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//homepage/v-mt/php/lib/prefilter.mt_to_smarty.php

<?php
# Movable Type (r) (C) 2001-2008 Six Apart, Ltd. All Rights Reserved.
# This code cannot be redistributed without permission from www.sixapart.com.
# For more information, consult your Movable Type license.
#
# $Id: prefilter.mt_to_smarty.php 1187 2008-01-10 14:27:38Z takayama $

/* Movable Type template -> Smarty template
  
    <$MTVariable$> -> {Variable}
  
    <MTVariable> -> {Variable}
  
    <MTVariable this="that"> -> {Variable this="that"}
  
    <MTVariable dirify="1"> -> {Variable|dirify:"1"}
  
    <MTEntries>...</MTEntries> -> {Entries}...{/Entries}
  
    <MTIfNonEmpty var="MTVariable">
      ...
    <MTElse>...</MTElse>
    </MTIfNonEmpty>
 -> {IfNonEmpty var="MTVariable"}{if $conditional}
      ...
    {/if}{if !$conditional}...{/if}{if $conditional}
    {/if}{/IfNonEmpty}

Note that all MT 'variable' tags are translated to functions.
This is necessary since you can't preload all the data that a
MT template may require. This is equivalent to the MT::Template::Context
approach-- every 'Variable' tag invokes a handler function.

The "Else" tag was a tricky beast. Ironic since I added that
syntax to MT myself. Here's how I decided to implement it. Each
'conditional' tag is handled a little differently than regular
block tags. They have a requirement to set a 'conditional' template
variable to 1 or 0 depending on whether the condition is met or not.
The setting for 'conditional' must be preserved and restored using
the 'localize' and 'restore' routines. Regardless of the value of
$conditional, the block function must return $content either way.
This allows the inner 'if' statements to do their work. See above
for how the '$conditional' variable is used.
*/
function smarty_prefilter_mt_to_smarty($tpl_source, &$ctx2) {
    // used to serialize attributes when creating tag stack for
    // function tags.
    $var_export = function_exists('var_export');

global $mt;
    $ctx =& $mt->context();
    $ldelim = $ctx->left_delimiter;
    $rdelim = $ctx->right_delimiter;
    $smart_source = '';
    $tokenstack = array();
    $tagstack = array();

# special tag step for stripping any conditional 'static' code.
    $tpl_source = preg_replace('/<MT:?IfStatic[^>]*?>.*?<\/MT:?IfStatic>/is', '', $tpl_source);
    $tpl_source = preg_replace('/<MT:?Ignore\b[^>]*?>.*?<\/MT:?Ignore>/is', '', $tpl_source);

if ($parts = preg_split('!(<(?:\$?|/)MT(?:(?:<[^>]*?>|\'[^\']*?\'|"[^"]*?"|.)+?)(?:\$?|/)>)!is', $tpl_source, -1,
                       PREG_SPLIT_DELIM_CAPTURE)) {
        foreach ($parts as $part) {
            if (!preg_match('!<(\$?|/)(MT:?(?:<[^>]*?>|\'[^\']*?\'|"[^"]*?"|.)+?)(\$?|/)>!is', $part, $matches)) {
                $smart_source .= $part;
                continue;
            }

list($wholetag, $open, $tag, $close) = $matches;

$attrargs = '';
            $modargs = '';

list($mttag, $args) = preg_split('!\s+!s', $tag, 2);
            $mttag or $mttag = $tag;
            // ignore namespace delimiter, for now
            $mttag = preg_replace('/:/', '', strtolower($mttag));
            $attrs = array();

