Hooks.php

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<?php

namespace Tools;

class Hooks
{
    private $context;

    private $hooks;

    private $currentHook;

    public function __construct(&$context)
    {
        $this->context = $context;
        $this->currentHook = array();
        $this->hooks = array();
    }

    public function register($module, $hookName)
    {
        if (!\Tools\ModuleManager::isInstalling())
            throw new \Exception("You can only register hooks while installing");
        if (!isset($this->hooks[$hookName]))
            $this->hooks[$hookName] = array();
        $this->hooks[$hookName][] = $module->entity->id;
        $moduleHook = new \Entity\ModuleHook();
        $moduleHook->module_id = $module->entity->id;
        $moduleHook->hookName = $hookName;
        $moduleHook->hookPosition = 10;
        $moduleHook->save();
    }

    public function trigger($hookName, $params =null)
    {
        if (empty($this->hooks[$hookName]))
            return 0;
        $hookEvent = new HookEvent($hookName, $this->context, $params);
        array_push($this->currentHook, $hookEvent);
        $result = 0;
        foreach ($this->hooks[$hookName] as $module_id)
        {
            $module = $this->context->moduleManager->getModuleFromId($module_id);
            if (!$module)
                continue;
            $module->doAction($hookEvent);
            $result++;
        }
        array_pop($this->currentHook);
        return $result;
    }

    public function isInHook($hookName)
    {
        foreach ($this->currentHook as $i)
            if ($i->hookName == $hookName)
                return true;
        return false;
    }

    public function loadHooks($hookEntities)
    {
        $this->hooks = array();
        foreach ($hookEntities as $i)
            $this->hooks[$i->hookName][] = (int) $i->module_id;
    }

    public function __get($key)
    {
        switch ($key)
        {
            case "currentHook": return end($this->currentHook);
        }
        throw new \Exception("Cannot access attribute {$key}");
    }
}