From 37c58e186a55beaddf83b8910138f221b1ffbffd Mon Sep 17 00:00:00 2001
From: "J. King" <jking@jkingweb.ca>
Date: Sun, 4 Jul 2021 22:04:05 -0400
Subject: [PATCH] Handle hangup signal

---
 arsse.php       |  3 +--
 lib/Arsse.php   |  6 ++++++
 lib/CLI.php     |  3 +--
 lib/Service.php | 21 ++++++++++++++++++++-
 4 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/arsse.php b/arsse.php
index 8b6d1fd..7e13cc3 100644
--- a/arsse.php
+++ b/arsse.php
@@ -25,8 +25,7 @@ if (\PHP_SAPI === "cli") {
     exit($exitStatus);
 } else {
     // load configuration
-    $conf = file_exists(BASE."config.php") ? new Conf(BASE."config.php") : new Conf;
-    Arsse::load($conf);
+    Arsse::bootstrap();
     // handle Web requests
     $emitter = new \Laminas\HttpHandlerRunner\Emitter\SapiEmitter;
     $response = (new REST)->dispatch();
diff --git a/lib/Arsse.php b/lib/Arsse.php
index 18f568f..ec0305b 100644
--- a/lib/Arsse.php
+++ b/lib/Arsse.php
@@ -29,6 +29,12 @@ class Arsse {
     /** @var User */
     public static $user;
 
+    /** @codeCoverageIgnore */
+    public static function bootstrap(): void {
+        $conf = file_exists(BASE."config.php") ? new Conf(BASE."config.php") : new Conf;
+        static::load($conf);
+    }
+
     public static function load(Conf $conf): void {
         static::$obj = static::$obj ?? new Factory;
         static::$lang = static::$lang ?? new Lang;
diff --git a/lib/CLI.php b/lib/CLI.php
index 3bb271e..9e9993e 100644
--- a/lib/CLI.php
+++ b/lib/CLI.php
@@ -61,8 +61,7 @@ USAGE_TEXT;
 
     /** @codeCoverageIgnore */
     protected function loadConf(): bool {
-        $conf = file_exists(BASE."config.php") ? new Conf(BASE."config.php") : new Conf;
-        Arsse::load($conf);
+        Arsse::bootstrap();
         return true;
     }
 
diff --git a/lib/Service.php b/lib/Service.php
index af95edc..3ac3c4b 100644
--- a/lib/Service.php
+++ b/lib/Service.php
@@ -17,6 +17,7 @@ class Service {
     /** @var Service\Driver */
     protected $drv;
     protected $loop = false;
+    protected $reload = false;
 
     public function __construct() {
         $driver = Arsse::$conf->serviceDriver;
@@ -43,7 +44,10 @@ class Service {
             if ($this->loop) {
                 do {
                     sleep((int) max(0, $t->getTimestamp() - time()));
-                    pcntl_signal_dispatch();
+                    pcntl_signal_dispatch();   
+                    if ($this->hangup) {
+                        $this->reload();
+                    }
                 } while ($this->loop && $t->getTimestamp() > time());
             }
             // @codeCoverageIgnoreEnd
@@ -51,6 +55,13 @@ class Service {
         return $t;
     }
 
+    public function reload(): void {
+        $this->reload = false;
+        unset(Arsse::$user, Arsse::$db, Arsse::$conf, Arsse::$lang, Arsse::$obj, $this->drv);
+        Arsse::bootstrap();
+        $this->__construct();
+    }
+
     public function checkIn(): bool {
         return Arsse::$db->metaSet("service_last_checkin", time(), "datetime");
     }
@@ -100,6 +111,7 @@ class Service {
             foreach ([\SIGABRT, \SIGINT, \SIGTERM] as $sig) {
                 pcntl_signal($sig, [$this, "sigTerm"]);
             }
+            pcntl_signal(\SIGHUP, [$this, "sigHup"]);
         }
     }
 
@@ -109,4 +121,11 @@ class Service {
     protected function sigTerm(int $signo): void {
         $this->loop = false;
     }
+
+    /** Changes the condition for the service loop upon receiving a hangup signal
+     * 
+     * @codeCoverageIgnore */
+    protected function sigHup(int $signo): void {
+        $this->hangup = true;
+    }
 }