if (preg_match_all('!(?:(\w+)\s*=\s*(["\'])((?:<[^>]*?>|\'[^\']*?\'|"[^"]*?"|.)*?)?\2((?:[,:](["\'])((?:<[^>]*?>|.)*?)?\5)*)?|(\w+))!s', $args,
                               $arglist, PREG_SET_ORDER)) {
                for ($a = 0; $a < count($arglist); $a++) {
                    if (isset($arglist[$a][7])) {
                        $attr = 'name';
                        $attrs[$attr] = $arglist[$a][7];
                        $quote = '"';
                    } else {
                        $attr = $arglist[$a][1];
                        $attrs[$attr] = $arglist[$a][3];
                        $quote = $arglist[$a][2];
                    }
                    if (preg_match('/^\$([A-Za-z_](\w|\.)*)$/', $attrs[$attr], $matches)) {
                        if (preg_match('/^(config|request)\.(.+)$/i', $matches[1], $m)) {
                            if (strtolower($m[1]) == 'config') {
                                $attrs[$attr] = $mt->config[strtolower($m[2])];
                            }
                            elseif (strtolower($m[1]) == 'request') {
                                $attrs[$attr] = '$smarty.request.' . $m[2];
                            }
                        } else {
                            $attrs[$attr] = '$vars.' . $matches[1];
                        }
                        $quote = '';
                    } else {
                        if (!preg_match('/`/', $attrs[$attr])) {
                            $attrs[$attr] = preg_replace('/\$/', '\\\\$', $attrs[$attr]);
                        }
                    }
                    if ($ctx->global_attr[$attr]) {
                        $modargs .= '|';
                        if ($ctx->global_attr[$attr] != '1') {
                            $modargs .= $ctx->global_attr[$attr];
                        } else {
                            $modargs .= $attr;
                        }
                        $modargs .= ':' . $quote . $attrs[$attr] . $quote;
                        if (isset($arglist[$a][4])) {
                           $modargs .= _parse_modifier($arglist[$a][4]);
                        }
                    } else {
                        // reconstruct attribute in case we modified
                        // the attribute to handle variable references
                        $attrargs .= ' ' . $attr . '=' . $quote . $attrs[$attr] . $quote;
                        if (isset($arglist[$a][4])) {
                            $attrargs .= _parse_modifier($arglist[$a][4]);
                        }
                    }
                }
            }
            if (isset($ctx->sanitized[$mttag])) {
                if (!isset($attrs['sanitize'])) {
                    $modargs = '|sanitize:"1"' . $modargs;
                }
            }
            if (isset($ctx->nofollowed[$mttag])) {
                if (!isset($attrs['nofollowfy'])) {
                    $modargs .= "|nofollowfy:\"$mttag\"";
                }
            }

if (preg_match('!^MTIf!i', $mttag) ||
                preg_match('!^MTHas!i', $mttag) ||
                (preg_match('![a-z]If[A-Z]!i', $mttag) &&
                !preg_match('![a-z]Modified[A-Z]!i', $mttag) &&
                !preg_match('![a-z]Notify[A-Z]!i', $mttag)) ||
                isset($ctx->conditionals[$mttag])) {
                $conditional = 1;
            } elseif (($mttag == 'mtentries') ||
                ($mttag == 'mtcomments') ||
                ($mttag == 'mtpages') ||
                ($mttag == 'mtcommentreplies')) {
                $conditional = 1;
            } else {
                $conditional = 0;
            }

// force the elements in $vars to always to act like a function
            if ($open == '$') {
                $open = '';
            }

if ((($open == '/' && $conditional) ||
                 ($mttag == 'mtelse' || $mttag == 'mtelseif')) &&
                $close != '/') {
                $smart_source .= $ldelim.'/if'.$rdelim;
            }

$tokname = null;
            if (isset($ctx->needs_tokens[$mttag])) {
                if ($open != '/') {
                    $tokname = uniqid(rand());
                    $attrargs .= ' token_fn="smarty_fun_'.$tokname.'"';
                    array_push($tokenstack, $tokname);
                } else {
                    $tokname = array_pop($tokenstack);
                    $smart_source .= $ldelim.'/defun'.$rdelim;
                }
            }

