/Quản lý website các món ăn và ẩm thực php/bbqvietnam.com/images/banners/msd1.24stable/inc/template.php

<?php
if (!defined('MSD_VERSION')) die('No direct access.');
define('TPL_DEBUG',0); // used if evaluationg of template fails
/***************************************************************************
 *                              template.php
 *                            -------------------
 *   begin                : Saturday, Feb 13, 2001
 *   copyright            : (C) 2001 The phpBB Group
 *   email                : support@phpbb.com
 *
 *   $Id: template.php,v 1.10.2.3 2002/12/21 19:09:57 psotfx Exp $
 *
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 ***************************************************************************/

/**
 * Template class. By Nathan Codding of the phpBB group.
 * The interface was originally inspired by PHPLib templates,
 * and the template file formats are quite similar.
 *
 */

class MSDTemplate
{
	var $classname="MSDTemplate";
	
	// variable that holds all the data we'll be substituting into
	// the compiled templates.
	// ...
	// This will end up being a multi-dimensional array like this:
	// $this->_tpldata[block.][iteration#][child.][iteration#][child2.][iteration#][variablename] == value
	// if it's a root-level variable, it'll be like this:
	// $this->_tpldata[.][0][varname] == value
	var $_tpldata=array();
	
	// Hash of filenames for each template handle.
	var $files=array();
	
	// Root template directory.
	var $root="";
	
	// this will hash handle names to the compiled code for that handle.
	var $compiled_code=array();
	
	// This will hold the uncompiled code for that handle.
	var $uncompiled_code=array();
	
	/**
	 * Constructor. Simply sets the root dir.
	 *
	 */
	function MSDTemplate($root=".")
	{
		$this->set_rootdir($root);
	}
	
	/**
	 * Destroys this template object. Should be called when you're done with it, in order
	 * to clear out the template data so you can load/parse a new template set.
	 */
	function destroy()
	{
		$this->_tpldata=array();
	}
	
	/**
	 * Sets the template root directory for this Template object.
	 */
	function set_rootdir($dir)
	{
		if (!is_dir($dir))
		{
			return false;
		}
		$this->root=$dir;
		return true;
	}
	
	/**
	 * Sets the template filenames for handles. $filename_array
	 * should be a hash of handle => filename pairs.
	 */
	function set_filenames($filename_array)
	{
		if (!is_array($filename_array))
		{
			return false;
		}
		
		reset($filename_array);
		while (list ($handle, $filename)=each($filename_array))
		{
			$this->files[$handle]=$this->make_filename($filename);
		}
		
		return true;
	}
	
	/**
	 * Load the file for the handle, compile the file,
	 * and run the compiled code. This will print out
	 * the results of executing the template.
	 */
	function pparse($handle)
	{
		// Edit DSB: autimatically assign language vars
		global $lang;
		$this->assign_vars($lang);
		
		if (!$this->loadfile($handle))
		{
			die("Template->pparse(): Couldn't load template file for handle $handle");
		}
		
		// actually compile the template now.
		if (!isset($this->compiled_code[$handle]) || empty($this->compiled_code[$handle]))
		{
			// Actually compile the code now.
			$this->compiled_code[$handle]=$this->compile($this->uncompiled_code[$handle]);
		}
		
		// Run the compiled code.
		if (defined(TPL_DEBUG) && TPL_DEBUG>0) echo '<pre>'.htmlspecialchars($this->compiled_code[$handle]).'</pre>';
		eval($this->compiled_code[$handle]);
		return true;
	}
	
	/**
	 * Inserts the uncompiled code for $handle as the
	 * value of $varname in the root-level. This can be used
	 * to effectively include a template in the middle of another
	 * template.
	 * Note that all desired assignments to the variables in $handle should be done
	 * BEFORE calling this function.
	 */
	function assign_var_from_handle($varname, $handle)
	{
		if (!$this->loadfile($handle))
		{
			die("Template->assign_var_from_handle(): Couldn't load template file for handle $handle");
		}
		
