<?php

/**
 * 所有在Bootstrap类中, 以_init开头的方法, 都会被Yaf调用,
 * 这些方法, 都接受一个参数:Yaf_Dispatcher $dispatcher
 * 调用的次序, 和申明的次序相同
 */
class Bootstrap extends Yaf_Bootstrap_Abstract{
 /**
  * 自定义视图引擎
  */
        public function _initSmarty(Yaf_Dispatcher $dispatcher) {
                $smarty = new Smarty_Adapter(null, Yaf_Registry::get("config")->get("smarty"));
                Yaf_Dispatcher::getInstance()->setView($smarty);
  }
}


/**
 * 视图引擎定义
 * Smarty/Adapter.php
 */
class Smarty_Adapter implements Yaf_View_Interface
{
    /**
     * Smarty object
     * @var Smarty
     */
    public $_smarty;
 
    /**
     * Constructor
     *
     * @param string $tmplPath
     * @param array $extraParams
     * @return void
     */
    public function __construct($tmplPath = null, $extraParams = array()) {

        require "Smarty.class.php";
        $this->_smarty = new Smarty;
 
        if (null !== $tmplPath) {
            $this->setScriptPath($tmplPath);
        }
 
        foreach ($extraParams as $key => $value) {
            $this->_smarty->$key = $value;
        }
    }
 
    /**
     * Assign variables to the template
     *
     * Allows setting a specific key to the specified value, OR passing
     * an array of key => value pairs to set en masse.
     *
     * @see __set()
     * @param string|array $spec The assignment strategy to use (key or
     * array of key => value pairs)
     * @param mixed $value (Optional) If assigning a named variable,
     * use this as the value.
     * @return void
     */
    public function assign($spec, $value = null) {
        if (is_array($spec)) {
            $this->_smarty->assign($spec);
            return;
        }
 
        $this->_smarty->assign($spec, $value);
    }
 
    /**
     * Processes a template and returns the output.
     *
     * @param string $name The template to process.
     * @return string The output.
     */
    public function render($name) {
        return $this->_smarty->fetch($name);
    }
}
?>

     
    

<?php
require "/path/to/smarty/Smarty.class.php";
class Smarty_Adapter implements Yaf_View_Interface
{
    /**
     * Smarty object
     * @var Smarty
     */
    public $_smarty;

    /**
     * Constructor
     *
     * @param string $tmplPath
     * @param array $extraParams
     * @return void
     */
    public function __construct($tmplPath = null, $extraParams = array()) {
        $this->_smarty = new Smarty;
        if (null !== $tmplPath) {
            $this->setScriptPath($tmplPath);
        }
        foreach ($extraParams as $key => $value) {
            $this->_smarty->$key = $value;
        }
    }

    /**
     * Set the path to the templates
     *
     * @param string $path The directory to set as the path.
     * @return void
     */
    public function setScriptPath($path)
    {
        if (is_readable($path)) {
            $this->_smarty->template_dir = $path;
            return;
        }
        throw new Exception('Invalid path provided');
    }

    /**
     * Assign a variable to the template
     *
     * @param string $key The variable name.
     * @param mixed $val The variable value.
     * @return void
     */
    public function __set($key, $val)
    {
        $this->_smarty->assign($key, $val);
    }

    /**
     * Allows testing with empty() and isset() to work
     *
     * @param string $key
     * @return boolean
     */
    public function __isset($key)
    {
        return (null !== $this->_smarty->get_template_vars($key));
    }

    /**
     * Allows unset() on object properties to work
     *
     * @param string $key
     * @return void
     */
    public function __unset($key)
    {
        $this->_smarty->clear_assign($key);
    }

    /**
     * Assign variables to the template
     *
     * @see __set()
     * @param string|array $spec The assignment strategy to use
     * @param mixed $value (Optional) value to assign
     * @return void
     */
    public function assign($spec, $value = null) {
        if (is_array($spec)) {
            $this->_smarty->assign($spec);
            return;
        }
        $this->_smarty->assign($spec, $value);
    }

    /**
     * Clear all assigned variables
     *
     * @return void
     */
    public function clearVars() {
        $this->_smarty->clear_all_assign();
    }

    /**
     * Processes a template and returns the output.
     *
     * @param string $name The template to process.
     * @return string The output.
     */
    public function render($name, $value = NULL) {
        return $this->_smarty->fetch($name);
    }

    public function display($name, $value = NULL) {
        echo $this->_smarty->fetch($name);
    }
}
?>

<?php
class Bootstrap extends Yaf_Bootstrap_Abstract {
    /**
     * 配置文件中有一组smarty相关的配置:
     *
     * smarty.left_delimiter   = "{{"
     * smarty.right_delimiter  = "}}"
     * smarty.template_dir     = APPLICATION_PATH "/views/scripts/"
     * smarty.compile_dir      = APPLICATION_PATH "/views/templates_c/"
     * smarty.cache_dir        = APPLICATION_PATH "/views/templates_d/"
     */
    public function _initConfig() {
        $config = Yaf_Application::app()->getConfig();
        Yaf_Registry::set("config", $config);
    }

    public function _initLocalName() {
        /** 把Smarty_Adapter类放在本地库目录下 */
        Yaf_Loader::getInstance()->registerLocalNamespace('Smarty');
    }

    public function _initSmarty(Yaf_Dispatcher $dispatcher) {
        $smarty = new Smarty_Adapter(null, Yaf_Registry::get("config")->get("smarty"));
        $dispatcher->setView($smarty);
        /* 从此Smarty成为Yaf的默认视图引擎 */
    }
}
?>