2 /*=====================================================================*\
3 || ###################################################################
4 || # Blue Static ISSO Framework [#]issoversion[#]
5 || # Copyright ©2002-[#]year[#] Blue Static
7 || # This program is free software; you can redistribute it and/or modify
8 || # it under the terms of the GNU General Public License as published by
9 || # the Free Software Foundation; version [#]gpl[#] of the License.
11 || # This program is distributed in the hope that it will be useful, but
12 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 || # You should have received a copy of the GNU General Public License along
17 || # with this program; if not, write to the Free Software Foundation, Inc.,
18 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
19 || ###################################################################
20 \*=====================================================================*/
23 * Database-Driven Template System
30 * Database-Driven Template System
32 * This framework is a backend to the database template engine and
33 * contains all the parsing algorithms.
36 * $this->pre_parse_hook - Name of the function to execute on
37 * a template before the parsing occurs
40 * @copyright Copyright ©2002 - [#]year[#], Blue Static
48 * Framework registry object
55 * Name of the database table templates are in
62 * Name of the table column template names are in
69 * Name of the table column templates are in
76 * Additional WHERE clauses for the template fetch SQL
83 * The name of the function phrases are fetched with
87 var $langcall = 'gettext';
90 * The name of the function phrases are sprintf() parsed with
94 var $langconst = 'sprintf';
97 * Array of pre-compiled templates that are stored to decrease server load
101 var $cache = array();
104 * A list of the number of times each template has been used
108 var $usage = array();
111 * A list of templates that weren't cached, but are still used
115 var $uncached = array();
118 * Whether or not the page has been flush()'d already
122 var $doneflush = false
;
125 * The name of a function that is called before template parsing of phrases and conditionals occurs
129 var $pre_parse_hook = ':=NO METHOD=:';
132 * Fields array that is used in this module
137 'tablename' => array(REQ_YES
, null
, false
),
138 'namecolumn' => array(REQ_YES
, null
, false
),
139 'datacolumn' => array(REQ_YES
, null
, false
),
140 'extrawhere' => array(REQ_NO
, null
, false
),
141 'langcall' => array(REQ_YES
, null
, true
),
142 'langconst' => array(REQ_YES
, null
, true
),
143 'pre_parse_hook' => array(REQ_NO
, null
, false
)
146 // ###################################################################
150 function __construct(&$registry)
152 $this->registry
=& $registry;
155 // ###################################################################
157 * (PHP 4) Constructor
159 function Template(&$registry)
161 $this->__construct($registry);
164 // ###################################################################
166 * Initializes the class and all subclasses under a common package name
170 * @return string The package name
172 function init_as_package()
177 // ###################################################################
183 * @param string Field name
184 * @param mixed Value of the field
186 function set($name, $value)
188 $this->registry
->do_set($name, $value, 'template');
191 // ###################################################################
197 * @param string Field name
199 * @return mixed Value of the field
201 function get($fieldname)
203 return $this->registry
->do_get($fieldname, 'template');
206 // ###################################################################
208 * Takes an array of template names, loads them, and then stores a
209 * parsed version for optimum speed.
213 * @param array List of template names to be cached
215 function cache($namearray)
217 if (sizeof($this->cache
) > 0)
219 trigger_error('You cannot cache templates more than once per initialization', E_USER_WARNING
);
223 $templates = $this->registry
->modules
[ISSO_DB_LAYER
]->query("SELECT * FROM " . $this->tablename
. " WHERE " . $this->namecolumn
. " IN ('" . implode("', '", $namearray) . "')" . ($this->extrawhere ?
