mirror of
https://github.com/phpbb/phpbb.git
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518 lines
14 KiB
PHP
518 lines
14 KiB
PHP
<?php
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/**
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*
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* @package phpBB3
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* @copyright (c) 2005 phpBB Group, sections (c) 2001 ispi of Lincoln Inc
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* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
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*
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*/
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/**
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* @ignore
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*/
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if (!defined('IN_PHPBB'))
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{
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exit;
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}
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/**
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* @todo
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* IMG_ for image substitution?
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* {IMG_[key]:[alt]:[type]}
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* {IMG_ICON_CONTACT:CONTACT:full} -> $user->img('icon_contact', 'CONTACT', 'full');
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*
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* More in-depth...
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* yadayada
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*/
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/**
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* Base Template class.
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* @package phpBB3
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*/
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class phpbb_style_template
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{
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/**
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* @var phpbb_template_context Template context.
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* Stores template data used during template rendering.
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*/
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public $context;
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/**
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* @var string Path of the cache directory for the template
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*/
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public $cachepath = '';
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/**
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* @var string phpBB root path
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*/
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private $phpbb_root_path;
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/**
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* @var phpEx PHP file extension
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*/
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private $phpEx;
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/**
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* @var phpbb_config phpBB config instance
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*/
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private $config;
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/**
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* @var user current user
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*/
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private $user;
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/**
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* Style resource locator
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* @var phpbb_style_resource_locator
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*/
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private $locator;
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/**
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* Template path provider
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* @var phpbb_style_path_provider
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*/
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private $provider;
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/**
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* Location of templates directory within style directories
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* @var string
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*/
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public $template_path = 'template/';
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/**
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* Constructor.
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*
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* @param string $phpbb_root_path phpBB root path
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* @param user $user current user
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* @param phpbb_style_resource_locator $locator style resource locator
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* @param phpbb_style_path_provider $provider style path provider
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*/
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public function __construct($phpbb_root_path, $phpEx, $config, $user, phpbb_style_resource_locator $locator, phpbb_style_path_provider_interface $provider)
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{
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$this->phpbb_root_path = $phpbb_root_path;
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$this->phpEx = $phpEx;
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$this->config = $config;
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$this->user = $user;
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$this->locator = $locator;
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$this->template_path = $this->locator->template_path;
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$this->provider = $provider;
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}
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/**
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* Sets the template filenames for handles.
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*
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* @param array $filname_array Should be a hash of handle => filename pairs.
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*/
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public function set_filenames(array $filename_array)
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{
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$this->locator->set_filenames($filename_array);
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return true;
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}
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/**
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* Clears all variables and blocks assigned to this template.
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*/
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public function destroy()
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{
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$this->context->clear();
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}
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/**
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* Reset/empty complete block
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*
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* @param string $blockname Name of block to destroy
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*/
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public function destroy_block_vars($blockname)
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{
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$this->context->destroy_block_vars($blockname);
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}
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/**
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* Display a template for provided handle.
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*
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* The template will be loaded and compiled, if necessary, first.
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*
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* This function calls hooks.
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*
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* @param string $handle Handle to display
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* @return bool True on success, false on failure
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*/
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public function display($handle)
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{
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$result = $this->call_hook($handle);
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if ($result !== false)
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{
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return $result[0];
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}
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return $this->load_and_render($handle);
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}
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/**
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* Loads a template for $handle, compiling it if necessary, and
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* renders the template.
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*
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* @param string $handle Template handle to render
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* @return bool True on success, false on failure
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*/
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private function load_and_render($handle)
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{
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$renderer = $this->_tpl_load($handle);
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if ($renderer)
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{
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$renderer->render($this->context, $this->get_lang());
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return true;
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}
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else
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{
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return false;
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}
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}
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/**
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* Calls hook if any is defined.
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*
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* @param string $handle Template handle being displayed.
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*/
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private function call_hook($handle)
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{
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global $phpbb_hook;
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if (!empty($phpbb_hook) && $phpbb_hook->call_hook(array(__CLASS__, __FUNCTION__), $handle, $this))
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{
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if ($phpbb_hook->hook_return(array(__CLASS__, __FUNCTION__)))
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{
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$result = $phpbb_hook->hook_return_result(array(__CLASS__, __FUNCTION__));
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return array($result);
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}
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}
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return false;
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}
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/**
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* Obtains language array.
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* This is either lang property of $user property, or if
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* it is not set an empty array.