		// Compile it, with the "no echo statements" option on.
		$_str="";
		$code=$this->compile($this->uncompiled_code[$handle],true,'_str');
		
		// evaluate the variable assignment.
		eval($code);
		// assign the value of the generated variable to the given varname.
		$this->assign_var($varname,$_str);
		
		return true;
	}
	
	/**
	 * Block-level variable assignment. Adds a new block iteration with the given
	 * variable assignments. Note that this should only be called once per block
	 * iteration.
	 */
	function assign_block_vars($blockname, $vararray)
	{
		if (strstr($blockname,'.'))
		{
			// Nested block.
			$blocks=explode('.',$blockname);
			$blockcount=sizeof($blocks) - 1;
			$str='$this->_tpldata';
			for ($i=0; $i < $blockcount; $i++)
			{
				$str.='[\'' . $blocks[$i] . '.\']';
				eval('$lastiteration = sizeof(' . $str . ') - 1;');
				$str.='[' . $lastiteration . ']';
			}
			// Now we add the block that we're actually assigning to.
			// We're adding a new iteration to this block with the given
			// variable assignments.
			$str.='[\'' . $blocks[$blockcount] . '.\'][] = $vararray;';
			
			// Now we evaluate this assignment we've built up.
			eval($str);
		}
		else
		{
			// Top-level block.
			// Add a new iteration to this block with the variable assignments
			// we were given.
			$this->_tpldata[$blockname . '.'][]=$vararray;
		}
		
		return true;
	}
	
	/**
	 * Root-level variable assignment. Adds to current assignments, overriding
	 * any existing variable assignment with the same name.
	 */
	function assign_vars($vararray)
	{
		global $lang;
		while (list ($key, $val)=each($vararray))
		{
			$this->_tpldata['.'][0][$key]=$val;
		}
		
		return true;
	}
	
	/**
	 * Root-level variable assignment. Adds to current assignments, overriding
	 * any existing variable assignment with the same name.
	 */
	function assign_var($varname, $varval)
	{
		$this->_tpldata['.'][0][$varname]=$varval;
		
		return true;
	}
	
	/**
	 * Generates a full path+filename for the given filename, which can either
	 * be an absolute name, or a name relative to the rootdir for this Template
	 * object.
	 */
	function make_filename($filename)
	{
		// Check if it's an absolute or relative path.
		/*
		if (substr($filename, 0, 1) != '/')
		{
       		$filename = $this->root . '/' . $filename;
		}
*/
		if (!file_exists($filename))
		{
			die("Template->make_filename(): Error - file $filename does not exist");
		}
		
		return $filename;
	}
	
	/**
	 * If not already done, load the file for the given handle and populate
	 * the uncompiled_code[] hash with its code. Do not compile.
	 */
	function loadfile($handle)
	{
		// If the file for this handle is already loaded and compiled, do nothing.
		if (isset($this->uncompiled_code[$handle]) && !empty($this->uncompiled_code[$handle]))
		{
			return true;
		}
		
		// If we don't have a file assigned to this handle, die.
		if (!isset($this->files[$handle]))
		{
			die("Template->loadfile(): No file specified for handle $handle");
		}
		
		$filename=$this->files[$handle];
		
		$str=implode("",@file($filename));
		if (empty($str))
		{
			die("Template->loadfile(): File $filename for handle $handle is empty");
		}
		
		$this->uncompiled_code[$handle]=$str;
		
		return true;
	}
	
	/**
	 * Compiles the given string of code, and returns
	 * the result in a string.
	 * If "do_not_echo" is true, the returned code will not be directly
	 * executable, but can be used as part of a variable assignment
	 * for use in assign_code_from_handle().
	 */
	function compile($code, $do_not_echo=false, $retvar='')
	{
		// replace \ with \\ and then ' with \'.
		$code=str_replace('\\','\\\\',$code);
		$code=str_replace('\'','\\\'',$code);