$open_mod_args = false; $close_mod_args = ''; $uniqid = '';
            $fn_tag = 0;
            if (_block_handler_exists($ctx2, $mttag)) {
                if ($open == '/') {
                    $tag = array_pop($tagstack);
                    if (preg_match('/^(.+?)(\|.+)$/', $tag, $matches)) {
                        $tag = $matches[1];
                        $close_mod_args = $matches[2];
                    }
                    if (($tag == 'mtelse' || $tag == 'mtelseif') && ($tag != $mttag)) {
                        $smart_source .= $ldelim . '/' . $tag . $rdelim;
                        if ($mttag == $tagstack[count($tagstack)-1]) {
                            $tag = array_pop($tagstack);
                        } elseif (preg_match('/^('. $mttag . ')(\|.+)$/', $tagstack[count($tagstack)-1], $matches)) {
                            $tag = array_pop($tagstack);
                            $tag = $matches[1];
                            $close_mod_args = $matches[2];
                        }
                    }
                    if ($tag != $mttag) {
                        die("error in template: $tag found but $mttag was expected\n");
                    }
                } else {
                    if ($mttag == 'mtelse' || $mttag == 'mtelseif') {
                        if ($tagstack[count($tagstack)-1] == 'mtelse' || $tagstack[count($tagstack)-1] == 'mtelseif') {
                            $smart_source .= $ldelim . '/' . $tagstack[count($tagstack)-1] . $rdelim;
                            array_pop($tagstack);
                        }
                    }
                    $tagstack[] = $mttag . $modargs;
                    if ($modargs != '') {
                        $modargs = '';
                        $open_mod_args = true;
                    }
                }
            } else {
                if ($close == '/') $close = '';
                $fn_tag = 1;
            }

if ($open_mod_args) {
                $smart_source .= $ldelim . 'capture' . $rdelim;
            }

if ($fn_tag) {
                $smart_source .= $ldelim . 'php' . $rdelim
                    . '$this->_tag_stack[] = array("' . $mttag . '"'
                    // . ', array(' . implode(',', $ctx2->_compile_arg_list(null, null, $attrs, $dummy)) . '));'
                    . ($var_export ? ', ' . var_export($attrs, true) : '')
                    . ');' . $ldelim . '/php' . $rdelim;
            }

$smart_source .= $ldelim.$open.
                                  $mttag.
                                  $modargs.
                                  $attrargs.
                                  $rdelim;
            if ($fn_tag) {
                $smart_source .= $ldelim . 'php' . $rdelim
                    . 'array_pop($this->_tag_stack);'
                    . $ldelim . '/php' . $rdelim;
            }

if ($close_mod_args) {
                $smart_source .= $ldelim . '/capture' . $rdelim . $ldelim . '$smarty.capture.default' . $close_mod_args . $rdelim;
            }

if (isset($tokname)) {
                if ($open != '/') {
                    $smart_source .= $ldelim.'defun name="'.$tokname.'"'.$rdelim;
                }
            }

if ($mttag == 'mtelse') {
                if ($open != '/') {
                    if (count($args)) {
                        # else-if
                        $smart_source .= $ldelim.'if $elseif_conditional'.$rdelim;
                    } else {
                        # else
                        $smart_source .= $ldelim.'if !$conditional'.$rdelim;
                    }
                } else {
                    $smart_source .= $ldelim.'if $conditional'.$rdelim;
                }
            } elseif ($mttag == 'mtelseif') {
                if ($open != '/') {
                    if (count($args)) {
                        # else-if
                        $smart_source .= $ldelim.'if $elseif_conditional'.$rdelim;
                    }
                }
            } elseif ($open != '/' && $conditional && $close != '/') {
                $smart_source .= $ldelim.'if $conditional'.$rdelim;
            } elseif ($close == '/') {
                $smart_source .= $ldelim.'/'.$mttag.$rdelim;
            }
        }
    } else {
        $smart_source = $tpl_source;
    }

// allow normal php markers to work-- change them to
    // smarty php blocks...
    $smart_source = preg_replace('/<\?php(\s*.*?)\?>/s',
                                 $ldelim.'php'.$rdelim.'\1'.';'.$ldelim.'/php'.$rdelim, $smart_source);
#    echo $smart_source;
    return $smart_source;
}

function _block_handler_exists(&$smarty, $name) {
    if ($smarty->_plugins['block'][$name]) return true;
    if ($smarty->_get_plugin_filepath('block', $name)) return true;
    return false;
}
?>

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