' ' . $this->extrawhere
: ''));
224 while ($template = $this->registry
->modules
[ISSO_DB_LAYER
]->fetch_array($templates))
226 $this->cache
[ $template[ $this->namecolumn
] ] = $this->_parse($template[ $this->datacolumn
]);
227 $this->usage
[ $template[ $this->namecolumn
] ] = 0;
232 // ###################################################################
234 * Loads a template from the cache or the _load function and stores the
235 * parsed version of it
239 * @param string The name of the template
241 * @return string A parsed and loaded template
243 function fetch($name)
245 if (isset($this->cache
["$name"]))
247 $template = $this->cache
["$name"];
251 $this->uncached
[] = $name;
252 $this->registry
->debug("Manually loading template `$name`");
253 $template = $this->_load($name);
254 $template = $this->_parse($template);
257 if (!isset($this->usage
["$name"]))
259 $this->usage
["$name"] = 0;
262 $this->usage
["$name"]++
;
267 // ###################################################################
269 * Output a template fully compiled to the browser
273 * @param string Compiled and ready template
275 function flush($template)
279 if (empty($template))
281 trigger_error('There was no output to print', E_USER_ERROR
);
285 if ($this->registry
->debug
AND isset($_GET['query']))
287 if (is_array($this->registry
->modules
[ISSO_DB_LAYER
]->history
))
289 foreach ($this->registry
->modules
[ISSO_DB_LAYER
]->history
AS $query)
291 echo $this->registry
->modules
[ISSO_DB_LAYER
]->construct_query_debug($query);
297 if ($this->doneflush
)
299 trigger_error('A template has already been sent to the output buffer', E_USER_ERROR
);
303 $template = str_replace('</body>', $this->registry
->construct_debug_block(true
) . '</body>', $template);
308 // ###################################################################
310 * Loads an additional template from the database
314 * @param string The name of the template
316 * @return string Template data from the database
318 function _load($name)
320 if ($template = $this->registry
->modules
[ISSO_DB_LAYER
]->query_first("SELECT * FROM " . $this->tablename
. " WHERE " . $this->namecolumn
. " = '$name'" . ($this->extrawhere ?
' ' . $this->extrawhere
: '')))
322 return $template[ $this->datacolumn
];
326 trigger_error("The template '$name' could not be loaded", E_USER_ERROR
);
331 // ###################################################################
333 * A wrapper for all the parsing functions and compiling functins
337 * @param string Unparsed template data
339 * @return string Parsed template data
341 function _parse($template)
343 $this->registry
->check_isso_fields(get_class($this));
345 $template = str_replace('"', '\"', $template);
347 if (function_exists($this->pre_parse_hook
))
349 $template = call_user_func($this->pre_parse_hook
, $template);
352 $template = $this->_parse_phrases($template);
353 $template = $this->_parse_conditionals($template);
357 // ###################################################################
359 * Prepares language and locale information inside templates
363 * @param string Template data to be processed
365 * @return string Language-ready template data
367 function _parse_phrases($template)
369 $tag_start = '<lang ';
370 $tag_start_end = '\">';
371 $tag_end = '</lang>';
373 $location_start = -1;
378 // Find the start language object tag
379 $location_start = strpos($template, $tag_start, $location_end +
1);
380 if ($location_start === false
)
386 $location_end = strpos($template, $tag_end, $location_end +
strlen($tag_end));
387 if ($location_end === false
)
392 // Extract the language object
393 $phrase_bunch = substr($template, $location_start, ($location_end +
strlen($tag_end)) - $location_start);
395 // Find the close to the opening <lang>
396 $close_of_open = strpos($phrase_bunch, $tag_start_end);
397 if ($close_of_open === false
)
402 // Extract the opening tag so it can be parsed
403 $init_tag = substr($phrase_bunch, 0, ($close_of_open +
strlen($tag_start_end)));
404 $init_tag = str_replace($tag_start, '', $init_tag);
405 $init_tag = substr($init_tag, 0, strlen($init_tag) - 1);
407 // Get the args out of the tag
408 $args = preg_split('#([0-9].*?)=#', $init_tag);
409 foreach ($args AS $arg)
411 if ($arg AND $arg != ' ')
414 $arg = substr($arg, 2);
415 $arg = substr($arg, 0, strlen($arg) - 2);
420 // Just get the phrase name
421 $phrase_name = preg_replace('#<lang(.*?)>(.*?)</lang>#i', '$2', $phrase_bunch);
423 // Wrap the parsed data into the build function
424 $function_wrap = '" . ' . $this->langconst
. '("' . /*str_replace(array('\"', "'"), array('"', "\'"),*/ $phrase_name/*)*/ . '", "' . implode('", "', $arglist) . '") . "';
426 // Replace the fully-parsed string back into the template
427 $template = substr_replace($template, $function_wrap, $location_start, $location_end +
strlen($tag_end) - $location_start);
432 // Process the empty phrase objects -- do this now so we don't have to worry about it when we're parsing later
433 $template = preg_replace('#\{@\\\"(.*?)\\\"\}#ise', '$this->_phrase_string(\'$1\')', $template);
438 // ###################################################################
440 * Turns a localized phrase tag into a function call
444 * @param string Phrase text
446 * @return string Function call for phrase text
448 function _phrase_string($text)
450 return '" . ' . $this->langcall
. '(\'' . str_replace(array('\\\"', "'"), array('"', "\'"), $text) . '\') . "';
453 // ###################################################################
455 * Parser for in-line template conditionals
459 * @param string Template data awaiting processing
461 * @return string Parsed template data
463 function _parse_conditionals($template)
466 $tag_start = '<if condition=\"';
467 $tag_start_end = '\">';
468 $tag_else = '<else />';
474 // the information about the current active tag
483 if (strpos($template, $tag_start) === false
)
488 for ($i = $offset; $i < strlen($template); $i++
)
490 // we've found ourselves a conditional!