		
		// change template varrefs into PHP varrefs
		

		// This one will handle varrefs WITH namespaces
		$varrefs=array();
		preg_match_all('#\{(([a-z0-9\-_]+?\.)+?)([a-z0-9\-_]+?)\}#is',$code,$varrefs);
		$varcount=sizeof($varrefs[1]);
		for ($i=0; $i < $varcount; $i++)
		{
			$namespace=$varrefs[1][$i];
			$varname=$varrefs[3][$i];
			$new=$this->generate_block_varref($namespace,$varname);
			
			$code=str_replace($varrefs[0][$i],$new,$code);
		}
		
		// This will handle the remaining root-level varrefs
		$code=preg_replace('#\{([a-z0-9\-_]*?)\}#is','\' . ( ( isset($this->_tpldata[\'.\'][0][\'\1\']) ) ? $this->_tpldata[\'.\'][0][\'\1\'] : \'\' ) . \'',$code);
		
		// Break it up into lines.
		$code_lines=explode("\n",$code);
		
		$block_nesting_level=0;
		$block_names=array();
		$block_names[0]=".";
		
		// Second: prepend echo ', append ' . "\n"; to each line.
		$line_count=sizeof($code_lines);
		for ($i=0; $i < $line_count; $i++)
		{
			$code_lines[$i]=chop($code_lines[$i]);
			if (preg_match('#<!-- BEGIN (.*?) -->#',$code_lines[$i],$m))
			{
				$n[0]=$m[0];
				$n[1]=$m[1];
				
				// Added: dougk_ff7-Keeps templates from bombing if begin is on the same line as end.. I think. :)
				if (preg_match('#<!-- END (.*?) -->#',$code_lines[$i],$n))
				{
					$block_nesting_level++;
					$block_names[$block_nesting_level]=$m[1];
					if ($block_nesting_level < 2)
					{
						// Block is not nested.
						$code_lines[$i]='$_' . $n[1] . '_count = ( isset($this->_tpldata[\'' . $n[1] . '.\']) ) ?  sizeof($this->_tpldata[\'' . $n[1] . '.\']) : 0;';
						$code_lines[$i].="\n" . 'for ($_' . $n[1] . '_i = 0; $_' . $n[1] . '_i < $_' . $n[1] . '_count; $_' . $n[1] . '_i++)';
						$code_lines[$i].="\n" . '{';
					}
					else
					{
						// This block is nested.
						

						// Generate a namespace string for this block.
						$namespace=implode('.',$block_names);
						// strip leading period from root level..
						$namespace=substr($namespace,2);
						// Get a reference to the data array for this block that depends on the
						// current indices of all parent blocks.
						$varref=$this->generate_block_data_ref($namespace,false);
						// Create the for loop code to iterate over this block.
						$code_lines[$i]='$_' . $n[1] . '_count = ( isset(' . $varref . ') ) ? sizeof(' . $varref . ') : 0;';
						$code_lines[$i].="\n" . 'for ($_' . $n[1] . '_i = 0; $_' . $n[1] . '_i < $_' . $n[1] . '_count; $_' . $n[1] . '_i++)';
						$code_lines[$i].="\n" . '{';
					}
					
					// We have the end of a block.
					unset($block_names[$block_nesting_level]);
					$block_nesting_level--;
					$code_lines[$i].='} // END ' . $n[1];
					$m[0]=$n[0];
					$m[1]=$n[1];
				}
				else
				{
					// We have the start of a block.
					$block_nesting_level++;
					$block_names[$block_nesting_level]=$m[1];
					if ($block_nesting_level < 2)
					{
						// Block is not nested.
						$code_lines[$i]='$_' . $m[1] . '_count = ( isset($this->_tpldata[\'' . $m[1] . '.\']) ) ? sizeof($this->_tpldata[\'' . $m[1] . '.\']) : 0;';
						$code_lines[$i].="\n" . 'for ($_' . $m[1] . '_i = 0; $_' . $m[1] . '_i < $_' . $m[1] . '_count; $_' . $m[1] . '_i++)';
						$code_lines[$i].="\n" . '{';
					}
					else
					{
						// This block is nested.
						

