看板初始化提交

app/Core/Plugin/Hook.php

@@ -0,0 +1,116 @@
+<?php
+
+namespace Kanboard\Core\Plugin;
+
+/**
+ * Plugin Hooks Handler
+ *
+ * @package Kanboard\Core\Plugin
+ * @author  Frederic Guillot
+ */
+class Hook
+{
+    /**
+     * List of hooks
+     *
+     * @access private
+     * @var array
+     */
+    private $hooks = array();
+
+    /**
+     * Bind something on a hook
+     *
+     * @access public
+     * @param  string   $hook
+     * @param  mixed    $value
+     */
+    public function on($hook, $value)
+    {
+        if (! isset($this->hooks[$hook])) {
+            $this->hooks[$hook] = array();
+        }
+
+        $this->hooks[$hook][] = $value;
+    }
+
+    /**
+     * Get all bindings for a hook
+     *
+     * @access public
+     * @param  string  $hook
+     * @return array
+     */
+    public function getListeners($hook)
+    {
+        return isset($this->hooks[$hook]) ? $this->hooks[$hook] : array();
+    }
+
+    /**
+     * Return true if the hook is used
+     *
+     * @access public
+     * @param  string  $hook
+     * @return boolean
+     */
+    public function exists($hook)
+    {
+        return isset($this->hooks[$hook]);
+    }
+
+    /**
+     * Merge listener results with input array
+     *
+     * @access public
+     * @param  string  $hook
+     * @param  array   $values
+     * @param  array   $params
+     * @return array
+     */
+    public function merge($hook, array &$values, array $params = array())
+    {
+        foreach ($this->getListeners($hook) as $listener) {
+            $result = call_user_func_array($listener, $params);
+
+            if (is_array($result) && ! empty($result)) {
+                $values = array_merge($values, $result);
+            }
+        }
+
+        return $values;
+    }
+
+    /**
+     * Execute only first listener
+     *
+     * @access public
+     * @param  string  $hook
+     * @param  array   $params
+     * @return mixed
+     */
+    public function first($hook, array $params = array())
+    {
+        foreach ($this->getListeners($hook) as $listener) {
+            return call_user_func_array($listener, $params);
+        }
+
+        return null;
+    }
+
+    /**
+     * Hook with reference
+     *
+     * @access public
+     * @param  string $hook
+     * @param  mixed  $param
+     * @return mixed
+     */
+    public function reference($hook, &$param)
+    {
+        foreach ($this->getListeners($hook) as $listener) {
+            $listener($param);
+        }
+
+        return $param;
+    }
+}