'hangup', 'transferred', 'timeout', 'completed'))) {
+                $queued_call = $wpdb->get_row($wpdb->prepare(
+                    "SELECT queue_id FROM $table_name WHERE call_sid = %s",
+                    $call_sid
+                ));
+                if ($queued_call) {
+                    require_once plugin_dir_path(__FILE__) . 'class-twp-fcm.php';
+                    $fcm = new TWP_FCM();
+                    $fcm->cancel_queue_alert_for_queue($queued_call->queue_id, $call_sid);
+                    error_log('TWP Queue Action: Sent FCM cancel for call ' . $call_sid);
+                }
+            }
         } else {
             error_log('TWP Queue Action: No call found to update with SID ' . $call_sid);
         }