controller.php

完美的在线教育系统

                    }
                }
                return false;
            }
        }
        return true;
    }


   /**
    * Returns the name of the page before the given.
    * 
    * @access public
    * @param  string 
    * @return string
    */
    function getPrevName($pageName)
    {
        $prev = null;
        foreach (array_keys($this->_pages) as $key) {
            if ($key == $pageName) {
                return $prev;
            }
            $prev = $key;
        }
    }


   /**
    * Returns the name of the page after the given.
    * 
    * @access public
    * @param  string 
    * @return string
    */
    function getNextName($pageName)
    {
        $prev = null;
        foreach (array_keys($this->_pages) as $key) {
            if ($prev == $pageName) {
                return $key;
            }
            $prev = $key;
        }
        return null;
    }


   /**
    * Finds the (first) invalid page
    * 
    * @access public
    * @return string  Name of an invalid page
    */
    function findInvalid()
    {
        $data =& $this->container();
        foreach (array_keys($this->_pages) as $key) {
            if (!$data['valid'][$key]) {
                return $key;
            }
        }
        return null;
    }


   /**
    * Extracts the names of the current page and the current action from
    * HTTP request data. 
    *
    * @access public
    * @return array     first element is page name, second is action name
    */
    function getActionName()
    {
        if (is_array($this->_actionName)) {
            return $this->_actionName;
        }
        $names = array_map('preg_quote', array_keys($this->_pages));
        $regex = '/^_qf_(' . implode('|', $names) . ')_(.+?)(_x)?$/';
        foreach (array_keys($_REQUEST) as $key) {
            if (preg_match($regex, $key, $matches)) {
                return array($matches[1], $matches[2]);
            }
        }
        if (isset($_REQUEST['_qf_default'])) {
            $matches = explode(':', $_REQUEST['_qf_default'], 2);
            if (isset($this->_pages[$matches[0]])) {
                return $matches;
            }
        }
        reset($this->_pages);
        return array(key($this->_pages), 'display');
    }


   /**
    * Initializes default form values.
    *
    * @access public
    * @param  array  default values
    * @param  mixed  filter(s) to apply to default values
    * @throws PEAR_Error
    */
    function setDefaults($defaultValues = null, $filter = null)
    {
        if (is_array($defaultValues)) {
            $data =& $this->container();
            return $this->_setDefaultsOrConstants($data['defaults'], $defaultValues, $filter);
        }
    }


   /**
    * Initializes constant form values.
    * These values won't get overridden by POST or GET vars
    *
    * @access public
    * @param  array  constant values
    * @param  mixed  filter(s) to apply to constant values
    * @throws PEAR_Error
    */
    function setConstants($constantValues = null, $filter = null)
    {
        if (is_array($constantValues)) {
            $data =& $this->container();
            return $this->_setDefaultsOrConstants($data['constants'], $constantValues, $filter);
        }
    }


   /**
    * Adds new values to defaults or constants array
    *
    * @access   private
    * @param    array   array to add values to (either defaults or constants)
    * @param    array   values to add
    * @param    mixed   filters to apply to new values
    * @throws   PEAR_Error
    */
    function _setDefaultsOrConstants(&$values, $newValues, $filter = null)
    {
        if (isset($filter)) {
            if (is_array($filter) && (2 != count($filter) || !is_callable($filter))) {
                foreach ($filter as $val) {
                    if (!is_callable($val)) {
                        return PEAR::raiseError(null, QUICKFORM_INVALID_FILTER, null, E_USER_WARNING, "Callback function does not exist in QuickForm_Controller::_setDefaultsOrConstants()", 'HTML_QuickForm_Error', true);
                    } else {
                        $newValues = $this->_arrayMapRecursive($val, $newValues);
                    }
                }
            } elseif (!is_callable($filter)) {
                return PEAR::raiseError(null, QUICKFORM_INVALID_FILTER, null, E_USER_WARNING, "Callback function does not exist in QuickForm_Controller::_setDefaultsOrConstants()", 'HTML_QuickForm_Error', true);
            } else {
                $newValues = $this->_arrayMapRecursive($val, $newValues);
            }
        }
        $values = HTML_QuickForm::arrayMerge($values, $newValues);
    }


   /**
    * Recursively applies the callback function to the value
    * 
    * @param    mixed   Callback function
    * @param    mixed   Value to process
    * @access   private
    * @return   mixed   Processed values
    */
    function _arrayMapRecursive($callback, $value)
    {
        if (!is_array($value)) {
            return call_user_func($callback, $value);
        } else {
            $map = array();
            foreach ($value as $k => $v) {
                $map[$k] = $this->_arrayMapRecursive($callback, $v);
            }
            return $map;
        }
    }


   /**
    * Sets the default values for the given page
    *
    * @access public
    * @param  string  Name of a page
    */
    function applyDefaults($pageName)
    {
        $data =& $this->container();
        if (!empty($data['defaults'])) {
            $this->_pages[$pageName]->setDefaults($data['defaults']);
        }
        if (!empty($data['constants'])) {
            $this->_pages[$pageName]->setConstants($data['constants']);
        }
    }


   /**
    * Returns the form's values
    * 
    * @access public
    * @param  string    name of the page, if not set then returns values for all pages
    * @return array
    */
    function exportValues($pageName = null)
    {
        $data   =& $this->container();
        $values =  array();
        if (isset($pageName)) {
            $pages = array($pageName);
        } else {
            $pages = array_keys($data['values']);
        }
        foreach ($pages as $page) {
            // skip elements representing actions
            foreach ($data['values'][$page] as $key => $value) {
                if (0 !== strpos($key, '_qf_')) {
                    if (isset($values[$key]) && is_array($value)) {
                        $values[$key] = HTML_QuickForm::arrayMerge($values[$key], $value);
                    } else {
                        $values[$key] = $value;
                    }
                }
            }
        }
        return $values;
    }


   /**
    * Returns the element's value
    * 
    * @access public
    * @param  string    name of the page
    * @param  string    name of the element in the page
    * @return mixed     value for the element
    */
    function exportValue($pageName, $elementName)
    {
        $data =& $this->container();
        return isset($data['values'][$pageName][$elementName])? $data['values'][$pageName][$elementName]: null;
    }
}
?>