新增 crontab 组件

extend/catcher/library/crontab/Cron.php

@@ -8,3 +8,118 @@
 // +----------------------------------------------------------------------
 // | Author: JaguarJack [ njphper@gmail.com ]
 // +----------------------------------------------------------------------
+namespace catcher\library\crontab;
+
+use Cron\CronExpression;
+use think\facade\Console;
+
+/**
+ * Class Cron
+ * @package catcher\library\crontab
+ *
+ * // cron 表达式
+ *    *    *    *    *
+ * -    -    -    -    -
+* |    |    |    |    |
+* |    |    |    |    |
+* |    |    |    |    +----- day of week (0 - 6) (Sunday=0)
+* |    |    |    +---------- month (1 - 12)
+* |    |    +--------------- day of month (1 - 31)
+* |    +-------------------- hour (0 - 23)
+* +------------------------- min (0 - 59)
+ *
+ *
+ *
+ */
+class Cron
+{
+    use Frequencies;
+
+    /**
+     * crontab 表达式
+     *
+     * @var string
+     */
+    protected $expression = '* * * * *';
+
+    /**
+     * task 任务
+     *
+     * @var string
+     */
+    protected $task;
+
+    /**
+     * console 命令
+     *
+     * @var string
+     */
+    protected $console;
+
+    /**
+     * console 参数
+     *
+     * @var array
+     */
+    protected $arguments;
+
+    /**
+     * 秒级支持
+     *
+     * @var int
+     */
+    protected $second;
+
+    public function __construct($name, $arguments = [])
+    {
+        if (is_string($name)) {
+            $this->console = $name;
+        }
+
+        if (is_object($name)) {
+            $this->task = $name;
+        }
+
+        $this->arguments = $arguments;
+    }
+
+    /**
+     * 运行 cron 任务
+     *
+     * @time 2020年07月04日
+     * @return void
+     */
+    public function run()
+    {
+        if ($this->console) {
+            Console::call($this->console, $this->arguments);
+        }
+
+        if ($this->task && method_exists($this->task, 'run')) {
+            $this->task->run();
+        }
+    }
+
+    /**
+     * 是否可运行
+     *
+     * @time 2020年07月04日
+     * @return bool
+     */
+    protected function can()
+    {
+        if ($this->second) {
+            $now = date('s', time());
+
+            return in_array($now, [--$now, $now, ++$now]);
+        }
+
+        if ($this->expression) {
+            $cron = CronExpression::factory($this->expression);
+            return $cron->isDue('now');
+        }
+
+        return  false;
+    }
+
+}