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* @return array language entries
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*/
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public function get_lang()
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{
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if (isset($this->user->lang))
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{
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$lang = $this->user->lang;
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}
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else
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{
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$lang = array();
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}
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return $lang;
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}
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/**
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* Display the handle and assign the output to a template variable
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* or return the compiled result.
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*
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* @param string $handle Handle to operate on
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* @param string $template_var Template variable to assign compiled handle to
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* @param bool $return_content If true return compiled handle, otherwise assign to $template_var
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* @return bool|string false on failure, otherwise if $return_content is true return string of the compiled handle, otherwise return true
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*/
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public function assign_display($handle, $template_var = '', $return_content = true)
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{
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ob_start();
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$result = $this->display($handle);
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$contents = ob_get_clean();
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if ($result === false)
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{
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return false;
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}
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if ($return_content)
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{
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return $contents;
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}
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$this->assign_var($template_var, $contents);
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return true;
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}
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/**
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* Obtains a template renderer for a template identified by specified
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* handle. The template renderer can display the template later.
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*
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* Template source will first be compiled into php code.
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* If template cache is writable the compiled php code will be stored
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* on filesystem and template will not be subsequently recompiled.
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* If template cache is not writable template source will be recompiled
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* every time it is needed. DEBUG_EXTRA define and load_tplcompile
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* configuration setting may be used to force templates to be always
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* recompiled.
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*
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* Returns an object implementing phpbb_template_renderer, or null
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* if template loading or compilation failed. Call render() on the
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* renderer to display the template. This will result in template
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* contents sent to the output stream (unless, of course, output
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* buffering is in effect).
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*
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* @param string $handle Handle of the template to load
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* @return phpbb_template_renderer Template renderer object, or null on failure
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* @uses phpbb_template_compile is used to compile template source
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*/
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private function _tpl_load($handle)
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{
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$output_file = $this->_compiled_file_for_handle($handle);
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$recompile = defined('DEBUG_EXTRA') ||
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!file_exists($output_file) ||
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@filesize($output_file) === 0;
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if ($recompile || $this->config['load_tplcompile'])
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{
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// Set only if a recompile or an mtime check are required.
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$source_file = $this->locator->get_source_file_for_handle($handle);
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if (!$recompile && @filemtime($output_file) < @filemtime($source_file))
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{
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$recompile = true;
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}
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}
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// Recompile page if the original template is newer, otherwise load the compiled version
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if (!$recompile)
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{
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return new phpbb_template_renderer_include($output_file, $this);
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}
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$compile = new phpbb_template_compile($this->config['tpl_allow_php'], $this->locator, $this->phpbb_root_path);
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if ($compile->compile_file_to_file($source_file, $output_file) !== false)
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{
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$renderer = new phpbb_template_renderer_include($output_file, $this);
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}
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else if (($code = $compile->compile_file($source_file)) !== false)
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{
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$renderer = new phpbb_template_renderer_eval($code, $this);
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}
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else
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{
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$renderer = null;
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}
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return $renderer;
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}
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/**
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* Determines compiled file path for handle $handle.
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*
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* @param string $handle Template handle (i.e. "friendly" template name)
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* @return string Compiled file path
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*/
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private function _compiled_file_for_handle($handle)
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{
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$source_file = $this->locator->get_filename_for_handle($handle);
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$compiled_file = $this->cachepath . str_replace('/', '.', $source_file) . '.' . $this->phpEx;
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return $compiled_file;
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}
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/**
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* Assign key variable pairs from an array
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*
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* @param array $vararray A hash of variable name => value pairs
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*/
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public function assign_vars(array $vararray)
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{
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foreach ($vararray as $key => $val)
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{
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$this->assign_var($key, $val);
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}
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}
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/**
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* Assign a single scalar value to a single key.
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*
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* Value can be a string, an integer or a boolean.
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*
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* @param string $varname Variable name
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* @param string $varval Value to assign to variable
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*/
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public function assign_var($varname, $varval)
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{
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$this->context->assign_var($varname, $varval);
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}
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/**
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* Append text to the string value stored in a key.
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*
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* Text is appended using the string concatenation operator (.).
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*
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* @param string $varname Variable name
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* @param string $varval Value to append to variable
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*/
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public function append_var($varname, $varval)
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{
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$this->context->append_var($varname, $varval);
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}
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// Docstring is copied from phpbb_template_context method with the same name.
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/**
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* Assign key variable pairs from an array to a specified block
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* @param string $blockname Name of block to assign $vararray to
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* @param array $vararray A hash of variable name => value pairs
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*/
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public function assign_block_vars($blockname, array $vararray)
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{
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return $this->context->assign_block_vars($blockname, $vararray);
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}
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// Docstring is copied from phpbb_template_context method with the same name.