491 if (substr($template, $i, strlen($tag_start)) == $tag_start)
493 // push the position into the tag stack
496 array_push($stack, $i);
500 $tag_full['posi'] = $i;
504 else if (substr($template, $i, strlen($tag_else)) == $tag_else)
506 if (sizeof($stack) == 0 AND !isset($tag_full['else']))
508 $tag_full['else'] = $i;
511 // do we have an end tag?
512 else if (substr($template, $i, strlen($tag_end)) == $tag_end)
514 if (sizeof($stack) != 0)
520 // calculate the position of the end tag
521 $tag_full['posf'] = $i +
strlen($tag_end) - 1;
523 // extract the entire conditional from the template
524 $fullspread = substr($template, $tag_full['posi'], $tag_full['posf'] - $tag_full['posi'] +
1);
526 // remove the beginning tag
527 $conditional = substr($fullspread, strlen($tag_start));
529 // find the end of the expression
530 $temp_end = strpos($conditional, $tag_start_end);
532 // save the expression
533 $parsed[0] = stripslashes(substr($conditional, 0, $temp_end));
535 // remove the expression from the conditional
536 $conditional = substr($conditional, strlen($parsed[0]) +
strlen($tag_start_end));
538 // remove the tailing end tag
539 $conditional = substr($conditional, 0, strlen($conditional) - strlen($tag_end));
542 if (isset($tag_full['else']))
544 // now relative to the start of the <if>
545 $relpos = $tag_full['else'] - $tag_full['posi'];
547 // calculate the length of the expression and opening tag
548 $length = strlen($parsed[0]) +
strlen($tag_start) +
strlen($tag_start_end);
550 // relative to the start of iftrue
551 $elsepos = $relpos - $length;
553 $parsed[1] = substr($conditional, 0, $elsepos);
554 $parsed[2] = substr($conditional, $elsepos +
strlen($tag_else));
559 $parsed[1] = $conditional;
564 // final parsed output
565 $parsed = '" . ((' . stripslashes($parsed[0]) . ') ? "' . $parsed[1] . '" : "' . $parsed[2] . '") . "';
567 // replace the conditional
568 $template = str_replace($fullspread, $parsed, $template);
571 $offset = $tag_full['posi'] +
strlen($tag_start) +
strlen($tag_start_end);
575 unset($fullspread, $conditional, $temp_end, $relpos, $length, $elsepos);
585 // ###################################################################
587 * Debugging function used to print characters in a string that are
588 * around a certain position.
592 * @param string The haystack string
593 * @param integer Position to print around
595 function print_around($str, $pos)
597 echo '>>> PA >>>>>>>>[';
598 echo htmlspecialchars($str[ $pos - 5 ]);
599 echo htmlspecialchars($str[ $pos - 4 ]);
600 echo htmlspecialchars($str[ $pos - 3 ]);
601 echo htmlspecialchars($str[ $pos - 2 ]);
602 echo htmlspecialchars($str[ $pos - 1 ]);
604 echo htmlspecialchars($str[ $pos +
0 ]);
605 echo htmlspecialchars($str[ $pos +
1 ]);
606 echo htmlspecialchars($str[ $pos +
2 ]);
607 echo htmlspecialchars($str[ $pos +
3 ]);
608 echo htmlspecialchars($str[ $pos +
4 ]);
609 echo htmlspecialchars($str[ $pos +
5 ]);
610 echo ']<<<<<<<< PA <<<';
613 /*=====================================================================*\
614 || ###################################################################
617 || ###################################################################
618 \*=====================================================================*/