						// Generate a namespace string for this block.
						$namespace=implode('.',$block_names);
						// strip leading period from root level..
						$namespace=substr($namespace,2);
						// Get a reference to the data array for this block that depends on the
						// current indices of all parent blocks.
						$varref=$this->generate_block_data_ref($namespace,false);
						// Create the for loop code to iterate over this block.
						$code_lines[$i]='$_' . $m[1] . '_count = ( isset(' . $varref . ') ) ? sizeof(' . $varref . ') : 0;';
						$code_lines[$i].="\n" . 'for ($_' . $m[1] . '_i = 0; $_' . $m[1] . '_i < $_' . $m[1] . '_count; $_' . $m[1] . '_i++)';
						$code_lines[$i].="\n" . '{';
					}
				}
			}
			else if (preg_match('#<!-- END (.*?) -->#',$code_lines[$i],$m))
			{
				// We have the end of a block.
				unset($block_names[$block_nesting_level]);
				$block_nesting_level--;
				$code_lines[$i]='} // END ' . $m[1];
			}
			else
			{
				// We have an ordinary line of code.
				if (!$do_not_echo)
				{
					$code_lines[$i]='echo \'' . $code_lines[$i] . '\' . "\\n";';
				}
				else
				{
					$code_lines[$i]='$' . $retvar . '.= \'' . $code_lines[$i] . '\' . "\\n";';
				}
			}
		}
		
		// Bring it back into a single string of lines of code.
		$code=implode("\n",$code_lines);
		return $code;
	
	}
	
	/**
	 * Generates a reference to the given variable inside the given (possibly nested)
	 * block namespace. This is a string of the form:
	 * ' . $this->_tpldata['parent'][$_parent_i]['$child1'][$_child1_i]['$child2'][$_child2_i]...['varname'] . '
	 * It's ready to be inserted into an "echo" line in one of the templates.
	 * NOTE: expects a trailing "." on the namespace.
	 */
	function generate_block_varref($namespace, $varname)
	{
		// Strip the trailing period.
		$namespace=substr($namespace,0,strlen($namespace) - 1);
		
		// Get a reference to the data block for this namespace.
		$varref=$this->generate_block_data_ref($namespace,true);
		// Prepend the necessary code to stick this in an echo line.
		

		// Append the variable reference.
		$varref.='[\'' . $varname . '\']';
		
		$varref='\' . ( ( isset(' . $varref . ') ) ? ' . $varref . ' : \'\' ) . \'';
		
		return $varref;
	
	}
	
	/**
	 * Generates a reference to the array of data values for the given
	 * (possibly nested) block namespace. This is a string of the form:
	 * $this->_tpldata['parent'][$_parent_i]['$child1'][$_child1_i]['$child2'][$_child2_i]...['$childN']
	 *
	 * If $include_last_iterator is true, then [$_childN_i] will be appended to the form shown above.
	 * NOTE: does not expect a trailing "." on the blockname.
	 */
	function generate_block_data_ref($blockname, $include_last_iterator)
	{
		// Get an array of the blocks involved.
		$blocks=explode(".",$blockname);
		$blockcount=sizeof($blocks) - 1;
		$varref='$this->_tpldata';
		// Build up the string with everything but the last child.
		for ($i=0; $i < $blockcount; $i++)
		{
			$varref.='[\'' . $blocks[$i] . '.\'][$_' . $blocks[$i] . '_i]';
		}
		// Add the block reference for the last child.
		$varref.='[\'' . $blocks[$blockcount] . '.\']';
		// Add the iterator for the last child if requried.
		if ($include_last_iterator)
		{
			$varref.='[$_' . $blocks[$blockcount] . '_i]';
		}
		
		return $varref;
	}

}

?>