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/**
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* Change already assigned key variable pair (one-dimensional - single loop entry)
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*
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* An example of how to use this function:
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* {@example alter_block_array.php}
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*
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* @param string $blockname the blockname, for example 'loop'
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* @param array $vararray the var array to insert/add or merge
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* @param mixed $key Key to search for
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*
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* array: KEY => VALUE [the key/value pair to search for within the loop to determine the correct position]
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*
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* int: Position [the position to change or insert at directly given]
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*
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* If key is false the position is set to 0
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* If key is true the position is set to the last entry
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*
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* @param string $mode Mode to execute (valid modes are 'insert' and 'change')
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*
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* If insert, the vararray is inserted at the given position (position counting from zero).
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* If change, the current block gets merged with the vararray (resulting in new key/value pairs be added and existing keys be replaced by the new value).
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*
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* Since counting begins by zero, inserting at the last position will result in this array: array(vararray, last positioned array)
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* and inserting at position 1 will result in this array: array(first positioned array, vararray, following vars)
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*
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* @return bool false on error, true on success
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*/
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public function alter_block_array($blockname, array $vararray, $key = false, $mode = 'insert')
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{
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return $this->context->alter_block_array($blockname, $vararray, $key, $mode);
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}
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/**
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* Include a separate template.
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*
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* This function is marked public due to the way the template
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* implementation uses it. It is actually an implementation function
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* and should not be considered part of template class's public API.
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*
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* @param string $filename Template filename to include
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* @param bool $include True to include the file, false to just load it
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* @uses template_compile is used to compile uncached templates
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*/
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public function _tpl_include($filename, $include = true)
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{
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$this->locator->set_filenames(array($filename => $filename));
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if (!$this->load_and_render($filename))
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{
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// trigger_error cannot be used here, as the output already started
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echo 'template->_tpl_include(): Failed including ' . htmlspecialchars($handle) . "\n";
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}
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}
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/**
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* Include a PHP file.
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*
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* If a relative path is passed in $filename, it is considered to be
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* relative to board root ($phpbb_root_path). Absolute paths are
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* also allowed.
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*
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* This function is marked public due to the way the template
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* implementation uses it. It is actually an implementation function
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* and should not be considered part of template class's public API.
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*
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* @param string $filename Path to PHP file to include
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*/
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public function _php_include($filename)
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{
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if (phpbb_is_absolute($filename))
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{
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$file = $filename;
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}
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else
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{
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$file = $this->phpbb_root_path . $filename;
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}
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if (!file_exists($file))
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{
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// trigger_error cannot be used here, as the output already started
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echo 'template->_php_include(): File ' . htmlspecialchars($file) . " does not exist\n";
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return;
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}
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include($file);
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}
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/**
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* Locates source template path, accounting for styles tree and verifying that
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* the path exists.
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*
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* @param string or array $files List of templates to locate. If there is only
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* one template, $files can be a string to make code easier to read.
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* @param bool $return_default Determines what to return if template does not
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* exist. If true, function will return location where template is
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* supposed to be. If false, function will return false.
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* @param bool $return_full_path If true, function will return full path
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* to template. If false, function will return template file name.
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* This parameter can be used to check which one of set of template
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* files is available.
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* @return string or boolean Source template path if template exists or $return_default is
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* true. False if template does not exist and $return_default is false
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*/
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public function locate($files, $return_default = false, $return_full_path = true)
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{
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// add tempalte path prefix
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$templates = array();
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if (is_string($files))
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{
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$templates[] = $this->template_path . $files;
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}
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else
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{
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foreach ($files as $file)
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{
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$templates[] = $this->template_path . $file;
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}
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}
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// use resource locator to find files
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return $this->locator->get_first_file_location($templates, $return_default, $return_full_path);
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}
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/**
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* Include JS file
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*
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* @param string $file file name
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* @param bool $locate True if file needs to be located
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*/
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public function _js_include($file, $locate = false)
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{
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// Locate file
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if ($locate)
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{
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$file = $this->locator->get_first_file_location(array($file), true, true);
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}
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$file .= (strpos($file, '?') === false) ? '?' : '&';
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$file .= 'assets_version=' . $this->config['assets_version'];
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// Add HTML code
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$code = '<script src="' . htmlspecialchars($file) . '"></script>';
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$this->context->append_var('SCRIPTS', $code);
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}
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}
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